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-v2-20-10/MIPLIB/miplib/normalized-mps-v2-20-10-pipex.opb
MD5SUMb9c1029cc1d97a8d60e984f96f5d3267
Bench Categoryoptimization, medium integers (OPTMEDINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 788263
Optimality of the best value was proved YES
Number of terms in the objective function 48
Biggest coefficient in the objective function 107865
Number of bits for the biggest coefficient in the objective function 17
Sum of the numbers in the objective function 2514082
Number of bits of the sum of numbers in the objective function 22
Biggest number in a constraint 107865
Number of bits of the biggest number in a constraint 17
Biggest sum of numbers in a constraint 2514082
Number of bits of the biggest sum of numbers22
Best result obtained on this benchmarkOPTIMUM FOUND
Best CPU time to get the best result obtained on this benchmark45.4331
Number of variables48
Total number of constraints73
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)64
Number of constraints which are nor clauses,nor cardinality constraints9
Minimum length of a constraint1
Maximum length of a constraint16

Trace number 9983

Launcher Data

LAUNCH ON wulflinc27 THE 2005-09-23 16:21:45 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=8740 boxname=wulflinc27 idbench=536 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  b9c1029cc1d97a8d60e984f96f5d3267  /oldhome/oroussel/tmp/wulflinc27/normalized-mps-v2-20-10-pipex.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc27/normalized-mps-v2-20-10-pipex.opb
IDLAUNCH: 8740
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.039
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	: 3
cpu MHz		: 451.039
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	: 901.12

/proc/meminfo:
MemTotal:      1034660 kB
MemFree:        941260 kB
Buffers:         11568 kB
Cached:          65000 kB
SwapCached:          0 kB
Active:          45012 kB
Inactive:        34444 kB
HighTotal:      131008 kB
HighFree:        61600 kB
LowTotal:       903652 kB
LowFree:        879660 kB
SwapTotal:     2097892 kB
SwapFree:      2097892 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6984 kB
Slab:             8304 kB
Committed_AS:    63660 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-23 16:23:40 (client local time) WITH STATUS 1 IN 114.444 SECONDS
stats: 8740 7 114.444 1

Solver Data

c This solver internally uses Chaff 2004.11.15 Simplified
c running zchaff...
c got solution with objective value: 828241
c small objective detected

	Unexpected exception :
	St9bad_alloc

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/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 18 0 0 0 0 0 0 0 24 0 1 0 21551817 1527808 2 4294967295 134512640 135987407 3221224560 3221224560 134512928 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 373 2 364 364 0 9 0
[pid=9111] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc27/normalized-mps-v2-20-10-pipex.opb

[startup+10.0022 s]
Raw data (loadavg): 0.93 0.95 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 31302 0 0 0 930 65 0 0 25 0 1 0 21551817 99405824 20144 4294967295 134512640 135987407 3221224560 3221205520 134866075 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 24269 20144 364 364 0 23905 0
[pid=9111] vsize: 97076
Current children cumulated CPU time (s) 9.95
Current children cumulated vsize (Kb) 97076

[startup+20.003 s]
Raw data (loadavg): 0.94 0.95 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 61504 0 0 0 1866 126 0 0 25 0 1 0 21551817 195457024 39128 4294967295 134512640 135987407 3221224560 3221206028 134669188 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 47719 39128 364 364 0 47355 0
[pid=9111] vsize: 190876
Current children cumulated CPU time (s) 19.92
Current children cumulated vsize (Kb) 190876

[startup+30.0028 s]
Raw data (loadavg): 0.95 0.95 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 103439 0 0 0 2778 210 0 0 25 0 1 0 21551817 327929856 58850 4294967295 134512640 135987407 3221224560 3221204592 134877831 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 80061 58850 364 364 0 79697 0
[pid=9111] vsize: 320244
Current children cumulated CPU time (s) 29.88
Current children cumulated vsize (Kb) 320244

[startup+40.0037 s]
Raw data (loadavg): 0.95 0.95 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 120900 0 0 0 3742 244 0 0 25 0 1 0 21551817 387768320 76103 4294967295 134512640 135987407 3221224560 3221206016 134537552 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 94670 76103 364 364 0 94306 0
[pid=9111] vsize: 378680
Current children cumulated CPU time (s) 39.86
Current children cumulated vsize (Kb) 378680

[startup+50.0045 s]
Raw data (loadavg): 0.96 0.95 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 146573 0 0 0 4687 295 0 0 25 0 1 0 21551817 570851328 101302 4294967295 134512640 135987407 3221224560 3221207004 135482121 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 139368 101302 364 364 0 139004 0
[pid=9111] vsize: 557472
Current children cumulated CPU time (s) 49.82
Current children cumulated vsize (Kb) 557472

[startup+60.0053 s]
Raw data (loadavg): 0.97 0.95 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 188716 0 0 0 5600 377 0 0 25 0 1 0 21551817 752496640 123900 4294967295 134512640 135987407 3221224560 3221208768 134887489 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 183715 123900 364 364 0 183351 0
[pid=9111] vsize: 734860
Current children cumulated CPU time (s) 59.77
Current children cumulated vsize (Kb) 734860

[startup+70.0062 s]
Raw data (loadavg): 0.97 0.96 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 219940 0 0 0 6530 446 0 0 25 0 1 0 21551817 705437696 130365 4294967295 134512640 135987407 3221224560 3221205840 134877638 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 172226 130365 364 364 0 171862 0
[pid=9111] vsize: 688904
Current children cumulated CPU time (s) 69.76
Current children cumulated vsize (Kb) 688904

[startup+80.007 s]
Raw data (loadavg): 0.97 0.96 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 236664 0 0 0 7496 478 0 0 25 0 1 0 21551817 732123136 146900 4294967295 134512640 135987407 3221224560 3221208524 135499903 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 178741 146900 364 364 0 178377 0
[pid=9111] vsize: 714964
Current children cumulated CPU time (s) 79.74
Current children cumulated vsize (Kb) 714964

[startup+90.0078 s]
Raw data (loadavg): 0.98 0.96 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 254762 0 0 0 8459 513 0 0 25 0 1 0 21551817 759783424 164790 4294967295 134512640 135987407 3221224560 3221209912 135487988 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 185494 164790 364 364 0 185130 0
[pid=9111] vsize: 741976
Current children cumulated CPU time (s) 89.72
Current children cumulated vsize (Kb) 741976

[startup+100.008 s]
Raw data (loadavg): 0.98 0.96 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 272377 0 0 0 9425 545 0 0 25 0 1 0 21551817 785510400 182202 4294967295 134512640 135987407 3221224560 3221206616 135486800 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 191775 182202 364 364 0 191411 0
[pid=9111] vsize: 767100
Current children cumulated CPU time (s) 99.7
Current children cumulated vsize (Kb) 767100

[startup+110.008 s]
Raw data (loadavg): 0.98 0.96 0.97 2/55 9111
Raw data (/proc/9111/stat): 9111 (pb2sat) R 9110 9111 4005 0 -1 0 280658 0 0 0 10407 562 0 0 25 0 1 0 21551817 848515072 190384 4294967295 134512640 135987407 3221224560 3221223240 135477274 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/9111/statm): 207157 190384 364 364 0 206793 0
[pid=9111] vsize: 828628
Current children cumulated CPU time (s) 109.69
Current children cumulated vsize (Kb) 828628
One traced child (pid=9111) exited with status: 1
All traced children have exited ! Game is over.

Child status: 1
Real time (s): 114.767
CPU time (s): 114.444
CPU user time (s): 108.427
CPU system time (s): 6.01708
CPU usage (%): 99.718
Max. virtual memory (cumulated for all children) (Kb): 828628

Verifier Data

ERROR: no interpretation found !