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-stein27.opb
MD5SUM5cfd2609faa97ca60458112609ce37ee
Bench Categoryoptimization, small integers (OPTSMALLINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 18
Optimality of the best value was proved NO
Number of terms in the objective function 27
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 27
Number of bits of the sum of numbers in the objective function 5
Biggest number in a constraint 13
Number of bits of the biggest number in a constraint 4
Biggest sum of numbers in a constraint 40
Number of bits of the biggest sum of numbers6
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark1.02284
Number of variables27
Total number of constraints145
Number of constraints which are clauses117
Number of constraints which are cardinality constraints (but not clauses)28
Number of constraints which are nor clauses,nor cardinality constraints0
Minimum length of a constraint1
Maximum length of a constraint27

Trace number 20940 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc3 THE 2005-04-21 22:34:04 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=13903 boxname=wulflinc3 idbench=1070 idsolver=6 numberseed=0
MD5SUM SOLVER: 2225cba0d9b2c30e235f6cafc823d7ac  /oldhome/oroussel/solvers/PBS4
MD5SUM BENCH:  5cfd2609faa97ca60458112609ce37ee  /oldhome/oroussel/tmp/wulflinc3/normalized-mps-v2-20-10-stein27.opb
REAL COMMAND:  PBS4 /oldhome/oroussel/tmp/wulflinc3/normalized-mps-v2-20-10-stein27.opb
IDLAUNCH: 13903
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.190
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		: 451.190
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:        378456 kB
Buffers:         33736 kB
Cached:         600024 kB
SwapCached:          0 kB
Active:         103080 kB
Inactive:       533428 kB
HighTotal:      131008 kB
HighFree:          252 kB
LowTotal:       903652 kB
LowFree:        378204 kB
SwapTotal:     2097136 kB
SwapFree:      2096992 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6844 kB
Slab:            13948 kB
Committed_AS:    71788 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1388 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-04-21 22:34:22 (client local time) WITH STATUS 30 IN 18.2042 SECONDS
stats: 13903 0 18.2042 30
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c PBS v4 by Bashar Al-Rawi & Fadi Aloul
c Solving /oldhome/oroussel/tmp/wulflinc3/normalized-mps-v2-20-10-stein27.opb ......
c The optimum solution is:18
s OPTIMUM FOUND
v -V0001_bit0 -V0002_bit0 V0003_bit0 V0004_bit0 -V0005_bit0 V0006_bit0 V0007_bit0 V0008_bit0 -V0009_bit0 V0010_bit0 -V0011_bit0 -V0012_bit0 V0013_bit0 -V0014_bit0 -V0015_bit0 V0016_bit0 V0017_bit0 V0018_bit0 V0019_bit0 V0020_bit0 V0021_bit0 V0022_bit0 V0023_bit0 V0024_bit0 V0025_bit0 V0026_bit0 -V0027_bit0 
c Done, CPU Time=18.1942
#### 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): 0.75 0.88 0.89 2/54 21500
Raw data (stat): 21500 (runsolver) R 21499 10720 10719 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 490489426 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+10.0012 s]
Raw data (loadavg): 0.79 0.89 0.89 2/54 21500
Raw data (stat): 21500 (PBS4) R 21499 10720 10719 0 -1 0 1033 0 0 0 993 6 0 0 25 0 1 0 490489426 6672384 980 4294967295 134512640 135450300 3221224624 3221223500 135126769 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 1629 980 231 231 0 1398 0
vsize: 6516
[startup+18.212 s]
Raw data (loadavg): 0.82 0.89 0.89 1/53 21500
Raw data (stat): 21500 (PBS4) R 21499 10720 10719 0 -1 0 1033 0 0 0 993 6 0 0 25 0 1 0 490489426 6672384 980 4294967295 134512640 135450300 3221224624 3221223500 135126769 0 0 7 0 0 0 0 17 0 0 0
Raw data (statm): 1629 980 231 231 0 1398 0
vsize: 0

Child status: 30
Real time (s): 18.2114
CPU time (s): 18.2042
CPU user time (s): 18.1052
CPU system time (s): 0.098984
CPU usage (%): 99.9605
Max. virtual memory (Kb): 6516
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
Verifier:	OK	18
#### END VERIFIER DATA ####