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-pilot.ja.opb
MD5SUM14008dcc965a2d6f0a6e83434c8b6300
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 230
Biggest coefficient in the objective function 694596606623744
Number of bits for the biggest coefficient in the objective function 50
Sum of the numbers in the objective function 4435721544887391
Number of bits of the sum of numbers in the objective function 52
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 benchmark1.75873
Number of variables45952
Total number of constraints1259
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 constraints1259
Minimum length of a constraint10
Maximum length of a constraint4005

Trace number 2765

Launcher Data

LAUNCH ON wulflinc19 THE 2005-09-18 21:42:32 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=3965 boxname=wulflinc19 idbench=449 idsolver=4 numberseed=0
MD5SUM SOLVER: 21c3ffd7205c96d5f0784fd273b92938  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  14008dcc965a2d6f0a6e83434c8b6300  /oldhome/oroussel/tmp/wulflinc19/normalized-mps-v2-20-10-pilot.ja.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc19/normalized-mps-v2-20-10-pilot.ja.opb
IDLAUNCH: 3965
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.037
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	: 890.88

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.037
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:        912144 kB
Buffers:         34672 kB
Cached:          60376 kB
SwapCached:        832 kB
Active:          68068 kB
Inactive:        29564 kB
HighTotal:      131008 kB
HighFree:        69860 kB
LowTotal:       903652 kB
LowFree:        842284 kB
SwapTotal:     2097892 kB
SwapFree:      2096460 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5700 kB
Slab:            19220 kB
Committed_AS:    64184 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-18 21:42:58 (client local time) WITH STATUS 20 IN 25.1232 SECONDS
stats: 3965 7 25.1232 20

Solver Data

c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc19/normalized-mps-v2-20-10-pilot.ja.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.109983

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/13749/stat): 13749 (PBS4) R 13748 13749 5929 0 -1 0 18 0 0 0 0 0 0 0 22 0 1 0 1844565306 978944 2 4294967295 134512640 135450776 3221224560 3221224560 134512960 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/13749/statm): 239 2 232 232 0 7 0
[pid=13749] vsize: 956
open syscall for file /dev/null
open syscall for file /oldhome/oroussel/tmp/wulflinc19/normalized-mps-v2-20-10-pilot.ja.opb
open syscall for file /oldhome/oroussel/tmp/wulflinc19/normalized-mps-v2-20-10-pilot.ja.opb

[startup+10.0029 s]
Raw data (loadavg): 0.89 0.97 0.94 2/56 13749
Raw data (/proc/13749/stat): 13749 (PBS4) R 13748 13749 5929 0 -1 0 3121 0 0 0 987 10 0 0 25 0 1 0 1844565306 13709312 3071 4294967295 134512640 135450776 3221224560 3221223072 134599250 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/13749/statm): 3347 3071 232 232 0 3115 0
[pid=13749] vsize: 13388
Current children cumulated CPU time (s) 9.97
Current children cumulated vsize (Kb) 13388

[startup+20.0058 s]
Raw data (loadavg): 0.90 0.97 0.94 2/56 13749
Raw data (/proc/13749/stat): 13749 (PBS4) R 13748 13749 5929 0 -1 0 3264 0 0 0 1984 13 0 0 25 0 1 0 1844565306 14163968 3214 4294967295 134512640 135450776 3221224560 3221223072 134600504 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/13749/statm): 3458 3214 232 232 0 3226 0
[pid=13749] vsize: 13832
Current children cumulated CPU time (s) 19.97
Current children cumulated vsize (Kb) 13832
One traced child (pid=13749) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 25.1665
CPU time (s): 25.1232
CPU user time (s): 24.8722
CPU system time (s): 0.250961
CPU usage (%): 99.828
Max. virtual memory (cumulated for all children) (Kb): 13832

Verifier Data

ERROR: no interpretation found !