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-sample2.opb
MD5SUMbdfddb0d042ec1aadcf4263f803cbd6f
Bench Categoryoptimization, big integers (OPTBIGINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 384000
Optimality of the best value was proved YES
Number of terms in the objective function 729
Biggest coefficient in the objective function 3221225472
Number of bits for the biggest coefficient in the objective function 32
Sum of the numbers in the objective function 70867574718
Number of bits of the sum of numbers in the objective function 37
Biggest number in a constraint 3221225472
Number of bits of the biggest number in a constraint 32
Biggest sum of numbers in a constraint 70867574718
Number of bits of the biggest sum of numbers37
Best result obtained on this benchmarkOPTIMUM FOUND
Best CPU time to get the best result obtained on this benchmark56.1635
Number of variables1296
Total number of constraints67
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)24
Number of constraints which are nor clauses,nor cardinality constraints43
Minimum length of a constraint1
Maximum length of a constraint150

Trace number 9996

Launcher Data

LAUNCH ON wulflinc32 THE 2005-09-23 16:26:15 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=8758 boxname=wulflinc32 idbench=554 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  bdfddb0d042ec1aadcf4263f803cbd6f  /oldhome/oroussel/tmp/wulflinc32/normalized-mps-v2-20-10-sample2.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc32/normalized-mps-v2-20-10-sample2.opb
IDLAUNCH: 8758
/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:        924460 kB
Buffers:         14820 kB
Cached:          75824 kB
SwapCached:          0 kB
Active:          42096 kB
Inactive:        51500 kB
HighTotal:      131072 kB
HighFree:        50752 kB
LowTotal:       903652 kB
LowFree:        873708 kB
SwapTotal:     2097892 kB
SwapFree:      2097892 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6988 kB
Slab:            11024 kB
Committed_AS:    63632 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-23 16:27:08 (client local time) WITH STATUS 0 IN 52.738 SECONDS
stats: 8758 7 52.738 0

Solver Data

c This solver internally uses Chaff 2004.11.15 Simplified
c running zchaff...
c got solution with objective value: 863095
c big objective detected
c trying from 0 to 511
c CONFLICT during preprocess 
c trying from 512 to 1023
*** glibc detected *** pb2sat: free(): invalid next size (fast): 0x113a27d8 ***
======= Backtrace: =========
[0x8133e0b]
[0x81342a2]
[0x806658b]
[0x8054311]
[0x8054360]
[0x8054360]
[0x8054360]
[0x8054360]
[0x8054360]
[0x8054360]
[0x8054360]
[0x8054360]
[0x8054360]
[0x8054360]
[0x8056e70]
[0x8057365]
[0x804a97e]
[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
081b4000-120e8000 rw-p 081b4000 00:00 0 
40000000-40001000 rw-p 40000000 00:00 0 
44984000-44c55000 rw-p 44984000 00:00 0 
46200000-46224000 rw-p 46200000 00:00 0 
46224000-46300000 ---p 46224000 00:00 0 
47186000-47587000 rw-p 47186000 00:00 0 
49387000-4b388000 rw-p 400fb000 00:00 0 
4c388000-5678a000 rw-p 4c388000 00:00 0 
bffc0000-c0000000 rw-p bffc0000 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/7745/stat): 7745 (pb2sat) R 7744 7745 4005 0 -1 0 18 0 0 0 0 0 0 0 23 0 1 0 21574826 1527808 2 4294967295 134512640 135987407 3221224560 3221224560 134512928 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/7745/statm): 373 2 364 364 0 9 0
[pid=7745] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc32/normalized-mps-v2-20-10-sample2.opb

[startup+10.0021 s]
Raw data (loadavg): 0.92 0.95 0.97 2/55 7745
Raw data (/proc/7745/stat): 7745 (pb2sat) R 7744 7745 4005 0 -1 0 29507 0 0 0 923 71 0 0 25 0 1 0 21574826 96133120 18324 4294967295 134512640 135987407 3221224560 3221057648 134887887 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/7745/statm): 23470 18325 364 364 0 23106 0
[pid=7745] vsize: 93880
Current children cumulated CPU time (s) 9.94
Current children cumulated vsize (Kb) 93880

[startup+20.0029 s]
Raw data (loadavg): 0.94 0.95 0.97 2/55 7745
Raw data (/proc/7745/stat): 7745 (pb2sat) R 7744 7745 4005 0 -1 0 60577 0 0 0 1856 134 0 0 25 0 1 0 21574826 188764160 37465 4294967295 134512640 135987407 3221224560 3221223248 134886395 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7745/statm): 46085 37465 364 364 0 45721 0
[pid=7745] vsize: 184340
Current children cumulated CPU time (s) 19.9
Current children cumulated vsize (Kb) 184340

[startup+30.0037 s]
Raw data (loadavg): 0.94 0.95 0.97 2/55 7745
Raw data (/proc/7745/stat): 7745 (pb2sat) R 7744 7745 4005 0 -1 0 87949 0 0 0 2797 190 0 0 25 0 1 0 21574826 272334848 54942 4294967295 134512640 135987407 3221224560 3221051728 134866040 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7745/statm): 66488 54942 364 364 0 66124 0
[pid=7745] vsize: 265952
Current children cumulated CPU time (s) 29.87
Current children cumulated vsize (Kb) 265952

[startup+40.0035 s]
Raw data (loadavg): 0.95 0.95 0.97 2/55 7745
Raw data (/proc/7745/stat): 7745 (pb2sat) R 7744 7745 4005 0 -1 0 110816 0 0 0 3744 242 0 0 25 0 1 0 21574826 349040640 65308 4294967295 134512640 135987407 3221224560 3221011252 134637920 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7745/statm): 85215 65308 364 364 0 84851 0
[pid=7745] vsize: 340860
Current children cumulated CPU time (s) 39.86
Current children cumulated vsize (Kb) 340860

[startup+50.0042 s]
Raw data (loadavg): 0.96 0.95 0.97 2/55 7745
Raw data (/proc/7745/stat): 7745 (pb2sat) R 7744 7745 4005 0 -1 0 128563 0 0 0 4704 279 0 0 25 0 1 0 21574826 375287808 82824 4294967295 134512640 135987407 3221224560 3221000720 134863107 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/7745/statm): 91623 82824 364 364 0 91259 0
[pid=7745] vsize: 366492
Current children cumulated CPU time (s) 49.83
Current children cumulated vsize (Kb) 366492
open syscall for file /dev/tty
open syscall for file /proc/self/maps
One traced child (pid=7745) 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): 52.9154
CPU time (s): 52.738
CPU user time (s): 49.6904
CPU system time (s): 3.04754
CPU usage (%): 99.6648
Max. virtual memory (cumulated for all children) (Kb): 366492

Verifier Data

ERROR: no interpretation found !