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/miplib3/normalized-mps-v2-20-10-qnet1.opb
MD5SUMf52b19653c4b2560629833931dd98a65
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 3720
Biggest coefficient in the objective function 536870912
Number of bits for the biggest coefficient in the objective function 30
Sum of the numbers in the objective function 133143986052
Number of bits of the sum of numbers in the objective function 37
Biggest number in a constraint 8388608000000
Number of bits of the biggest number in a constraint 43
Biggest sum of numbers in a constraint 17124187591735
Number of bits of the biggest sum of numbers44
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark1.64575
Number of variables5380
Total number of constraints632
Number of constraints which are clauses40
Number of constraints which are cardinality constraints (but not clauses)48
Number of constraints which are nor clauses,nor cardinality constraints544
Minimum length of a constraint2
Maximum length of a constraint77

Trace number 10102

Launcher Data

LAUNCH ON wulflinc29 THE 2005-09-23 17:00:44 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=8863 boxname=wulflinc29 idbench=659 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  f52b19653c4b2560629833931dd98a65  /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-qnet1.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-qnet1.opb
IDLAUNCH: 8863
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.077
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		: 451.077
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:        924252 kB
Buffers:         11892 kB
Cached:          81336 kB
SwapCached:          0 kB
Active:          44700 kB
Inactive:        51420 kB
HighTotal:      131008 kB
HighFree:        50064 kB
LowTotal:       903652 kB
LowFree:        874188 kB
SwapTotal:     2097892 kB
SwapFree:      2097892 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6980 kB
Slab:             8736 kB
Committed_AS:    63660 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-23 17:01:05 (client local time) WITH STATUS 20 IN 21.2048 SECONDS
stats: 8863 7 21.2048 20

Solver Data

c This solver internally uses Chaff 2004.11.15 Simplified
c running zchaff...
s UNSATISFIABLE

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/9048/stat): 9048 (pb2sat) R 9047 9048 4005 0 -1 0 18 0 0 0 0 0 0 0 24 0 1 0 21784261 1527808 2 4294967295 134512640 135987407 3221224560 3221224560 134512928 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/9048/statm): 373 2 364 364 0 9 0
[pid=9048] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-qnet1.opb

[startup+10.0013 s]
Raw data (loadavg): 0.87 0.97 0.94 2/55 9048
Raw data (/proc/9048/stat): 9048 (pb2sat) R 9047 9048 4005 0 -1 0 26777 0 0 0 932 65 0 0 25 0 1 0 21784261 81539072 15189 4294967295 134512640 135987407 3221224560 3221223408 134818110 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9048/statm): 19907 15189 364 364 0 19543 0
[pid=9048] vsize: 79628
Current children cumulated CPU time (s) 9.97
Current children cumulated vsize (Kb) 79628

[startup+20.0021 s]
Raw data (loadavg): 0.89 0.97 0.94 2/55 9050
Raw data (/proc/9048/stat): 9048 (pb2sat) R 9047 9048 4005 0 -1 0 27633 0 0 0 1882 83 0 0 25 0 1 0 21784261 85159936 16045 4294967295 134512640 135987407 3221224560 3221223408 134790000 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/9048/statm): 20791 16045 364 364 0 20427 0
[pid=9048] vsize: 83164
Current children cumulated CPU time (s) 19.65
Current children cumulated vsize (Kb) 83164
One traced child (pid=9048) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 21.6096
CPU time (s): 21.2048
CPU user time (s): 20.3099
CPU system time (s): 0.894863
CPU usage (%): 98.1264
Max. virtual memory (cumulated for all children) (Kb): 83164

Verifier Data

ERROR: no interpretation found !