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/ftp.netlib.org/lp/data/normalized-mps-v2-20-10-stair.opb
MD5SUMf2a6dc8d2697a7f5959c84e4079088c9
Bench Categoryoptimization, big integers (OPTBIGINT)
Has Objective FunctionYES
SatisfiableNO
(Un)Satisfiability was proved
Best value of the objective function
Optimality of the best value was proved
Number of terms in the objective function 30
Biggest coefficient in the objective function 536870912
Number of bits for the biggest coefficient in the objective function 30
Sum of the numbers in the objective function 1073741823
Number of bits of the sum of numbers in the objective function 30
Biggest number in a constraint 528959045369856
Number of bits of the biggest number in a constraint 49
Biggest sum of numbers in a constraint 3702118998041541
Number of bits of the biggest sum of numbers52
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark204.283
Number of variables11454
Total number of constraints362
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)0
Number of constraints which are nor clauses,nor cardinality constraints362
Minimum length of a constraint13
Maximum length of a constraint810

Trace number 9928

Launcher Data

LAUNCH ON wulflinc8 THE 2005-09-23 16:12:45 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=8683 boxname=wulflinc8 idbench=479 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  f2a6dc8d2697a7f5959c84e4079088c9  /oldhome/oroussel/tmp/wulflinc8/normalized-mps-v2-20-10-stair.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc8/normalized-mps-v2-20-10-stair.opb
IDLAUNCH: 8683
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.023
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		: 451.023
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:        933628 kB
Buffers:         12900 kB
Cached:          70740 kB
SwapCached:          0 kB
Active:          46704 kB
Inactive:        39824 kB
HighTotal:      131008 kB
HighFree:        56280 kB
LowTotal:       903652 kB
LowFree:        877348 kB
SwapTotal:     2097136 kB
SwapFree:      2097136 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6976 kB
Slab:             8904 kB
Committed_AS:    63624 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1364 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-23 16:14:40 (client local time) WITH STATUS 1 IN 114.483 SECONDS
stats: 8683 7 114.483 1

Solver Data

c This solver internally uses Chaff 2004.11.15 Simplified

	Unexpected exception :
	St9bad_alloc

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/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 18 0 0 0 0 0 0 0 23 0 1 0 21549103 1527808 2 4294967295 134512640 135987407 3221224560 3221224560 134512928 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 373 2 364 364 0 9 0
[pid=8753] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc8/normalized-mps-v2-20-10-stair.opb

[startup+10.0028 s]
Raw data (loadavg): 0.85 0.94 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 31070 0 0 0 937 59 0 0 25 0 1 0 21549103 98533376 19934 4294967295 134512640 135987407 3221224560 3221104544 134892999 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 24056 19934 364 364 0 23692 0
[pid=8753] vsize: 96224
Current children cumulated CPU time (s) 9.96
Current children cumulated vsize (Kb) 96224

[startup+20.0036 s]
Raw data (loadavg): 0.88 0.94 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 61293 0 0 0 1872 120 0 0 25 0 1 0 21549103 194113536 38951 4294967295 134512640 135987407 3221224560 3221108016 134556916 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 47391 38951 364 364 0 47027 0
[pid=8753] vsize: 189564
Current children cumulated CPU time (s) 19.92
Current children cumulated vsize (Kb) 189564

[startup+30.0044 s]
Raw data (loadavg): 0.89 0.94 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 103383 0 0 0 2790 200 0 0 25 0 1 0 21549103 325599232 58849 4294967295 134512640 135987407 3221224560 3221109028 134877883 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 79492 58849 364 364 0 79128 0
[pid=8753] vsize: 317968
Current children cumulated CPU time (s) 29.9
Current children cumulated vsize (Kb) 317968

[startup+40.0052 s]
Raw data (loadavg): 0.91 0.94 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 120907 0 0 0 3754 233 0 0 25 0 1 0 21549103 384032768 76166 4294967295 134512640 135987407 3221224560 3221109772 134637002 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 93758 76166 364 364 0 93394 0
[pid=8753] vsize: 375032
Current children cumulated CPU time (s) 39.87
Current children cumulated vsize (Kb) 375032

[startup+50.0059 s]
Raw data (loadavg): 0.92 0.94 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 139241 0 0 0 4719 267 0 0 25 0 1 0 21549103 409071616 94279 4294967295 134512640 135987407 3221224560 3221111116 134637002 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 99871 94279 364 364 0 99507 0
[pid=8753] vsize: 399484
Current children cumulated CPU time (s) 49.86
Current children cumulated vsize (Kb) 399484

[startup+60.0067 s]
Raw data (loadavg): 0.93 0.94 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 203973 0 0 0 5582 400 0 0 25 0 1 0 21549103 645439488 114867 4294967295 134512640 135987407 3221224560 3221113504 134537491 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 157578 114867 364 364 0 157214 0
[pid=8753] vsize: 630312
Current children cumulated CPU time (s) 59.82
Current children cumulated vsize (Kb) 630312

[startup+70.0075 s]
Raw data (loadavg): 0.94 0.95 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 219539 0 0 0 6552 429 0 0 25 0 1 0 21549103 701079552 130248 4294967295 134512640 135987407 3221224560 3221112960 134854943 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 171162 130248 364 364 0 170798 0
[pid=8753] vsize: 684648
Current children cumulated CPU time (s) 69.81
Current children cumulated vsize (Kb) 684648

[startup+80.0073 s]
Raw data (loadavg): 0.95 0.95 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 237784 0 0 0 7517 462 0 0 25 0 1 0 21549103 727175168 148278 4294967295 134512640 135987407 3221224560 3221112464 134802753 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 177533 148278 364 364 0 177169 0
[pid=8753] vsize: 710132
Current children cumulated CPU time (s) 79.79
Current children cumulated vsize (Kb) 710132

[startup+90.0081 s]
Raw data (loadavg): 0.96 0.95 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 255564 0 0 0 8484 494 0 0 25 0 1 0 21549103 751509504 165844 4294967295 134512640 135987407 3221224560 3221111316 134865975 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 183474 165844 364 364 0 183110 0
[pid=8753] vsize: 733896
Current children cumulated CPU time (s) 89.78
Current children cumulated vsize (Kb) 733896

[startup+100.009 s]
Raw data (loadavg): 0.97 0.95 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 269484 0 0 0 9456 520 0 0 25 0 1 0 21549103 820813824 179594 4294967295 134512640 135987407 3221224560 3221116212 134637792 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 200394 179594 364 364 0 200030 0
[pid=8753] vsize: 801576
Current children cumulated CPU time (s) 99.76
Current children cumulated vsize (Kb) 801576

[startup+110.01 s]
Raw data (loadavg): 0.97 0.95 0.95 2/55 8753
Raw data (/proc/8753/stat): 8753 (pb2sat) R 8752 8753 4060 0 -1 0 282185 0 0 0 10430 545 0 0 25 0 1 0 21549103 838897664 192141 4294967295 134512640 135987407 3221224560 3221223364 135477853 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8753/statm): 204809 192141 364 364 0 204445 0
[pid=8753] vsize: 819236
Current children cumulated CPU time (s) 109.75
Current children cumulated vsize (Kb) 819236
One traced child (pid=8753) exited with status: 1
All traced children have exited ! Game is over.

Child status: 1
Real time (s): 114.744
CPU time (s): 114.483
CPU user time (s): 108.632
CPU system time (s): 5.85011
CPU usage (%): 99.7724
Max. virtual memory (cumulated for all children) (Kb): 819236

Verifier Data

ERROR: no interpretation found !