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-fffff800.opb
MD5SUM41762d7ce490e5551e5099dd159735cc
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 240
Biggest coefficient in the objective function 536870912
Number of bits for the biggest coefficient in the objective function 30
Sum of the numbers in the objective function 8589934584
Number of bits of the sum of numbers in the objective function 33
Biggest number in a constraint -2340616713709551616
Number of bits of the biggest number in a constraint 64
Biggest sum of numbers in a constraint 392918753328864690176
Number of bits of the biggest sum of numbers69
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark43.5764
Number of variables25620
Total number of constraints524
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 constraints524
Minimum length of a constraint30
Maximum length of a constraint7530

Trace number 2740

Launcher Data

LAUNCH ON wulflinc15 THE 2005-09-18 21:36:24 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=3942 boxname=wulflinc15 idbench=426 idsolver=4 numberseed=0
MD5SUM SOLVER: 21c3ffd7205c96d5f0784fd273b92938  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  41762d7ce490e5551e5099dd159735cc  /oldhome/oroussel/tmp/wulflinc15/normalized-mps-v2-20-10-fffff800.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc15/normalized-mps-v2-20-10-fffff800.opb
IDLAUNCH: 3942
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 450.999
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	: 2
cpu MHz		: 450.999
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:        908180 kB
Buffers:         33900 kB
Cached:          63192 kB
SwapCached:        692 kB
Active:          63336 kB
Inactive:        36408 kB
HighTotal:      131008 kB
HighFree:        64624 kB
LowTotal:       903652 kB
LowFree:        843556 kB
SwapTotal:     2097136 kB
SwapFree:      2095920 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5732 kB
Slab:            20916 kB
Committed_AS:    64140 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1364 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-18 21:36:50 (client local time) WITH STATUS 20 IN 25.8161 SECONDS
stats: 3942 7 25.8161 20

Solver Data

c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc15/normalized-mps-v2-20-10-fffff800.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.055991

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/12603/stat): 12603 (PBS4) R 12602 12603 31778 0 -1 0 18 0 0 0 0 0 0 0 23 0 1 0 1786307204 978944 2 4294967295 134512640 135450776 3221224560 3221224560 134512960 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/12603/statm): 239 2 232 232 0 7 0
[pid=12603] vsize: 956
open syscall for file /dev/null
open syscall for file /oldhome/oroussel/tmp/wulflinc15/normalized-mps-v2-20-10-fffff800.opb
open syscall for file /oldhome/oroussel/tmp/wulflinc15/normalized-mps-v2-20-10-fffff800.opb

[startup+10.0032 s]
Raw data (loadavg): 0.93 0.96 0.96 2/56 12603
Raw data (/proc/12603/stat): 12603 (PBS4) R 12602 12603 31778 0 -1 0 2019 0 0 0 992 5 0 0 25 0 1 0 1786307204 8843264 1928 4294967295 134512640 135450776 3221224560 3221223072 134600511 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/12603/statm): 2159 1928 232 232 0 1927 0
[pid=12603] vsize: 8636
Current children cumulated CPU time (s) 9.97
Current children cumulated vsize (Kb) 8636

[startup+20.004 s]
Raw data (loadavg): 0.94 0.96 0.96 2/56 12603
Raw data (/proc/12603/stat): 12603 (PBS4) R 12602 12603 31778 0 -1 0 2836 0 0 0 1986 10 0 0 25 0 1 0 1786307204 12161024 2745 4294967295 134512640 135450776 3221224560 3221223072 134600412 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/12603/statm): 2969 2745 232 232 0 2737 0
[pid=12603] vsize: 11876
Current children cumulated CPU time (s) 19.96
Current children cumulated vsize (Kb) 11876
One traced child (pid=12603) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 25.8593
CPU time (s): 25.8161
CPU user time (s): 25.6701
CPU system time (s): 0.145977
CPU usage (%): 99.833
Max. virtual memory (cumulated for all children) (Kb): 11876

Verifier Data

ERROR: no interpretation found !