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/MIPLIB/miplib3/normalized-mps-v2-13-7-qnet1_o.opb
MD5SUM1663d824f64922ec9a31929abe96b909
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 2480
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 130023300
Number of bits of the sum of numbers in the objective function 27
Biggest number in a constraint 20945120000
Number of bits of the biggest number in a constraint 35
Biggest sum of numbers in a constraint 59755435295
Number of bits of the biggest sum of numbers36
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.810876
Number of variables4140
Total number of constraints585
Number of constraints which are clauses32
Number of constraints which are cardinality constraints (but not clauses)48
Number of constraints which are nor clauses,nor cardinality constraints505
Minimum length of a constraint2
Maximum length of a constraint54

Trace number 10487

Launcher Data

LAUNCH ON wulflinc24 THE 2005-09-23 18:37:58 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=9248 boxname=wulflinc24 idbench=1044 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  1663d824f64922ec9a31929abe96b909  /oldhome/oroussel/tmp/wulflinc24/normalized-mps-v2-13-7-qnet1_o.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc24/normalized-mps-v2-13-7-qnet1_o.opb
IDLAUNCH: 9248
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.047
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		: 451.047
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:        890356 kB
Buffers:         16036 kB
Cached:         109220 kB
SwapCached:          0 kB
Active:          66568 kB
Inactive:        61568 kB
HighTotal:      131008 kB
HighFree:        20552 kB
LowTotal:       903652 kB
LowFree:        869804 kB
SwapTotal:     2097892 kB
SwapFree:      2097892 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6980 kB
Slab:            10576 kB
Committed_AS:    63660 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-23 18:38:44 (client local time) WITH STATUS 20 IN 45.1831 SECONDS
stats: 9248 7 45.1831 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/10205/stat): 10205 (pb2sat) R 10204 10205 4059 0 -1 0 18 0 0 0 0 0 0 0 24 0 1 0 22402095 1527808 2 4294967295 134512640 135987407 3221224560 3221224560 134512928 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/10205/statm): 373 2 364 364 0 9 0
[pid=10205] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc24/normalized-mps-v2-13-7-qnet1_o.opb

[startup+10.0014 s]
Raw data (loadavg): 0.94 0.97 0.92 2/55 10205
Raw data (/proc/10205/stat): 10205 (pb2sat) R 10204 10205 4059 0 -1 0 15175 0 0 0 934 46 0 0 25 0 1 0 22402095 45436928 9382 4294967295 134512640 135987407 3221224560 3221223248 134811964 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/10205/statm): 11093 9382 364 364 0 10729 0
[pid=10205] vsize: 44372
Current children cumulated CPU time (s) 9.8
Current children cumulated vsize (Kb) 44372

[startup+20.0021 s]
Raw data (loadavg): 0.95 0.97 0.92 2/55 10205
Raw data (/proc/10205/stat): 10205 (pb2sat) R 10204 10205 4059 0 -1 0 15451 0 0 0 1893 62 0 0 25 0 1 0 22402095 46477312 9658 4294967295 134512640 135987407 3221224560 3221223408 134790000 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/10205/statm): 11347 9658 364 364 0 10983 0
[pid=10205] vsize: 45388
Current children cumulated CPU time (s) 19.55
Current children cumulated vsize (Kb) 45388

[startup+30.0028 s]
Raw data (loadavg): 0.95 0.97 0.92 2/55 10205
Raw data (/proc/10205/stat): 10205 (pb2sat) R 10204 10205 4059 0 -1 0 15805 0 0 0 2855 76 0 0 25 0 1 0 22402095 47923200 9979 4294967295 134512640 135987407 3221224560 3221223248 134811950 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/10205/statm): 11700 9979 364 364 0 11336 0
[pid=10205] vsize: 46800
Current children cumulated CPU time (s) 29.31
Current children cumulated vsize (Kb) 46800

[startup+40.0025 s]
Raw data (loadavg): 0.96 0.97 0.92 2/55 10205
Raw data (/proc/10205/stat): 10205 (pb2sat) R 10204 10205 4059 0 -1 0 15945 0 0 0 3805 93 0 0 25 0 1 0 22402095 48381952 10119 4294967295 134512640 135987407 3221224560 3221223248 134811775 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/10205/statm): 11812 10119 364 364 0 11448 0
[pid=10205] vsize: 47248
Current children cumulated CPU time (s) 38.98
Current children cumulated vsize (Kb) 47248
One traced child (pid=10205) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 46.4477
CPU time (s): 45.1831
CPU user time (s): 44.1103
CPU system time (s): 1.07284
CPU usage (%): 97.2775
Max. virtual memory (cumulated for all children) (Kb): 47248

Verifier Data

ERROR: no interpretation found !