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/plato.asu.edu/pub/milp/normalized-mps-v2-20-10-nug08.opb
MD5SUMc527241c4d9537dec2ef265de58c54af
Bench Categoryoptimization, medium integers (OPTMEDINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 107
Optimality of the best value was proved NO
Number of terms in the objective function 20160
Biggest coefficient in the objective function 20971520
Number of bits for the biggest coefficient in the objective function 25
Sum of the numbers in the objective function 9042910800
Number of bits of the sum of numbers in the objective function 34
Biggest number in a constraint 20971520
Number of bits of the biggest number in a constraint 25
Biggest sum of numbers in a constraint 9042910800
Number of bits of the biggest sum of numbers34
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark1195.17
Number of variables32640
Total number of constraints912
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 constraints912
Minimum length of a constraint160
Maximum length of a constraint160

Trace number 10178

Launcher Data

LAUNCH ON wulflinc23 THE 2005-09-23 17:25:57 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=8939 boxname=wulflinc23 idbench=735 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  c527241c4d9537dec2ef265de58c54af  /oldhome/oroussel/tmp/wulflinc23/normalized-mps-v2-20-10-nug08.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc23/normalized-mps-v2-20-10-nug08.opb
IDLAUNCH: 8939
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.185
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		: 451.185
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:        896924 kB
Buffers:         14880 kB
Cached:         104188 kB
SwapCached:          0 kB
Active:          62292 kB
Inactive:        59660 kB
HighTotal:      131008 kB
HighFree:        28616 kB
LowTotal:       903652 kB
LowFree:        868308 kB
SwapTotal:     2097136 kB
SwapFree:      2097136 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6980 kB
Slab:            10112 kB
Committed_AS:    63624 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1364 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-23 17:27:29 (client local time) WITH STATUS 0 IN 89.1564 SECONDS
stats: 8939 7 89.1564 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/9692/stat): 9692 (pb2sat) R 9691 9692 4060 0 -1 0 18 0 0 0 0 0 0 0 22 0 1 0 21970143 1527808 2 4294967295 134512640 135987407 3221224560 3221224560 134512928 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/9692/statm): 373 2 364 364 0 9 0
[pid=9692] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc23/normalized-mps-v2-20-10-nug08.opb

[startup+10.002 s]
Raw data (loadavg): 0.94 0.97 0.91 2/55 9692
Raw data (/proc/9692/stat): 9692 (pb2sat) R 9691 9692 4060 0 -1 0 13851 0 0 0 964 33 0 0 25 0 1 0 21970143 44052480 8220 4294967295 134512640 135987407 3221224560 3221184576 134865861 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9692/statm): 10755 8220 364 364 0 10391 0
[pid=9692] vsize: 43020
Current children cumulated CPU time (s) 9.97
Current children cumulated vsize (Kb) 43020

[startup+20.0027 s]
Raw data (loadavg): 0.94 0.97 0.91 2/55 9692
Raw data (/proc/9692/stat): 9692 (pb2sat) R 9691 9692 4060 0 -1 0 48624 0 0 0 1885 110 0 0 25 0 1 0 21970143 158392320 26244 4294967295 134512640 135987407 3221224560 3221196016 134856409 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9692/statm): 38670 26244 364 364 0 38306 0
[pid=9692] vsize: 154680
Current children cumulated CPU time (s) 19.95
Current children cumulated vsize (Kb) 154680

[startup+30.0023 s]
Raw data (loadavg): 0.95 0.97 0.91 2/55 9692
Raw data (/proc/9692/stat): 9692 (pb2sat) R 9691 9692 4060 0 -1 0 90343 0 0 0 2790 202 0 0 25 0 1 0 21970143 275939328 45715 4294967295 134512640 135987407 3221224560 3221193856 134887887 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9692/statm): 67368 45715 364 364 0 67004 0
[pid=9692] vsize: 269472
Current children cumulated CPU time (s) 29.92
Current children cumulated vsize (Kb) 269472

[startup+40.003 s]
Raw data (loadavg): 0.96 0.97 0.91 2/55 9692
Raw data (/proc/9692/stat): 9692 (pb2sat) R 9691 9692 4060 0 -1 0 106977 0 0 0 3749 243 0 0 25 0 1 0 21970143 314359808 62068 4294967295 134512640 135987407 3221224560 3221171100 134866788 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9692/statm): 76748 62068 364 364 0 76384 0
[pid=9692] vsize: 306992
Current children cumulated CPU time (s) 39.92
Current children cumulated vsize (Kb) 306992

[startup+50.0036 s]
Raw data (loadavg): 0.97 0.97 0.91 2/55 9692
Raw data (/proc/9692/stat): 9692 (pb2sat) R 9691 9692 4060 0 -1 0 150406 0 0 0 4653 334 0 0 25 0 1 0 21970143 444194816 85844 4294967295 134512640 135987407 3221224560 3221176912 134878092 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9692/statm): 108446 85844 364 364 0 108082 0
[pid=9692] vsize: 433784
Current children cumulated CPU time (s) 49.87
Current children cumulated vsize (Kb) 433784

[startup+60.0042 s]
Raw data (loadavg): 0.97 0.97 0.91 2/55 9692
Raw data (/proc/9692/stat): 9692 (pb2sat) R 9691 9692 4060 0 -1 0 188014 0 0 0 5565 423 0 0 25 0 1 0 21970143 582062080 98655 4294967295 134512640 135987407 3221224560 3221181152 134877708 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9692/statm): 142105 98655 364 364 0 141741 0
[pid=9692] vsize: 568420
Current children cumulated CPU time (s) 59.88
Current children cumulated vsize (Kb) 568420

[startup+70.0039 s]
Raw data (loadavg): 0.97 0.97 0.91 2/55 9692
Raw data (/proc/9692/stat): 9692 (pb2sat) R 9691 9692 4060 0 -1 0 205687 0 0 0 6517 469 0 0 25 0 1 0 21970143 587739136 116033 4294967295 134512640 135987407 3221224560 3221185052 134637918 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9692/statm): 143491 116033 364 364 0 143127 0
[pid=9692] vsize: 573964
Current children cumulated CPU time (s) 69.86
Current children cumulated vsize (Kb) 573964

[startup+80.0045 s]
Raw data (loadavg): 0.98 0.97 0.91 2/55 9692
Raw data (/proc/9692/stat): 9692 (pb2sat) R 9691 9692 4060 0 -1 0 223626 0 0 0 7470 514 0 0 25 0 1 0 21970143 593551360 133673 4294967295 134512640 135987407 3221224560 3221186104 134802665 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9692/statm): 144910 133673 364 364 0 144546 0
[pid=9692] vsize: 579640
Current children cumulated CPU time (s) 79.84
Current children cumulated vsize (Kb) 579640



Mem limit exceeded: sending SIGTERM then SIGKILL

[startup+88.9625 s]
Raw data (loadavg): 0.98 0.97 0.91 1/55 9692
Raw data (/proc/9692/stat): 9692 (pb2sat) T 9691 9692 4060 0 -1 0 241412 0 0 0 8323 557 0 0 25 0 1 0 21970143 943833088 151058 4294967295 134512640 135987407 3221224560 3221205820 135635874 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/9692/statm): 230428 151058 364 364 0 230064 0
[pid=9692] vsize: 921712
Current children cumulated CPU time (s) 88.8
Current children cumulated vsize (Kb) 921712

Sending SIGTERM to -9692
Sleeping 2 seconds

[startup+90.0051 s]
Raw data (loadavg): 0.98 0.97 0.91 1/56 9693
Raw data (/proc/9692/stat): 9692 (pb2sat) S 9691 9692 4060 0 -1 0 241413 0 0 0 8327 557 0 0 25 0 1 0 21970143 943833088 151059 4294967295 134512640 135987407 3221224560 3221204520 135549753 0 16384 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9692/statm): 230428 151059 364 364 0 230064 0
[pid=9692] vsize: 921712
Current children cumulated CPU time (s) 88.84
Current children cumulated vsize (Kb) 921712
Sending SIGKILL to -9692
One traced child (pid=9692) 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): 91.2792
CPU time (s): 89.1564
CPU user time (s): 83.2753
CPU system time (s): 5.8811
CPU usage (%): 97.6745
Max. virtual memory (cumulated for all children) (Kb): 921712

Verifier Data

ERROR: no interpretation found !