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/plato.asu.edu/pub/milp/normalized-mps-v2-20-10-neos16.opb
MD5SUM44281820d2b00a47b643433ffa4e2d73
Bench Categoryoptimization, small integers (OPTSMALLINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 117
Optimality of the best value was proved NO
Number of terms in the objective function 8
Biggest coefficient in the objective function 128
Number of bits for the biggest coefficient in the objective function 8
Sum of the numbers in the objective function 255
Number of bits of the sum of numbers in the objective function 8
Biggest number in a constraint 138
Number of bits of the biggest number in a constraint 8
Biggest sum of numbers in a constraint 535
Number of bits of the biggest sum of numbers10
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark5.96709
Number of variables464
Total number of constraints1395
Number of constraints which are clauses336
Number of constraints which are cardinality constraints (but not clauses)336
Number of constraints which are nor clauses,nor cardinality constraints723
Minimum length of a constraint1
Maximum length of a constraint128

Trace number 20528 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc13 THE 2005-04-21 21:34:21 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=14590 boxname=wulflinc13 idbench=1123 idsolver=4 numberseed=0
MD5SUM SOLVER: 1540ae3c74fe6bb56fea7dc39e0baf99  /oldhome/oroussel/solvers/galena
MD5SUM BENCH:  44281820d2b00a47b643433ffa4e2d73  /oldhome/oroussel/tmp/wulflinc13/normalized-mps-v2-20-10-neos16.opb
REAL COMMAND:  galena /oldhome/oroussel/tmp/wulflinc13/normalized-mps-v2-20-10-neos16.opb
IDLAUNCH: 14590
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.242
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		: 451.242
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	: 901.12

/proc/meminfo:
MemTotal:      1034660 kB
MemFree:        785356 kB
Buffers:         11732 kB
Cached:         216688 kB
SwapCached:        264 kB
Active:          94524 kB
Inactive:       135844 kB
HighTotal:      131008 kB
HighFree:        34104 kB
LowTotal:       903652 kB
LowFree:        751252 kB
SwapTotal:     2097136 kB
SwapFree:      2095968 kB
Dirty:              40 kB
Writeback:           0 kB
Mapped:           5744 kB
Slab:            13276 kB
Committed_AS:    63560 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1364 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-04-21 21:34:22 (client local time) WITH STATUS 0 IN 1.02984 SECONDS
stats: 14590 7 1.02984 0
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c Decisions:	5630
c Implications:	108962
c RUNTIME:	1.00085s
s UNKNOWN
#### 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 0.91 0.90 2/54 28231
Raw data (stat): 28231 (runsolver) R 28230 30701 30700 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 490139802 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+1.03519 s]
Raw data (loadavg): 0.85 0.91 0.90 1/53 28231
Raw data (stat): 28231 (runsolver) R 28230 30701 30700 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 490139802 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: 0
Real time (s): 1.03487
CPU time (s): 1.02984
CPU user time (s): 1.00585
CPU system time (s): 0.023996
CPU usage (%): 99.5143
Max. virtual memory (Kb): 1028
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####