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-v2-13-7/MIPLIB/miplib/normalized-mps-v2-13-7-qiu.opb
MD5SUM3d2c1e8e1ac719fa835886a3b753eac3
Bench Categoryoptimization, big integers (OPTBIGINT)
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 5328
Biggest coefficient in the objective function 8885108736
Number of bits for the biggest coefficient in the objective function 34
Sum of the numbers in the objective function 4692033563496
Number of bits of the sum of numbers in the objective function 43
Biggest number in a constraint 8885108736
Number of bits of the biggest number in a constraint 34
Biggest sum of numbers in a constraint 4692033563496
Number of bits of the biggest sum of numbers43
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark98.758
Number of variables15888
Total number of constraints1192
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 constraints1192
Minimum length of a constraint21
Maximum length of a constraint3960

Trace number 6545

Launcher Data

LAUNCH ON wulflinc11 THE 2005-09-20 07:41:42 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=4437 boxname=wulflinc11 idbench=921 idsolver=4 numberseed=0
MD5SUM SOLVER: 21c3ffd7205c96d5f0784fd273b92938  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  3d2c1e8e1ac719fa835886a3b753eac3  /oldhome/oroussel/tmp/wulflinc11/normalized-mps-v2-13-7-qiu.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc11/normalized-mps-v2-13-7-qiu.opb
IDLAUNCH: 4437
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.028
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	: 2
cpu MHz		: 451.028
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:        852096 kB
Buffers:         32856 kB
Cached:         122900 kB
SwapCached:        916 kB
Active:          52372 kB
Inactive:       105944 kB
HighTotal:      131008 kB
HighFree:        12684 kB
LowTotal:       903652 kB
LowFree:        839412 kB
SwapTotal:     2097136 kB
SwapFree:      2095640 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5664 kB
Slab:            18592 kB
Committed_AS:    64168 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1364 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-20 07:42:04 (client local time) WITH STATUS 20 IN 21.8257 SECONDS
stats: 4437 7 21.8257 20

Solver Data

c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc11/normalized-mps-v2-13-7-qiu.opb ......
s UNSATISFIABLE
c Done, CPU Time=16.5405

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/1636/stat): 1636 (PBS4) R 1635 1636 9854 0 -1 0 18 0 0 0 0 0 0 0 22 0 1 0 1798586493 978944 2 4294967295 134512640 135450776 3221224560 3221224560 134512960 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/1636/statm): 239 2 232 232 0 7 0
[pid=1636] vsize: 956
open syscall for file /dev/null
open syscall for file /oldhome/oroussel/tmp/wulflinc11/normalized-mps-v2-13-7-qiu.opb
open syscall for file /oldhome/oroussel/tmp/wulflinc11/normalized-mps-v2-13-7-qiu.opb

[startup+10.003 s]
Raw data (loadavg): 0.93 0.97 0.94 2/56 1636
Raw data (/proc/1636/stat): 1636 (PBS4) R 1635 1636 9854 0 -1 0 2087 0 0 0 984 9 0 0 25 0 1 0 1798586493 9666560 1697 4294967295 134512640 135450776 3221224560 3221223280 134538944 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/1636/statm): 2360 1697 232 232 0 2128 0
[pid=1636] vsize: 9440
Current children cumulated CPU time (s) 9.93
Current children cumulated vsize (Kb) 9440

[startup+20.0028 s]
Raw data (loadavg): 0.94 0.97 0.94 2/56 1636
Raw data (/proc/1636/stat): 1636 (PBS4) R 1635 1636 9854 0 -1 0 2461 0 0 0 1969 17 0 0 25 0 1 0 1798586493 12812288 2071 4294967295 134512640 135450776 3221224560 3221223280 134538944 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/1636/statm): 3128 2071 232 232 0 2896 0
[pid=1636] vsize: 12512
Current children cumulated CPU time (s) 19.86
Current children cumulated vsize (Kb) 12512
One traced child (pid=1636) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 21.9784
CPU time (s): 21.8257
CPU user time (s): 21.6367
CPU system time (s): 0.188971
CPU usage (%): 99.3053
Max. virtual memory (cumulated for all children) (Kb): 12512

Verifier Data

ERROR: no interpretation found !