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/ftp.netlib.org/lp/data/normalized-mps-v2-20-10-scrs8.opb
MD5SUM5dc586d2135331b914090f6587c7f4ee
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 24750
Biggest coefficient in the objective function 284830543390965760000
Number of bits for the biggest coefficient in the objective function 68
Sum of the numbers in the objective function 7193462013935082274816
Number of bits of the sum of numbers in the objective function 73
Biggest number in a constraint 284830543390965760000
Number of bits of the biggest number in a constraint 68
Biggest sum of numbers in a constraint 7193462013935082274816
Number of bits of the biggest sum of numbers73
Best result obtained on this benchmark
Best CPU time to get the best result obtained on this benchmark
Number of variables35070
Total number of constraints490
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 constraints490
Minimum length of a constraint30
Maximum length of a constraint1110

Trace number 2773

Launcher Data

LAUNCH ON wulflinc18 THE 2005-09-18 21:44:59 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=3978 boxname=wulflinc18 idbench=462 idsolver=4 numberseed=0
MD5SUM SOLVER: 21c3ffd7205c96d5f0784fd273b92938  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  5dc586d2135331b914090f6587c7f4ee  /oldhome/oroussel/tmp/wulflinc18/normalized-mps-v2-20-10-scrs8.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc18/normalized-mps-v2-20-10-scrs8.opb
IDLAUNCH: 3978
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.177
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		: 451.177
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:        919952 kB
Buffers:         23276 kB
Cached:          56936 kB
SwapCached:        844 kB
Active:          32444 kB
Inactive:        50420 kB
HighTotal:      131008 kB
HighFree:        70840 kB
LowTotal:       903652 kB
LowFree:        849112 kB
SwapTotal:     2097892 kB
SwapFree:      2096548 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5764 kB
Slab:            26092 kB
Committed_AS:    64180 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-18 21:45:42 (client local time) WITH STATUS 20 IN 42.9925 SECONDS
stats: 3978 7 42.9925 20

Solver Data

c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc18/normalized-mps-v2-20-10-scrs8.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.083987

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/7213/stat): 7213 (PBS4) R 7212 7213 31027 0 -1 0 18 0 0 0 0 0 0 0 22 0 1 0 1844562068 978944 2 4294967295 134512640 135450776 3221224560 3221224560 134512960 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/7213/statm): 239 2 232 232 0 7 0
[pid=7213] vsize: 956
open syscall for file /dev/null
open syscall for file /oldhome/oroussel/tmp/wulflinc18/normalized-mps-v2-20-10-scrs8.opb
open syscall for file /oldhome/oroussel/tmp/wulflinc18/normalized-mps-v2-20-10-scrs8.opb

[startup+10.0026 s]
Raw data (loadavg): 0.84 0.93 0.92 2/56 7213
Raw data (/proc/7213/stat): 7213 (PBS4) R 7212 7213 31027 0 -1 0 1781 0 0 0 993 5 0 0 25 0 1 0 1844562068 8118272 1698 4294967295 134512640 135450776 3221224560 3221223072 134599243 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/7213/statm): 1982 1698 232 232 0 1750 0
[pid=7213] vsize: 7928
Current children cumulated CPU time (s) 9.98
Current children cumulated vsize (Kb) 7928

[startup+20.0035 s]
Raw data (loadavg): 0.86 0.93 0.92 2/56 7213
Raw data (/proc/7213/stat): 7213 (PBS4) R 7212 7213 31027 0 -1 0 1878 0 0 0 1993 5 0 0 25 0 1 0 1844562068 8515584 1795 4294967295 134512640 135450776 3221224560 3221223072 134600412 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/7213/statm): 2079 1795 232 232 0 1847 0
[pid=7213] vsize: 8316
Current children cumulated CPU time (s) 19.98
Current children cumulated vsize (Kb) 8316

[startup+30.0045 s]
Raw data (loadavg): 0.88 0.93 0.92 2/56 7213
Raw data (/proc/7213/stat): 7213 (PBS4) R 7212 7213 31027 0 -1 0 1878 0 0 0 2994 5 0 0 25 0 1 0 1844562068 8515584 1795 4294967295 134512640 135450776 3221224560 3221223072 134600412 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/7213/statm): 2079 1795 232 232 0 1847 0
[pid=7213] vsize: 8316
Current children cumulated CPU time (s) 29.99
Current children cumulated vsize (Kb) 8316

[startup+40.0054 s]
Raw data (loadavg): 0.90 0.93 0.92 1/56 7213
Raw data (/proc/7213/stat): 7213 (PBS4) T 7212 7213 31027 0 -1 0 3662 0 0 0 3988 11 0 0 25 0 1 0 1844562068 11599872 2512 4294967295 134512640 135450776 3221224560 3221222832 135124493 0 0 5 0 3222434794 0 0 17 0 0 0
Raw data (/proc/7213/statm): 2832 2512 232 232 0 2600 0
[pid=7213] vsize: 11328
Current children cumulated CPU time (s) 39.99
Current children cumulated vsize (Kb) 11328
One traced child (pid=7213) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 43.0091
CPU time (s): 42.9925
CPU user time (s): 42.8425
CPU system time (s): 0.149977
CPU usage (%): 99.9613
Max. virtual memory (cumulated for all children) (Kb): 11328

Verifier Data

ERROR: no interpretation found !