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).
    Note that some very long lines in this section may be truncated by your web browser !
  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

Namemps-v2-20-10/ftp.netlib.org/lp/data/normalized-mps-v2-20-10-maros.opb
MD5SUMe0398e644ed8244eeb84fb20e0ca944b
Bench Categoryoptimization, big integers (OPTBIGINT)
Has Objective FunctionYES
Satisfiable
(Un)Satisfiability was proved
Best value of the objective function
Optimality of the best value was proved
Number of terms in the objective function 10110
Biggest coefficient in the objective function 330175610880000000
Number of bits for the biggest coefficient in the objective function 59
Sum of the numbers in the objective function -3512679628005298690
Number of bits of the sum of numbers in the objective function 64
Biggest number in a constraint 330175610880000000
Number of bits of the biggest number in a constraint 59
Biggest sum of numbers in a constraint -3512679628005298690
Number of bits of the biggest sum of numbers64
Best result obtained on this benchmark
Best CPU time to get the best result obtained on this benchmark
Number of variables42240
Total number of constraints844
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 constraints844
Minimum length of a constraint30
Maximum length of a constraint4740

Trace number 2758

Launcher Data

LAUNCH ON wulflinc30 THE 2005-09-18 21:41:51 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=3958 boxname=wulflinc30 idbench=442 idsolver=4 numberseed=0
MD5SUM SOLVER: 21c3ffd7205c96d5f0784fd273b92938  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  e0398e644ed8244eeb84fb20e0ca944b  /oldhome/oroussel/tmp/wulflinc30/normalized-mps-v2-20-10-maros.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc30/normalized-mps-v2-20-10-maros.opb
IDLAUNCH: 3958
/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	: 901.12

/proc/meminfo:
MemTotal:      1034660 kB
MemFree:        916896 kB
Buffers:         22852 kB
Cached:          64496 kB
SwapCached:        780 kB
Active:          36096 kB
Inactive:        53932 kB
HighTotal:      131008 kB
HighFree:        63476 kB
LowTotal:       903652 kB
LowFree:        853420 kB
SwapTotal:     2097892 kB
SwapFree:      2096636 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5732 kB
Slab:            22028 kB
Committed_AS:    64172 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-18 21:42:18 (client local time) WITH STATUS 20 IN 26.383 SECONDS
stats: 3958 7 26.383 20

Solver Data

c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc30/normalized-mps-v2-20-10-maros.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.092985

Watcher Data

Enforcing CPU limit (will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime (will send SIGXCPU) limit: 1230 seconds
Enforcing Stack size limit: 67108864 bytes
Enforcing memory limit (will send SIGTERM then SIGKILL): 921600 Kb
Enforcing VSIZE limit: 994918400 bytes
Current StackSize limit: 67108864 bytes
Raw data (/proc/15290/stat): 15290 (PBS4) R 15289 15290 5245 0 -1 0 18 0 0 0 0 0 0 0 22 0 1 0 1844564532 978944 2 4294967295 134512640 135450776 3221224560 3221224560 134512960 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/15290/statm): 239 2 232 232 0 7 0
[pid=15290] vsize: 956
open syscall for file /dev/null
open syscall for file /oldhome/oroussel/tmp/wulflinc30/normalized-mps-v2-20-10-maros.opb
open syscall for file /oldhome/oroussel/tmp/wulflinc30/normalized-mps-v2-20-10-maros.opb

[startup+10.0025 s]
Raw data (loadavg): 0.93 0.98 0.91 2/56 15290
Raw data (/proc/15290/stat): 15290 (PBS4) R 15289 15290 5245 0 -1 0 3137 0 0 0 988 10 0 0 25 0 1 0 1844564532 12230656 2727 4294967295 134512640 135450776 3221224560 3221223072 134600376 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/15290/statm): 2986 2727 232 232 0 2754 0
[pid=15290] vsize: 11944
Current children cumulated CPU time (s) 9.98
Current children cumulated vsize (Kb) 11944

[startup+20.0033 s]
Raw data (loadavg): 0.94 0.98 0.91 2/56 15290
Raw data (/proc/15290/stat): 15290 (PBS4) R 15289 15290 5245 0 -1 0 3951 0 0 0 1983 13 0 0 25 0 1 0 1844564532 15462400 3501 4294967295 134512640 135450776 3221224560 3221223072 134601209 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/15290/statm): 3775 3501 232 232 0 3543 0
[pid=15290] vsize: 15100
Current children cumulated CPU time (s) 19.96
Current children cumulated vsize (Kb) 15100
One traced child (pid=15290) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 26.4362
CPU time (s): 26.383
CPU user time (s): 26.138
CPU system time (s): 0.244962
CPU usage (%): 99.7986
Max. virtual memory (cumulated for all children) (Kb): 15100

Verifier Data

ERROR: no interpretation found !