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).
  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

Namenormalized-opb/mps-v2-13-7/ftp.netlib.org/lp/data/normalized-mps-v2-13-7-sc50a.opb
MD5SUMd1a63d8d6fb70cfa129ffc4588721d0f
Bench Categoryoptimization, medium integers (OPTMEDINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 0
Optimality of the best value was proved NO
Number of terms in the objective function 20
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 1048575
Number of bits of the sum of numbers in the objective function 20
Biggest number in a constraint 8388608
Number of bits of the biggest number in a constraint 24
Biggest sum of numbers in a constraint 22020075
Number of bits of the biggest sum of numbers25
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark1.19282
Number of variables960
Total number of constraints49
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 constraints49
Minimum length of a constraint40
Maximum length of a constraint80

Trace number 35460 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc29 THE 2005-05-28 13:16:31 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=24771 boxname=wulflinc29 idbench=1243 idsolver=17 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  d1a63d8d6fb70cfa129ffc4588721d0f  /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-13-7-sc50a.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-13-7-sc50a.opb
IDLAUNCH: 24771
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.020
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		: 451.020
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:        740588 kB
Buffers:         34784 kB
Cached:         234476 kB
SwapCached:        632 kB
Active:          16292 kB
Inactive:       254984 kB
HighTotal:      131008 kB
HighFree:        29176 kB
LowTotal:       903652 kB
LowFree:        711412 kB
SwapTotal:     2097892 kB
SwapFree:      2096368 kB
Dirty:              24 kB
Writeback:           0 kB
Mapped:           5132 kB
Slab:            17064 kB
Committed_AS:    63604 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-05-28 13:17:13 (client local time) WITH STATUS 20 IN 41.8086 SECONDS
stats: 24771 7 41.8086 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c This solver internally uses Chaff 2004.11.15 Simplified
c running zchaff...
c CONFLICT during preprocess 
c [startup+0.936818 s]  setting bit 19 to 0
c CONFLICT during preprocess 
c [startup+0.999525 s]  setting bit 18 to 0
c CONFLICT during preprocess 
c [startup+1.06222 s]  setting bit 17 to 0
c CONFLICT during preprocess 
c [startup+1.12591 s]  setting bit 16 to 0
c CONFLICT during preprocess 
c [startup+1.18981 s]  setting bit 15 to 0
c CONFLICT during preprocess 
c [startup+1.25481 s]  setting bit 14 to 0

Decision: 4644/21081	Time: 3.99739/86400
Decision: 5067/21081	Time: 7.59384/86400c [startup+10.5642 s]  setting bit 13 to 0

Decision: 3348/21081	Time: 3.54746/86400
Decision: 3348/21081	Time: 5.98509/86400c [startup+22.2392 s]  setting bit 12 to 0
c [startup+27.7609 s]  setting bit 11 to 0
c [startup+32.503 s]  setting bit 10 to 0
c [startup+34.4668 s]  setting bit 9 to 0
c [startup+36.6911 s]  setting bit 8 to 0
c [startup+38.1921 s]  setting bit 7 to 0
c [startup+39.4057 s]  setting bit 6 to 0
c [startup+40.3053 s]  setting bit 5 to 0
c [startup+40.7248 s]  setting bit 4 to 0
c [startup+41.0074 s]  setting bit 3 to 0
c [startup+41.2728 s]  setting bit 2 to 0
c [startup+41.5133 s]  setting bit 1 to 0
c [startup+41.7526 s]  setting bit 0 to 0
s UNSATISFIABLE
#### END SOLVER DATA ####
#### BEGIN WATCHER DATA ####
Enforcing CPU limit (will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime (will send SIGXCPU) limit: 1230 seconds
Enforcing VSIZE limit: 943718400 bytes
Enforcing Stack size limit: 67108864 bytes
Current StackSize limit: 67108864 bytes
Raw data (loadavg): 0.91 0.95 0.91 2/54 28841
Raw data (stat): 28841 (runsolver) R 28840 20001 20000 0 -1 64 8 0 0 0 0 0 0 0 19 0 1 0 865087905 884736 94 4294967295 134512640 135332820 3221224464 3221219644 135092226 0 2147483391 7 90112 0 0 0 17 0 0 0
Raw data (statm): 216 94 205 205 0 11 0
vsize: 864
[startup+10.001 s]
Raw data (loadavg): 0.93 0.95 0.91 2/54 28841
Raw data (stat): 28841 (pb2sat) R 28840 20001 20000 0 -1 0 3570 0 0 0 991 8 0 0 25 0 1 0 865087905 11464704 1870 4294967295 134512640 135726644 3221224576 3221223072 134744004 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 2799 1870 300 300 0 2499 0
vsize: 11196
[startup+20.0015 s]
Raw data (loadavg): 0.94 0.96 0.91 2/54 28841
Raw data (stat): 28841 (pb2sat) R 28840 20001 20000 0 -1 0 3871 0 0 0 1989 10 0 0 25 0 1 0 865087905 11763712 2045 4294967295 134512640 135726644 3221224576 3221223072 134744022 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 2872 2045 300 300 0 2572 0
vsize: 11488
[startup+30.0019 s]
Raw data (loadavg): 0.95 0.96 0.91 2/54 28841
Raw data (stat): 28841 (pb2sat) R 28840 20001 20000 0 -1 0 4122 0 0 0 2987 12 0 0 25 0 1 0 865087905 14168064 2212 4294967295 134512640 135726644 3221224576 3221223072 134743980 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 3459 2212 300 300 0 3159 0
vsize: 13836
[startup+40.0021 s]
Raw data (loadavg): 0.95 0.96 0.91 2/54 28841
Raw data (stat): 28841 (pb2sat) R 28840 20001 20000 0 -1 0 4567 0 0 0 3984 15 0 0 25 0 1 0 865087905 14303232 2447 4294967295 134512640 135726644 3221224576 3221223072 134743901 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 3492 2447 300 300 0 3192 0
vsize: 13968
[startup+41.8106 s]
Raw data (loadavg): 0.96 0.96 0.91 1/53 28841
Raw data (stat): 28841 (pb2sat) R 28840 20001 20000 0 -1 0 4567 0 0 0 3984 15 0 0 25 0 1 0 865087905 14303232 2447 4294967295 134512640 135726644 3221224576 3221223072 134743901 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 3492 2447 300 300 0 3192 0
vsize: 0

Child status: 20
Real time (s): 41.8103
CPU time (s): 41.8086
CPU user time (s): 41.6427
CPU system time (s): 0.165974
CPU usage (%): 99.9959
Max. virtual memory (Kb): 13968
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####