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/miplib3/normalized-mps-v2-13-7-qnet1_o.opb
MD5SUM1663d824f64922ec9a31929abe96b909
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 2480
Biggest coefficient in the objective function 524288
Number of bits for the biggest coefficient in the objective function 20
Sum of the numbers in the objective function 130023300
Number of bits of the sum of numbers in the objective function 27
Biggest number in a constraint 20945120000
Number of bits of the biggest number in a constraint 35
Biggest sum of numbers in a constraint 59755435295
Number of bits of the biggest sum of numbers36
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.810876
Number of variables4140
Total number of constraints585
Number of constraints which are clauses32
Number of constraints which are cardinality constraints (but not clauses)48
Number of constraints which are nor clauses,nor cardinality constraints505
Minimum length of a constraint2
Maximum length of a constraint54

Trace number 5246

Launcher Data

LAUNCH ON wulflinc2 THE 2005-09-19 23:58:10 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=1044 boxname=wulflinc2 idbench=1044 idsolver=1 numberseed=0
MD5SUM SOLVER: 38f99674050b34630888bf623b924b59  /oldhome/oroussel/solvers/bsolo
MD5SUM BENCH:  1663d824f64922ec9a31929abe96b909  /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-13-7-qnet1_o.opb
REAL COMMAND:  bsolo /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-13-7-qnet1_o.opb
IDLAUNCH: 1044
/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:        914480 kB
Buffers:          3972 kB
Cached:          91996 kB
SwapCached:        864 kB
Active:          27104 kB
Inactive:        71400 kB
HighTotal:      131008 kB
HighFree:        35140 kB
LowTotal:       903652 kB
LowFree:        879340 kB
SwapTotal:     2097136 kB
SwapFree:      2095536 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5492 kB
Slab:            15976 kB
Committed_AS:    72324 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1388 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-19 23:58:13 (client local time) WITH STATUS 20 IN 2.55861 SECONDS
stats: 1044 7 2.55861 20

Solver Data

c INFO: OSL Context initialized.
c BIG Int formula...
c Initial problem consists of 4140 variables and 916 constraints.
c No problem reductions applied in OPT. instance.
c	preprocess terminated. Elapsed time: 1.959
c After prepocess the problem consists of 3824 variables and 886 constraints.
c Initial Lower Bound: 0
s UNSATISFIABLE
c Exit Code: 20
c Total time: 2.524 s

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/31596/stat): 31596 (bsolo) R 31595 31596 6872 0 -1 0 19 0 0 0 0 0 0 0 22 0 1 0 1795820937 438272 3 4294967295 134512640 134736556 3221224560 3221224560 1073744960 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/31596/statm): 107 3 90 68 0 39 0
[pid=31596] vsize: 428
open syscall for file /etc/ld.so.preload
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open syscall for file /lib/tls/libm.so.6
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open syscall for file /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-13-7-qnet1_o.opb
One traced child (pid=31596) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 2.9608
CPU time (s): 2.55861
CPU user time (s): 2.10168
CPU system time (s): 0.45693
CPU usage (%): 86.4161
Max. virtual memory (cumulated for all children) (Kb): 0

Verifier Data

ERROR: no interpretation found !