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/plato.asu.edu/pub/milp/normalized-mps-v2-20-10-neos4.opb
MD5SUMe465af1c9ec9e748a7782ddbee36d3b1
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 100590
Biggest coefficient in the objective function 11202704073084108800000000
Number of bits for the biggest coefficient in the objective function 84
Sum of the numbers in the objective function 2862789126208280618841669632
Number of bits of the sum of numbers in the objective function 92
Biggest number in a constraint 11202704073084108800000000
Number of bits of the biggest number in a constraint 84
Biggest sum of numbers in a constraint 2862789126208280618841669632
Number of bits of the biggest sum of numbers92
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark36.5274
Number of variables203044
Total number of constraints56505
Number of constraints which are clauses32142
Number of constraints which are cardinality constraints (but not clauses)17175
Number of constraints which are nor clauses,nor cardinality constraints7188
Minimum length of a constraint1
Maximum length of a constraint1115

Trace number 6354

Launcher Data

LAUNCH ON wulflinc23 THE 2005-09-20 06:08:27 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=4246 boxname=wulflinc23 idbench=730 idsolver=4 numberseed=0
MD5SUM SOLVER: 21c3ffd7205c96d5f0784fd273b92938  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  e465af1c9ec9e748a7782ddbee36d3b1  /oldhome/oroussel/tmp/wulflinc23/normalized-mps-v2-20-10-neos4.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc23/normalized-mps-v2-20-10-neos4.opb
IDLAUNCH: 4246
/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:        874484 kB
Buffers:         19028 kB
Cached:         112936 kB
SwapCached:        840 kB
Active:          56800 kB
Inactive:        77868 kB
HighTotal:      131008 kB
HighFree:        17304 kB
LowTotal:       903652 kB
LowFree:        857180 kB
SwapTotal:     2097136 kB
SwapFree:      2095788 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5668 kB
Slab:            19748 kB
Committed_AS:    64168 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1364 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-20 06:08:29 (client local time) WITH STATUS 0 IN 1.19282 SECONDS
stats: 4246 7 1.19282 0

Solver Data

c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc23/normalized-mps-v2-20-10-neos4.opb ......
PBS4: sat_solver.cpp:202: void parse_obj_fct(vnumcoeff&, char&, long long int&, long long int&): Assertion `coeff !=0' failed.

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/28357/stat): 28357 (PBS4) R 28356 28357 5299 0 -1 0 18 0 0 0 0 0 0 0 22 0 1 0 1856269023 978944 2 4294967295 134512640 135450776 3221224560 3221224560 134512960 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/28357/statm): 239 2 232 232 0 7 0
[pid=28357] vsize: 956
open syscall for file /dev/null
open syscall for file /oldhome/oroussel/tmp/wulflinc23/normalized-mps-v2-20-10-neos4.opb
open syscall for file /oldhome/oroussel/tmp/wulflinc23/normalized-mps-v2-20-10-neos4.opb
One traced child (pid=28357) ended because it received signal 6 (SIGABRT)
All traced children have exited ! Game is over.

Child ended because it received signal 6 (SIGABRT)
Real time (s): 1.21024
CPU time (s): 1.19282
CPU user time (s): 0.979851
CPU system time (s): 0.212967
CPU usage (%): 98.5608
Max. virtual memory (cumulated for all children) (Kb): 0

Verifier Data

ERROR: no interpretation found !