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/ftp.netlib.org/lp/data/normalized-mps-v2-13-7-scsd8.opb
MD5SUM489cca8508801e1a27a21414584e0af6
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 55000
Biggest coefficient in the objective function 216169480454144
Number of bits for the biggest coefficient in the objective function 48
Sum of the numbers in the objective function 581831637603140100
Number of bits of the sum of numbers in the objective function 60
Biggest number in a constraint 216169480454144
Number of bits of the biggest number in a constraint 48
Biggest sum of numbers in a constraint 581831637603140100
Number of bits of the biggest sum of numbers60
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.481926
Number of variables55000
Total number of constraints397
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 constraints397
Minimum length of a constraint200
Maximum length of a constraint480

Trace number 19481 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc1 THE 2005-04-21 19:29:47 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=16295 boxname=wulflinc1 idbench=1254 idsolver=6 numberseed=0
MD5SUM SOLVER: 2225cba0d9b2c30e235f6cafc823d7ac  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  489cca8508801e1a27a21414584e0af6  /oldhome/oroussel/tmp/wulflinc1/normalized-mps-v2-13-7-scsd8.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc1/normalized-mps-v2-13-7-scsd8.opb
IDLAUNCH: 16295
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.053
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		: 451.053
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:        661760 kB
Buffers:          9048 kB
Cached:         337888 kB
SwapCached:          0 kB
Active:          73524 kB
Inactive:       276528 kB
HighTotal:      131008 kB
HighFree:          252 kB
LowTotal:       903652 kB
LowFree:        661508 kB
SwapTotal:     2097136 kB
SwapFree:      2096968 kB
Dirty:              48 kB
Writeback:           0 kB
Mapped:           7224 kB
Slab:            16952 kB
Committed_AS:    92820 kB
PageTables:        344 kB
VmallocTotal:   114680 kB
VmallocUsed:      1388 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-04-21 19:29:48 (client local time) WITH STATUS 20 IN 0.481926 SECONDS
stats: 16295 7 0.481926 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc1/normalized-mps-v2-13-7-scsd8.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.176974
#### 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 0.97 0.94 2/56 532
Raw data (stat): 532 (runsolver) R 531 12452 12451 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 432533057 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+0.485506 s]
Raw data (loadavg): 0.85 0.97 0.94 1/55 532
Raw data (stat): 532 (runsolver) R 531 12452 12451 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 432533057 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): 0.485223
CPU time (s): 0.481926
CPU user time (s): 0.400939
CPU system time (s): 0.080987
CPU usage (%): 99.3205
Max. virtual memory (Kb): 1028
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####