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-nug08.opb
MD5SUMc527241c4d9537dec2ef265de58c54af
Bench Categoryoptimization, medium integers (OPTMEDINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 107
Optimality of the best value was proved NO
Number of terms in the objective function 20160
Biggest coefficient in the objective function 20971520
Number of bits for the biggest coefficient in the objective function 25
Sum of the numbers in the objective function 9042910800
Number of bits of the sum of numbers in the objective function 34
Biggest number in a constraint 20971520
Number of bits of the biggest number in a constraint 25
Biggest sum of numbers in a constraint 9042910800
Number of bits of the biggest sum of numbers34
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark922.173
Number of variables32640
Total number of constraints912
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 constraints912
Minimum length of a constraint160
Maximum length of a constraint160

Trace number 20460 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc17 THE 2005-04-21 21:25:36 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=14774 boxname=wulflinc17 idbench=1137 idsolver=6 numberseed=0
MD5SUM SOLVER: 2225cba0d9b2c30e235f6cafc823d7ac  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  c527241c4d9537dec2ef265de58c54af  /oldhome/oroussel/tmp/wulflinc17/normalized-mps-v2-20-10-nug08.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc17/normalized-mps-v2-20-10-nug08.opb
IDLAUNCH: 14774
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.072
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	: 3
cpu MHz		: 451.072
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:        517288 kB
Buffers:         25036 kB
Cached:         466060 kB
SwapCached:        408 kB
Active:         123948 kB
Inactive:       369668 kB
HighTotal:      131008 kB
HighFree:          252 kB
LowTotal:       903652 kB
LowFree:        517036 kB
SwapTotal:     2097892 kB
SwapFree:      2097056 kB
Dirty:              40 kB
Writeback:           0 kB
Mapped:           5860 kB
Slab:            18064 kB
Committed_AS:    63820 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-04-21 21:25:36 (client local time) WITH STATUS 20 IN 0.278957 SECONDS
stats: 14774 7 0.278957 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc17/normalized-mps-v2-20-10-nug08.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.097986
#### 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 0.97 0.95 2/55 5706
Raw data (stat): 5706 (runsolver) R 5705 20838 20837 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 548312630 1052672 99 4294967295 134512640 135381576 3221224528 3221219776 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+0.28404 s]
Raw data (loadavg): 0.87 0.97 0.95 1/54 5706
Raw data (stat): 5706 (runsolver) R 5705 20838 20837 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 548312630 1052672 99 4294967295 134512640 135381576 3221224528 3221219776 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 status: 20
Real time (s): 0.283744
CPU time (s): 0.278957
CPU user time (s): 0.216967
CPU system time (s): 0.06199
CPU usage (%): 98.3129
Max. virtual memory (Kb): 1028
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####