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/ftp.netlib.org/lp/data/normalized-mps-v2-20-10-80bau3b.opb
MD5SUM482f3c6a016323a565c292702d2c5673
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 183640
Biggest coefficient in the objective function 179765856174080000
Number of bits for the biggest coefficient in the objective function 58
Sum of the numbers in the objective function 6977628092477113102
Number of bits of the sum of numbers in the objective function 63
Biggest number in a constraint 179765856174080000
Number of bits of the biggest number in a constraint 58
Biggest sum of numbers in a constraint 6977628092477113102
Number of bits of the biggest sum of numbers63
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark2.14967
Number of variables228990
Total number of constraints5220
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 constraints5220
Minimum length of a constraint10
Maximum length of a constraint3330

Trace number 23077 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc29 THE 2005-04-22 04:31:39 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=10432 boxname=wulflinc29 idbench=803 idsolver=6 numberseed=0
MD5SUM SOLVER: 2225cba0d9b2c30e235f6cafc823d7ac  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  482f3c6a016323a565c292702d2c5673  /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-80bau3b.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-80bau3b.opb
IDLAUNCH: 10432
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.020
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	: 3
cpu MHz		: 451.020
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:        128544 kB
Buffers:         31040 kB
Cached:         851112 kB
SwapCached:        556 kB
Active:         107480 kB
Inactive:       776632 kB
HighTotal:      131008 kB
HighFree:          252 kB
LowTotal:       903652 kB
LowFree:        128292 kB
SwapTotal:     2097892 kB
SwapFree:      2096428 kB
Dirty:              40 kB
Writeback:           0 kB
Mapped:           5096 kB
Slab:            16272 kB
Committed_AS:    63604 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-04-22 04:31:43 (client local time) WITH STATUS 20 IN 2.14967 SECONDS
stats: 10432 7 2.14967 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-80bau3b.opb ......
s UNSATISFIABLE
c Done, CPU Time=0.910862
#### 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): 0.70 0.83 0.86 1/54 18094
Raw data (stat): 18094 (runsolver) D 18093 27222 27221 0 -1 64 4 0 0 0 0 0 0 0 18 0 1 0 550858285 1052672 99 4294967295 134512640 135381576 3221224528 3221219776 135158418 0 2147483391 7 90112 3225161850 0 0 17 1 0 0
Raw data (statm): 257 99 215 215 0 42 0
vsize: 1028
[startup+2.20825 s]
Raw data (loadavg): 0.70 0.83 0.86 1/53 18094
Raw data (stat): 18094 (runsolver) D 18093 27222 27221 0 -1 64 4 0 0 0 0 0 0 0 18 0 1 0 550858285 1052672 99 4294967295 134512640 135381576 3221224528 3221219776 135158418 0 2147483391 7 90112 3225161850 0 0 17 1 0 0
Raw data (statm): 257 99 215 215 0 42 0
vsize: 0

Child status: 20
Real time (s): 2.208
CPU time (s): 2.14967
CPU user time (s): 1.82772
CPU system time (s): 0.321951
CPU usage (%): 97.3583
Max. virtual memory (Kb): 1028
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####