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-v2-13-7/MIPLIB/miplib3/normalized-mps-v2-13-7-p0282.opb
MD5SUM1a8deb577df7e72871b7e1004c098336
Bench Categoryoptimization, medium integers (OPTMEDINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 258411
Optimality of the best value was proved NO
Number of terms in the objective function 282
Biggest coefficient in the objective function 160646
Number of bits for the biggest coefficient in the objective function 18
Sum of the numbers in the objective function 1302615
Number of bits of the sum of numbers in the objective function 21
Biggest number in a constraint 160646
Number of bits of the biggest number in a constraint 18
Biggest sum of numbers in a constraint 1302615
Number of bits of the biggest sum of numbers21
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark1.02084
Number of variables282
Total number of constraints523
Number of constraints which are clauses177
Number of constraints which are cardinality constraints (but not clauses)282
Number of constraints which are nor clauses,nor cardinality constraints64
Minimum length of a constraint1
Maximum length of a constraint57

Trace number 14960 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc4 THE 2005-04-21 02:37:18 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=18712 boxname=wulflinc4 idbench=1440 idsolver=5 numberseed=0
MD5SUM SOLVER: 1d62365061f6d70b1a242542b016b2e4  /oldhome/oroussel/solvers/minisat+
MD5SUM BENCH:  1a8deb577df7e72871b7e1004c098336  /oldhome/oroussel/tmp/wulflinc4/normalized-mps-v2-13-7-p0282.opb
REAL COMMAND:  minisat+ /oldhome/oroussel/tmp/wulflinc4/normalized-mps-v2-13-7-p0282.opb
IDLAUNCH: 18712
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.169
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	: 2
cpu MHz		: 451.169
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:        796700 kB
Buffers:         32348 kB
Cached:         183076 kB
SwapCached:          0 kB
Active:          26760 kB
Inactive:       191472 kB
HighTotal:      131008 kB
HighFree:        18592 kB
LowTotal:       903652 kB
LowFree:        778108 kB
SwapTotal:     2097136 kB
SwapFree:      2096992 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6816 kB
Slab:            14004 kB
Committed_AS:    71676 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1388 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-04-21 02:37:18 (client local time) WITH STATUS 0 IN 0.217965 SECONDS
stats: 18712 7 0.217965 0
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
#### 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): 0.91 0.95 0.90 2/54 31049
Raw data (stat): 31049 (runsolver) R 31048 5897 5896 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 483307920 1052672 99 4294967295 134512640 135381576 3221224528 3221219772 135158418 0 2147483391 7 90112 0 0 0 17 1 0 0
Raw data (statm): 257 99 215 215 0 42 0
vsize: 1028
[startup+0.225471 s]
Raw data (loadavg): 0.91 0.95 0.90 1/53 31049
Raw data (stat): 31049 (runsolver) R 31048 5897 5896 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 483307920 1052672 99 4294967295 134512640 135381576 3221224528 3221219772 135158418 0 2147483391 7 90112 0 0 0 17 1 0 0
Raw data (statm): 257 99 215 215 0 42 0
vsize: 0

Child ended because it received signal 11 (SIGSEGV)
Real time (s): 0.225155
CPU time (s): 0.217965
CPU user time (s): 0.19097
CPU system time (s): 0.026995
CPU usage (%): 96.8066
Max. virtual memory (Kb): 1028
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####