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-air01.opb
MD5SUM90db1995bd949fc5ac74143a523f3bcf
Bench Categoryoptimization, medium integers (OPTMEDINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 3398
Optimality of the best value was proved YES
Number of terms in the objective function 771
Biggest coefficient in the objective function 3698
Number of bits for the biggest coefficient in the objective function 12
Sum of the numbers in the objective function 1192753
Number of bits of the sum of numbers in the objective function 21
Biggest number in a constraint 3698
Number of bits of the biggest number in a constraint 12
Biggest sum of numbers in a constraint 1192753
Number of bits of the biggest sum of numbers21
Best result obtained on this benchmarkOPTIMUM FOUND
Best CPU time to get the best result obtained on this benchmark112.215
Number of variables771
Total number of constraints794
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)794
Number of constraints which are nor clauses,nor cardinality constraints0
Minimum length of a constraint1
Maximum length of a constraint438

Trace number 9993

Launcher Data

LAUNCH ON wulflinc32 THE 2005-09-23 16:24:11 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=8753 boxname=wulflinc32 idbench=549 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  90db1995bd949fc5ac74143a523f3bcf  /oldhome/oroussel/tmp/wulflinc32/normalized-mps-v2-20-10-air01.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc32/normalized-mps-v2-20-10-air01.opb
IDLAUNCH: 8753
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.145
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		: 451.145
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:      1034724 kB
MemFree:        924260 kB
Buffers:         14788 kB
Cached:          75856 kB
SwapCached:          0 kB
Active:          42116 kB
Inactive:        51468 kB
HighTotal:      131072 kB
HighFree:        50720 kB
LowTotal:       903652 kB
LowFree:        873540 kB
SwapTotal:     2097892 kB
SwapFree:      2097892 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6988 kB
Slab:            11244 kB
Committed_AS:    63660 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-23 16:26:08 (client local time) WITH STATUS 0 IN 116.929 SECONDS
stats: 8753 7 116.929 0

Solver Data

c This solver internally uses Chaff 2004.11.15 Simplified
c running zchaff...
c got solution with objective value: 4827
c big objective detected
c trying from 0 to 511
c CONFLICT during preprocess 
c trying from 512 to 1023
c CONFLICT during preprocess 
c trying from 1024 to 1535

	Unexpected exception :
	St9bad_alloc
*** glibc detected *** pb2sat: free(): invalid next size (fast): 0x0bda18c8 ***
======= Backtrace: =========
[0x8133e0b]
[0x81342a2]
[0x810551d]
[0x808d2fd]
[0x8085a91]
[0x8118cb6]
[0x804ae2b]
[0x8110e79]
[0x8048141]
======= Memory map: ========
08048000-081b1000 r-xp 00000000 00:14 3276939    /oldhome/oroussel/solvers/pb2sat
081b1000-081b4000 rw-p 00168000 00:14 3276939    /oldhome/oroussel/solvers/pb2sat
081b4000-1da1e000 rw-p 081b4000 00:00 0 
40000000-40001000 rw-p 40000000 00:00 0 
45240000-45441000 rw-p 45240000 00:00 0 
47186000-47a98000 rw-p 47186000 00:00 0 
49387000-4c388000 rw-p 400fb000 00:00 0 
4c388000-4cb89000 rw-p 4c388000 00:00 0 
5678a000-6af8c000 rw-p 5678a000 00:00 0 
8d000000-8d021000 rw-p 8d000000 00:00 0 
8d021000-8d100000 ---p 8d021000 00:00 0 
bffbe000-c0000000 rw-p bffbe000 00:00 0 
ffffe000-fffff000 ---p 00000000 00:00 0

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/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 18 0 0 0 0 0 0 0 24 0 1 0 21562429 1527808 2 4294967295 134512640 135987407 3221224560 3221224560 134512928 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 373 2 364 364 0 9 0
[pid=7634] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc32/normalized-mps-v2-20-10-air01.opb

[startup+10.0022 s]
Raw data (loadavg): 0.92 0.95 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 29300 0 0 0 929 68 0 0 25 0 1 0 21562429 96612352 18161 4294967295 134512640 135987407 3221224560 3221128460 134637035 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 23587 18161 364 364 0 23223 0
[pid=7634] vsize: 94348
Current children cumulated CPU time (s) 9.97
Current children cumulated vsize (Kb) 94348

[startup+20.003 s]
Raw data (loadavg): 0.93 0.95 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 58384 0 0 0 1862 131 0 0 25 0 1 0 21562429 178872320 36050 4294967295 134512640 135987407 3221224560 3221222992 134829357 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 43670 36050 364 364 0 43306 0
[pid=7634] vsize: 174680
Current children cumulated CPU time (s) 19.93
Current children cumulated vsize (Kb) 174680

[startup+30.0038 s]
Raw data (loadavg): 0.94 0.95 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 89269 0 0 0 2789 200 0 0 25 0 1 0 21562429 280432640 56258 4294967295 134512640 135987407 3221224560 3220985960 134930959 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 68465 56258 364 364 0 68101 0
[pid=7634] vsize: 273860
Current children cumulated CPU time (s) 29.89
Current children cumulated vsize (Kb) 273860

[startup+40.0036 s]
Raw data (loadavg): 0.95 0.95 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 111366 0 0 0 3741 248 0 0 25 0 1 0 21562429 335495168 65833 4294967295 134512640 135987407 3221224560 3220995736 135486800 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 81908 65833 364 364 0 81544 0
[pid=7634] vsize: 327632
Current children cumulated CPU time (s) 39.89
Current children cumulated vsize (Kb) 327632

[startup+50.0044 s]
Raw data (loadavg): 0.96 0.95 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 127423 0 0 0 4705 283 0 0 25 0 1 0 21562429 376070144 81670 4294967295 134512640 135987407 3221224560 3221009516 134636959 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 91814 81670 364 364 0 91450 0
[pid=7634] vsize: 367256
Current children cumulated CPU time (s) 49.88
Current children cumulated vsize (Kb) 367256

[startup+60.0052 s]
Raw data (loadavg): 0.96 0.95 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 168180 0 0 0 5619 364 0 0 25 0 1 0 21562429 508743680 102820 4294967295 134512640 135987407 3221224560 3221079776 135479992 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 124205 102820 364 364 0 123841 0
[pid=7634] vsize: 496820
Current children cumulated CPU time (s) 59.83
Current children cumulated vsize (Kb) 496820

[startup+70.0059 s]
Raw data (loadavg): 0.97 0.96 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 189097 0 0 0 6569 411 0 0 25 0 1 0 21562429 568377344 119269 4294967295 134512640 135987407 3221224560 3221222956 135482121 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 138764 119269 364 364 0 138400 0
[pid=7634] vsize: 555056
Current children cumulated CPU time (s) 69.8
Current children cumulated vsize (Kb) 555056

[startup+80.0067 s]
Raw data (loadavg): 0.97 0.96 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 207218 0 0 0 7520 455 0 0 25 0 1 0 21562429 620957696 137249 4294967295 134512640 135987407 3221224560 3221109948 134635398 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 151601 137249 364 364 0 151237 0
[pid=7634] vsize: 606404
Current children cumulated CPU time (s) 79.75
Current children cumulated vsize (Kb) 606404

[startup+90.0065 s]
Raw data (loadavg): 0.98 0.96 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 239498 0 0 0 8448 527 0 0 25 0 1 0 21562429 721620992 144745 4294967295 134512640 135987407 3221224560 3221097212 134637002 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 176177 144745 364 364 0 175813 0
[pid=7634] vsize: 704708
Current children cumulated CPU time (s) 89.75
Current children cumulated vsize (Kb) 704708

[startup+100.007 s]
Raw data (loadavg): 0.98 0.96 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 250422 0 0 0 9426 548 0 0 25 0 1 0 21562429 730271744 155436 4294967295 134512640 135987407 3221224560 3221205752 134636945 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 178289 155436 364 364 0 177925 0
[pid=7634] vsize: 713156
Current children cumulated CPU time (s) 99.74
Current children cumulated vsize (Kb) 713156

[startup+110.008 s]
Raw data (loadavg): 0.98 0.96 0.97 2/55 7634
Raw data (/proc/7634/stat): 7634 (pb2sat) R 7633 7634 4005 0 -1 0 261331 0 0 0 10402 572 0 0 25 0 1 0 21562429 760971264 166150 4294967295 134512640 135987407 3221224560 3221182064 134877726 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7634/statm): 185784 166150 364 364 0 185420 0
[pid=7634] vsize: 743136
Current children cumulated CPU time (s) 109.74
Current children cumulated vsize (Kb) 743136
open syscall for file /dev/tty
open syscall for file /proc/self/maps
One traced child (pid=7634) ended because it received signal 6 (SIGABRT)
All traced children have exited ! Game is over.

Child ended because it received signal 6 (SIGABRT)
Real time (s): 117.21
CPU time (s): 116.929
CPU user time (s): 110.671
CPU system time (s): 6.25805
CPU usage (%): 99.7605
Max. virtual memory (cumulated for all children) (Kb): 743136

Verifier Data

ERROR: no interpretation found !