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-neos3.opb
MD5SUMaa121475b5e53120a1d24de3f0361b26
Bench Categoryoptimization, big integers (OPTBIGINT)
Has Objective FunctionYES
Satisfiable
(Un)Satisfiability was proved
Best value of the objective function
Optimality of the best value was proved
Number of terms in the objective function 155
Biggest coefficient in the objective function 1073741824
Number of bits for the biggest coefficient in the objective function 31
Sum of the numbers in the objective function 10737418235
Number of bits of the sum of numbers in the objective function 34
Biggest number in a constraint 2454208150643933184000
Number of bits of the biggest number in a constraint 72
Biggest sum of numbers in a constraint 289272765430218954375168
Number of bits of the biggest sum of numbers78
Best result obtained on this benchmark
Best CPU time to get the best result obtained on this benchmark
Number of variables42220
Total number of constraints2841
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)1377
Number of constraints which are nor clauses,nor cardinality constraints1464
Minimum length of a constraint1
Maximum length of a constraint4780

Trace number 6353

Launcher Data

LAUNCH ON wulflinc15 THE 2005-09-20 06:07:56 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=4245 boxname=wulflinc15 idbench=729 idsolver=4 numberseed=0
MD5SUM SOLVER: 21c3ffd7205c96d5f0784fd273b92938  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  aa121475b5e53120a1d24de3f0361b26  /oldhome/oroussel/tmp/wulflinc15/normalized-mps-v2-20-10-neos3.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc15/normalized-mps-v2-20-10-neos3.opb
IDLAUNCH: 4245
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 450.999
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	: 890.88

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 450.999
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:        881248 kB
Buffers:         15308 kB
Cached:         108524 kB
SwapCached:        744 kB
Active:          36180 kB
Inactive:        90288 kB
HighTotal:      131008 kB
HighFree:        23940 kB
LowTotal:       903652 kB
LowFree:        857308 kB
SwapTotal:     2097136 kB
SwapFree:      2095884 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5720 kB
Slab:            21316 kB
Committed_AS:    64168 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1364 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-20 06:08:26 (client local time) WITH STATUS 20 IN 30.0664 SECONDS
stats: 4245 7 30.0664 20

Solver Data

c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc15/normalized-mps-v2-20-10-neos3.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.092986

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/32058/stat): 32058 (PBS4) R 32057 32058 31778 0 -1 0 18 0 0 0 0 0 0 0 22 0 1 0 1798017885 978944 2 4294967295 134512640 135450776 3221224560 3221224560 134512960 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/32058/statm): 239 2 232 232 0 7 0
[pid=32058] vsize: 956
open syscall for file /dev/null
open syscall for file /oldhome/oroussel/tmp/wulflinc15/normalized-mps-v2-20-10-neos3.opb
open syscall for file /oldhome/oroussel/tmp/wulflinc15/normalized-mps-v2-20-10-neos3.opb

[startup+10.0033 s]
Raw data (loadavg): 0.93 0.97 0.94 2/56 32058
Raw data (/proc/32058/stat): 32058 (PBS4) R 32057 32058 31778 0 -1 0 2098 0 0 0 991 7 0 0 25 0 1 0 1798017885 9396224 2048 4294967295 134512640 135450776 3221224560 3221223056 134524224 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/32058/statm): 2294 2048 232 232 0 2062 0
[pid=32058] vsize: 9176
Current children cumulated CPU time (s) 9.98
Current children cumulated vsize (Kb) 9176

[startup+20.0031 s]
Raw data (loadavg): 0.94 0.97 0.94 2/56 32058
Raw data (/proc/32058/stat): 32058 (PBS4) R 32057 32058 31778 0 -1 0 2973 0 0 0 1987 10 0 0 25 0 1 0 1798017885 12992512 2923 4294967295 134512640 135450776 3221224560 3221223072 134600419 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/32058/statm): 3172 2923 232 232 0 2940 0
[pid=32058] vsize: 12688
Current children cumulated CPU time (s) 19.97
Current children cumulated vsize (Kb) 12688

[startup+30.004 s]
Raw data (loadavg): 0.95 0.97 0.94 2/56 32058
Raw data (/proc/32058/stat): 32058 (PBS4) R 32057 32058 31778 0 -1 0 3655 0 0 0 2983 13 0 0 25 0 1 0 1798017885 15740928 3605 4294967295 134512640 135450776 3221224560 3221223536 134554326 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/32058/statm): 3843 3605 232 232 0 3611 0
[pid=32058] vsize: 15372
Current children cumulated CPU time (s) 29.96
Current children cumulated vsize (Kb) 15372
One traced child (pid=32058) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 30.1135
CPU time (s): 30.0664
CPU user time (s): 29.9274
CPU system time (s): 0.138978
CPU usage (%): 99.8437
Max. virtual memory (cumulated for all children) (Kb): 15372

Verifier Data

ERROR: no interpretation found !