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/plato.asu.edu/pub/milp/normalized-mps-v2-13-7-bienst2.opb
MD5SUM3c3e6264ad2029dcb2dc81be78ef5988
Bench Categoryoptimization, medium integers (OPTMEDINT)
Has Objective FunctionYES
SatisfiableNO
(Un)Satisfiability was proved
Best value of the objective function
Optimality of the best value was proved
Number of terms in the objective function 20
Biggest coefficient in the objective function 524288
Number of bits for the biggest coefficient in the objective function 20
Sum of the numbers in the objective function 1048575
Number of bits of the sum of numbers in the objective function 20
Biggest number in a constraint 524288
Number of bits of the biggest number in a constraint 20
Biggest sum of numbers in a constraint 13633395
Number of bits of the biggest sum of numbers24
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark103.29
Number of variables9183
Total number of constraints632
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)40
Number of constraints which are nor clauses,nor cardinality constraints592
Minimum length of a constraint1
Maximum length of a constraint260

Trace number 14704 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc20 THE 2005-04-21 01:10:26 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=19428 boxname=wulflinc20 idbench=1495 idsolver=6 numberseed=0
MD5SUM SOLVER: 2225cba0d9b2c30e235f6cafc823d7ac  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  3c3e6264ad2029dcb2dc81be78ef5988  /oldhome/oroussel/tmp/wulflinc20/normalized-mps-v2-13-7-bienst2.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc20/normalized-mps-v2-13-7-bienst2.opb
IDLAUNCH: 19428
/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:        835800 kB
Buffers:         12320 kB
Cached:         161912 kB
SwapCached:        528 kB
Active:          27312 kB
Inactive:       148948 kB
HighTotal:      131008 kB
HighFree:        47124 kB
LowTotal:       903652 kB
LowFree:        788676 kB
SwapTotal:     2097892 kB
SwapFree:      2096468 kB
Dirty:              40 kB
Writeback:           0 kB
Mapped:           5112 kB
Slab:            16776 kB
Committed_AS:    63596 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-04-21 01:12:10 (client local time) WITH STATUS 20 IN 103.29 SECONDS
stats: 19428 7 103.29 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc20/normalized-mps-v2-13-7-bienst2.opb ......
s UNSATISFIABLE
c Done, CPU Time=102.43
#### 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): 0.93 0.98 0.94 2/54 26778
Raw data (stat): 26778 (runsolver) R 26777 27565 27564 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 541011809 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+10.0005 s]
Raw data (loadavg): 0.94 0.98 0.94 2/54 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1397 0 0 0 994 4 0 0 25 0 1 0 541011809 6881280 1177 4294967295 134512640 135450300 3221224624 3221222976 134533221 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 1680 1177 231 231 0 1449 0
vsize: 6720
[startup+20.0002 s]
Raw data (loadavg): 0.95 0.98 0.94 2/54 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1539 0 0 0 1993 5 0 0 25 0 1 0 541011809 7143424 1319 4294967295 134512640 135450300 3221224624 3221223360 134537987 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 1744 1319 231 231 0 1513 0
vsize: 6976
[startup+30.0006 s]
Raw data (loadavg): 0.95 0.98 0.94 2/54 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1606 0 0 0 2993 6 0 0 25 0 1 0 541011809 7278592 1386 4294967295 134512640 135450300 3221224624 3221223232 134537654 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 1777 1386 231 231 0 1546 0
vsize: 7108
[startup+40.0006 s]
Raw data (loadavg): 0.96 0.98 0.94 2/54 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1647 0 0 0 3992 7 0 0 25 0 1 0 541011809 7606272 1427 4294967295 134512640 135450300 3221224624 3221222976 134533216 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 1857 1427 231 231 0 1626 0
vsize: 7428
[startup+50.0001 s]
Raw data (loadavg): 0.97 0.98 0.94 2/54 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1650 0 0 0 4992 7 0 0 25 0 1 0 541011809 7606272 1430 4294967295 134512640 135450300 3221224624 3221223232 134537659 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 1857 1430 231 231 0 1626 0
vsize: 7428
[startup+60.0001 s]
Raw data (loadavg): 0.97 0.98 0.94 2/54 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1661 0 0 0 5991 8 0 0 25 0 1 0 541011809 7606272 1441 4294967295 134512640 135450300 3221224624 3221223232 134537613 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 1857 1441 231 231 0 1626 0
vsize: 7428
[startup+69.9999 s]
Raw data (loadavg): 0.97 0.98 0.94 2/54 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1687 0 0 0 6990 9 0 0 25 0 1 0 541011809 7606272 1467 4294967295 134512640 135450300 3221224624 3221223440 134547175 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 1857 1467 231 231 0 1626 0
vsize: 7428
[startup+80.0003 s]
Raw data (loadavg): 0.98 0.98 0.94 2/54 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1750 0 0 0 7989 10 0 0 25 0 1 0 541011809 8777728 1530 4294967295 134512640 135450300 3221224624 3221223500 135126769 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 2143 1530 231 231 0 1912 0
vsize: 8572
[startup+90.0003 s]
Raw data (loadavg): 0.98 0.98 0.94 2/54 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1814 0 0 0 8989 11 0 0 25 0 1 0 541011809 8777728 1594 4294967295 134512640 135450300 3221224624 3221223500 135126769 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 2143 1594 231 231 0 1912 0
vsize: 8572
[startup+100 s]
Raw data (loadavg): 0.98 0.98 0.94 2/54 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1884 0 0 0 9987 12 0 0 25 0 1 0 541011809 8978432 1664 4294967295 134512640 135450300 3221224624 3221223232 134537603 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 2192 1664 231 231 0 1961 0
vsize: 8768
[startup+103.283 s]
Raw data (loadavg): 0.98 0.98 0.94 1/53 26778
Raw data (stat): 26778 (PBS4) R 26777 27565 27564 0 -1 0 1884 0 0 0 9987 12 0 0 25 0 1 0 541011809 8978432 1664 4294967295 134512640 135450300 3221224624 3221223232 134537603 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 2192 1664 231 231 0 1961 0
vsize: 0

Child status: 20
Real time (s): 103.282
CPU time (s): 103.29
CPU user time (s): 103.154
CPU system time (s): 0.135979
CPU usage (%): 100.008
Max. virtual memory (Kb): 8768
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####