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-neos13.opb
MD5SUMcf076aa1d04c57dc685f8035f0968734
Bench Categoryoptimization, big integers (OPTBIGINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function -1358524
Optimality of the best value was proved NO
Number of terms in the objective function 120
Biggest coefficient in the objective function 103558656
Number of bits for the biggest coefficient in the objective function 27
Sum of the numbers in the objective function 2282563635
Number of bits of the sum of numbers in the objective function 32
Biggest number in a constraint 69966336000
Number of bits of the biggest number in a constraint 37
Biggest sum of numbers in a constraint 636991772142
Number of bits of the biggest sum of numbers40
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark517.452
Number of variables1935
Total number of constraints22679
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)1816
Number of constraints which are nor clauses,nor cardinality constraints20863
Minimum length of a constraint1
Maximum length of a constraint1815

Trace number 13480 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc20 THE 2005-04-20 21:12:08 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=14553 boxname=wulflinc20 idbench=1120 idsolver=6 numberseed=0
MD5SUM SOLVER: 2225cba0d9b2c30e235f6cafc823d7ac  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  cf076aa1d04c57dc685f8035f0968734  /oldhome/oroussel/tmp/wulflinc20/normalized-mps-v2-20-10-neos13.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc20/normalized-mps-v2-20-10-neos13.opb
IDLAUNCH: 14553
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.215
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		: 451.215
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	: 901.12

/proc/meminfo:
MemTotal:      1034660 kB
MemFree:        686120 kB
Buffers:         33704 kB
Cached:         288768 kB
SwapCached:        528 kB
Active:         208016 kB
Inactive:       116460 kB
HighTotal:      131008 kB
HighFree:          252 kB
LowTotal:       903652 kB
LowFree:        685868 kB
SwapTotal:     2097892 kB
SwapFree:      2096468 kB
Dirty:               4 kB
Writeback:           0 kB
Mapped:           5112 kB
Slab:            18284 kB
Committed_AS:    63596 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-04-20 21:12:53 (client local time) WITH STATUS 20 IN 43.7144 SECONDS
stats: 14553 7 43.7144 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc20/normalized-mps-v2-20-10-neos13.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.001999
#### 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): 0.87 0.91 0.89 2/54 22919
Raw data (stat): 22919 (runsolver) R 22918 27565 27564 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 539581942 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+10.0004 s]
Raw data (loadavg): 0.89 0.91 0.89 2/54 22919
Raw data (stat): 22919 (PBS4) R 22918 27565 27564 0 -1 0 2055 0 0 0 987 11 0 0 25 0 1 0 539581942 9392128 2051 4294967295 134512640 135450300 3221224624 3221157424 134599680 0 0 7 0 0 0 0 17 1 0 0
Raw data (statm): 2293 2051 231 231 0 2062 0
vsize: 9172
[startup+20.0006 s]
Raw data (loadavg): 0.90 0.92 0.89 2/54 22919
Raw data (stat): 22919 (PBS4) R 22918 27565 27564 0 -1 0 3901 0 0 0 1975 22 0 0 25 0 1 0 539581942 16797696 3844 4294967295 134512640 135450300 3221224624 3221157360 134855183 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 4101 3844 231 231 0 3870 0
vsize: 16404
[startup+30.0003 s]
Raw data (loadavg): 0.92 0.92 0.89 2/54 22919
Raw data (stat): 22919 (PBS4) R 22918 27565 27564 0 -1 0 4507 0 0 0 2966 31 0 0 25 0 1 0 539581942 19824640 4450 4294967295 134512640 135450300 3221224624 3221157488 134515471 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 4840 4450 231 231 0 4609 0
vsize: 19360
[startup+40.1022 s]
Raw data (loadavg): 0.93 0.92 0.89 2/54 22919
Raw data (stat): 22919 (PBS4) R 22918 27565 27564 0 -1 0 7631 0 0 0 3964 44 0 0 25 0 1 0 539581942 32145408 7469 4294967295 134512640 135450300 3221224624 3221157220 134524073 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 7848 7469 231 231 0 7617 0
vsize: 31392
[startup+43.7329 s]
Raw data (loadavg): 0.94 0.92 0.89 1/53 22919
Raw data (stat): 22919 (PBS4) R 22918 27565 27564 0 -1 0 7631 0 0 0 3964 44 0 0 25 0 1 0 539581942 32145408 7469 4294967295 134512640 135450300 3221224624 3221157220 134524073 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 7848 7469 231 231 0 7617 0
vsize: 0

Child status: 20
Real time (s): 43.7326
CPU time (s): 43.7144
CPU user time (s): 43.2194
CPU system time (s): 0.494924
CPU usage (%): 99.9584
Max. virtual memory (Kb): 31392
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####