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/miplib2003/normalized-mps-v2-20-10-aflow40b.opb
MD5SUM64cd8dd71c00255f05a721f3d3f16ae5
Bench Categoryoptimization, medium integers (OPTMEDINT)
Has Objective FunctionYES
Satisfiable
(Un)Satisfiability was proved
Best value of the objective function
Optimality of the best value was proved
Number of terms in the objective function 1364
Biggest coefficient in the objective function 500
Number of bits for the biggest coefficient in the objective function 9
Sum of the numbers in the objective function 230637
Number of bits of the sum of numbers in the objective function 18
Biggest number in a constraint 102400
Number of bits of the biggest number in a constraint 17
Biggest sum of numbers in a constraint 7037881
Number of bits of the biggest sum of numbers23
Best result obtained on this benchmark
Best CPU time to get the best result obtained on this benchmark
Number of variables23384
Total number of constraints4170
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)1403
Number of constraints which are nor clauses,nor cardinality constraints2767
Minimum length of a constraint1
Maximum length of a constraint1202

Trace number 9998

Launcher Data

LAUNCH ON wulflinc20 THE 2005-09-23 16:26:38 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=8760 boxname=wulflinc20 idbench=556 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  64cd8dd71c00255f05a721f3d3f16ae5  /oldhome/oroussel/tmp/wulflinc20/normalized-mps-v2-20-10-aflow40b.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc20/normalized-mps-v2-20-10-aflow40b.opb
IDLAUNCH: 8760
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.012
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		: 451.012
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:        935248 kB
Buffers:         11748 kB
Cached:          70328 kB
SwapCached:          0 kB
Active:          47352 kB
Inactive:        37588 kB
HighTotal:      131008 kB
HighFree:        56252 kB
LowTotal:       903652 kB
LowFree:        878996 kB
SwapTotal:     2097892 kB
SwapFree:      2097892 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6980 kB
Slab:             8796 kB
Committed_AS:    63624 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-23 16:28:16 (client local time) WITH STATUS 0 IN 95.2115 SECONDS
stats: 8760 7 95.2115 0

Solver Data

c This solver internally uses Chaff 2004.11.15 Simplified
s UNKNOWN

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/7852/stat): 7852 (pb2sat) R 7851 7852 4059 0 -1 0 18 0 0 0 0 0 0 0 23 0 1 0 21617843 1527808 2 4294967295 134512640 135987407 3221224560 3221224560 134512928 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/7852/statm): 373 2 364 364 0 9 0
[pid=7852] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc20/normalized-mps-v2-20-10-aflow40b.opb

[startup+10.0017 s]
Raw data (loadavg): 0.80 0.91 0.93 2/55 7852
Raw data (/proc/7852/stat): 7852 (pb2sat) R 7851 7852 4059 0 -1 0 27400 0 0 0 932 64 0 0 25 0 1 0 21617843 88489984 16273 4294967295 134512640 135987407 3221224560 3221000784 134556288 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7852/statm): 21604 16273 364 364 0 21240 0
[pid=7852] vsize: 86416
Current children cumulated CPU time (s) 9.96
Current children cumulated vsize (Kb) 86416

[startup+20.0024 s]
Raw data (loadavg): 0.83 0.92 0.93 2/55 7852
Raw data (/proc/7852/stat): 7852 (pb2sat) R 7851 7852 4059 0 -1 0 55043 0 0 0 1873 122 0 0 25 0 1 0 21617843 166637568 32686 4294967295 134512640 135987407 3221224560 3220987164 135479970 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7852/statm): 40683 32686 364 364 0 40319 0
[pid=7852] vsize: 162732
Current children cumulated CPU time (s) 19.95
Current children cumulated vsize (Kb) 162732

[startup+30.0032 s]
Raw data (loadavg): 0.86 0.92 0.93 2/55 7852
Raw data (/proc/7852/stat): 7852 (pb2sat) R 7851 7852 4059 0 -1 0 94972 0 0 0 2786 206 0 0 25 0 1 0 21617843 283914240 50406 4294967295 134512640 135987407 3221224560 3220892540 135485048 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7852/statm): 69315 50406 364 364 0 68951 0
[pid=7852] vsize: 277260
Current children cumulated CPU time (s) 29.92
Current children cumulated vsize (Kb) 277260

[startup+40.0039 s]
Raw data (loadavg): 0.88 0.92 0.93 2/55 7852
Raw data (/proc/7852/stat): 7852 (pb2sat) R 7851 7852 4059 0 -1 0 109685 0 0 0 3750 241 0 0 25 0 1 0 21617843 321253376 64876 4294967295 134512640 135987407 3221224560 3221174820 134866009 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7852/statm): 78431 64876 364 364 0 78067 0
[pid=7852] vsize: 313724
Current children cumulated CPU time (s) 39.91
Current children cumulated vsize (Kb) 313724

[startup+50.0056 s]
Raw data (loadavg): 0.90 0.92 0.93 2/55 7852
Raw data (/proc/7852/stat): 7852 (pb2sat) R 7851 7852 4059 0 -1 0 151208 0 0 0 4666 322 0 0 25 0 1 0 21617843 517525504 105200 4294967295 134512640 135987407 3221224560 3221179280 134861431 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7852/statm): 126349 105200 364 364 0 125985 0
[pid=7852] vsize: 505396
Current children cumulated CPU time (s) 49.88
Current children cumulated vsize (Kb) 505396

[startup+60.0053 s]
Raw data (loadavg): 0.91 0.92 0.93 2/55 7852
Raw data (/proc/7852/stat): 7852 (pb2sat) R 7851 7852 4059 0 -1 0 188167 0 0 0 5576 411 0 0 25 0 1 0 21617843 587603968 98960 4294967295 134512640 135987407 3221224560 3221096848 134877708 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7852/statm): 143458 98960 364 364 0 143094 0
[pid=7852] vsize: 573832
Current children cumulated CPU time (s) 59.87
Current children cumulated vsize (Kb) 573832

[startup+70.0051 s]
Raw data (loadavg): 0.93 0.93 0.93 2/55 7852
Raw data (/proc/7852/stat): 7852 (pb2sat) R 7851 7852 4059 0 -1 0 203302 0 0 0 6541 446 0 0 25 0 1 0 21617843 591396864 113845 4294967295 134512640 135987407 3221224560 3220983616 134556288 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7852/statm): 144384 113845 364 364 0 144020 0
[pid=7852] vsize: 577536
Current children cumulated CPU time (s) 69.87
Current children cumulated vsize (Kb) 577536

[startup+80.0058 s]
Raw data (loadavg): 0.94 0.93 0.93 2/55 7852
Raw data (/proc/7852/stat): 7852 (pb2sat) R 7851 7852 4059 0 -1 0 219292 0 0 0 7504 483 0 0 25 0 1 0 21617843 596398080 129575 4294967295 134512640 135987407 3221224560 3221143940 135487880 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7852/statm): 145605 129575 364 364 0 145241 0
[pid=7852] vsize: 582420
Current children cumulated CPU time (s) 79.87
Current children cumulated vsize (Kb) 582420

[startup+90.0055 s]
Raw data (loadavg): 0.95 0.93 0.93 2/55 7852
Raw data (/proc/7852/stat): 7852 (pb2sat) R 7851 7852 4059 0 -1 0 232035 0 0 0 8472 514 0 0 25 0 1 0 21617843 650649600 142111 4294967295 134512640 135987407 3221224560 3221220980 134562648 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7852/statm): 158850 142111 364 364 0 158486 0
[pid=7852] vsize: 635400
Current children cumulated CPU time (s) 89.86
Current children cumulated vsize (Kb) 635400



Mem limit exceeded: sending SIGTERM then SIGKILL

[startup+95.0052 s]
Raw data (loadavg): 0.95 0.93 0.93 1/55 7852
Raw data (/proc/7852/stat): 7852 (pb2sat) T 7851 7852 4059 0 -1 0 242783 0 0 0 8949 537 0 0 25 0 1 0 21617843 943841280 152623 4294967295 134512640 135987407 3221224560 3220891964 135635874 0 0 5 16384 3222434794 0 0 17 0 0 0
Raw data (/proc/7852/statm): 230430 152623 364 364 0 230066 0
[pid=7852] vsize: 921720
Current children cumulated CPU time (s) 94.86
Current children cumulated vsize (Kb) 921720

Sending SIGTERM to -7852
Sleeping 2 seconds
Sending SIGKILL to -7852
One traced child (pid=7852) ended because it received signal 9 (SIGKILL)
All traced children have exited ! Game is over.

Child ended because it received signal 9 (SIGKILL)
Real time (s): 97.3235
CPU time (s): 95.2115
CPU user time (s): 89.5254
CPU system time (s): 5.68613
CPU usage (%): 97.83
Max. virtual memory (cumulated for all children) (Kb): 921720

Verifier Data

ERROR: no interpretation found !