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).
    Note that some very long lines in this section may be truncated by your web browser !
  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

Namemps-v2-20-10/MIPLIB/miplib/normalized-mps-v2-20-10-pipex.opb
MD5SUMb9c1029cc1d97a8d60e984f96f5d3267
Bench Categoryoptimization, medium integers (OPTMEDINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 788263
Optimality of the best value was proved YES
Number of terms in the objective function 48
Biggest coefficient in the objective function 107865
Number of bits for the biggest coefficient in the objective function 17
Sum of the numbers in the objective function 2514082
Number of bits of the sum of numbers in the objective function 22
Biggest number in a constraint 107865
Number of bits of the biggest number in a constraint 17
Biggest sum of numbers in a constraint 2514082
Number of bits of the biggest sum of numbers22
Best result obtained on this benchmarkOPTIMUM FOUND
Best CPU time to get the best result obtained on this benchmark45.4331
Number of variables48
Total number of constraints73
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)64
Number of constraints which are nor clauses,nor cardinality constraints9
Minimum length of a constraint1
Maximum length of a constraint16

Trace number 3751

Launcher Data

LAUNCH ON wulflinc28 THE 2005-09-19 03:03:18 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=1708 boxname=wulflinc28 idbench=536 idsolver=2 numberseed=0
MD5SUM SOLVER: 1540ae3c74fe6bb56fea7dc39e0baf99  /oldhome/oroussel/solvers/galena
MD5SUM BENCH:  b9c1029cc1d97a8d60e984f96f5d3267  /oldhome/oroussel/tmp/wulflinc28/normalized-mps-v2-20-10-pipex.opb
REAL COMMAND:  galena /oldhome/oroussel/tmp/wulflinc28/normalized-mps-v2-20-10-pipex.opb
IDLAUNCH: 1708
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.077
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		: 451.077
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:        894468 kB
Buffers:         35148 kB
Cached:          76832 kB
SwapCached:        696 kB
Active:          72296 kB
Inactive:        42216 kB
HighTotal:      131008 kB
HighFree:        50624 kB
LowTotal:       903652 kB
LowFree:        843844 kB
SwapTotal:     2097640 kB
SwapFree:      2096372 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5812 kB
Slab:            20076 kB
Committed_AS:    64164 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-19 03:03:19 (client local time) WITH STATUS 10 IN 1.10683 SECONDS
stats: 1708 0 1.10683 10

Solver Data

c Decisions:	6980
c Implications:	71329
c RUNTIME:	1.00085s
v -QUAN0101_bit0 -QUAN0102_bit0 -QUAN0103_bit0 -QUAN0104_bit0 -QUAN0105_bit0 QUAN0106_bit0 QUAN0107_bit0 -QUAN0108_bit0 -QUAN0109_bit0 QUAN0110_bit0 -QUAN0111_bit0 -QUAN0112_bit0 -QUAN0113_bit0 -QUAN0114_bit0 -QUAN0115_bit0 -QUAN0116_bit0 -QUAN0201_bit0 -QUAN0202_bit0 -QUAN0203_bit0 QUAN0204_bit0 -QUAN0205_bit0 -QUAN0206_bit0 -QUAN0207_bit0 QUAN0208_bit0 -QUAN0209_bit0 -QUAN0210_bit0 QUAN0211_bit0 QUAN0212_bit0 -QUAN0213_bit0 -QUAN0214_bit0 QUAN0215_bit0 QUAN0216_bit0 QUAN0301_bit0 QUAN0302_bit0 QUAN0303_bit0 -QUAN0304_bit0 QUAN0305_bit0 -QUAN0306_bit0 -QUAN0307_bit0 -QUAN0308_bit0 QUAN0309_bit0 -QUAN0310_bit0 -QUAN0311_bit0 -QUAN0312_bit0 QUAN0313_bit0 QUAN0314_bit0 -QUAN0315_bit0 -QUAN0316_bit0 
s SATISFIABLE

Watcher Data

Enforcing CPU limit (will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime (will send SIGXCPU) limit: 1230 seconds
Enforcing Stack size limit: 67108864 bytes
Enforcing memory limit (will send SIGTERM then SIGKILL): 921600 Kb
Enforcing VSIZE limit: 994918400 bytes
Current StackSize limit: 67108864 bytes
Raw data (/proc/8091/stat): 8091 (galena) R 8090 8091 20115 0 -1 0 18 0 0 0 0 0 0 0 23 0 1 0 1846516557 1015808 2 4294967295 134512640 135412752 3221224560 3221224560 134512896 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/8091/statm): 248 2 241 241 0 7 0
[pid=8091] vsize: 992
open syscall for file /oldhome/oroussel/tmp/wulflinc28/normalized-mps-v2-20-10-pipex.opb
One traced child (pid=8091) exited with status: 10
All traced children have exited ! Game is over.

Child status: 10
Real time (s): 1.31817
CPU time (s): 1.10683
CPU user time (s): 1.00485
CPU system time (s): 0.101984
CPU usage (%): 83.9673
Max. virtual memory (cumulated for all children) (Kb): 0

Verifier Data

Verifier:	OK	802184