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-v2-13-7/MIPLIB/miplib2003/normalized-mps-v2-13-7-arki001.opb
MD5SUM458588f978e22d010e8f710d6c38354d
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 21
Biggest coefficient in the objective function 1048576
Number of bits for the biggest coefficient in the objective function 21
Sum of the numbers in the objective function 2097151
Number of bits of the sum of numbers in the objective function 21
Biggest number in a constraint 298325333312000
Number of bits of the biggest number in a constraint 49
Biggest sum of numbers in a constraint 648851746394616
Number of bits of the biggest sum of numbers50
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.249961
Number of variables6423
Total number of constraints2018
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)436
Number of constraints which are nor clauses,nor cardinality constraints1582
Minimum length of a constraint1
Maximum length of a constraint6404

Trace number 6565

Launcher Data

LAUNCH ON wulflinc2 THE 2005-09-20 07:50:00 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=4459 boxname=wulflinc2 idbench=943 idsolver=4 numberseed=0
MD5SUM SOLVER: 21c3ffd7205c96d5f0784fd273b92938  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  458588f978e22d010e8f710d6c38354d  /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-13-7-arki001.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-13-7-arki001.opb
IDLAUNCH: 4459
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.191
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	: 2
cpu MHz		: 451.191
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:        893724 kB
Buffers:         25784 kB
Cached:          89968 kB
SwapCached:       1004 kB
Active:          26040 kB
Inactive:        92360 kB
HighTotal:      131008 kB
HighFree:        39564 kB
LowTotal:       903652 kB
LowFree:        854160 kB
SwapTotal:     2097136 kB
SwapFree:      2095552 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5600 kB
Slab:            16848 kB
Committed_AS:    72456 kB
PageTables:        332 kB
VmallocTotal:   114680 kB
VmallocUsed:      1388 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-20 07:50:06 (client local time) WITH STATUS 20 IN 5.44417 SECONDS
stats: 4459 7 5.44417 20

Solver Data

c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-13-7-arki001.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.011998

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/9835/stat): 9835 (PBS4) R 9834 9835 6872 0 -1 0 18 0 0 0 0 0 0 0 22 0 1 0 1798652347 978944 2 4294967295 134512640 135450776 3221224560 3221224560 134512960 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/9835/statm): 239 2 232 232 0 7 0
[pid=9835] vsize: 956
open syscall for file /dev/null
open syscall for file /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-13-7-arki001.opb
open syscall for file /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-13-7-arki001.opb
One traced child (pid=9835) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 5.47401
CPU time (s): 5.44417
CPU user time (s): 5.39218
CPU system time (s): 0.051992
CPU usage (%): 99.4549
Max. virtual memory (cumulated for all children) (Kb): 0

Verifier Data

ERROR: no interpretation found !