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-pilotnov.opb
MD5SUM66be30d4f5bb7b279b4114fb6f1ff9f2
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 1890
Biggest coefficient in the objective function 477815111680000
Number of bits for the biggest coefficient in the objective function 49
Sum of the numbers in the objective function 19701657066014154
Number of bits of the sum of numbers in the objective function 55
Biggest number in a constraint 3141307404910592000000
Number of bits of the biggest number in a constraint 72
Biggest sum of numbers in a constraint 12713246235773393436672
Number of bits of the biggest sum of numbers74
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark8.71267
Number of variables54587
Total number of constraints1287
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 constraints1287
Minimum length of a constraint10
Maximum length of a constraint4520

Trace number 2764

Launcher Data

LAUNCH ON wulflinc30 THE 2005-09-18 21:42:27 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=3964 boxname=wulflinc30 idbench=448 idsolver=4 numberseed=0
MD5SUM SOLVER: 21c3ffd7205c96d5f0784fd273b92938  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  66be30d4f5bb7b279b4114fb6f1ff9f2  /oldhome/oroussel/tmp/wulflinc30/normalized-mps-v2-20-10-pilotnov.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc30/normalized-mps-v2-20-10-pilotnov.opb
IDLAUNCH: 3964
/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:        915880 kB
Buffers:         22868 kB
Cached:          65500 kB
SwapCached:        780 kB
Active:          36256 kB
Inactive:        54828 kB
HighTotal:      131008 kB
HighFree:        62412 kB
LowTotal:       903652 kB
LowFree:        853468 kB
SwapTotal:     2097892 kB
SwapFree:      2096636 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5732 kB
Slab:            21988 kB
Committed_AS:    64172 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-18 21:42:55 (client local time) WITH STATUS 20 IN 27.3238 SECONDS
stats: 3964 7 27.3238 20

Solver Data

c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc30/normalized-mps-v2-20-10-pilotnov.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.134979

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/15386/stat): 15386 (PBS4) R 15385 15386 5245 0 -1 0 26 0 0 0 0 0 0 0 23 0 1 0 1844568183 978944 10 4294967295 134512640 135450776 3221224560 3221223984 135139352 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/15386/statm): 239 10 232 232 0 7 0
[pid=15386] vsize: 956
open syscall for file /dev/null
open syscall for file /oldhome/oroussel/tmp/wulflinc30/normalized-mps-v2-20-10-pilotnov.opb
open syscall for file /oldhome/oroussel/tmp/wulflinc30/normalized-mps-v2-20-10-pilotnov.opb

[startup+10.0023 s]
Raw data (loadavg): 0.90 0.97 0.91 2/56 15386
Raw data (/proc/15386/stat): 15386 (PBS4) R 15385 15386 5245 0 -1 0 3297 0 0 0 987 9 0 0 25 0 1 0 1844568183 14303232 3247 4294967295 134512640 135450776 3221224560 3221222932 134524478 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/15386/statm): 3492 3247 232 232 0 3260 0
[pid=15386] vsize: 13968
Current children cumulated CPU time (s) 9.96
Current children cumulated vsize (Kb) 13968

[startup+20.0031 s]
Raw data (loadavg): 0.92 0.97 0.91 2/56 15386
Raw data (/proc/15386/stat): 15386 (PBS4) R 15385 15386 5245 0 -1 0 4022 0 0 0 1983 13 0 0 25 0 1 0 1844568183 17285120 3972 4294967295 134512640 135450776 3221224560 3221223072 134600407 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/15386/statm): 4220 3972 232 232 0 3988 0
[pid=15386] vsize: 16880
Current children cumulated CPU time (s) 19.96
Current children cumulated vsize (Kb) 16880
One traced child (pid=15386) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 27.3924
CPU time (s): 27.3238
CPU user time (s): 27.0719
CPU system time (s): 0.251961
CPU usage (%): 99.7499
Max. virtual memory (cumulated for all children) (Kb): 16880

Verifier Data

ERROR: no interpretation found !