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).
  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

Namenormalized-opb/mps-v2-20-10/plato.asu.edu/pub/milp/normalized-mps-v2-20-10-neos5.opb
MD5SUMe6bff154156b54af3a9a38f7579209b6
Bench Categoryoptimization, small integers (OPTSMALLINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 17324
Optimality of the best value was proved NO
Number of terms in the objective function 163
Biggest coefficient in the objective function 1024
Number of bits for the biggest coefficient in the objective function 11
Sum of the numbers in the objective function 74742
Number of bits of the sum of numbers in the objective function 17
Biggest number in a constraint 8192
Number of bits of the biggest number in a constraint 14
Biggest sum of numbers in a constraint 74742
Number of bits of the biggest sum of numbers17
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark1.06984
Number of variables163
Total number of constraints126
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)56
Number of constraints which are nor clauses,nor cardinality constraints70
Minimum length of a constraint1
Maximum length of a constraint102

Trace number 27964 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc19 THE 2005-05-25 00:09:54 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=14705 boxname=wulflinc19 idbench=1132 idsolver=2 numberseed=0
MD5SUM SOLVER: 754786be69defe53c030aa54f111e0a7  /oldhome/oroussel/solvers/bsolo_lpr_cuts
MD5SUM BENCH:  e6bff154156b54af3a9a38f7579209b6  /oldhome/oroussel/tmp/wulflinc19/normalized-mps-v2-20-10-neos5.opb
REAL COMMAND:  bsolo_lpr_cuts /oldhome/oroussel/tmp/wulflinc19/normalized-mps-v2-20-10-neos5.opb
IDLAUNCH: 14705
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.037
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	: 890.88

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.037
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:        844056 kB
Buffers:         31768 kB
Cached:         132136 kB
SwapCached:        520 kB
Active:          37124 kB
Inactive:       129204 kB
HighTotal:      131008 kB
HighFree:        28616 kB
LowTotal:       903652 kB
LowFree:        815440 kB
SwapTotal:     2097892 kB
SwapFree:      2096796 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5676 kB
Slab:            18660 kB
Committed_AS:    63600 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-05-25 00:10:09 (client local time) WITH STATUS 0 IN 14.1758 SECONDS
stats: 14705 7 14.1758 0
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c INFO: OSL Context initialized.
c Initial problem consists of 163 variables and 73 constraints.
c After prepocess the problem consists of 163 variables and 73 constraints.
c preprocess terminated 0.359 s
c Initial Lower Bound: 13313
c Lower Bound Elapsed time: 0.106
c Use computed LB before first solution.
c NEW SOLUTION FOUND: 18689 @ 1.472

    c  Warning: NO Unit Constraints after backtrack??
	Continuing Execution....


#### END SOLVER DATA ####
#### BEGIN WATCHER DATA ####
Enforcing CPU limit (will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime (will send SIGXCPU) limit: 1230 seconds
Enforcing VSIZE limit: 943718400 bytes
Raw data (loadavg): 0.92 0.97 0.91 2/54 16610
Raw data (stat): 16610 (runsolver) R 16609 10795 10794 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 834441372 1052672 99 4294967295 134512640 135381576 3221224480 3221219692 135158418 0 2147483391 7 90112 0 0 0 17 0 0 0
Raw data (statm): 257 99 215 215 0 42 0
vsize: 1028
[startup+10.0005 s]
Raw data (loadavg): 0.93 0.97 0.91 2/54 16610
Raw data (stat): 16610 (bsolo_lpr_cuts) R 16609 10795 10794 0 -1 0 11190 0 0 0 947 50 0 0 25 0 1 0 834441372 16924672 3440 4294967295 134512640 134714508 3221224576 3221222780 1077781665 0 0 7 0 0 0 0 17 1 0 0
Raw data (statm): 4131 3440 1111 63 0 4068 0
vsize: 16528
[startup+14.2062 s]
Raw data (loadavg): 0.94 0.97 0.91 1/53 16610
Raw data (stat): 16610 (bsolo_lpr_cuts) R 16609 10795 10794 0 -1 0 11190 0 0 0 947 50 0 0 25 0 1 0 834441372 16924672 3440 4294967295 134512640 134714508 3221224576 3221222780 1077781665 0 0 7 0 0 0 0 17 1 0 0
Raw data (statm): 4131 3440 1111 63 0 4068 0
vsize: 0

Child ended because it received signal 11 (SIGSEGV)
Real time (s): 14.2056
CPU time (s): 14.1758
CPU user time (s): 13.482
CPU system time (s): 0.693894
CPU usage (%): 99.7906
Max. virtual memory (Kb): 16528
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####