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).
  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

Namenormalized-opb/mps-v2-13-7/MIPLIB/miplib3/normalized-mps-v2-13-7-qnet1_o.opb
MD5SUM1663d824f64922ec9a31929abe96b909
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 2480
Biggest coefficient in the objective function 524288
Number of bits for the biggest coefficient in the objective function 20
Sum of the numbers in the objective function 130023300
Number of bits of the sum of numbers in the objective function 27
Biggest number in a constraint 20945120000
Number of bits of the biggest number in a constraint 35
Biggest sum of numbers in a constraint 59755435295
Number of bits of the biggest sum of numbers36
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.047992
Number of variables4140
Total number of constraints585
Number of constraints which are clauses32
Number of constraints which are cardinality constraints (but not clauses)48
Number of constraints which are nor clauses,nor cardinality constraints505
Minimum length of a constraint2
Maximum length of a constraint54

Trace number 42927 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc6 THE 2005-06-16 18:49:23 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=26148 boxname=wulflinc6 idbench=1448 idsolver=18 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  1663d824f64922ec9a31929abe96b909  /oldhome/oroussel/tmp/wulflinc6/normalized-mps-v2-13-7-qnet1_o.opb
REAL COMMAND:  pb2sat-v2 /oldhome/oroussel/tmp/wulflinc6/normalized-mps-v2-13-7-qnet1_o.opb
IDLAUNCH: 26148
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.042
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		: 451.042
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:        686244 kB
Buffers:         25960 kB
Cached:         299784 kB
SwapCached:        996 kB
Active:          28012 kB
Inactive:       299848 kB
HighTotal:      131008 kB
HighFree:         9968 kB
LowTotal:       903652 kB
LowFree:        676276 kB
SwapTotal:     2097136 kB
SwapFree:      2095200 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5092 kB
Slab:            14844 kB
Committed_AS:    63832 kB
PageTables:        320 kB
VmallocTotal:   114680 kB
VmallocUsed:      1364 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-06-16 18:50:06 (client local time) WITH STATUS 20 IN 42.9905 SECONDS
stats: 26148 7 42.9905 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c This solver internally uses Chaff 2004.11.15 Simplified
c running zchaff...
s UNSATISFIABLE
#### END SOLVER DATA ####
#### BEGIN WATCHER DATA ####
Enforcing CPU limit (will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime (will send SIGXCPU) limit: 1230 seconds
Enforcing VSIZE limit: 943718400 bytes
Enforcing Stack size limit: 67108864 bytes
Current StackSize limit: 67108864 bytes
Raw data (loadavg): 0.81 0.92 0.90 2/54 25062
Raw data (stat): 25062 (runsolver) R 25061 25568 25567 0 -1 64 8 0 0 0 0 0 0 0 19 0 1 0 973049692 884736 94 4294967295 134512640 135332820 3221224464 3221219644 135092226 0 2147483391 7 90112 0 0 0 17 0 0 0
Raw data (statm): 216 94 205 205 0 11 0
vsize: 864
[startup+10.0007 s]
Raw data (loadavg): 0.84 0.92 0.90 2/54 25062
Raw data (stat): 25062 (pb2sat-v2) R 25061 25568 25567 0 -1 0 14670 0 0 0 961 37 0 0 25 0 1 0 973049692 43388928 8919 4294967295 134512640 135730672 3221224576 3221223072 134747516 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 10593 8919 301 301 0 10292 0
vsize: 42372
[startup+20.0013 s]
Raw data (loadavg): 0.86 0.93 0.90 2/54 25062
Raw data (stat): 25062 (pb2sat-v2) R 25061 25568 25567 0 -1 0 14984 0 0 0 1959 40 0 0 25 0 1 0 973049692 44498944 9233 4294967295 134512640 135730672 3221224576 3221223072 134747808 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 10864 9233 301 301 0 10563 0
vsize: 43456
[startup+30.0024 s]
Raw data (loadavg): 0.88 0.93 0.90 2/54 25062
Raw data (stat): 25062 (pb2sat-v2) R 25061 25568 25567 0 -1 0 15295 0 0 0 2956 43 0 0 25 0 1 0 973049692 45838336 9511 4294967295 134512640 135730672 3221224576 3221223184 134744917 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 11191 9511 301 301 0 10890 0
vsize: 44764
[startup+40.002 s]
Raw data (loadavg): 0.90 0.93 0.90 2/54 25062
Raw data (stat): 25062 (pb2sat-v2) R 25061 25568 25567 0 -1 0 15433 0 0 0 3955 45 0 0 25 0 1 0 973049692 46288896 9649 4294967295 134512640 135730672 3221224576 3221222896 134732476 0 0 7 16384 0 0 0 17 1 0 0
Raw data (statm): 11301 9649 301 301 0 11000 0
vsize: 45204
[startup+42.991 s]
Raw data (loadavg): 0.90 0.93 0.90 1/53 25062
Raw data (stat): 25062 (pb2sat-v2) R 25061 25568 25567 0 -1 0 15433 0 0 0 3955 45 0 0 25 0 1 0 973049692 46288896 9649 4294967295 134512640 135730672 3221224576 3221222896 134732476 0 0 7 16384 0 0 0 17 1 0 0
Raw data (statm): 11301 9649 301 301 0 11000 0
vsize: 0

Child status: 20
Real time (s): 42.9904
CPU time (s): 42.9905
CPU user time (s): 42.5105
CPU system time (s): 0.479927
CPU usage (%): 100
Max. virtual memory (Kb): 45204
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####