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-lotfi.opb
MD5SUMd0cc302a544eb359eec19c9f7d39cc8a
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 240
Biggest coefficient in the objective function 536870912
Number of bits for the biggest coefficient in the objective function 30
Sum of the numbers in the objective function 8589934584
Number of bits of the sum of numbers in the objective function 33
Biggest number in a constraint 5368709120000000000
Number of bits of the biggest number in a constraint 63
Biggest sum of numbers in a constraint 40952512476384968704
Number of bits of the biggest sum of numbers66
Best result obtained on this benchmark
Best CPU time to get the best result obtained on this benchmark
Number of variables9240
Total number of constraints153
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 constraints153
Minimum length of a constraint30
Maximum length of a constraint3990

Trace number 450

Launcher Data

LAUNCH ON wulflinc5 THE 2005-09-18 10:42:43 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=441 boxname=wulflinc5 idbench=441 idsolver=1 numberseed=0
MD5SUM SOLVER: 38f99674050b34630888bf623b924b59  /oldhome/oroussel/solvers/bsolo
MD5SUM BENCH:  d0cc302a544eb359eec19c9f7d39cc8a  /oldhome/oroussel/tmp/wulflinc5/normalized-mps-v2-20-10-lotfi.opb
REAL COMMAND:  bsolo /oldhome/oroussel/tmp/wulflinc5/normalized-mps-v2-20-10-lotfi.opb
IDLAUNCH: 441
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.007
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		: 451.007
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:        952568 kB
Buffers:         33784 kB
Cached:          24448 kB
SwapCached:        792 kB
Active:          52788 kB
Inactive:         8180 kB
HighTotal:      131008 kB
HighFree:       102396 kB
LowTotal:       903652 kB
LowFree:        850172 kB
SwapTotal:     2097136 kB
SwapFree:      2095876 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5804 kB
Slab:            15444 kB
Committed_AS:    64300 kB
PageTables:        332 kB
VmallocTotal:   114680 kB
VmallocUsed:      1364 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-18 10:42:45 (client local time) WITH STATUS 0 IN 1.20582 SECONDS
stats: 441 7 1.20582 0

Solver Data

c INFO: OSL Context initialized.
c BIG Int formula...
c Integer values too big to handle...
c Parse Error 8
c Problem opening input file name: /oldhome/oroussel/tmp/wulflinc5/normalized-mps-v2-20-10-lotfi.opb
s UNKNOWN
c Exit Code: 0

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/2525/stat): 2525 (bsolo) R 2524 2525 824 0 -1 0 19 0 0 0 0 0 0 0 23 0 1 0 1782399390 438272 3 4294967295 134512640 134736556 3221224560 3221224560 1073744960 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/2525/statm): 107 3 90 68 0 39 0
[pid=2525] vsize: 428
open syscall for file /etc/ld.so.preload
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open syscall for file /oldhome/oroussel/tmp/wulflinc5/normalized-mps-v2-20-10-lotfi.opb
One traced child (pid=2525) exited with status: 0
All traced children have exited ! Game is over.

Child status: 0
Real time (s): 1.2672
CPU time (s): 1.20582
CPU user time (s): 1.08283
CPU system time (s): 0.122981
CPU usage (%): 95.1559
Max. virtual memory (cumulated for all children) (Kb): 0

Verifier Data

ERROR: no interpretation found !