diff --git a/data/sfcf_test/data_o/test_r0/cfg2/F_V0 b/data/sfcf_test/data_o/test_r0/cfg2/F_V0
new file mode 100644
index 00000000..b0e4fb17
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg2/F_V0
@@ -0,0 +1,230 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_oF_V0
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diff --git a/data/sfcf_test/data_o/test_r0/cfg2/f_1 b/data/sfcf_test/data_o/test_r0/cfg2/f_1
new file mode 100644
index 00000000..09751218
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg2/f_1
@@ -0,0 +1,194 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
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+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_of_1
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diff --git a/data/sfcf_test/data_o/test_r0/cfg2/f_A b/data/sfcf_test/data_o/test_r0/cfg2/f_A
new file mode 100644
index 00000000..74be18ea
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg2/f_A
@@ -0,0 +1,80 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_of_A
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diff --git a/data/sfcf_test/data_o/test_r0/cfg3/F_V0 b/data/sfcf_test/data_o/test_r0/cfg3/F_V0
new file mode 100644
index 00000000..b0e4fb17
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg3/F_V0
@@ -0,0 +1,230 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
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+param_name  sfcf_unity_test.in
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+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_oF_V0
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diff --git a/data/sfcf_test/data_o/test_r0/cfg3/f_1 b/data/sfcf_test/data_o/test_r0/cfg3/f_1
new file mode 100644
index 00000000..09751218
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg3/f_1
@@ -0,0 +1,194 @@
+[run]
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+dir         /scratch/tmp/j_kuhl19
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diff --git a/data/sfcf_test/data_o/test_r0/cfg3/f_A b/data/sfcf_test/data_o/test_r0/cfg3/f_A
new file mode 100644
index 00000000..74be18ea
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg3/f_A
@@ -0,0 +1,80 @@
+[run]
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+version     2.1
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+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
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+param_name  sfcf_unity_test.in
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diff --git a/data/sfcf_test/data_o/test_r0/cfg4/F_V0 b/data/sfcf_test/data_o/test_r0/cfg4/F_V0
new file mode 100644
index 00000000..b0e4fb17
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg4/F_V0
@@ -0,0 +1,230 @@
+[run]
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diff --git a/data/sfcf_test/data_o/test_r0/cfg4/f_1 b/data/sfcf_test/data_o/test_r0/cfg4/f_1
new file mode 100644
index 00000000..09751218
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg4/f_1
@@ -0,0 +1,194 @@
+[run]
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++3.5120808902177453e+02 +5.1331372776616026e-15
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++3.5122104108046193e+02 +5.0816653044831932e-15
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diff --git a/data/sfcf_test/data_o/test_r0/cfg4/f_A b/data/sfcf_test/data_o/test_r0/cfg4/f_A
new file mode 100644
index 00000000..74be18ea
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg4/f_A
@@ -0,0 +1,80 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_of_A
+
+[correlator]
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+name      f_A
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+  2 +1.0447210336915187e+00 +8.9219487930753188e-13
+  3 -4.1025094911185178e+01 -4.8315634170546161e-14
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+[correlator]
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+  3 -4.1024441815729936e+01 -5.7107484666182308e-15
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diff --git a/data/sfcf_test/data_o/test_r0/cfg5/F_V0 b/data/sfcf_test/data_o/test_r0/cfg5/F_V0
new file mode 100644
index 00000000..b0e4fb17
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg5/F_V0
@@ -0,0 +1,230 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_oF_V0
+
+[correlator]
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diff --git a/data/sfcf_test/data_o/test_r0/cfg5/f_1 b/data/sfcf_test/data_o/test_r0/cfg5/f_1
new file mode 100644
index 00000000..09751218
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg5/f_1
@@ -0,0 +1,194 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_of_1
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+[correlator]
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++3.5119415254545021e+02 +6.7620978057264750e-15
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diff --git a/data/sfcf_test/data_o/test_r0/cfg5/f_A b/data/sfcf_test/data_o/test_r0/cfg5/f_A
new file mode 100644
index 00000000..74be18ea
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r0/cfg5/f_A
@@ -0,0 +1,80 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_of_A
+
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diff --git a/data/sfcf_test/data_o/test_r1/cfg1/F_V0 b/data/sfcf_test/data_o/test_r1/cfg1/F_V0
new file mode 100644
index 00000000..b0e4fb17
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r1/cfg1/F_V0
@@ -0,0 +1,230 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
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diff --git a/data/sfcf_test/data_o/test_r1/cfg1/f_1 b/data/sfcf_test/data_o/test_r1/cfg1/f_1
new file mode 100644
index 00000000..09751218
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r1/cfg1/f_1
@@ -0,0 +1,194 @@
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diff --git a/data/sfcf_test/data_o/test_r1/cfg1/f_A b/data/sfcf_test/data_o/test_r1/cfg1/f_A
new file mode 100644
index 00000000..74be18ea
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r1/cfg1/f_A
@@ -0,0 +1,80 @@
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diff --git a/data/sfcf_test/data_o/test_r2/cfg1/F_V0 b/data/sfcf_test/data_o/test_r2/cfg1/F_V0
new file mode 100644
index 00000000..b0e4fb17
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r2/cfg1/F_V0
@@ -0,0 +1,230 @@
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+quarks    lquark lquark
+offset    1
+wf        1
+wf_2      1
+corr_t
+  1 +6.8372805529855032e+02 -9.5155281099707234e-10
+  2 +6.6136765506988547e+02 +3.2963797613709602e-10
+  3 +6.8372805529743755e+02 -2.3745220688244645e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        1
+wf_2      2
+corr_t
+  1 +6.8373006805699742e+02 -9.5155561220425917e-10
+  2 +6.6136960200379315e+02 +3.2963894649982994e-10
+  3 +6.8373006805588454e+02 -2.3745290592048597e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      0
+corr_t
+  1 +6.8370484437279174e+02 -9.5153224647433932e-10
+  2 +6.6134520322602452e+02 +3.2961543119772646e-10
+  3 +6.8370484437167897e+02 -2.3745588436057620e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      1
+corr_t
+  1 +6.8373006805699617e+02 -9.5156735103669992e-10
+  2 +6.6136960200379178e+02 +3.2962759157000606e-10
+  3 +6.8373006805588329e+02 -2.3746464475292832e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      2
+corr_t
+  1 +6.8373208082136819e+02 -9.5157015223999714e-10
+  2 +6.6137154894343041e+02 +3.2962856194733528e-10
+  3 +6.8373208082025531e+02 -2.3746534378088984e-10
+
diff --git a/data/sfcf_test/data_o/test_r2/cfg1/f_1 b/data/sfcf_test/data_o/test_r2/cfg1/f_1
new file mode 100644
index 00000000..09751218
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r2/cfg1/f_1
@@ -0,0 +1,194 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_of_1
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    0
+wf        0
+wf_2      0
+corr
++3.5119415254545021e+02 +6.7620978057264750e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    0
+wf        0
+wf_2      1
+corr
++3.5120703575855339e+02 +6.5026340956203663e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    0
+wf        0
+wf_2      2
+corr
++3.5120808902177868e+02 +6.5443496235264788e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    0
+wf        1
+wf_2      0
+corr
++3.5120703575855515e+02 +6.9706500417651470e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    0
+wf        1
+wf_2      1
+corr
++3.5122001235609065e+02 +6.9516150897757419e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    0
+wf        1
+wf_2      2
+corr
++3.5122104108046199e+02 +6.9232860455434941e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    0
+wf        2
+wf_2      0
+corr
++3.5120808902177447e+02 +1.0849949614595719e-14
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    0
+wf        2
+wf_2      1
+corr
++3.5122104108046182e+02 +1.0866063643253473e-14
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    0
+wf        2
+wf_2      2
+corr
++3.5122207631098047e+02 +1.0827277318679030e-14
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        0
+wf_2      0
+corr
++3.5119415254545038e+02 +3.0143306723935508e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        0
+wf_2      1
+corr
++3.5120703575855367e+02 +4.3340379505972648e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        0
+wf_2      2
+corr
++3.5120808902177902e+02 +3.9652247575094006e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        1
+wf_2      0
+corr
++3.5120703575855526e+02 -8.2540994138261318e-16
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        1
+wf_2      1
+corr
++3.5122001235609082e+02 -9.7121215247039609e-16
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        1
+wf_2      2
+corr
++3.5122104108046227e+02 -9.0872484903683497e-16
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      0
+corr
++3.5120808902177453e+02 +5.1331372776616026e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      1
+corr
++3.5122104108046193e+02 +5.0816653044831932e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      2
+corr
++3.5122207631098064e+02 +5.1165649253001659e-15
+
diff --git a/data/sfcf_test/data_o/test_r2/cfg1/f_A b/data/sfcf_test/data_o/test_r2/cfg1/f_A
new file mode 100644
index 00000000..74be18ea
--- /dev/null
+++ b/data/sfcf_test/data_o/test_r2/cfg1/f_A
@@ -0,0 +1,80 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_of_A
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    0
+wf        0
+corr_t
+  1 +6.5471188727972304e+01 -6.1214214711790100e-12
+  2 +1.0447210336915187e+00 +8.9219487930753188e-13
+  3 -4.1025094911185178e+01 -4.8315634170546161e-14
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    0
+wf        1
+corr_t
+  1 +6.5551520722862705e+01 +2.0963356863957609e-13
+  2 +1.0542820240851569e+00 +2.3989756974599379e-15
+  3 -4.1024441815729936e+01 -5.7107484666182308e-15
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    0
+wf        2
+corr_t
+  1 +6.5529951269442847e+01 -6.6512260271334321e-14
+  2 +1.0516822345055969e+00 -2.2935262162529075e-15
+  3 -4.1025142768037746e+01 +3.7566377680004518e-16
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    1
+wf        0
+corr_t
+  1 +6.5471188727965909e+01 -1.6112786177915427e-11
+  2 +1.0447210337411881e+00 -7.0387528705692678e-13
+  3 -4.1025094911167137e+01 +4.6509152745618223e-13
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    1
+wf        1
+corr_t
+  1 +6.5551520722842213e+01 -8.1976426690345305e-13
+  2 +1.0542820240843382e+00 +2.1626370477046812e-13
+  3 -4.1024441815730086e+01 -2.4147931196409923e-14
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    1
+wf        2
+corr_t
+  1 +6.5529951269443117e+01 +7.9192560386479701e-14
+  2 +1.0516822345055870e+00 -1.2443038782429568e-14
+  3 -4.1025142768037739e+01 +5.9315333178954509e-17
+
diff --git a/pyerrors/input/openQCD.py b/pyerrors/input/openQCD.py
index 3c50a3d2..97208fde 100644
--- a/pyerrors/input/openQCD.py
+++ b/pyerrors/input/openQCD.py
@@ -217,8 +217,7 @@ def read_rwms(path, prefix, version='2.0', names=None, **kwargs):
     return result
 
 
-def extract_t0(path, prefix, dtr_read, xmin,
-               spatial_extent, fit_range=5, **kwargs):
+def extract_t0(path, prefix, dtr_read, xmin, spatial_extent, fit_range=5, **kwargs):
     """Extract t0 from given .ms.dat files. Returns t0 as Obs.
 
     It is assumed that all boundary effects have
diff --git a/pyerrors/input/sfcf.py b/pyerrors/input/sfcf.py
index 8d73423d..bd5c95e1 100644
--- a/pyerrors/input/sfcf.py
+++ b/pyerrors/input/sfcf.py
@@ -9,57 +9,46 @@ from ..obs import Obs
 from . import utils
 
 
-def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
-              version="1.0c", **kwargs):
-    """Read sfcf format from given folder structure.
+def read_sfcf(path, prefix, name, quarks='.*', corr_type='bi', noffset=0, wf=0, wf2=0, version="1.0c", **kwargs):
+    """Read sfcf c format from given folder structure.
 
     Parameters
     ----------
-    path : str
-        Path to the measurement files.
-    prefix : str
-        Ensemble prefix for which the data is to be extracted.
-    name : str
-        Name of the correlation function to be extracted from the file
-    quarks: str, optional
+    quarks: str
         Label of the quarks used in the sfcf input file. e.g. "quark quark"
         for version 0.0 this does NOT need to be given with the typical " - "
         that is present in the output file,
         this is done automatically for this version
-    noffset: int, optional
+    noffset: int
         Offset of the source (only relevant when wavefunctions are used)
-    wf: int, optional
+    wf: int
         ID of wave function
-    wf2: int, optional
+    wf2: int
         ID of the second wavefunction
         (only relevant for boundary-to-boundary correlation functions)
-    im: bool, optional
+    im: bool
         if True, read imaginary instead of real part
         of the correlation function.
-    b2b: bool, optional
-        if True, read a time-dependent boundary-to-boundary
-        correlation function
-    single: bool, optional
-        if True, read time independent boundary to boundary
-        correlation function
-    names: list, optional
+    corr_type : str
+        change between bi (boundary - inner) (default) bib (boundary - inner - boundary) and bb (boundary - boundary)
+        correlator types
+    names : list
         Alternative labeling for replicas/ensembles.
         Has to have the appropriate length
-    ens_name : str, optional
+    ens_name : str
         replaces the name of the ensemble
-    version: str, optional
+    version: str
         version of SFCF, with which the measurement was done.
-        if the compact output option (-c) was specified,
+        if the compact output option (-c) was spectified,
         append a "c" to the version (e.g. "1.0c")
         if the append output option (-a) was specified,
-        append an "a" to the version. Currently supported versions
-        are "0.0", "1.0", "2.0", "1.0c", "2.0c", "1.0a" and "2.0a".
-    replica: list, optional
+        append an "a" to the version
+    replica: list
         list of replica to be read, default is all
-    files: list, optional
+    files: list
         list of files to be read per replica, default is all.
-        for non-compact output format, hand the folders to be read here.
-    check_configs: list, optional
+        for non-conpact ouztput format, hand the folders to be read here.
+    check_configs:
         list of list of supposed configs, eg. [range(1,1000)]
         for one replicum with 1000 configs
     """
@@ -69,25 +58,28 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
     else:
         im = 0
         part = 'real'
-
-    if kwargs.get('single'):
-        b2b = 1
-        single = 1
-    else:
-        if kwargs.get('b2b'):
-            b2b = 1
-        else:
-            b2b = 0
-        single = 0
     if "replica" in kwargs:
         reps = kwargs.get("replica")
-
+    if corr_type == 'bb':
+        b2b = True
+        single = True
+    elif corr_type == 'bib':
+        b2b = True
+        single = False
+    else:
+        b2b = False
+        single = False
+    # due to higher usage in current projects,
+    # compact file format is default
     compact = True
     appended = False
+    # get version string
     known_versions = ["0.0", "1.0", "2.0", "1.0c", "2.0c", "1.0a", "2.0a"]
 
     if version not in known_versions:
         raise Exception("This version is not known!")
+    # if the letter c is appended to the version,
+    # the compact fileformat is used (former read_sfcf_c)
     if(version[-1] == "c"):
         appended = False
         compact = True
@@ -112,20 +104,22 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
             else:
                 ls.extend(filenames)
             break
+        if not ls:
+            raise Exception('Error, directory not found')
         # Exclude folders with different names
         for exc in ls:
             if not fnmatch.fnmatch(exc, prefix + '*'):
                 ls = list(set(ls) - set([exc]))
-    if not ls:
-        raise Exception('No matching directories found.')
-    if len(ls) > 1:
-        ls.sort(key=lambda x: int(re.findall(r'\d+', x[len(prefix):])[0]))
 
     if not appended:
+        if len(ls) > 1:
+            # New version, to cope with ids, etc.
+            ls.sort(key=lambda x: int(re.findall(r'\d+', x[len(prefix):])[0]))
         replica = len(ls)
     else:
         replica = len([file.split(".")[-1] for file in ls]) // len(set([file.split(".")[-1] for file in ls]))
-    print("Read", part, "part of '" + str(name) + "' with prefix '" + str(prefix) + "' (" + str(replica) + " replica)")
+    print('Read', part, 'part of', name, 'from', prefix[:-1],
+          ',', replica, 'replica')
     if 'names' in kwargs:
         new_names = kwargs.get('names')
         if len(new_names) != len(set(new_names)):
@@ -133,6 +127,8 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
         if len(new_names) != replica:
             raise Exception('Names does not have the required length', replica)
     else:
+        # Adjust replica names to new bookmarking system
+
         new_names = []
         if not appended:
             for entry in ls:
@@ -153,6 +149,7 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
             ls.sort(key=lambda x: int(re.findall(r'\d+', x)[-1]))
             for entry in ls:
                 myentry = entry[:-len(name) - 1]
+                # print(myentry)
                 try:
                     idx = myentry.index('r')
                 except Exception:
@@ -162,6 +159,7 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
                     new_names.append(kwargs.get('ens_name') + '|' + myentry[idx:])
                 else:
                     new_names.append(myentry[:idx] + '|' + myentry[idx:])
+            # print(new_names)
     idl = []
     if not appended:
         for i, item in enumerate(ls):
@@ -177,16 +175,18 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
                         sub_ls.extend(dirnames)
                     break
 
-                for exc in sub_ls:
-                    if compact:
+                # print(sub_ls)
+                if compact:
+                    for exc in sub_ls:
                         if not fnmatch.fnmatch(exc, prefix + '*'):
                             sub_ls = list(set(sub_ls) - set([exc]))
-                        sub_ls.sort(key=lambda x:
-                                    int(re.findall(r'\d+', x)[-1]))
-                    else:
+                    sub_ls.sort(key=lambda x: int(re.findall(r'\d+', x)[-1]))
+                else:
+                    for exc in sub_ls:
                         if not fnmatch.fnmatch(exc, 'cfg*'):
                             sub_ls = list(set(sub_ls) - set([exc]))
-                        sub_ls.sort(key=lambda x: int(x[3:]))
+                    sub_ls.sort(key=lambda x: int(x[3:]))
+            # print(sub_ls)
             rep_idl = []
             no_cfg = len(sub_ls)
             for cfg in sub_ls:
@@ -198,88 +198,98 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
                 except Exception:
                     raise Exception("Couldn't parse idl from directroy, problem with file " + cfg)
             rep_idl.sort()
+            # maybe there is a better way to print the idls
             print(item, ':', no_cfg, ' configurations')
             idl.append(rep_idl)
+        # here we have found all the files we need to look into.
             if i == 0:
-                if compact:
+                # here, we want to find the place within the file,
+                # where the correlator we need is stored.
+                # to do so, the pattern needed is put together
+                # from the input values
+                if version == "0.0":
+                    pattern = "# " + name + " : offset " + str(noffset) + ", wf " + str(wf)
+                    # if b2b, a second wf is needed
+                    if b2b:
+                        pattern += ", wf_2 " + str(wf2)
+                    qs = quarks.split(" ")
+                    pattern += " : " + qs[0] + " - " + qs[1]
+                    file = open(path + '/' + item + '/' + sub_ls[0] + '/' + name, "r")
+                    for k, line in enumerate(file):
+                        if read == 1 and not line.strip() and k > start + 1:
+                            break
+                        if read == 1 and k >= start:
+                            T += 1
+                        if pattern in line:
+                            read = 1
+                            start = k + 1
+                    print(str(T) + " entries found.")
+                else:
                     pattern = 'name      ' + name + '\nquarks    ' + quarks + '\noffset    ' + str(noffset) + '\nwf        ' + str(wf)
                     if b2b:
                         pattern += '\nwf_2      ' + str(wf2)
-                    with open(path + '/' + item + '/' + sub_ls[0], 'r') as file:
-                        content = file.read()
-                        match = re.search(pattern, content)
-                        if match:
-                            # the start and end point of the correlator
-                            # in question is extracted for later use in
-                            # the other files
-                            start_read = content.count('\n', 0, match.start()) + 5 + b2b
-                            end_match = re.search(r'\n\s*\n', content[match.start():])
-                            T = content[match.start():].count('\n', 0, end_match.start()) - 4 - b2b
-                            assert T > 0
-                            print(T, 'entries, starting to read in line', start_read)
-                        else:
-                            raise Exception('Correlator with pattern\n' + pattern + '\nnot found.')
-                else:
-                    # this part does the same as above,
-                    # but for non-compactified versions of the files
-                    with open(path + '/' + item + '/' + sub_ls[0] + '/' + name) as fp:
-                        for k, line in enumerate(fp):
-                            if version == "0.0":
-                                # check if this is really the right file
-                                # by matching pattern similar to above
-                                pattern = "# " + name + " : offset " + str(noffset) + ", wf " + str(wf)
-                                # if b2b, a second wf is needed
-                                if b2b:
-                                    pattern += ", wf_2 " + str(wf2)
-                                qs = quarks.split(" ")
-                                pattern += " : " + qs[0] + " - " + qs[1]
-                            if read == 1 and not line.strip() and k > start + 1:
-                                break
-                            if read == 1 and k >= start:
-                                T += 1
+                    # and the file is parsed through to find the pattern
+                    if compact:
+                        file = open(path + '/' + item + '/' + sub_ls[0], "r")
+                    else:
+                        # for non-compactified versions of the files
+                        file = open(path + '/' + item + '/' + sub_ls[0] + '/' + name, "r")
 
-                            if version == "0.0":
-                                if pattern in line:
-                                    # print(line)
-                                    read = 1
-                                    start = k + 1
-                            else:
-                                if '[correlator]' in line:
-                                    read = 1
-                                    start = k + 7 + b2b
-                                    T -= b2b
-                        print(str(T) + " entries found.")
+                    content = file.read()
+                    match = re.search(pattern, content)
+                    if match:
+                        start_read = content.count('\n', 0, match.start()) + 5 + b2b
+                        end_match = re.search(r'\n\s*\n', content[match.start():])
+                        T = content[match.start():].count('\n', 0, end_match.start()) - 4 - b2b
+                        assert T > 0
+                        print(T, 'entries, starting to read in line', start_read)
+                    else:
+                        raise Exception('Correlator with pattern\n' + pattern + '\nnot found.')
+                # we found where the correlator
+                # that is to be read is in the files
+                # after preparing the datastructure
+                # the correlators get parsed into...
                 deltas = []
                 for j in range(T):
                     deltas.append([])
 
             for t in range(T):
                 deltas[t].append(np.zeros(no_cfg))
+            # ...the actual parsing can start.
             # we iterate through all measurement files in the path given...
             if compact:
                 for cfg in range(no_cfg):
                     with open(path + '/' + item + '/' + sub_ls[cfg]) as fp:
                         lines = fp.readlines()
+                        # check, if the correlator is in fact
+                        # printed completely
                         if(start_read + T > len(lines)):
                             raise Exception("EOF before end of correlator data! Maybe " + path + '/' + item + '/' + sub_ls[cfg] + " is corrupted?")
+                        # and start to read the correlator.
+                        # the range here is chosen like this,
+                        # since this allows for implementing
+                        # a security check for every read correlator later...
                         for k in range(start_read - 6, start_read + T):
                             if k == start_read - 5 - b2b:
                                 if lines[k].strip() != 'name      ' + name:
-                                    raise Exception('Wrong format',
-                                                    sub_ls[cfg])
+                                    raise Exception('Wrong format', sub_ls[cfg])
                             if(k >= start_read and k < start_read + T):
                                 floats = list(map(float, lines[k].split()))
                                 deltas[k - start_read][i][cfg] = floats[-2:][im]
             else:
                 for cnfg, subitem in enumerate(sub_ls):
                     with open(path + '/' + item + '/' + subitem + '/' + name) as fp:
+                        # since the non-compatified files
+                        # are typically not so long,
+                        # we can iterate over the whole file.
+                        # here one can also implement the chekc from above.
                         for k, line in enumerate(fp):
-                            if(k >= start and k < start + T):
+                            if(k >= start_read and k < start_read + T):
                                 floats = list(map(float, line.split()))
                                 if version == "0.0":
-                                    deltas[k - start][i][cnfg] = floats[im]
+                                    deltas[k - start][i][cnfg] = floats[im - single]
                                 else:
-                                    deltas[k - start][i][cnfg] = floats[1 + im - single]
+                                    deltas[k - start_read][i][cnfg] = floats[1 + im - single]
 
     else:
         if "files" in kwargs:
@@ -289,8 +299,6 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
                 if not fnmatch.fnmatch(exc, prefix + '*.' + name):
                     ls = list(set(ls) - set([exc]))
                 ls.sort(key=lambda x: int(re.findall(r'\d+', x)[-1]))
-        if len(ls) == 0:
-            raise Exception('File(s) for correlator ' + name + ' not found.')
         pattern = 'name      ' + name + '\nquarks    ' + quarks + '\noffset    ' + str(noffset) + '\nwf        ' + str(wf)
         if b2b:
             pattern += '\nwf_2      ' + str(wf2)
@@ -302,9 +310,9 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
                 for linenumber, line in enumerate(content):
                     if "[run]" in line:
                         data_starts.append(linenumber)
-                if len(set([data_starts[i] - data_starts[i - 1] for i in
-                            range(1, len(data_starts))])) > 1:
+                if len(set([data_starts[i] - data_starts[i - 1] for i in range(1, len(data_starts))])) > 1:
                     raise Exception("Irregularities in file structure found, not all runs have the same output length")
+                # first chunk of data
                 chunk = content[:data_starts[1]]
                 for linenumber, line in enumerate(chunk):
                     if line.startswith("gauge_name"):
@@ -312,25 +320,31 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
                     elif line.startswith("[correlator]"):
                         corr_line = linenumber
                         found_pat = ""
-                        for li in chunk[corr_line + 1:corr_line + 6 + b2b]:
+                        for li in chunk[corr_line + 1: corr_line + 6 + b2b]:
                             found_pat += li
                         if re.search(pattern, found_pat):
                             start_read = corr_line + 7 + b2b
-                            T = len(chunk) - 1 - start_read
+                            break
+                endline = corr_line + 6 + b2b
+                while not chunk[endline] == "\n":
+                    endline += 1
+                T = endline - start_read
                 if rep == 0:
                     deltas = []
                     for t in range(T):
                         deltas.append([])
                 for t in range(T):
                     deltas[t].append(np.zeros(len(data_starts)))
+                # all other chunks should follow the same structure
                 for cnfg in range(len(data_starts)):
                     start = data_starts[cnfg]
                     stop = start + data_starts[1]
                     chunk = content[start:stop]
+                    # meta_data = {}
                     try:
                         rep_idl.append(int(chunk[gauge_line].split("n")[-1]))
                     except Exception:
-                        raise Exception("Couldn't parse idl from directroy, problem with chunk around line " + gauge_line)
+                        raise Exception("Couldn't parse idl from directory, problem with chunk around line ", gauge_line)
 
                     found_pat = ""
                     for li in chunk[corr_line + 1:corr_line + 6 + b2b]:
@@ -338,7 +352,7 @@ def read_sfcf(path, prefix, name, quarks='.*', noffset=0, wf=0, wf2=0,
                     if re.search(pattern, found_pat):
                         for t, line in enumerate(chunk[start_read:start_read + T]):
                             floats = list(map(float, line.split()))
-                            deltas[t][rep][cnfg] = floats[-2:][im]
+                            deltas[t][rep][cnfg] = floats[im + 1 - single]
             idl.append(rep_idl)
 
     if "check_configs" in kwargs:
diff --git a/tests/data/sfcf_test/data_a/data_a_r0.F_V0 b/tests/data/sfcf_test/data_a/data_a_r0.F_V0
new file mode 100644
index 00000000..1d490c03
--- /dev/null
+++ b/tests/data/sfcf_test/data_a/data_a_r0.F_V0
@@ -0,0 +1,1150 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:03 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /data_a_r0_n1
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_aF_V0
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        0
+wf_2      0
+corr_t
+  1 +6.8367760900851147e+02 +3.0531839956225539e-10
+  2 +6.6131885855823339e+02 +3.9736225045852382e-12
+  3 +6.8367760900810049e+02 -2.5611665964422843e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        0
+wf_2      1
+corr_t
+  1 +6.8370283168793060e+02 +3.0532966356282939e-10
+  2 +6.6134325636407561e+02 +3.9737690976212336e-12
+  3 +6.8370283168751973e+02 -2.5612610847134760e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        0
+wf_2      2
+corr_t
+  1 +6.8370484437212463e+02 +3.0533056232915147e-10
+  2 +6.6134520322615822e+02 +3.9737807346122766e-12
+  3 +6.8370484437171353e+02 -2.5612686251836130e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        1
+wf_2      0
+corr_t
+  1 +6.8370283168792889e+02 +3.0532890521977295e-10
+  2 +6.6134325636407402e+02 +3.9730355551484655e-12
+  3 +6.8370283168751791e+02 -2.5612686681440218e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        1
+wf_2      1
+corr_t
+  1 +6.8372805529787934e+02 +3.0534016954586185e-10
+  2 +6.6136765507001564e+02 +3.9731820664935325e-12
+  3 +6.8372805529746825e+02 -2.5613631608015786e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        1
+wf_2      2
+corr_t
+  1 +6.8373006805632656e+02 +3.0534106842445933e-10
+  2 +6.6136960200392332e+02 +3.9731937804440792e-12
+  3 +6.8373006805591558e+02 -2.5613707007587266e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        2
+wf_2      0
+corr_t
+  1 +6.8370484437212156e+02 +3.0532220084664646e-10
+  2 +6.6134520322615526e+02 +3.9656927030717790e-12
+  3 +6.8370484437171069e+02 -2.5613522400086377e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        2
+wf_2      1
+corr_t
+  1 +6.8373006805632599e+02 +3.0533346499198999e-10
+  2 +6.6136960200392275e+02 +3.9658390079382195e-12
+  3 +6.8373006805591490e+02 -2.5614467350834153e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        2
+wf_2      2
+corr_t
+  1 +6.8373208082069789e+02 +3.0533436384459901e-10
+  2 +6.6137154894356127e+02 +3.9658506942251639e-12
+  3 +6.8373208082028680e+02 -2.5614542753491032e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        0
+wf_2      0
+corr_t
+  1 +6.8367760900918211e+02 -9.5149222536505804e-10
+  2 +6.6131885855810310e+02 +3.2960434859595585e-10
+  3 +6.8367760900806934e+02 -2.3744430846347533e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        0
+wf_2      1
+corr_t
+  1 +6.8370283168860135e+02 -9.5152732859532533e-10
+  2 +6.6134325636394544e+02 +3.2961650841969937e-10
+  3 +6.8370283168748858e+02 -2.3745306857315358e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        0
+wf_2      2
+corr_t
+  1 +6.8370484437279526e+02 -9.5153012965274573e-10
+  2 +6.6134520322602793e+02 +3.2961747879154288e-10
+  3 +6.8370484437168250e+02 -2.3745376753897864e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        1
+wf_2      0
+corr_t
+  1 +6.8370283168859953e+02 -9.5151770701795658e-10
+  2 +6.6134325636394351e+02 +3.2962581533640458e-10
+  3 +6.8370283168748665e+02 -2.3744344699578737e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        1
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+  1 +6.8372805529855032e+02 -9.5155281099707234e-10
+  2 +6.6136765506988547e+02 +3.2963797613709602e-10
+  3 +6.8372805529743755e+02 -2.3745220688244645e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        1
+wf_2      2
+corr_t
+  1 +6.8373006805699742e+02 -9.5155561220425917e-10
+  2 +6.6136960200379315e+02 +3.2963894649982994e-10
+  3 +6.8373006805588454e+02 -2.3745290592048597e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      0
+corr_t
+  1 +6.8370484437279174e+02 -9.5153224647433932e-10
+  2 +6.6134520322602452e+02 +3.2961543119772646e-10
+  3 +6.8370484437167897e+02 -2.3745588436057620e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      1
+corr_t
+  1 +6.8373006805699617e+02 -9.5156735103669992e-10
+  2 +6.6136960200379178e+02 +3.2962759157000606e-10
+  3 +6.8373006805588329e+02 -2.3746464475292832e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      2
+corr_t
+  1 +6.8373208082136819e+02 -9.5157015223999714e-10
+  2 +6.6137154894343041e+02 +3.2962856194733528e-10
+  3 +6.8373208082025531e+02 -2.3746534378088984e-10
+
+[run]
+
+version     2.1
+date        2022-01-19 11:04:05 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /data_a_r0_n2
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_aF_V0
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        0
+wf_2      0
+corr_t
+  1 +6.8367760900851147e+02 +3.0531839956225539e-10
+  2 +6.6131885855823339e+02 +3.9736225045852382e-12
+  3 +6.8367760900810049e+02 -2.5611665964422843e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        0
+wf_2      1
+corr_t
+  1 +6.8370283168793060e+02 +3.0532966356282939e-10
+  2 +6.6134325636407561e+02 +3.9737690976212336e-12
+  3 +6.8370283168751973e+02 -2.5612610847134760e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        0
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+  1 +6.8370484437212463e+02 +3.0533056232915147e-10
+  2 +6.6134520322615822e+02 +3.9737807346122766e-12
+  3 +6.8370484437171353e+02 -2.5612686251836130e-10
+
+[correlator]
+
+name      F_V0
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+offset    0
+wf        1
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+  1 +6.8370283168792889e+02 +3.0532890521977295e-10
+  2 +6.6134325636407402e+02 +3.9730355551484655e-12
+  3 +6.8370283168751791e+02 -2.5612686681440218e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
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+  1 +6.8372805529787934e+02 +3.0534016954586185e-10
+  2 +6.6136765507001564e+02 +3.9731820664935325e-12
+  3 +6.8372805529746825e+02 -2.5613631608015786e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        1
+wf_2      2
+corr_t
+  1 +6.8373006805632656e+02 +3.0534106842445933e-10
+  2 +6.6136960200392332e+02 +3.9731937804440792e-12
+  3 +6.8373006805591558e+02 -2.5613707007587266e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        2
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+corr_t
+  1 +6.8370484437212156e+02 +3.0532220084664646e-10
+  2 +6.6134520322615526e+02 +3.9656927030717790e-12
+  3 +6.8370484437171069e+02 -2.5613522400086377e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        2
+wf_2      1
+corr_t
+  1 +6.8373006805632599e+02 +3.0533346499198999e-10
+  2 +6.6136960200392275e+02 +3.9658390079382195e-12
+  3 +6.8373006805591490e+02 -2.5614467350834153e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        2
+wf_2      2
+corr_t
+  1 +6.8373208082069789e+02 +3.0533436384459901e-10
+  2 +6.6137154894356127e+02 +3.9658506942251639e-12
+  3 +6.8373208082028680e+02 -2.5614542753491032e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
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+corr_t
+  1 +6.8367760900918211e+02 -9.5149222536505804e-10
+  2 +6.6131885855810310e+02 +3.2960434859595585e-10
+  3 +6.8367760900806934e+02 -2.3744430846347533e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        0
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+corr_t
+  1 +6.8370283168860135e+02 -9.5152732859532533e-10
+  2 +6.6134325636394544e+02 +3.2961650841969937e-10
+  3 +6.8370283168748858e+02 -2.3745306857315358e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        0
+wf_2      2
+corr_t
+  1 +6.8370484437279526e+02 -9.5153012965274573e-10
+  2 +6.6134520322602793e+02 +3.2961747879154288e-10
+  3 +6.8370484437168250e+02 -2.3745376753897864e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
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+wf_2      0
+corr_t
+  1 +6.8370283168859953e+02 -9.5151770701795658e-10
+  2 +6.6134325636394351e+02 +3.2962581533640458e-10
+  3 +6.8370283168748665e+02 -2.3744344699578737e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        1
+wf_2      1
+corr_t
+  1 +6.8372805529855032e+02 -9.5155281099707234e-10
+  2 +6.6136765506988547e+02 +3.2963797613709602e-10
+  3 +6.8372805529743755e+02 -2.3745220688244645e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        1
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+corr_t
+  1 +6.8373006805699742e+02 -9.5155561220425917e-10
+  2 +6.6136960200379315e+02 +3.2963894649982994e-10
+  3 +6.8373006805588454e+02 -2.3745290592048597e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      0
+corr_t
+  1 +6.8370484437279174e+02 -9.5153224647433932e-10
+  2 +6.6134520322602452e+02 +3.2961543119772646e-10
+  3 +6.8370484437167897e+02 -2.3745588436057620e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      1
+corr_t
+  1 +6.8373006805699617e+02 -9.5156735103669992e-10
+  2 +6.6136960200379178e+02 +3.2962759157000606e-10
+  3 +6.8373006805588329e+02 -2.3746464475292832e-10
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      2
+corr_t
+  1 +6.8373208082136819e+02 -9.5157015223999714e-10
+  2 +6.6137154894343041e+02 +3.2962856194733528e-10
+  3 +6.8373208082025531e+02 -2.3746534378088984e-10
+
+[run]
+
+version     2.1
+date        2022-01-19 11:04:07 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /data_a_r0_n3
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_aF_V0
+
+[correlator]
+
+name      F_V0
+quarks    lquark lquark
+offset    0
+wf        0
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index 00000000..5b905ac5
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index 00000000..58a7ca67
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new file mode 100644
index 00000000..90275570
--- /dev/null
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diff --git a/tests/data/sfcf_test/data_o/test_r0/cfg1/F_V0 b/tests/data/sfcf_test/data_o/test_r0/cfg1/F_V0
new file mode 100644
index 00000000..b0e4fb17
--- /dev/null
+++ b/tests/data/sfcf_test/data_o/test_r0/cfg1/F_V0
@@ -0,0 +1,230 @@
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diff --git a/tests/data/sfcf_test/data_o/test_r0/cfg1/f_1 b/tests/data/sfcf_test/data_o/test_r0/cfg1/f_1
new file mode 100644
index 00000000..09751218
--- /dev/null
+++ b/tests/data/sfcf_test/data_o/test_r0/cfg1/f_1
@@ -0,0 +1,194 @@
+[run]
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+wf        1
+wf_2      1
+corr
++3.5122001235609082e+02 -9.7121215247039609e-16
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        1
+wf_2      2
+corr
++3.5122104108046227e+02 -9.0872484903683497e-16
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      0
+corr
++3.5120808902177453e+02 +5.1331372776616026e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      1
+corr
++3.5122104108046193e+02 +5.0816653044831932e-15
+
+[correlator]
+
+name      f_1
+quarks    lquark lquark
+offset    1
+wf        2
+wf_2      2
+corr
++3.5122207631098064e+02 +5.1165649253001659e-15
+
diff --git a/tests/data/sfcf_test/data_o/test_r0/cfg1/f_A b/tests/data/sfcf_test/data_o/test_r0/cfg1/f_A
new file mode 100644
index 00000000..74be18ea
--- /dev/null
+++ b/tests/data/sfcf_test/data_o/test_r0/cfg1/f_A
@@ -0,0 +1,80 @@
+[run]
+
+version     2.1
+date        2022-01-19 11:04:00 +0100
+host        r04n07.palma.wwu
+dir         /scratch/tmp/j_kuhl19
+user        j_kuhl19
+gauge_name  /unity
+gauge_md5   1ea28326e4090996111a320b8372811d
+param_name  sfcf_unity_test.in
+param_md5   d881e90d41188a33b8b0f1bd0bc53ea5
+param_hash  686af5e712ee2902180f5428af94c6e7
+data_name   ./output_10519905/data_of_A
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    0
+wf        0
+corr_t
+  1 +6.5471188727972304e+01 -6.1214214711790100e-12
+  2 +1.0447210336915187e+00 +8.9219487930753188e-13
+  3 -4.1025094911185178e+01 -4.8315634170546161e-14
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    0
+wf        1
+corr_t
+  1 +6.5551520722862705e+01 +2.0963356863957609e-13
+  2 +1.0542820240851569e+00 +2.3989756974599379e-15
+  3 -4.1024441815729936e+01 -5.7107484666182308e-15
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    0
+wf        2
+corr_t
+  1 +6.5529951269442847e+01 -6.6512260271334321e-14
+  2 +1.0516822345055969e+00 -2.2935262162529075e-15
+  3 -4.1025142768037746e+01 +3.7566377680004518e-16
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    1
+wf        0
+corr_t
+  1 +6.5471188727965909e+01 -1.6112786177915427e-11
+  2 +1.0447210337411881e+00 -7.0387528705692678e-13
+  3 -4.1025094911167137e+01 +4.6509152745618223e-13
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    1
+wf        1
+corr_t
+  1 +6.5551520722842213e+01 -8.1976426690345305e-13
+  2 +1.0542820240843382e+00 +2.1626370477046812e-13
+  3 -4.1024441815730086e+01 -2.4147931196409923e-14
+
+[correlator]
+
+name      f_A
+quarks    lquark lquark
+offset    1
+wf        2
+corr_t
+  1 +6.5529951269443117e+01 +7.9192560386479701e-14
+  2 +1.0516822345055870e+00 -1.2443038782429568e-14
+  3 -4.1025142768037739e+01 +5.9315333178954509e-17
+
diff --git a/tests/data/sfcf_test/param/out.out b/tests/data/sfcf_test/param/out.out
new file mode 100644
index 00000000..0b3afcc7
--- /dev/null
+++ b/tests/data/sfcf_test/param/out.out
@@ -0,0 +1,3273 @@
+The following modules were not unloaded:
+  (Use "module --force purge" to unload all):
+
+  1) palma/2019a
+
+Currently Loaded Modules:
+  1) palma/2019a                       (S)
+  2) GCCcore/8.2.0
+  3) zlib/1.2.11
+  4) binutils/2.31.1
+  5) icc/2019.1.144-GCC-8.2.0-2.31.1
+  6) ifort/2019.1.144-GCC-8.2.0-2.31.1
+  7) impi/2018.4.274
+  8) imkl/2019.1.144
+  9) intel/2019a
+
+  Where:
+   S:  Module is Sticky, requires --force to unload or purge
+
+ 
+
+Build info
+----------
+Global lattice: 4 x 4 x 4 x 4
+Local lattice:  4 x 4 x 4 x 4 (u: 320+0 s: 192+0)
+Using single MPI process
+SFCF version: 2.1
+Using geometry 2 (boundary spinors mapped to dummy, u_ipt != s_ipt)
+Using solvers from openQCD
+Using dfl_update in DFL_SAP_GCR solver from openQCD
+Using oqcd_utils2.c from SFCF
+Using profiler functions also in openQCD interface
+Using SSE3
+Using prefetch PM
+Using prefetch P4
+
+Initialization
+--------------
+... initializing geometry
+... allocating gauge field
+... using unit gauge field
+Gauge field checked (184320 B, unused links: 64 zero, 1216 unity, BF0)
+Gauge checksum (MD5): 1ea28326e4090996111a320b8372811d
+... reading input file ('sfcf_unity_test.in')
+... finished reading input file (without hash) [input.c]
+
+Basic parameters:
+   Nf     = 3
+   beta   = 3.552200000000
+   ct     = 1.055185744046  (input)
+   cttilde= 0.974579134058  (input)
+   csw    = 1.822845956831  (input)
+   isw    = 0
+
+WARNING: The improvement coefficients have been calculated according to old
+         formulae, which were used in past simulations. If you do not need
+         compatibility to old simulations, you can use the newest formulae by
+         defining the preprocessor flag USE_LATEST_IMPROVEMENT.
+
+
+Solver parameters:
+   errsq = 1.000000e-18
+   nmax  = 4096
+
+   oqcd_solver_select = -1
+   oqcd_solver_param = 0xf04
+
+   [Solver 0]
+      solver = DFL_SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 1]
+      solver = CGNE
+      nmx    = 4096
+      res    = 1.000000e-10
+   [Solver 2]
+      solver = SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 3]
+      solver = CGNE_NO_EO
+      nkv    = 0
+      isolv  = 0
+      nmr    = 0
+      ncy    = 0
+      nmx    = 4096
+      res    = 1.000000e-10
+   [SAP]
+      bs     = 4 4 4 4
+   [[Deflation subspace]
+      bs     = 4 4 4 4
+      Ns     = 20
+   [[Deflation subspace generation]
+      kappa  = 1.371379e-01
+      mu     = 0.000000e+00
+      ninv   = 10
+      nmr    = 4
+      ncy    = 5
+   [[Deflation projection]
+      nkv     = 18
+      nmx     = 2048
+      res     = 1.000000e-02
+
+Source offsets: 2
+   offsets[0] = (0.0000000000000000e+00,0.0000000000000000e+00,0.0000000000000000e+00) = (0,0,0) sites
+WARNING in safe_ftoi [utils.c]: Fractional part exceeds tolerance (|0.5|>1e-06).   offsets[1] = (0.0000000000000000e+00,0.0000000000000000e+00,5.0000000000000000e-01) = (0,0,0) sites
+
+Wave-function parameters:
+   sigma type = delta
+   Wave-function basis:
+     element #0:  n_H = 0.000000000000  r_H = 2.666666666667
+     element #1:  n_H = 1.000000000000  r_H = 2.666666666667
+     element #2:  n_H = 0.000000000000  r_H = 5.333333333333
+   Wave-function coefficients:
+     element #0:  coeff = { 1.000000000000, 0.000000000000, 0.000000000000,}
+     element #1:  coeff = { 0.000000000000, 1.000000000000, 0.000000000000,}
+     element #2:  coeff = { 0.000000000000, 0.000000000000, 1.000000000000,}
+
+Relativistic quarks:
+   rel. quark #0: name = 'lquark' kappa = 0.137137900000   theta  = 0.500000000000  0.500000000000   0.500000000000  persistent
+
+Measurements for rr: 1
+   mrr[0] = (0, 0)
+
+Correlators for rr: 3
+   crr[0] = 'f_A'
+   crr[1] = 'f_1'
+   crr[2] = 'F_V0'
+
+Static actions (`smearings'):
+
+Static quarks:
+
+Measurements for rs: 0
+
+Correlators for rs: 0
+
+... allocating rprop (32 blocks)
+... initializing dataio (a=0 f=0 b=0 c=1 dname='./output_10519905/data_c' p=0 pname='./output_10519905/parameters_c')
+... creating data file './output_10519905/data_c' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7, param_md5 = d881e90d41188a33b8b0f1bd0bc53ea5)
+
+Plaquette:
+
+  sum:          4.09557397714092622e+03
+  sum (time):   2.36757397714092622e+03
+  sum (space):  1.72800000000000000e+03
+  sum (avg.):   1.01576735544169794e+00
+  dS/deta:      0.00000000000000000e+00
+  vbar:         0.00000000000000000e+00
+
+
+
+RR Correlation Functions
+------------------------
+
+  offset[0] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +0.0000000000000000e+00}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+  offset[1] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +5.0000000000000000e-01}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+
+
+RS Correlation Functions
+------------------------
+
+... finalizing dataio
+
+
+OK: All 197 PSDdummy are zero
+
+Maximum memory usage (rank 0): 8.61 MB (8.61 by SFCF, 0.00 by openQCD)
+Current memory usage (rank 0): 8.58 MB (8.58 by SFCF, 0.00 by openQCD)
+
+Total execution time with solver -1 (CG):  2.11e+00 sec
+
+   section                       count  avg sec   tot sec   rel cost
+   -----------------------------------------------------------------
+   main                              1  1.06e-03  1.06e-03     0.1 %
+   reading input                     1  1.82e+00  1.82e+00    85.9 %
+   IO config                         1  9.28e-04  9.28e-04     0.0 %
+   IO data                           2  3.03e-03  6.06e-03     0.3 %
+   mem alloc                         2  1.30e-03  2.60e-03     0.1 %
+   solver (sfcf only)               60  4.51e-03  2.70e-01    12.8 %
+   rr correlators                    1  1.59e-02  1.59e-02     0.8 %
+   rs correlators                    1  1.19e-06  1.19e-06     0.0 %
+
+End.
+Build info
+----------
+Global lattice: 4 x 4 x 4 x 4
+Local lattice:  4 x 4 x 4 x 4 (u: 320+0 s: 192+0)
+Using single MPI process
+SFCF version: 2.1
+Using geometry 2 (boundary spinors mapped to dummy, u_ipt != s_ipt)
+Using solvers from openQCD
+Using dfl_update in DFL_SAP_GCR solver from openQCD
+Using oqcd_utils2.c from SFCF
+Using profiler functions also in openQCD interface
+Using SSE3
+Using prefetch PM
+Using prefetch P4
+
+Initialization
+--------------
+... initializing geometry
+... allocating gauge field
+... using unit gauge field
+Gauge field checked (184320 B, unused links: 64 zero, 1216 unity, BF0)
+Gauge checksum (MD5): 1ea28326e4090996111a320b8372811d
+... reading input file ('sfcf_unity_test.in')
+... finished reading input file (without hash) [input.c]
+
+Basic parameters:
+   Nf     = 3
+   beta   = 3.552200000000
+   ct     = 1.055185744046  (input)
+   cttilde= 0.974579134058  (input)
+   csw    = 1.822845956831  (input)
+   isw    = 0
+
+WARNING: The improvement coefficients have been calculated according to old
+         formulae, which were used in past simulations. If you do not need
+         compatibility to old simulations, you can use the newest formulae by
+         defining the preprocessor flag USE_LATEST_IMPROVEMENT.
+
+
+Solver parameters:
+   errsq = 1.000000e-18
+   nmax  = 4096
+
+   oqcd_solver_select = -1
+   oqcd_solver_param = 0xf04
+
+   [Solver 0]
+      solver = DFL_SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 1]
+      solver = CGNE
+      nmx    = 4096
+      res    = 1.000000e-10
+   [Solver 2]
+      solver = SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 3]
+      solver = CGNE_NO_EO
+      nkv    = 0
+      isolv  = 0
+      nmr    = 0
+      ncy    = 0
+      nmx    = 4096
+      res    = 1.000000e-10
+   [SAP]
+      bs     = 4 4 4 4
+   [[Deflation subspace]
+      bs     = 4 4 4 4
+      Ns     = 20
+   [[Deflation subspace generation]
+      kappa  = 1.371379e-01
+      mu     = 0.000000e+00
+      ninv   = 10
+      nmr    = 4
+      ncy    = 5
+   [[Deflation projection]
+      nkv     = 18
+      nmx     = 2048
+      res     = 1.000000e-02
+
+Source offsets: 2
+   offsets[0] = (0.0000000000000000e+00,0.0000000000000000e+00,0.0000000000000000e+00) = (0,0,0) sites
+WARNING in safe_ftoi [utils.c]: Fractional part exceeds tolerance (|0.5|>1e-06).   offsets[1] = (0.0000000000000000e+00,0.0000000000000000e+00,5.0000000000000000e-01) = (0,0,0) sites
+
+Wave-function parameters:
+   sigma type = delta
+   Wave-function basis:
+     element #0:  n_H = 0.000000000000  r_H = 2.666666666667
+     element #1:  n_H = 1.000000000000  r_H = 2.666666666667
+     element #2:  n_H = 0.000000000000  r_H = 5.333333333333
+   Wave-function coefficients:
+     element #0:  coeff = { 1.000000000000, 0.000000000000, 0.000000000000,}
+     element #1:  coeff = { 0.000000000000, 1.000000000000, 0.000000000000,}
+     element #2:  coeff = { 0.000000000000, 0.000000000000, 1.000000000000,}
+
+Relativistic quarks:
+   rel. quark #0: name = 'lquark' kappa = 0.137137900000   theta  = 0.500000000000  0.500000000000   0.500000000000  persistent
+
+Measurements for rr: 1
+   mrr[0] = (0, 0)
+
+Correlators for rr: 3
+   crr[0] = 'f_A'
+   crr[1] = 'f_1'
+   crr[2] = 'F_V0'
+
+Static actions (`smearings'):
+
+Static quarks:
+
+Measurements for rs: 0
+
+Correlators for rs: 0
+
+... allocating rprop (32 blocks)
+... initializing dataio (a=0 f=0 b=0 c=0 dname='./output_10519905/data_o' p=0 pname='./output_10519905/parameters_o')
+... creating data file './output_10519905/data_of_A' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7, param_md5 = d881e90d41188a33b8b0f1bd0bc53ea5)
+... creating data file './output_10519905/data_of_1' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7, param_md5 = d881e90d41188a33b8b0f1bd0bc53ea5)
+... creating data file './output_10519905/data_oF_V0' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7, param_md5 = d881e90d41188a33b8b0f1bd0bc53ea5)
+
+Plaquette:
+
+  sum:          4.09557397714092622e+03
+  sum (time):   2.36757397714092622e+03
+  sum (space):  1.72800000000000000e+03
+  sum (avg.):   1.01576735544169794e+00
+  dS/deta:      0.00000000000000000e+00
+  vbar:         0.00000000000000000e+00
+
+
+
+RR Correlation Functions
+------------------------
+
+  offset[0] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +0.0000000000000000e+00}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+  offset[1] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +5.0000000000000000e-01}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+
+
+RS Correlation Functions
+------------------------
+
+... finalizing dataio
+
+
+OK: All 197 PSDdummy are zero
+
+Maximum memory usage (rank 0): 8.61 MB (8.61 by SFCF, 0.00 by openQCD)
+Current memory usage (rank 0): 8.58 MB (8.58 by SFCF, 0.00 by openQCD)
+
+Total execution time with solver -1 (CG):  2.11e+00 sec
+
+   section                       count  avg sec   tot sec   rel cost
+   -----------------------------------------------------------------
+   main                              1  8.18e-04  8.18e-04     0.0 %
+   reading input                     1  1.81e+00  1.81e+00    86.0 %
+   IO config                         1  7.10e-04  7.10e-04     0.0 %
+   IO data                           2  2.91e-03  5.82e-03     0.3 %
+   mem alloc                         2  1.34e-03  2.68e-03     0.1 %
+   solver (sfcf only)               60  4.50e-03  2.70e-01    12.8 %
+   rr correlators                    1  1.52e-02  1.52e-02     0.7 %
+   rs correlators                    1  9.54e-07  9.54e-07     0.0 %
+
+End.
+Build info
+----------
+Global lattice: 4 x 4 x 4 x 4
+Local lattice:  4 x 4 x 4 x 4 (u: 320+0 s: 192+0)
+Using single MPI process
+SFCF version: 2.1
+Using geometry 2 (boundary spinors mapped to dummy, u_ipt != s_ipt)
+Using solvers from openQCD
+Using dfl_update in DFL_SAP_GCR solver from openQCD
+Using oqcd_utils2.c from SFCF
+Using profiler functions also in openQCD interface
+Using SSE3
+Using prefetch PM
+Using prefetch P4
+
+Initialization
+--------------
+... initializing geometry
+... allocating gauge field
+... using unit gauge field
+Gauge field checked (184320 B, unused links: 64 zero, 1216 unity, BF0)
+Gauge checksum (MD5): 1ea28326e4090996111a320b8372811d
+... reading input file ('sfcf_unity_test.in')
+... finished reading input file (without hash) [input.c]
+
+Basic parameters:
+   Nf     = 3
+   beta   = 3.552200000000
+   ct     = 1.055185744046  (input)
+   cttilde= 0.974579134058  (input)
+   csw    = 1.822845956831  (input)
+   isw    = 0
+
+WARNING: The improvement coefficients have been calculated according to old
+         formulae, which were used in past simulations. If you do not need
+         compatibility to old simulations, you can use the newest formulae by
+         defining the preprocessor flag USE_LATEST_IMPROVEMENT.
+
+
+Solver parameters:
+   errsq = 1.000000e-18
+   nmax  = 4096
+
+   oqcd_solver_select = -1
+   oqcd_solver_param = 0xf04
+
+   [Solver 0]
+      solver = DFL_SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 1]
+      solver = CGNE
+      nmx    = 4096
+      res    = 1.000000e-10
+   [Solver 2]
+      solver = SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 3]
+      solver = CGNE_NO_EO
+      nkv    = 0
+      isolv  = 0
+      nmr    = 0
+      ncy    = 0
+      nmx    = 4096
+      res    = 1.000000e-10
+   [SAP]
+      bs     = 4 4 4 4
+   [[Deflation subspace]
+      bs     = 4 4 4 4
+      Ns     = 20
+   [[Deflation subspace generation]
+      kappa  = 1.371379e-01
+      mu     = 0.000000e+00
+      ninv   = 10
+      nmr    = 4
+      ncy    = 5
+   [[Deflation projection]
+      nkv     = 18
+      nmx     = 2048
+      res     = 1.000000e-02
+
+Source offsets: 2
+   offsets[0] = (0.0000000000000000e+00,0.0000000000000000e+00,0.0000000000000000e+00) = (0,0,0) sites
+WARNING in safe_ftoi [utils.c]: Fractional part exceeds tolerance (|0.5|>1e-06).   offsets[1] = (0.0000000000000000e+00,0.0000000000000000e+00,5.0000000000000000e-01) = (0,0,0) sites
+
+Wave-function parameters:
+   sigma type = delta
+   Wave-function basis:
+     element #0:  n_H = 0.000000000000  r_H = 2.666666666667
+     element #1:  n_H = 1.000000000000  r_H = 2.666666666667
+     element #2:  n_H = 0.000000000000  r_H = 5.333333333333
+   Wave-function coefficients:
+     element #0:  coeff = { 1.000000000000, 0.000000000000, 0.000000000000,}
+     element #1:  coeff = { 0.000000000000, 1.000000000000, 0.000000000000,}
+     element #2:  coeff = { 0.000000000000, 0.000000000000, 1.000000000000,}
+
+Relativistic quarks:
+   rel. quark #0: name = 'lquark' kappa = 0.137137900000   theta  = 0.500000000000  0.500000000000   0.500000000000  persistent
+
+Measurements for rr: 1
+   mrr[0] = (0, 0)
+
+Correlators for rr: 3
+   crr[0] = 'f_A'
+   crr[1] = 'f_1'
+   crr[2] = 'F_V0'
+
+Static actions (`smearings'):
+
+Static quarks:
+
+Measurements for rs: 0
+
+Correlators for rs: 0
+
+... allocating rprop (32 blocks)
+... initializing dataio (a=0 f=0 b=0 c=0 dname='./output_10519905/data_a' p=0 pname='./output_10519905/parameters_a')
+... creating data file './output_10519905/data_af_A' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7, param_md5 = d881e90d41188a33b8b0f1bd0bc53ea5)
+... creating data file './output_10519905/data_af_1' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7, param_md5 = d881e90d41188a33b8b0f1bd0bc53ea5)
+... creating data file './output_10519905/data_aF_V0' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7, param_md5 = d881e90d41188a33b8b0f1bd0bc53ea5)
+
+Plaquette:
+
+  sum:          4.09557397714092622e+03
+  sum (time):   2.36757397714092622e+03
+  sum (space):  1.72800000000000000e+03
+  sum (avg.):   1.01576735544169794e+00
+  dS/deta:      0.00000000000000000e+00
+  vbar:         0.00000000000000000e+00
+
+
+
+RR Correlation Functions
+------------------------
+
+  offset[0] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +0.0000000000000000e+00}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+  offset[1] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +5.0000000000000000e-01}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+
+
+RS Correlation Functions
+------------------------
+
+... finalizing dataio
+
+
+OK: All 197 PSDdummy are zero
+
+Maximum memory usage (rank 0): 8.61 MB (8.61 by SFCF, 0.00 by openQCD)
+Current memory usage (rank 0): 8.58 MB (8.58 by SFCF, 0.00 by openQCD)
+
+Total execution time with solver -1 (CG):  2.10e+00 sec
+
+   section                       count  avg sec   tot sec   rel cost
+   -----------------------------------------------------------------
+   main                              1  7.49e-04  7.49e-04     0.0 %
+   reading input                     1  1.81e+00  1.81e+00    85.9 %
+   IO config                         1  6.98e-04  6.98e-04     0.0 %
+   IO data                           2  3.40e-03  6.79e-03     0.3 %
+   mem alloc                         2  1.30e-03  2.60e-03     0.1 %
+   solver (sfcf only)               60  4.52e-03  2.71e-01    12.9 %
+   rr correlators                    1  1.51e-02  1.51e-02     0.7 %
+   rs correlators                    1  0.00e+00  0.00e+00     0.0 %
+
+End.
+Build info
+----------
+Global lattice: 4 x 4 x 4 x 4
+Local lattice:  4 x 4 x 4 x 4 (u: 320+0 s: 192+0)
+Using single MPI process
+SFCF version: 2.1
+Using geometry 2 (boundary spinors mapped to dummy, u_ipt != s_ipt)
+Using solvers from openQCD
+Using dfl_update in DFL_SAP_GCR solver from openQCD
+Using oqcd_utils2.c from SFCF
+Using profiler functions also in openQCD interface
+Using SSE3
+Using prefetch PM
+Using prefetch P4
+
+Initialization
+--------------
+... initializing geometry
+... allocating gauge field
+... using unit gauge field
+Gauge field checked (184320 B, unused links: 64 zero, 1216 unity, BF0)
+Gauge checksum (MD5): 1ea28326e4090996111a320b8372811d
+... reading input file ('sfcf_unity_test.in')
+... finished reading input file (without hash) [input.c]
+
+Basic parameters:
+   Nf     = 3
+   beta   = 3.552200000000
+   ct     = 1.055185744046  (input)
+   cttilde= 0.974579134058  (input)
+   csw    = 1.822845956831  (input)
+   isw    = 0
+
+WARNING: The improvement coefficients have been calculated according to old
+         formulae, which were used in past simulations. If you do not need
+         compatibility to old simulations, you can use the newest formulae by
+         defining the preprocessor flag USE_LATEST_IMPROVEMENT.
+
+
+Solver parameters:
+   errsq = 1.000000e-18
+   nmax  = 4096
+
+   oqcd_solver_select = -1
+   oqcd_solver_param = 0xf04
+
+   [Solver 0]
+      solver = DFL_SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 1]
+      solver = CGNE
+      nmx    = 4096
+      res    = 1.000000e-10
+   [Solver 2]
+      solver = SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 3]
+      solver = CGNE_NO_EO
+      nkv    = 0
+      isolv  = 0
+      nmr    = 0
+      ncy    = 0
+      nmx    = 4096
+      res    = 1.000000e-10
+   [SAP]
+      bs     = 4 4 4 4
+   [[Deflation subspace]
+      bs     = 4 4 4 4
+      Ns     = 20
+   [[Deflation subspace generation]
+      kappa  = 1.371379e-01
+      mu     = 0.000000e+00
+      ninv   = 10
+      nmr    = 4
+      ncy    = 5
+   [[Deflation projection]
+      nkv     = 18
+      nmx     = 2048
+      res     = 1.000000e-02
+
+Source offsets: 2
+   offsets[0] = (0.0000000000000000e+00,0.0000000000000000e+00,0.0000000000000000e+00) = (0,0,0) sites
+WARNING in safe_ftoi [utils.c]: Fractional part exceeds tolerance (|0.5|>1e-06).   offsets[1] = (0.0000000000000000e+00,0.0000000000000000e+00,5.0000000000000000e-01) = (0,0,0) sites
+
+Wave-function parameters:
+   sigma type = delta
+   Wave-function basis:
+     element #0:  n_H = 0.000000000000  r_H = 2.666666666667
+     element #1:  n_H = 1.000000000000  r_H = 2.666666666667
+     element #2:  n_H = 0.000000000000  r_H = 5.333333333333
+   Wave-function coefficients:
+     element #0:  coeff = { 1.000000000000, 0.000000000000, 0.000000000000,}
+     element #1:  coeff = { 0.000000000000, 1.000000000000, 0.000000000000,}
+     element #2:  coeff = { 0.000000000000, 0.000000000000, 1.000000000000,}
+
+Relativistic quarks:
+   rel. quark #0: name = 'lquark' kappa = 0.137137900000   theta  = 0.500000000000  0.500000000000   0.500000000000  persistent
+
+Measurements for rr: 1
+   mrr[0] = (0, 0)
+
+Correlators for rr: 3
+   crr[0] = 'f_A'
+   crr[1] = 'f_1'
+   crr[2] = 'F_V0'
+
+Static actions (`smearings'):
+
+Static quarks:
+
+Measurements for rs: 0
+
+Correlators for rs: 0
+
+... allocating rprop (32 blocks)
+... initializing dataio (a=1 f=0 b=0 c=0 dname='./output_10519905/data_a' p=0 pname='./output_10519905/parameters_a')
+... checking data file './output_10519905/data_af_A' [dataio.c]
+... skipped 1 run records [dataio.c]
+... skipped 6 correlator records [dataio.c]
+... appending to data file './output_10519905/data_af_A' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+... checking data file './output_10519905/data_af_1' [dataio.c]
+... skipped 1 run records [dataio.c]
+... skipped 18 correlator records [dataio.c]
+... appending to data file './output_10519905/data_af_1' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+... checking data file './output_10519905/data_aF_V0' [dataio.c]
+... skipped 1 run records [dataio.c]
+... skipped 18 correlator records [dataio.c]
+... appending to data file './output_10519905/data_aF_V0' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+
+Plaquette:
+
+  sum:          4.09557397714092622e+03
+  sum (time):   2.36757397714092622e+03
+  sum (space):  1.72800000000000000e+03
+  sum (avg.):   1.01576735544169794e+00
+  dS/deta:      0.00000000000000000e+00
+  vbar:         0.00000000000000000e+00
+
+
+
+RR Correlation Functions
+------------------------
+
+  offset[0] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +0.0000000000000000e+00}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+  offset[1] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +5.0000000000000000e-01}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+
+
+RS Correlation Functions
+------------------------
+
+... finalizing dataio
+
+
+OK: All 197 PSDdummy are zero
+
+Maximum memory usage (rank 0): 8.61 MB (8.61 by SFCF, 0.00 by openQCD)
+Current memory usage (rank 0): 8.58 MB (8.58 by SFCF, 0.00 by openQCD)
+
+Total execution time with solver -1 (CG):  2.11e+00 sec
+
+   section                       count  avg sec   tot sec   rel cost
+   -----------------------------------------------------------------
+   main                              1  7.90e-04  7.90e-04     0.0 %
+   reading input                     1  1.81e+00  1.81e+00    85.8 %
+   IO config                         1  6.84e-04  6.84e-04     0.0 %
+   IO data                           2  2.45e-03  4.91e-03     0.2 %
+   mem alloc                         2  1.34e-03  2.68e-03     0.1 %
+   solver (sfcf only)               60  4.58e-03  2.75e-01    13.0 %
+   rr correlators                    1  1.53e-02  1.53e-02     0.7 %
+   rs correlators                    1  1.19e-06  1.19e-06     0.0 %
+
+End.
+Build info
+----------
+Global lattice: 4 x 4 x 4 x 4
+Local lattice:  4 x 4 x 4 x 4 (u: 320+0 s: 192+0)
+Using single MPI process
+SFCF version: 2.1
+Using geometry 2 (boundary spinors mapped to dummy, u_ipt != s_ipt)
+Using solvers from openQCD
+Using dfl_update in DFL_SAP_GCR solver from openQCD
+Using oqcd_utils2.c from SFCF
+Using profiler functions also in openQCD interface
+Using SSE3
+Using prefetch PM
+Using prefetch P4
+
+Initialization
+--------------
+... initializing geometry
+... allocating gauge field
+... using unit gauge field
+Gauge field checked (184320 B, unused links: 64 zero, 1216 unity, BF0)
+Gauge checksum (MD5): 1ea28326e4090996111a320b8372811d
+... reading input file ('sfcf_unity_test.in')
+... finished reading input file (without hash) [input.c]
+
+Basic parameters:
+   Nf     = 3
+   beta   = 3.552200000000
+   ct     = 1.055185744046  (input)
+   cttilde= 0.974579134058  (input)
+   csw    = 1.822845956831  (input)
+   isw    = 0
+
+WARNING: The improvement coefficients have been calculated according to old
+         formulae, which were used in past simulations. If you do not need
+         compatibility to old simulations, you can use the newest formulae by
+         defining the preprocessor flag USE_LATEST_IMPROVEMENT.
+
+
+Solver parameters:
+   errsq = 1.000000e-18
+   nmax  = 4096
+
+   oqcd_solver_select = -1
+   oqcd_solver_param = 0xf04
+
+   [Solver 0]
+      solver = DFL_SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 1]
+      solver = CGNE
+      nmx    = 4096
+      res    = 1.000000e-10
+   [Solver 2]
+      solver = SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 3]
+      solver = CGNE_NO_EO
+      nkv    = 0
+      isolv  = 0
+      nmr    = 0
+      ncy    = 0
+      nmx    = 4096
+      res    = 1.000000e-10
+   [SAP]
+      bs     = 4 4 4 4
+   [[Deflation subspace]
+      bs     = 4 4 4 4
+      Ns     = 20
+   [[Deflation subspace generation]
+      kappa  = 1.371379e-01
+      mu     = 0.000000e+00
+      ninv   = 10
+      nmr    = 4
+      ncy    = 5
+   [[Deflation projection]
+      nkv     = 18
+      nmx     = 2048
+      res     = 1.000000e-02
+
+Source offsets: 2
+   offsets[0] = (0.0000000000000000e+00,0.0000000000000000e+00,0.0000000000000000e+00) = (0,0,0) sites
+WARNING in safe_ftoi [utils.c]: Fractional part exceeds tolerance (|0.5|>1e-06).   offsets[1] = (0.0000000000000000e+00,0.0000000000000000e+00,5.0000000000000000e-01) = (0,0,0) sites
+
+Wave-function parameters:
+   sigma type = delta
+   Wave-function basis:
+     element #0:  n_H = 0.000000000000  r_H = 2.666666666667
+     element #1:  n_H = 1.000000000000  r_H = 2.666666666667
+     element #2:  n_H = 0.000000000000  r_H = 5.333333333333
+   Wave-function coefficients:
+     element #0:  coeff = { 1.000000000000, 0.000000000000, 0.000000000000,}
+     element #1:  coeff = { 0.000000000000, 1.000000000000, 0.000000000000,}
+     element #2:  coeff = { 0.000000000000, 0.000000000000, 1.000000000000,}
+
+Relativistic quarks:
+   rel. quark #0: name = 'lquark' kappa = 0.137137900000   theta  = 0.500000000000  0.500000000000   0.500000000000  persistent
+
+Measurements for rr: 1
+   mrr[0] = (0, 0)
+
+Correlators for rr: 3
+   crr[0] = 'f_A'
+   crr[1] = 'f_1'
+   crr[2] = 'F_V0'
+
+Static actions (`smearings'):
+
+Static quarks:
+
+Measurements for rs: 0
+
+Correlators for rs: 0
+
+... allocating rprop (32 blocks)
+... initializing dataio (a=1 f=0 b=0 c=0 dname='./output_10519905/data_a' p=0 pname='./output_10519905/parameters_a')
+... checking data file './output_10519905/data_af_A' [dataio.c]
+... skipped 2 run records [dataio.c]
+... skipped 12 correlator records [dataio.c]
+... appending to data file './output_10519905/data_af_A' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+... checking data file './output_10519905/data_af_1' [dataio.c]
+... skipped 2 run records [dataio.c]
+... skipped 36 correlator records [dataio.c]
+... appending to data file './output_10519905/data_af_1' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+... checking data file './output_10519905/data_aF_V0' [dataio.c]
+... skipped 2 run records [dataio.c]
+... skipped 36 correlator records [dataio.c]
+... appending to data file './output_10519905/data_aF_V0' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+
+Plaquette:
+
+  sum:          4.09557397714092622e+03
+  sum (time):   2.36757397714092622e+03
+  sum (space):  1.72800000000000000e+03
+  sum (avg.):   1.01576735544169794e+00
+  dS/deta:      0.00000000000000000e+00
+  vbar:         0.00000000000000000e+00
+
+
+
+RR Correlation Functions
+------------------------
+
+  offset[0] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +0.0000000000000000e+00}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+  offset[1] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +5.0000000000000000e-01}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+
+
+RS Correlation Functions
+------------------------
+
+... finalizing dataio
+
+
+OK: All 197 PSDdummy are zero
+
+Maximum memory usage (rank 0): 8.61 MB (8.61 by SFCF, 0.00 by openQCD)
+Current memory usage (rank 0): 8.58 MB (8.58 by SFCF, 0.00 by openQCD)
+
+Total execution time with solver -1 (CG):  2.11e+00 sec
+
+   section                       count  avg sec   tot sec   rel cost
+   -----------------------------------------------------------------
+   main                              1  8.06e-04  8.06e-04     0.0 %
+   reading input                     1  1.81e+00  1.81e+00    85.8 %
+   IO config                         1  7.46e-04  7.46e-04     0.0 %
+   IO data                           2  2.60e-03  5.20e-03     0.2 %
+   mem alloc                         2  1.33e-03  2.66e-03     0.1 %
+   solver (sfcf only)               60  4.57e-03  2.74e-01    13.0 %
+   rr correlators                    1  1.60e-02  1.60e-02     0.8 %
+   rs correlators                    1  0.00e+00  0.00e+00     0.0 %
+
+End.
+Build info
+----------
+Global lattice: 4 x 4 x 4 x 4
+Local lattice:  4 x 4 x 4 x 4 (u: 320+0 s: 192+0)
+Using single MPI process
+SFCF version: 2.1
+Using geometry 2 (boundary spinors mapped to dummy, u_ipt != s_ipt)
+Using solvers from openQCD
+Using dfl_update in DFL_SAP_GCR solver from openQCD
+Using oqcd_utils2.c from SFCF
+Using profiler functions also in openQCD interface
+Using SSE3
+Using prefetch PM
+Using prefetch P4
+
+Initialization
+--------------
+... initializing geometry
+... allocating gauge field
+... using unit gauge field
+Gauge field checked (184320 B, unused links: 64 zero, 1216 unity, BF0)
+Gauge checksum (MD5): 1ea28326e4090996111a320b8372811d
+... reading input file ('sfcf_unity_test.in')
+... finished reading input file (without hash) [input.c]
+
+Basic parameters:
+   Nf     = 3
+   beta   = 3.552200000000
+   ct     = 1.055185744046  (input)
+   cttilde= 0.974579134058  (input)
+   csw    = 1.822845956831  (input)
+   isw    = 0
+
+WARNING: The improvement coefficients have been calculated according to old
+         formulae, which were used in past simulations. If you do not need
+         compatibility to old simulations, you can use the newest formulae by
+         defining the preprocessor flag USE_LATEST_IMPROVEMENT.
+
+
+Solver parameters:
+   errsq = 1.000000e-18
+   nmax  = 4096
+
+   oqcd_solver_select = -1
+   oqcd_solver_param = 0xf04
+
+   [Solver 0]
+      solver = DFL_SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 1]
+      solver = CGNE
+      nmx    = 4096
+      res    = 1.000000e-10
+   [Solver 2]
+      solver = SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 3]
+      solver = CGNE_NO_EO
+      nkv    = 0
+      isolv  = 0
+      nmr    = 0
+      ncy    = 0
+      nmx    = 4096
+      res    = 1.000000e-10
+   [SAP]
+      bs     = 4 4 4 4
+   [[Deflation subspace]
+      bs     = 4 4 4 4
+      Ns     = 20
+   [[Deflation subspace generation]
+      kappa  = 1.371379e-01
+      mu     = 0.000000e+00
+      ninv   = 10
+      nmr    = 4
+      ncy    = 5
+   [[Deflation projection]
+      nkv     = 18
+      nmx     = 2048
+      res     = 1.000000e-02
+
+Source offsets: 2
+   offsets[0] = (0.0000000000000000e+00,0.0000000000000000e+00,0.0000000000000000e+00) = (0,0,0) sites
+WARNING in safe_ftoi [utils.c]: Fractional part exceeds tolerance (|0.5|>1e-06).   offsets[1] = (0.0000000000000000e+00,0.0000000000000000e+00,5.0000000000000000e-01) = (0,0,0) sites
+
+Wave-function parameters:
+   sigma type = delta
+   Wave-function basis:
+     element #0:  n_H = 0.000000000000  r_H = 2.666666666667
+     element #1:  n_H = 1.000000000000  r_H = 2.666666666667
+     element #2:  n_H = 0.000000000000  r_H = 5.333333333333
+   Wave-function coefficients:
+     element #0:  coeff = { 1.000000000000, 0.000000000000, 0.000000000000,}
+     element #1:  coeff = { 0.000000000000, 1.000000000000, 0.000000000000,}
+     element #2:  coeff = { 0.000000000000, 0.000000000000, 1.000000000000,}
+
+Relativistic quarks:
+   rel. quark #0: name = 'lquark' kappa = 0.137137900000   theta  = 0.500000000000  0.500000000000   0.500000000000  persistent
+
+Measurements for rr: 1
+   mrr[0] = (0, 0)
+
+Correlators for rr: 3
+   crr[0] = 'f_A'
+   crr[1] = 'f_1'
+   crr[2] = 'F_V0'
+
+Static actions (`smearings'):
+
+Static quarks:
+
+Measurements for rs: 0
+
+Correlators for rs: 0
+
+... allocating rprop (32 blocks)
+... initializing dataio (a=1 f=0 b=0 c=0 dname='./output_10519905/data_a' p=0 pname='./output_10519905/parameters_a')
+... checking data file './output_10519905/data_af_A' [dataio.c]
+... skipped 3 run records [dataio.c]
+... skipped 18 correlator records [dataio.c]
+... appending to data file './output_10519905/data_af_A' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+... checking data file './output_10519905/data_af_1' [dataio.c]
+... skipped 3 run records [dataio.c]
+... skipped 54 correlator records [dataio.c]
+... appending to data file './output_10519905/data_af_1' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+... checking data file './output_10519905/data_aF_V0' [dataio.c]
+... skipped 3 run records [dataio.c]
+... skipped 54 correlator records [dataio.c]
+... appending to data file './output_10519905/data_aF_V0' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+
+Plaquette:
+
+  sum:          4.09557397714092622e+03
+  sum (time):   2.36757397714092622e+03
+  sum (space):  1.72800000000000000e+03
+  sum (avg.):   1.01576735544169794e+00
+  dS/deta:      0.00000000000000000e+00
+  vbar:         0.00000000000000000e+00
+
+
+
+RR Correlation Functions
+------------------------
+
+  offset[0] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +0.0000000000000000e+00}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+  offset[1] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +5.0000000000000000e-01}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+
+
+RS Correlation Functions
+------------------------
+
+... finalizing dataio
+
+
+OK: All 197 PSDdummy are zero
+
+Maximum memory usage (rank 0): 8.61 MB (8.61 by SFCF, 0.00 by openQCD)
+Current memory usage (rank 0): 8.58 MB (8.58 by SFCF, 0.00 by openQCD)
+
+Total execution time with solver -1 (CG):  2.11e+00 sec
+
+   section                       count  avg sec   tot sec   rel cost
+   -----------------------------------------------------------------
+   main                              1  8.31e-04  8.31e-04     0.0 %
+   reading input                     1  1.81e+00  1.81e+00    85.9 %
+   IO config                         1  9.42e-04  9.42e-04     0.0 %
+   IO data                           2  1.73e-03  3.45e-03     0.2 %
+   mem alloc                         2  1.62e-03  3.24e-03     0.2 %
+   solver (sfcf only)               60  4.54e-03  2.72e-01    12.9 %
+   rr correlators                    1  1.52e-02  1.52e-02     0.7 %
+   rs correlators                    1  0.00e+00  0.00e+00     0.0 %
+
+End.
+Build info
+----------
+Global lattice: 4 x 4 x 4 x 4
+Local lattice:  4 x 4 x 4 x 4 (u: 320+0 s: 192+0)
+Using single MPI process
+SFCF version: 2.1
+Using geometry 2 (boundary spinors mapped to dummy, u_ipt != s_ipt)
+Using solvers from openQCD
+Using dfl_update in DFL_SAP_GCR solver from openQCD
+Using oqcd_utils2.c from SFCF
+Using profiler functions also in openQCD interface
+Using SSE3
+Using prefetch PM
+Using prefetch P4
+
+Initialization
+--------------
+... initializing geometry
+... allocating gauge field
+... using unit gauge field
+Gauge field checked (184320 B, unused links: 64 zero, 1216 unity, BF0)
+Gauge checksum (MD5): 1ea28326e4090996111a320b8372811d
+... reading input file ('sfcf_unity_test.in')
+... finished reading input file (without hash) [input.c]
+
+Basic parameters:
+   Nf     = 3
+   beta   = 3.552200000000
+   ct     = 1.055185744046  (input)
+   cttilde= 0.974579134058  (input)
+   csw    = 1.822845956831  (input)
+   isw    = 0
+
+WARNING: The improvement coefficients have been calculated according to old
+         formulae, which were used in past simulations. If you do not need
+         compatibility to old simulations, you can use the newest formulae by
+         defining the preprocessor flag USE_LATEST_IMPROVEMENT.
+
+
+Solver parameters:
+   errsq = 1.000000e-18
+   nmax  = 4096
+
+   oqcd_solver_select = -1
+   oqcd_solver_param = 0xf04
+
+   [Solver 0]
+      solver = DFL_SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 1]
+      solver = CGNE
+      nmx    = 4096
+      res    = 1.000000e-10
+   [Solver 2]
+      solver = SAP_GCR
+      nkv    = 24
+      isolv  = 1
+      nmr    = 4
+      ncy    = 5
+      nmx    = 2048
+      res    = 1.000000e-10
+   [Solver 3]
+      solver = CGNE_NO_EO
+      nkv    = 0
+      isolv  = 0
+      nmr    = 0
+      ncy    = 0
+      nmx    = 4096
+      res    = 1.000000e-10
+   [SAP]
+      bs     = 4 4 4 4
+   [[Deflation subspace]
+      bs     = 4 4 4 4
+      Ns     = 20
+   [[Deflation subspace generation]
+      kappa  = 1.371379e-01
+      mu     = 0.000000e+00
+      ninv   = 10
+      nmr    = 4
+      ncy    = 5
+   [[Deflation projection]
+      nkv     = 18
+      nmx     = 2048
+      res     = 1.000000e-02
+
+Source offsets: 2
+   offsets[0] = (0.0000000000000000e+00,0.0000000000000000e+00,0.0000000000000000e+00) = (0,0,0) sites
+WARNING in safe_ftoi [utils.c]: Fractional part exceeds tolerance (|0.5|>1e-06).   offsets[1] = (0.0000000000000000e+00,0.0000000000000000e+00,5.0000000000000000e-01) = (0,0,0) sites
+
+Wave-function parameters:
+   sigma type = delta
+   Wave-function basis:
+     element #0:  n_H = 0.000000000000  r_H = 2.666666666667
+     element #1:  n_H = 1.000000000000  r_H = 2.666666666667
+     element #2:  n_H = 0.000000000000  r_H = 5.333333333333
+   Wave-function coefficients:
+     element #0:  coeff = { 1.000000000000, 0.000000000000, 0.000000000000,}
+     element #1:  coeff = { 0.000000000000, 1.000000000000, 0.000000000000,}
+     element #2:  coeff = { 0.000000000000, 0.000000000000, 1.000000000000,}
+
+Relativistic quarks:
+   rel. quark #0: name = 'lquark' kappa = 0.137137900000   theta  = 0.500000000000  0.500000000000   0.500000000000  persistent
+
+Measurements for rr: 1
+   mrr[0] = (0, 0)
+
+Correlators for rr: 3
+   crr[0] = 'f_A'
+   crr[1] = 'f_1'
+   crr[2] = 'F_V0'
+
+Static actions (`smearings'):
+
+Static quarks:
+
+Measurements for rs: 0
+
+Correlators for rs: 0
+
+... allocating rprop (32 blocks)
+... initializing dataio (a=1 f=0 b=0 c=0 dname='./output_10519905/data_a' p=0 pname='./output_10519905/parameters_a')
+... checking data file './output_10519905/data_af_A' [dataio.c]
+... skipped 4 run records [dataio.c]
+... skipped 24 correlator records [dataio.c]
+... appending to data file './output_10519905/data_af_A' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+... checking data file './output_10519905/data_af_1' [dataio.c]
+... skipped 4 run records [dataio.c]
+... skipped 72 correlator records [dataio.c]
+... appending to data file './output_10519905/data_af_1' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+... checking data file './output_10519905/data_aF_V0' [dataio.c]
+... skipped 4 run records [dataio.c]
+... skipped 72 correlator records [dataio.c]
+... appending to data file './output_10519905/data_aF_V0' [dataio.c]
+... wrote run record (param_hash = 686af5e712ee2902180f5428af94c6e7)
+
+Plaquette:
+
+  sum:          4.09557397714092622e+03
+  sum (time):   2.36757397714092622e+03
+  sum (space):  1.72800000000000000e+03
+  sum (avg.):   1.01576735544169794e+00
+  dS/deta:      0.00000000000000000e+00
+  vbar:         0.00000000000000000e+00
+
+
+
+RR Correlation Functions
+------------------------
+
+  offset[0] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +0.0000000000000000e+00}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.335827e-10
+          True residue:     |r_n|/|v| = 8.335828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.534512e-10
+          True residue:     |r_n|/|v| = 8.534511e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802722e-10
+          True residue:     |r_n|/|v| = 8.802722e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.802562e-10
+          True residue:     |r_n|/|v| = 8.802562e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.801999e-10
+          True residue:     |r_n|/|v| = 8.801999e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796995e-10
+          True residue:     |r_n|/|v| = 8.796995e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.684873e-10
+          True residue:     |r_n|/|v| = 6.684873e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.682003e-10
+          True residue:     |r_n|/|v| = 6.682002e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021740e-10
+          True residue:     |r_n|/|v| = 6.021742e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021726e-10
+          True residue:     |r_n|/|v| = 6.021726e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+  offset[1] == {+0.0000000000000000e+00, +0.0000000000000000e+00, +5.0000000000000000e-01}
+    computing correlations between rel. quark 0 and rel. quark 0...
+      wave function: 0
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 9.352828e-10
+          True residue:     |r_n|/|v| = 9.352828e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 42 iterations
+          Iterated residue: |r_n|/|v| = 8.277678e-10
+          True residue:     |r_n|/|v| = 8.277678e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.800192e-10
+          True residue:     |r_n|/|v| = 8.800192e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.804954e-10
+          True residue:     |r_n|/|v| = 8.804953e-10
+        computing f_1 ...
+        computing F_V0 ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.806137e-10
+          True residue:     |r_n|/|v| = 8.806137e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 48 iterations
+          Iterated residue: |r_n|/|v| = 8.796464e-10
+          True residue:     |r_n|/|v| = 8.796464e-10
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 1
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.689213e-10
+          True residue:     |r_n|/|v| = 6.689212e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 41 iterations
+          Iterated residue: |r_n|/|v| = 6.695514e-10
+          True residue:     |r_n|/|v| = 6.695515e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+      wave function: 2
+        computing f_A ...
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021731e-10
+          True residue:     |r_n|/|v| = 6.021731e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+... start SFCF solver CG: iv=-1 ix=196 [solver.c]
+          CG converged after 39 iterations
+          Iterated residue: |r_n|/|v| = 6.021729e-10
+          True residue:     |r_n|/|v| = 6.021727e-10
+        computing f_1 ...
+        computing F_V0 ...
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+        INFO from crr_bib [crr_contractions.c]: This routine is only exact for flat wave functions.
+
+
+RS Correlation Functions
+------------------------
+
+... finalizing dataio
+
+
+OK: All 197 PSDdummy are zero
+
+Maximum memory usage (rank 0): 8.61 MB (8.61 by SFCF, 0.00 by openQCD)
+Current memory usage (rank 0): 8.58 MB (8.58 by SFCF, 0.00 by openQCD)
+
+Total execution time with solver -1 (CG):  2.11e+00 sec
+
+   section                       count  avg sec   tot sec   rel cost
+   -----------------------------------------------------------------
+   main                              1  7.94e-04  7.94e-04     0.0 %
+   reading input                     1  1.81e+00  1.81e+00    86.0 %
+   IO config                         1  7.78e-04  7.78e-04     0.0 %
+   IO data                           2  2.04e-03  4.08e-03     0.2 %
+   mem alloc                         2  1.56e-03  3.13e-03     0.1 %
+   solver (sfcf only)               60  4.50e-03  2.70e-01    12.8 %
+   rr correlators                    1  1.54e-02  1.54e-02     0.7 %
+   rs correlators                    1  0.00e+00  0.00e+00     0.0 %
+
+End.
diff --git a/tests/data/sfcf_test/param/parameters_a b/tests/data/sfcf_test/param/parameters_a
new file mode 100644
index 00000000..8e573616
--- /dev/null
+++ b/tests/data/sfcf_test/param/parameters_a
@@ -0,0 +1,102 @@
+
+tsize	4
+l1	4
+l2	4
+l3	4
+nf	3
+beta	+3.5522000000000000e+00
+ct	+1.0551857440459433e+00
+cttilde	+9.7457913405776697e-01
+csw	+1.8228459568314139e+00
+isw	0
+errsq	+1.0000000000000001e-18
+nmax	4096
+oqcd_solver_select	-1
+oqcd_solver_param	3844
+
+[Solver 0]
+solver	DFL_SAP_GCR
+nkv	24
+isolv	1
+nmr	4
+ncy	5
+nmx	2048
+res	+1.0000000000000000e-10
+istop	0
+
+[Solver 1]
+solver	CGNE
+nkv	0
+isolv	0
+nmr	0
+ncy	0
+nmx	4096
+res	+1.0000000000000000e-10
+istop	0
+
+[Solver 2]
+solver	SAP_GCR
+nkv	24
+isolv	1
+nmr	4
+ncy	5
+nmx	2048
+res	+1.0000000000000000e-10
+istop	0
+
+[Solver 3]
+solver	CGNE_NO_EO
+nkv	0
+isolv	0
+nmr	0
+ncy	0
+nmx	4096
+res	+1.0000000000000000e-10
+istop	0
+
+[SAP]
+bs	4 4 4 4
+
+[Deflation subspace]
+bs	4 4 4 4
+Ns	20
+
+[Deflation subspace generation]
+kappa	+1.3713790000000001e-01
+mu	+0.0000000000000000e+00
+ninv	10
+nmr	4
+ncy	5
+
+[Deflation projection]
+nkv	18
+nmx	2048
+res	+1.0000000000000000e-02
+
+wf_offsets	2
+  +0.0000000000000000e+00	+0.0000000000000000e+00	+0.0000000000000000e+00
+  +0.0000000000000000e+00	+0.0000000000000000e+00	+5.0000000000000000e-01
+wf_basis	3
+  +0.0000000000000000e+00	+2.6666666666666665e+00
+  +1.0000000000000000e+00	+2.6666666666666665e+00
+  +0.0000000000000000e+00	+5.3333333333333330e+00
+wf_coeff	3
+ +1.0000000000000000e+00 +0.0000000000000000e+00 +0.0000000000000000e+00
+ +0.0000000000000000e+00 +1.0000000000000000e+00 +0.0000000000000000e+00
+ +0.0000000000000000e+00 +0.0000000000000000e+00 +1.0000000000000000e+00
+
+qr	1
+  lquark	+1.3713790000000001e-01	+5.0000000000000000e-01	+5.0000000000000000e-01	+5.0000000000000000e-01	persistent
+mrr	1
+  lquark	lquark
+crr	3
+  f_A
+  f_1
+  F_V0
+
+sg	0
+qs	0
+mrs	0
+crs	0
+
+# param_hash 686af5e712ee2902180f5428af94c6e7
diff --git a/tests/data/sfcf_test/param/parameters_c b/tests/data/sfcf_test/param/parameters_c
new file mode 100644
index 00000000..8e573616
--- /dev/null
+++ b/tests/data/sfcf_test/param/parameters_c
@@ -0,0 +1,102 @@
+
+tsize	4
+l1	4
+l2	4
+l3	4
+nf	3
+beta	+3.5522000000000000e+00
+ct	+1.0551857440459433e+00
+cttilde	+9.7457913405776697e-01
+csw	+1.8228459568314139e+00
+isw	0
+errsq	+1.0000000000000001e-18
+nmax	4096
+oqcd_solver_select	-1
+oqcd_solver_param	3844
+
+[Solver 0]
+solver	DFL_SAP_GCR
+nkv	24
+isolv	1
+nmr	4
+ncy	5
+nmx	2048
+res	+1.0000000000000000e-10
+istop	0
+
+[Solver 1]
+solver	CGNE
+nkv	0
+isolv	0
+nmr	0
+ncy	0
+nmx	4096
+res	+1.0000000000000000e-10
+istop	0
+
+[Solver 2]
+solver	SAP_GCR
+nkv	24
+isolv	1
+nmr	4
+ncy	5
+nmx	2048
+res	+1.0000000000000000e-10
+istop	0
+
+[Solver 3]
+solver	CGNE_NO_EO
+nkv	0
+isolv	0
+nmr	0
+ncy	0
+nmx	4096
+res	+1.0000000000000000e-10
+istop	0
+
+[SAP]
+bs	4 4 4 4
+
+[Deflation subspace]
+bs	4 4 4 4
+Ns	20
+
+[Deflation subspace generation]
+kappa	+1.3713790000000001e-01
+mu	+0.0000000000000000e+00
+ninv	10
+nmr	4
+ncy	5
+
+[Deflation projection]
+nkv	18
+nmx	2048
+res	+1.0000000000000000e-02
+
+wf_offsets	2
+  +0.0000000000000000e+00	+0.0000000000000000e+00	+0.0000000000000000e+00
+  +0.0000000000000000e+00	+0.0000000000000000e+00	+5.0000000000000000e-01
+wf_basis	3
+  +0.0000000000000000e+00	+2.6666666666666665e+00
+  +1.0000000000000000e+00	+2.6666666666666665e+00
+  +0.0000000000000000e+00	+5.3333333333333330e+00
+wf_coeff	3
+ +1.0000000000000000e+00 +0.0000000000000000e+00 +0.0000000000000000e+00
+ +0.0000000000000000e+00 +1.0000000000000000e+00 +0.0000000000000000e+00
+ +0.0000000000000000e+00 +0.0000000000000000e+00 +1.0000000000000000e+00
+
+qr	1
+  lquark	+1.3713790000000001e-01	+5.0000000000000000e-01	+5.0000000000000000e-01	+5.0000000000000000e-01	persistent
+mrr	1
+  lquark	lquark
+crr	3
+  f_A
+  f_1
+  F_V0
+
+sg	0
+qs	0
+mrs	0
+crs	0
+
+# param_hash 686af5e712ee2902180f5428af94c6e7
diff --git a/tests/data/sfcf_test/param/parameters_o b/tests/data/sfcf_test/param/parameters_o
new file mode 100644
index 00000000..8e573616
--- /dev/null
+++ b/tests/data/sfcf_test/param/parameters_o
@@ -0,0 +1,102 @@
+
+tsize	4
+l1	4
+l2	4
+l3	4
+nf	3
+beta	+3.5522000000000000e+00
+ct	+1.0551857440459433e+00
+cttilde	+9.7457913405776697e-01
+csw	+1.8228459568314139e+00
+isw	0
+errsq	+1.0000000000000001e-18
+nmax	4096
+oqcd_solver_select	-1
+oqcd_solver_param	3844
+
+[Solver 0]
+solver	DFL_SAP_GCR
+nkv	24
+isolv	1
+nmr	4
+ncy	5
+nmx	2048
+res	+1.0000000000000000e-10
+istop	0
+
+[Solver 1]
+solver	CGNE
+nkv	0
+isolv	0
+nmr	0
+ncy	0
+nmx	4096
+res	+1.0000000000000000e-10
+istop	0
+
+[Solver 2]
+solver	SAP_GCR
+nkv	24
+isolv	1
+nmr	4
+ncy	5
+nmx	2048
+res	+1.0000000000000000e-10
+istop	0
+
+[Solver 3]
+solver	CGNE_NO_EO
+nkv	0
+isolv	0
+nmr	0
+ncy	0
+nmx	4096
+res	+1.0000000000000000e-10
+istop	0
+
+[SAP]
+bs	4 4 4 4
+
+[Deflation subspace]
+bs	4 4 4 4
+Ns	20
+
+[Deflation subspace generation]
+kappa	+1.3713790000000001e-01
+mu	+0.0000000000000000e+00
+ninv	10
+nmr	4
+ncy	5
+
+[Deflation projection]
+nkv	18
+nmx	2048
+res	+1.0000000000000000e-02
+
+wf_offsets	2
+  +0.0000000000000000e+00	+0.0000000000000000e+00	+0.0000000000000000e+00
+  +0.0000000000000000e+00	+0.0000000000000000e+00	+5.0000000000000000e-01
+wf_basis	3
+  +0.0000000000000000e+00	+2.6666666666666665e+00
+  +1.0000000000000000e+00	+2.6666666666666665e+00
+  +0.0000000000000000e+00	+5.3333333333333330e+00
+wf_coeff	3
+ +1.0000000000000000e+00 +0.0000000000000000e+00 +0.0000000000000000e+00
+ +0.0000000000000000e+00 +1.0000000000000000e+00 +0.0000000000000000e+00
+ +0.0000000000000000e+00 +0.0000000000000000e+00 +1.0000000000000000e+00
+
+qr	1
+  lquark	+1.3713790000000001e-01	+5.0000000000000000e-01	+5.0000000000000000e-01	+5.0000000000000000e-01	persistent
+mrr	1
+  lquark	lquark
+crr	3
+  f_A
+  f_1
+  F_V0
+
+sg	0
+qs	0
+mrs	0
+crs	0
+
+# param_hash 686af5e712ee2902180f5428af94c6e7
diff --git a/tests/sfcf_in_test.py b/tests/sfcf_in_test.py
new file mode 100644
index 00000000..20a3e924
--- /dev/null
+++ b/tests/sfcf_in_test.py
@@ -0,0 +1,125 @@
+import os,sys,inspect
+current_dir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe())))
+parent_dir = os.path.dirname(current_dir)
+sys.path.insert(0, parent_dir)
+
+import pyerrors as pe
+import pyerrors.input.openQCD as qcdin
+import pyerrors.input.sfcf as sfin
+import shutil
+
+from time import sleep
+
+def build_test_environment(env_type, cfgs, reps):
+    if env_type == "o":
+        for i in range(2,cfgs+1):
+            shutil.copytree("tests/data/sfcf_test/data_o/test_r0/cfg1","tests/data/sfcf_test/data_o/test_r0/cfg"+str(i))
+        for i in range(1,reps):
+            shutil.copytree("tests/data/sfcf_test/data_o/test_r0", "tests/data/sfcf_test/data_o/test_r"+str(i))
+    elif env_type == "c":
+        for i in range(2,cfgs+1):
+            shutil.copy("tests/data/sfcf_test/data_c/data_c_r0/data_c_r0_n1","tests/data/sfcf_test/data_c/data_c_r0/data_c_r0_n"+str(i))
+        for i in range(1,reps):
+            os.mkdir("tests/data/sfcf_test/data_c/data_c_r"+str(i))
+            for j in range(1,cfgs+1):
+                shutil.copy("tests/data/sfcf_test/data_c/data_c_r0/data_c_r0_n1","tests/data/sfcf_test/data_c/data_c_r"+str(i)+"/data_c_r"+str(i)+"_n"+str(j))
+
+
+
+
+def clean_test_environment(env_type, cfgs, reps):
+    if env_type == "o":
+        for i in range(1,reps):
+            shutil.rmtree("tests/data/sfcf_test/data_o/test_r"+str(i))
+        for i in range(2,cfgs+1):
+            shutil.rmtree("tests/data/sfcf_test/data_o/test_r0/cfg"+str(i))
+    elif env_type == "c":
+        for i in range(1,reps):
+            shutil.rmtree("tests/data/sfcf_test/data_c/data_c_r"+str(i))
+        for i in range(2,cfgs+1):
+            os.remove("tests/data/sfcf_test/data_c/data_c_r0/data_c_r0_n"+str(i))
+
+        
+def test_o_bb():
+    build_test_environment("o",5,3)
+    f_1 = sfin.read_sfcf("tests/data/sfcf_test/data_o", "test", "f_1",quarks="lquark lquark", wf = 0, wf2=0, version = "2.0", corr_type="bb")
+    print(f_1)
+    clean_test_environment("o",5,3)
+    assert len(f_1) == 1
+    assert f_1[0].value == 351.1941525454502
+        
+def test_o_bi():
+    build_test_environment("o",5,3)
+    f_A = sfin.read_sfcf("tests/data/sfcf_test/data_o", "test", "f_A",quarks="lquark lquark", wf = 0, version = "2.0")
+    print(f_A)
+    clean_test_environment("o",5,3)
+    assert len(f_A) == 3
+    assert f_A[0].value == 65.4711887279723
+    assert f_A[1].value == 1.0447210336915187
+    assert f_A[2].value == -41.025094911185185
+            
+def test_o_bib():
+    build_test_environment("o",5,3)
+    f_V0 = sfin.read_sfcf("tests/data/sfcf_test/data_o", "test", "F_V0",quarks="lquark lquark", wf = 0, wf2 = 0, version = "2.0", corr_type="bib")
+    print(f_V0)
+    clean_test_environment("o",5,3)
+    assert len(f_V0) == 3
+    assert f_V0[0] == 683.6776090085115
+    assert f_V0[1] == 661.3188585582334
+    assert f_V0[2] == 683.6776090081005
+
+def test_c_bb():
+    build_test_environment("c",5,3)
+    f_1 = sfin.read_sfcf("tests/data/sfcf_test/data_c", "data_c", "f_1", quarks="lquark lquark", wf = 0, wf2=0, version = "2.0c", corr_type="bb")
+    print(f_1)
+    clean_test_environment("c",5,3)
+    assert len(f_1) == 1
+    assert f_1[0].value == 351.1941525454502
+
+def test_c_bi():
+    build_test_environment("c",5,3)
+    f_A = sfin.read_sfcf("tests/data/sfcf_test/data_c", "data_c", "f_A", quarks="lquark lquark", wf = 0, version = "2.0c")
+    print(f_A)
+    clean_test_environment("c",5,3)
+    assert len(f_A) == 3
+    assert f_A[0].value == 65.4711887279723
+    assert f_A[1].value == 1.0447210336915187
+    assert f_A[2].value == -41.025094911185185
+
+def test_c_bib():
+    build_test_environment("c",5,3)
+    f_V0 = sfin.read_sfcf("tests/data/sfcf_test/data_c", "data_c", "F_V0",quarks="lquark lquark", wf = 0, wf2 = 0, version = "2.0c", corr_type="bib")
+    print(f_V0)
+    clean_test_environment("c",5,3)
+    assert len(f_V0) == 3
+    assert f_V0[0] == 683.6776090085115
+    assert f_V0[1] == 661.3188585582334
+    assert f_V0[2] == 683.6776090081005
+
+def test_a_bb():
+    build_test_environment("a",5,3)
+    f_1 = sfin.read_sfcf("tests/data/sfcf_test/data_a", "data_a", "f_1", quarks="lquark lquark", wf = 0, wf2=0, version = "2.0a", corr_type="bb")
+    print(f_1)
+    clean_test_environment("a",5,3)
+    assert len(f_1) == 1
+    assert f_1[0].value == 351.1941525454502
+
+def test_a_bi():
+    build_test_environment("a",5,3)
+    f_A = sfin.read_sfcf("tests/data/sfcf_test/data_a", "data_a", "f_A", quarks="lquark lquark", wf = 0, version = "2.0a")
+    print(f_A)
+    clean_test_environment("a",5,3)
+    assert len(f_A) == 3
+    assert f_A[0].value == 65.4711887279723
+    assert f_A[1].value == 1.0447210336915187
+    assert f_A[2].value == -41.02509491118518
+
+def test_a_bib():
+    build_test_environment("a",5,3)
+    f_V0 = sfin.read_sfcf("tests/data/sfcf_test/data_a", "data_a", "F_V0",quarks="lquark lquark", wf = 0, wf2 = 0, version = "2.0a", corr_type="bib")
+    print(f_V0)
+    clean_test_environment("a",5,3)
+    assert len(f_V0) == 3
+    assert f_V0[0] == 683.6776090085115
+    assert f_V0[1] == 661.3188585582334
+    assert f_V0[2] == 683.6776090081005
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