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-v2-20-10/MIPLIB/miplib3/normalized-mps-v2-20-10-vpm1.opb
MD5SUMeb50800dc2fc522dd2f29a347fbab1da
Bench Categoryoptimization, medium integers (OPTMEDINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 20
Optimality of the best value was proved NO
Number of terms in the objective function 168
Biggest coefficient in the objective function 1
Number of bits for the biggest coefficient in the objective function 1
Sum of the numbers in the objective function 168
Number of bits of the sum of numbers in the objective function 8
Biggest number in a constraint 819200
Number of bits of the biggest number in a constraint 20
Biggest sum of numbers in a constraint 4941871
Number of bits of the biggest sum of numbers23
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark454.966
Number of variables2754
Total number of constraints612
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)168
Number of constraints which are nor clauses,nor cardinality constraints444
Minimum length of a constraint1
Maximum length of a constraint82

Trace number 20913 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc4 THE 2005-04-21 22:30:54 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=13942 boxname=wulflinc4 idbench=1073 idsolver=6 numberseed=0
MD5SUM SOLVER: 2225cba0d9b2c30e235f6cafc823d7ac  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  eb50800dc2fc522dd2f29a347fbab1da  /oldhome/oroussel/tmp/wulflinc4/normalized-mps-v2-20-10-vpm1.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc4/normalized-mps-v2-20-10-vpm1.opb
IDLAUNCH: 13942
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.169
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		: 451.169
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:        592728 kB
Buffers:         31852 kB
Cached:         388568 kB
SwapCached:        364 kB
Active:          99480 kB
Inactive:       323436 kB
HighTotal:      131008 kB
HighFree:          252 kB
LowTotal:       903652 kB
LowFree:        592476 kB
SwapTotal:     2097136 kB
SwapFree:      2096356 kB
Dirty:              40 kB
Writeback:           0 kB
Mapped:           6404 kB
Slab:            13172 kB
Committed_AS:    71788 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1388 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-04-21 22:31:01 (client local time) WITH STATUS 20 IN 7.34488 SECONDS
stats: 13942 7 7.34488 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc4/normalized-mps-v2-20-10-vpm1.opb ......
s UNSATISFIABLE
c Done, CPU Time=7.04393
#### 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
Raw data (loadavg): 0.85 0.94 0.93 2/54 18500
Raw data (stat): 18500 (runsolver) R 18499 5897 5896 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 490470432 1052672 99 4294967295 134512640 135381576 3221224528 3221219776 135158418 0 2147483391 7 90112 0 0 0 17 1 0 0
Raw data (statm): 257 99 215 215 0 42 0
vsize: 1028
[startup+7.35209 s]
Raw data (loadavg): 0.87 0.94 0.93 1/53 18500
Raw data (stat): 18500 (runsolver) R 18499 5897 5896 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 490470432 1052672 99 4294967295 134512640 135381576 3221224528 3221219776 135158418 0 2147483391 7 90112 0 0 0 17 1 0 0
Raw data (statm): 257 99 215 215 0 42 0
vsize: 0

Child status: 20
Real time (s): 7.35181
CPU time (s): 7.34488
CPU user time (s): 7.27489
CPU system time (s): 0.069989
CPU usage (%): 99.9057
Max. virtual memory (Kb): 1028
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####