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-stein27.opb
MD5SUM5cfd2609faa97ca60458112609ce37ee
Bench Categoryoptimization, small integers (OPTSMALLINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 18
Optimality of the best value was proved YES
Number of terms in the objective function 27
Biggest coefficient in the objective function 1
Number of bits for the biggest coefficient in the objective function 1
Sum of the numbers in the objective function 27
Number of bits of the sum of numbers in the objective function 5
Biggest number in a constraint 13
Number of bits of the biggest number in a constraint 4
Biggest sum of numbers in a constraint 40
Number of bits of the biggest sum of numbers6
Best result obtained on this benchmarkOPTIMUM FOUND
Best CPU time to get the best result obtained on this benchmark1.43378
Number of variables27
Total number of constraints145
Number of constraints which are clauses117
Number of constraints which are cardinality constraints (but not clauses)28
Number of constraints which are nor clauses,nor cardinality constraints0
Minimum length of a constraint1
Maximum length of a constraint27

Trace number 10108

Launcher Data

LAUNCH ON wulflinc28 THE 2005-09-23 17:01:58 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=8870 boxname=wulflinc28 idbench=666 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  5cfd2609faa97ca60458112609ce37ee  /oldhome/oroussel/tmp/wulflinc28/normalized-mps-v2-20-10-stein27.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc28/normalized-mps-v2-20-10-stein27.opb
IDLAUNCH: 8870
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.188
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		: 451.188
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:        937392 kB
Buffers:         11896 kB
Cached:          68548 kB
SwapCached:          0 kB
Active:          43772 kB
Inactive:        39536 kB
HighTotal:      131008 kB
HighFree:        58268 kB
LowTotal:       903652 kB
LowFree:        879124 kB
SwapTotal:     2097640 kB
SwapFree:      2097640 kB
Dirty:              52 kB
Writeback:           0 kB
Mapped:           6984 kB
Slab:             8304 kB
Committed_AS:    63660 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-23 17:02:06 (client local time) WITH STATUS 30 IN 7.85981 SECONDS
stats: 8870 0 7.85981 30

Solver Data

c This solver internally uses Chaff 2004.11.15 Simplified
c running zchaff...
c got solution with objective value: 27
c small objective detected
c [startup+0.105 s]  setting bit 4 to 0
c got solution with objective value: 18
c [startup+0.119743 s]  setting bit 3 to 1
c [startup+0.4394 s]  setting bit 2 to 0

c Decision: 185/633	Time: 0.837873/86400
c Decision: 194/633	Time: 1.13783/86400
c [startup+2.32488 s]  setting bit 1 to 0

c Decision: 205/633	Time: 1.15982/86400
c Decision: 205/633	Time: 1.51977/86400
c Decision: 205/633	Time: 1.92271/86400
c Decision: 222/633	Time: 2.6176/86400
c Decision: 222/633	Time: 3.02454/86400
c Decision: 222/633	Time: 3.49247/86400
c Decision: 222/633	Time: 3.9204/86400
c Decision: 253/633	Time: 4.97024/86400
c [startup+8.35732 s]  setting bit 0 to 0
s OPTIMUM FOUND
v V0001_bit0 V0002_bit0 -V0003_bit0 -V0004_bit0 -V0005_bit0 V0006_bit0 -V0007_bit0 V0008_bit0 V0009_bit0 V0010_bit0 V0011_bit0 -V0012_bit0 V0013_bit0 V0014_bit0 V0015_bit0 V0016_bit0 V0017_bit0 V0018_bit0 V0019_bit0 V0020_bit0 V0021_bit0 -V0022_bit0 V0023_bit0 -V0024_bit0 -V0025_bit0 V0026_bit0 -V0027_bit0

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/8814/stat): 8814 (pb2sat) R 8813 8814 4005 0 -1 0 18 0 0 0 0 0 0 0 24 0 1 0 21793369 1527808 2 4294967295 134512640 135987407 3221224560 3221224560 134512928 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/8814/statm): 373 2 364 364 0 9 0
[pid=8814] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc28/normalized-mps-v2-20-10-stein27.opb
One traced child (pid=8814) exited with status: 30
All traced children have exited ! Game is over.

Child status: 30
Real time (s): 8.37178
CPU time (s): 7.85981
CPU user time (s): 7.58385
CPU system time (s): 0.275958
CPU usage (%): 93.8845
Max. virtual memory (cumulated for all children) (Kb): 0

Verifier Data

Verifier:	OK	18