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/miplib2003/normalized-mps-v2-20-10-momentum1.opb
MD5SUM611e05ec291e603bb8a780ac778ac9aa
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 31027
Biggest coefficient in the objective function 16384000000
Number of bits for the biggest coefficient in the objective function 34
Sum of the numbers in the objective function 1372391683575
Number of bits of the sum of numbers in the objective function 41
Biggest number in a constraint 536870912000000000000000
Number of bits of the biggest number in a constraint 79
Biggest sum of numbers in a constraint 1073792773951002037452800
Number of bits of the biggest sum of numbers80
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark30.6013
Number of variables41495
Total number of constraints47575
Number of constraints which are clauses24365
Number of constraints which are cardinality constraints (but not clauses)3166
Number of constraints which are nor clauses,nor cardinality constraints20044
Minimum length of a constraint1
Maximum length of a constraint840

Trace number 3989

Launcher Data

LAUNCH ON wulflinc29 THE 2005-09-19 04:42:45 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=4095 boxname=wulflinc29 idbench=579 idsolver=4 numberseed=0
MD5SUM SOLVER: 21c3ffd7205c96d5f0784fd273b92938  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  611e05ec291e603bb8a780ac778ac9aa  /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-momentum1.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-momentum1.opb
IDLAUNCH: 4095
/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:        886116 kB
Buffers:         34572 kB
Cached:          83840 kB
SwapCached:        792 kB
Active:          65072 kB
Inactive:        56036 kB
HighTotal:      131008 kB
HighFree:        46032 kB
LowTotal:       903652 kB
LowFree:        840084 kB
SwapTotal:     2097892 kB
SwapFree:      2096664 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5740 kB
Slab:            21636 kB
Committed_AS:    64132 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-19 04:43:42 (client local time) WITH STATUS 20 IN 56.0875 SECONDS
stats: 4095 7 56.0875 20

Solver Data

c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-momentum1.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.104984

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/27731/stat): 27731 (PBS4) R 27730 27731 19818 0 -1 0 18 0 0 0 0 0 0 0 23 0 1 0 1847092371 978944 2 4294967295 134512640 135450776 3221224560 3221224560 134512960 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/27731/statm): 239 2 232 232 0 7 0
[pid=27731] vsize: 956
open syscall for file /dev/null
open syscall for file /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-momentum1.opb
open syscall for file /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-momentum1.opb

[startup+10.0031 s]
Raw data (loadavg): 0.94 0.97 0.99 2/56 27731
Raw data (/proc/27731/stat): 27731 (PBS4) R 27730 27731 19818 0 -1 0 2043 0 0 0 993 5 0 0 25 0 1 0 1847092371 9166848 1960 4294967295 134512640 135450776 3221224560 3221223072 134599227 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/27731/statm): 2238 1960 232 232 0 2006 0
[pid=27731] vsize: 8952
Current children cumulated CPU time (s) 9.98
Current children cumulated vsize (Kb) 8952

[startup+20.0039 s]
Raw data (loadavg): 0.95 0.97 0.99 2/56 27731
Raw data (/proc/27731/stat): 27731 (PBS4) R 27730 27731 19818 0 -1 0 2165 0 0 0 1992 6 0 0 25 0 1 0 1847092371 9666560 2082 4294967295 134512640 135450776 3221224560 3221223072 134600412 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/27731/statm): 2360 2082 232 232 0 2128 0
[pid=27731] vsize: 9440
Current children cumulated CPU time (s) 19.98
Current children cumulated vsize (Kb) 9440

[startup+30.0047 s]
Raw data (loadavg): 0.96 0.97 0.99 2/56 27731
Raw data (/proc/27731/stat): 27731 (PBS4) R 27730 27731 19818 0 -1 0 2165 0 0 0 2992 6 0 0 25 0 1 0 1847092371 9666560 2082 4294967295 134512640 135450776 3221224560 3221223072 134600412 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/27731/statm): 2360 2082 232 232 0 2128 0
[pid=27731] vsize: 9440
Current children cumulated CPU time (s) 29.98
Current children cumulated vsize (Kb) 9440

[startup+40.0055 s]
Raw data (loadavg): 0.96 0.97 0.99 2/56 27731
Raw data (/proc/27731/stat): 27731 (PBS4) R 27730 27731 19818 0 -1 0 2165 0 0 0 3992 6 0 0 25 0 1 0 1847092371 9666560 2082 4294967295 134512640 135450776 3221224560 3221223072 134600507 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/27731/statm): 2360 2082 232 232 0 2128 0
[pid=27731] vsize: 9440
Current children cumulated CPU time (s) 39.98
Current children cumulated vsize (Kb) 9440

[startup+50.0063 s]
Raw data (loadavg): 0.97 0.97 0.99 2/56 27731
Raw data (/proc/27731/stat): 27731 (PBS4) R 27730 27731 19818 0 -1 0 5863 0 0 0 4976 19 0 0 25 0 1 0 1847092371 16424960 3674 4294967295 134512640 135450776 3221224560 3221223072 134601289 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/27731/statm): 4010 3674 232 232 0 3778 0
[pid=27731] vsize: 16040
Current children cumulated CPU time (s) 49.95
Current children cumulated vsize (Kb) 16040
One traced child (pid=27731) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 56.1699
CPU time (s): 56.0875
CPU user time (s): 55.7915
CPU system time (s): 0.295955
CPU usage (%): 99.8533
Max. virtual memory (cumulated for all children) (Kb): 16040

Verifier Data

ERROR: no interpretation found !