Some explanations

A solver is run under the control of another program named runsolver. runsolver is in charge of imposing the CPU time limit and the memory limit to the solver. It also monitors some information about the process. The trace of the execution of a solver is divided in four parts:
  1. LAUNCHER DATA
    These informations are related to the script which will launch the solver. The most important informations are the command line given to the solver, the md5sum of the different files and the dump of the /proc/cpuinfo and /proc/meminfo which provide some useful information on the computer.
  2. SOLVER DATA
    This is the output of the solver (stdout and stderr).
    Note that some very long lines in this section may be truncated by your web browser !
  3. WATCHER DATA
    This is the informations gathered by the runsolver program. It first prints the different limits. There's a first limit on CPU time set to 1200 seconds. After this time has ellapsed, runsolver sends a SIGTERM and 2 seconds later a SIGKILL to the solver. For safety, there's also another limit set to 1230 seconds which will send a SIGXPU to the solver. The last limit is on the virtual memory used by the process (900Mb).
    Every ten seconds, the runsolver process fetches the content of /proc/loadavg, /proc/pid/stat and /proc/pid/statm (see man proc) and prints it as raw data. This is only recorded in case we need to investigate the behaviour of a solver. The memory used by the solver (vsize) is also given every ten seconds.
    When the solver exits, runsolver prints some informations such as status and time. CPU usage is the ratio CPU Time/Real Time.
  4. VERIFIER DATA
    The output of the solver is piped to a verifier program which will search a value line "v " and, if found, will check that the given interpretation satisfies all constraints.

General information on the benchmark

Namemps-v2-13-7/ftp.netlib.org/lp/data/normalized-mps-v2-13-7-stair.opb
MD5SUM07f65f29ee2937de43752221c6dbdf88
Bench Categoryoptimization, big integers (OPTBIGINT)
Has Objective FunctionYES
SatisfiableNO
(Un)Satisfiability was proved
Best value of the objective function
Optimality of the best value was proved
Number of terms in the objective function 20
Biggest coefficient in the objective function 524288
Number of bits for the biggest coefficient in the objective function 20
Sum of the numbers in the objective function 1048575
Number of bits of the sum of numbers in the objective function 20
Biggest number in a constraint 516561567744
Number of bits of the biggest number in a constraint 39
Biggest sum of numbers in a constraint 3615347139525
Number of bits of the biggest sum of numbers42
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark158.962
Number of variables7646
Total number of constraints362
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)0
Number of constraints which are nor clauses,nor cardinality constraints362
Minimum length of a constraint10
Maximum length of a constraint540

Trace number 5076

Launcher Data

LAUNCH ON wulflinc11 THE 2005-09-19 22:32:00 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=863 boxname=wulflinc11 idbench=863 idsolver=1 numberseed=0
MD5SUM SOLVER: 38f99674050b34630888bf623b924b59  /oldhome/oroussel/solvers/bsolo
MD5SUM BENCH:  07f65f29ee2937de43752221c6dbdf88  /oldhome/oroussel/tmp/wulflinc11/normalized-mps-v2-13-7-stair.opb
REAL COMMAND:  bsolo /oldhome/oroussel/tmp/wulflinc11/normalized-mps-v2-13-7-stair.opb
IDLAUNCH: 863
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.028
cache size	: 512 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips	: 888.83

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.028
cache size	: 512 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips	: 899.07

/proc/meminfo:
MemTotal:      1034660 kB
MemFree:        918384 kB
Buffers:          3636 kB
Cached:          86168 kB
SwapCached:        840 kB
Active:          19924 kB
Inactive:        72340 kB
HighTotal:      131008 kB
HighFree:        41188 kB
LowTotal:       903652 kB
LowFree:        877196 kB
SwapTotal:     2097136 kB
SwapFree:      2095596 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5580 kB
Slab:            18204 kB
Committed_AS:    64132 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1364 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-19 22:35:16 (client local time) WITH STATUS 20 IN 158.962 SECONDS
stats: 863 7 158.962 20

Solver Data

c INFO: OSL Context initialized.
c BIG Int formula...
c Initial problem consists of 7646 variables and 571 constraints.
c No problem reductions applied in OPT. instance.
c	preprocess terminated. Elapsed time: 4.136
c After prepocess the problem consists of 6988 variables and 571 constraints.
c Initial Lower Bound: -131071
c Restart #1 #Var: 6988 #Dec: 60243 LB: -131071 @ 10.462
c Restart #2 #Var: 6988 #Dec: 170864 LB: -131071 @ 22.326
c Restart #3 #Var: 6988 #Dec: 331348 LB: -131071 @ 39.741
c Restart #4 #Var: 6988 #Dec: 543581 LB: -131071 @ 62.857
c Restart #5 #Var: 6988 #Dec: 811427 LB: -131071 @ 92.062
c Restart #6 #Var: 6988 #Dec: 1013635 LB: -131071 @ 114.06
c Restart #7 #Var: 6988 #Dec: 1287281 LB: -131071 @ 146.26
c Restart #8 #Var: 6983 #Dec: 1363887 LB: -131071 @ 158.57
s UNSATISFIABLE
c Exit Code: 20
c Total time: 158.93 s

Watcher Data

Enforcing CPU limit (will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime (will send SIGXCPU) limit: 1230 seconds
Enforcing Stack size limit: 67108864 bytes
Enforcing memory limit (will send SIGTERM then SIGKILL): 921600 Kb
Enforcing VSIZE limit: 994918400 bytes
Current StackSize limit: 67108864 bytes
Raw data (/proc/29625/stat): 29625 (bsolo) R 29624 29625 9854 0 -1 0 19 0 0 0 0 0 0 0 23 0 1 0 1795287903 438272 3 4294967295 134512640 134736556 3221224560 3221224560 1073744960 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/29625/statm): 107 3 90 68 0 39 0
[pid=29625] vsize: 428
open syscall for file /etc/ld.so.preload
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open syscall for file /oldhome/oroussel/.OptimizationSolutions/nodelock
open syscall for file /oldhome/oroussel/tmp/wulflinc11/normalized-mps-v2-13-7-stair.opb

[startup+10.0027 s]
Raw data (loadavg): 0.91 0.98 0.99 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 8157 0 0 0 789 81 0 0 17 0 1 0 1795287903 36749312 8068 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 0 0 0
Raw data (/proc/29625/statm): 8972 8068 1116 68 0 8904 0
[pid=29625] vsize: 35888
Current children cumulated CPU time (s) 8.7
Current children cumulated vsize (Kb) 35888

[startup+20.0035 s]
Raw data (loadavg): 0.92 0.98 0.99 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 8278 0 0 0 1492 178 0 0 20 0 1 0 1795287903 37154816 8189 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 0 0 0
Raw data (/proc/29625/statm): 9071 8189 1116 68 0 9003 0
[pid=29625] vsize: 36284
Current children cumulated CPU time (s) 16.7
Current children cumulated vsize (Kb) 36284

[startup+30.0043 s]
Raw data (loadavg): 0.94 0.98 0.99 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 8399 0 0 0 2193 272 0 0 19 0 1 0 1795287903 37695488 8310 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 9203 8310 1116 68 0 9135 0
[pid=29625] vsize: 36812
Current children cumulated CPU time (s) 24.65
Current children cumulated vsize (Kb) 36812

[startup+40.0051 s]
Raw data (loadavg): 0.94 0.98 0.99 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 8527 0 0 0 2901 370 0 0 16 0 1 0 1795287903 38236160 8438 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 9335 8438 1116 68 0 9267 0
[pid=29625] vsize: 37340
Current children cumulated CPU time (s) 32.71
Current children cumulated vsize (Kb) 37340

[startup+50.0059 s]
Raw data (loadavg): 1.03 1.00 1.00 2/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) R 29624 29625 9854 0 -1 0 8652 0 0 0 3612 464 0 0 16 0 1 0 1795287903 38776832 8563 4294967295 134512640 134736556 3221224560 3221223328 134608960 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/29625/statm): 9467 8563 1116 68 0 9399 0
[pid=29625] vsize: 37868
Current children cumulated CPU time (s) 40.76
Current children cumulated vsize (Kb) 37868

[startup+60.0057 s]
Raw data (loadavg): 1.02 1.00 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 8772 0 0 0 4306 565 0 0 16 0 1 0 1795287903 39182336 8683 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 9566 8683 1116 68 0 9498 0
[pid=29625] vsize: 38264
Current children cumulated CPU time (s) 48.71
Current children cumulated vsize (Kb) 38264

[startup+70.0065 s]
Raw data (loadavg): 1.02 1.00 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 8895 0 0 0 5013 666 0 0 15 0 1 0 1795287903 39723008 8806 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 9698 8806 1116 68 0 9630 0
[pid=29625] vsize: 38792
Current children cumulated CPU time (s) 56.79
Current children cumulated vsize (Kb) 38792

[startup+80.0072 s]
Raw data (loadavg): 1.10 1.01 1.00 2/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) R 29624 29625 9854 0 -1 0 9022 0 0 0 5723 762 0 0 16 0 1 0 1795287903 40263680 8933 4294967295 134512640 134736556 3221224560 3221223280 134609101 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/29625/statm): 9830 8933 1116 68 0 9762 0
[pid=29625] vsize: 39320
Current children cumulated CPU time (s) 64.85
Current children cumulated vsize (Kb) 39320

[startup+90.007 s]
Raw data (loadavg): 1.08 1.01 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 9145 0 0 0 6426 861 0 0 16 0 1 0 1795287903 40804352 9056 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 9962 9056 1116 68 0 9894 0
[pid=29625] vsize: 39848
Current children cumulated CPU time (s) 72.87
Current children cumulated vsize (Kb) 39848

[startup+100.008 s]
Raw data (loadavg): 1.07 1.01 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 9269 0 0 0 7130 958 0 0 15 0 1 0 1795287903 41209856 9180 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 10061 9180 1116 68 0 9993 0
[pid=29625] vsize: 40244
Current children cumulated CPU time (s) 80.88
Current children cumulated vsize (Kb) 40244

[startup+110.009 s]
Raw data (loadavg): 1.06 1.01 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 9394 0 0 0 7836 1058 0 0 16 0 1 0 1795287903 41750528 9305 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 10193 9305 1116 68 0 10125 0
[pid=29625] vsize: 40772
Current children cumulated CPU time (s) 88.94
Current children cumulated vsize (Kb) 40772

[startup+120.009 s]
Raw data (loadavg): 1.05 1.01 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 9513 0 0 0 8538 1158 0 0 16 0 1 0 1795287903 42291200 9424 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 10325 9424 1116 68 0 10257 0
[pid=29625] vsize: 41300
Current children cumulated CPU time (s) 96.96
Current children cumulated vsize (Kb) 41300

[startup+130.01 s]
Raw data (loadavg): 1.04 1.01 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 9778 0 0 0 9247 1251 0 0 15 0 1 0 1795287903 43372544 9689 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 10589 9689 1116 68 0 10521 0
[pid=29625] vsize: 42356
Current children cumulated CPU time (s) 104.98
Current children cumulated vsize (Kb) 42356

[startup+140.014 s]
Raw data (loadavg): 1.03 1.01 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 10334 0 0 0 9949 1351 0 0 15 0 1 0 1795287903 45670400 10245 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 11150 10245 1116 68 0 11082 0
[pid=29625] vsize: 44600
Current children cumulated CPU time (s) 113
Current children cumulated vsize (Kb) 44600

[startup+150.015 s]
Raw data (loadavg): 1.03 1.01 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 10640 0 0 0 10659 1449 0 0 16 0 1 0 1795287903 46886912 10551 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 0 0 0
Raw data (/proc/29625/statm): 11447 10551 1116 68 0 11379 0
[pid=29625] vsize: 45788
Current children cumulated CPU time (s) 121.08
Current children cumulated vsize (Kb) 45788

[startup+160.016 s]
Raw data (loadavg): 1.02 1.00 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 10927 0 0 0 11381 1543 0 0 16 0 1 0 1795287903 48103424 10838 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 11744 10838 1116 68 0 11676 0
[pid=29625] vsize: 46976
Current children cumulated CPU time (s) 129.24
Current children cumulated vsize (Kb) 46976

[startup+170.015 s]
Raw data (loadavg): 1.02 1.00 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 11159 0 0 0 12101 1639 0 0 15 0 1 0 1795287903 49049600 11070 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 11975 11070 1116 68 0 11907 0
[pid=29625] vsize: 47900
Current children cumulated CPU time (s) 137.4
Current children cumulated vsize (Kb) 47900

[startup+180.016 s]
Raw data (loadavg): 1.02 1.00 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 11417 0 0 0 12835 1731 0 0 15 0 1 0 1795287903 49995776 11328 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 0 0 0
Raw data (/proc/29625/statm): 12206 11328 1116 68 0 12138 0
[pid=29625] vsize: 48824
Current children cumulated CPU time (s) 145.66
Current children cumulated vsize (Kb) 48824

[startup+190.017 s]
Raw data (loadavg): 1.01 1.00 1.00 1/56 29625
Raw data (/proc/29625/stat): 29625 (bsolo) T 29624 29625 9854 0 -1 0 11698 0 0 0 13619 1804 0 0 16 0 1 0 1795287903 51212288 11609 4294967295 134512640 134736556 3221224560 3221223452 1077781665 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/29625/statm): 12503 11609 1116 68 0 12435 0
[pid=29625] vsize: 50012
Current children cumulated CPU time (s) 154.23
Current children cumulated vsize (Kb) 50012
One traced child (pid=29625) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 195.475
CPU time (s): 158.962
CPU user time (s): 140.517
CPU system time (s): 18.4452
CPU usage (%): 81.3207
Max. virtual memory (cumulated for all children) (Kb): 50012

Verifier Data

ERROR: no interpretation found !