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-ran14x18_1.opb
MD5SUMd1752d9737bcd79380522c97c646ca71
Bench Categoryoptimization, big integers (OPTBIGINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 10877893
Optimality of the best value was proved NO
Number of terms in the objective function 7812
Biggest coefficient in the objective function 5368709120
Number of bits for the biggest coefficient in the objective function 33
Sum of the numbers in the objective function 1450667950777
Number of bits of the sum of numbers in the objective function 41
Biggest number in a constraint 5368709120
Number of bits of the biggest number in a constraint 33
Biggest sum of numbers in a constraint 1450667950777
Number of bits of the biggest sum of numbers41
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark1232.2
Number of variables7812
Total number of constraints536
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)252
Number of constraints which are nor clauses,nor cardinality constraints284
Minimum length of a constraint1
Maximum length of a constraint540

Trace number 27949 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc24 THE 2005-05-25 00:06:43 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=14795 boxname=wulflinc24 idbench=1139 idsolver=1 numberseed=0
MD5SUM SOLVER: e973bb179fd0e01ec8c7277096f1c3ef  /oldhome/oroussel/solvers/bsolo_lpr
MD5SUM BENCH:  d1752d9737bcd79380522c97c646ca71  /oldhome/oroussel/tmp/wulflinc24/normalized-mps-v2-20-10-ran14x18_1.opb
REAL COMMAND:  bsolo_lpr /oldhome/oroussel/tmp/wulflinc24/normalized-mps-v2-20-10-ran14x18_1.opb
IDLAUNCH: 14795
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.080
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		: 451.080
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:        818972 kB
Buffers:          2980 kB
Cached:         189996 kB
SwapCached:        620 kB
Active:          31256 kB
Inactive:       164176 kB
HighTotal:      131008 kB
HighFree:        25256 kB
LowTotal:       903652 kB
LowFree:        793716 kB
SwapTotal:     2097892 kB
SwapFree:      2096776 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5652 kB
Slab:            14640 kB
Committed_AS:    63600 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-05-25 00:06:52 (client local time) WITH STATUS 20 IN 8.57969 SECONDS
stats: 14795 7 8.57969 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c INFO: OSL Context initialized.
c Initial problem consists of 7812 variables and 316 constraints.
s UNSATISFIABLE
c Exit Code: 20
c Total time: 8.555 s
#### 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): 0.86 0.95 0.90 2/54 10400
Raw data (stat): 10400 (runsolver) R 10399 4613 4612 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 834427326 1052672 99 4294967295 134512640 135381576 3221224480 3221219696 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+8.60223 s]
Raw data (loadavg): 0.96 0.97 0.91 1/53 10400
Raw data (stat): 10400 (runsolver) R 10399 4613 4612 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 834427326 1052672 99 4294967295 134512640 135381576 3221224480 3221219696 135158418 0 2147483391 7 90112 0 0 0 17 0 0 0
Raw data (statm): 257 99 215 215 0 42 0
vsize: 0

Child status: 20
Real time (s): 8.6016
CPU time (s): 8.57969
CPU user time (s): 8.40772
CPU system time (s): 0.171973
CPU usage (%): 99.7453
Max. virtual memory (Kb): 1028
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####