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-stein27.opb
MD5SUM5af5f5067167ce7c0b9b9169af5e7adf
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 YES
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 benchmarkOPTIMUM FOUND
Best CPU time to get the best result obtained on this benchmark1.41079
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 553

Launcher Data

LAUNCH ON wulflinc26 THE 2005-09-18 11:24:51 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=545 boxname=wulflinc26 idbench=545 idsolver=1 numberseed=0
MD5SUM SOLVER: 38f99674050b34630888bf623b924b59  /oldhome/oroussel/solvers/bsolo
MD5SUM BENCH:  5af5f5067167ce7c0b9b9169af5e7adf  /oldhome/oroussel/tmp/wulflinc26/normalized-mps-v2-20-10-stein27.opb
REAL COMMAND:  bsolo /oldhome/oroussel/tmp/wulflinc26/normalized-mps-v2-20-10-stein27.opb
IDLAUNCH: 545
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.061
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		: 451.061
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:        944952 kB
Buffers:         34704 kB
Cached:          28008 kB
SwapCached:        868 kB
Active:          53408 kB
Inactive:        11912 kB
HighTotal:      131008 kB
HighFree:       100296 kB
LowTotal:       903652 kB
LowFree:        844656 kB
SwapTotal:     2097892 kB
SwapFree:      2096540 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5696 kB
Slab:            18732 kB
Committed_AS:    64132 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-18 11:25:40 (client local time) WITH STATUS 30 IN 40.5378 SECONDS
stats: 545 0 40.5378 30

Solver Data

c INFO: OSL Context initialized.
c Initial problem consists of 27 variables and 118 constraints.
c No problem reductions applied in OPT. instance.
c	preprocess terminated. Elapsed time: 0.074
c After prepocess the problem consists of 27 variables and 118 constraints.
c Initial Lower Bound: 0
c NEW SOLUTION FOUND: 20 @ 0.075 @ #Dec. 20
c NEW SOLUTION FOUND: 19 @ 0.08 @ #Dec. 51
c NEW SOLUTION FOUND: 18 @ 0.085 @ #Dec. 91
c Restart #1 #Var: 27 #Dec: 317 LB: 0 @ 0.151
c Restart #2 #Var: 27 #Dec: 737 LB: 0 @ 0.344
c Restart #3 #Var: 27 #Dec: 1378 LB: 0 @ 0.689
c Restart #4 #Var: 27 #Dec: 2217 LB: 0 @ 1.333
c CHANGE to LPR mode... 	UB: 18	MIS: 0	LPR: 13 (0.024)	Diff: 0
c Restart #0 #Var: 27 #Dec: 3274 LB: 0 @ 2.536
c Restart #1 #Var: 27 #Dec: 3479 LB: 13 @ 5.592
c Restart #2 #Var: 27 #Dec: 3883 LB: 13 @ 10.372
c Restart #3 #Var: 26 #Dec: 4488 LB: 13 @ 19.676
c Restart #4 #Var: 24 #Dec: 5293 LB: 13 @ 32.551
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 Cost: 18
c Exit Code: 30
c Total time: 40.523 s

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/18788/stat): 18788 (bsolo) R 18787 18788 16528 0 -1 0 19 0 0 0 0 0 0 0 23 0 1 0 1840885383 438272 3 4294967295 134512640 134736556 3221224560 3221224560 1073744960 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/18788/statm): 107 3 90 68 0 39 0
[pid=18788] vsize: 428
open syscall for file /etc/ld.so.preload
open syscall for file tls/i686/mmx/libosl.so
open syscall for file tls/i686/libosl.so
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open syscall for file i686/libosl.so
open syscall for file mmx/libosl.so
open syscall for file libosl.so
open syscall for file /oldhome/oroussel/lib/tls/i686/mmx/libosl.so
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open syscall for file /oldhome/oroussel/lib/libosl.so
open syscall for file tls/i686/mmx/libstdc++-libc6.2-2.so.3
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open syscall for file i686/mmx/libstdc++-libc6.2-2.so.3
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open syscall for file mmx/libstdc++-libc6.2-2.so.3
open syscall for file libstdc++-libc6.2-2.so.3
open syscall for file /oldhome/oroussel/lib/libstdc++-libc6.2-2.so.3
open syscall for file /etc/ld.so.cache
open syscall for file /usr/lib/libstdc++-libc6.2-2.so.3
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open syscall for file libm.so.6
open syscall for file /oldhome/oroussel/lib/libm.so.6
open syscall for file /lib/tls/libm.so.6
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open syscall for file /oldhome/oroussel/lib/libpthread.so.0
open syscall for file /lib/tls/libpthread.so.0
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open syscall for file /lib/tls/libc.so.6
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open syscall for file i686/libgcc_s.so.1
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open syscall for file libgcc_s.so.1
open syscall for file /oldhome/oroussel/lib/libgcc_s.so.1
open syscall for file /lib/libgcc_s.so.1
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open syscall for file /oldhome/oroussel/.OptimizationSolutions/nodelock
open syscall for file /oldhome/oroussel/tmp/wulflinc26/normalized-mps-v2-20-10-stein27.opb

[startup+10.0034 s]
Raw data (loadavg): 0.87 0.97 0.99 2/56 18788
Raw data (/proc/18788/stat): 18788 (bsolo) R 18787 18788 16528 0 -1 0 4133 0 0 0 770 76 0 0 19 0 1 0 1840885383 12296192 2296 4294967295 134512640 134736556 3221224560 3221223036 134536369 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/18788/statm): 3002 2296 1116 68 0 2934 0
[pid=18788] vsize: 12008
Current children cumulated CPU time (s) 8.46
Current children cumulated vsize (Kb) 12008

[startup+20.0031 s]
Raw data (loadavg): 0.89 0.97 0.99 2/56 18788
Raw data (/proc/18788/stat): 18788 (bsolo) R 18787 18788 16528 0 -1 0 6584 0 0 0 1518 152 0 0 20 0 1 0 1840885383 13410304 2520 4294967295 134512640 134736556 3221224560 3221223248 134529503 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/18788/statm): 3274 2520 1116 68 0 3206 0
[pid=18788] vsize: 13096
Current children cumulated CPU time (s) 16.7
Current children cumulated vsize (Kb) 13096

[startup+30.0038 s]
Raw data (loadavg): 0.98 0.99 0.99 2/56 18788
Raw data (/proc/18788/stat): 18788 (bsolo) R 18787 18788 16528 0 -1 0 8887 0 0 0 2278 224 0 0 20 0 1 0 1840885383 14045184 2723 4294967295 134512640 134736556 3221224560 3221223084 134536381 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/18788/statm): 3429 2723 1116 68 0 3361 0
[pid=18788] vsize: 13716
Current children cumulated CPU time (s) 25.02
Current children cumulated vsize (Kb) 13716

[startup+40.0035 s]
Raw data (loadavg): 0.98 0.99 0.99 1/56 18788
Raw data (/proc/18788/stat): 18788 (bsolo) T 18787 18788 16528 0 -1 0 11012 0 0 0 3054 290 0 0 22 0 1 0 1840885383 14880768 2901 4294967295 134512640 134736556 3221224560 3221222692 1077782939 0 0 5 16384 3222434794 0 0 17 1 0 0
Raw data (/proc/18788/statm): 3633 2901 1116 68 0 3565 0
[pid=18788] vsize: 14532
Current children cumulated CPU time (s) 33.44
Current children cumulated vsize (Kb) 14532
One traced child (pid=18788) exited with status: 30
All traced children have exited ! Game is over.

Child status: 30
Real time (s): 48.3013
CPU time (s): 40.5378
CPU user time (s): 37.1364
CPU system time (s): 3.40148
CPU usage (%): 83.9271
Max. virtual memory (cumulated for all children) (Kb): 14532

Verifier Data

Verifier:	OK	18