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-bnl2.opb
MD5SUM98512bff24b30a4b39304804d2f8a5cb
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 50550
Biggest coefficient in the objective function 322444669747200
Number of bits for the biggest coefficient in the objective function 49
Sum of the numbers in the objective function 11314136774293353
Number of bits of the sum of numbers in the objective function 54
Biggest number in a constraint 322444669747200
Number of bits of the biggest number in a constraint 49
Biggest sum of numbers in a constraint 11314136774293353
Number of bits of the biggest sum of numbers54
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark56.7314
Number of variables104670
Total number of constraints2280
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 constraints2280
Minimum length of a constraint30
Maximum length of a constraint2460

Trace number 422

Launcher Data

LAUNCH ON wulflinc2 THE 2005-09-18 10:30:57 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=413 boxname=wulflinc2 idbench=413 idsolver=1 numberseed=0
MD5SUM SOLVER: 38f99674050b34630888bf623b924b59  /oldhome/oroussel/solvers/bsolo
MD5SUM BENCH:  98512bff24b30a4b39304804d2f8a5cb  /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-20-10-bnl2.opb
REAL COMMAND:  bsolo /oldhome/oroussel/tmp/wulflinc2/normalized-mps-v2-20-10-bnl2.opb
IDLAUNCH: 413
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.191
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		: 451.191
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:        942024 kB
Buffers:         33700 kB
Cached:          34824 kB
SwapCached:       1040 kB
Active:          62988 kB
Inactive:         8184 kB
HighTotal:      131008 kB
HighFree:        94948 kB
LowTotal:       903652 kB
LowFree:        847076 kB
SwapTotal:     2097136 kB
SwapFree:      2095568 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           5696 kB
Slab:            15648 kB
Committed_AS:    72360 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1388 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-09-18 10:31:54 (client local time) WITH STATUS 20 IN 56.7314 SECONDS
stats: 413 7 56.7314 20

Solver Data

c INFO: OSL Context initialized.
c BIG Int formula...
c Initial problem consists of 104670 variables and 3587 constraints.
s UNSATISFIABLE
c Exit Code: 20
c Total time: 56.591 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/8068/stat): 8068 (bsolo) R 8067 8068 6872 0 -1 0 19 0 0 0 0 0 0 0 23 0 1 0 1782335734 438272 3 4294967295 134512640 134736556 3221224560 3221224560 1073744960 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/8068/statm): 107 3 90 68 0 39 0
[pid=8068] 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
open syscall for file tls/mmx/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 i686/mmx/libstdc++-libc6.2-2.so.3
open syscall for file i686/libstdc++-libc6.2-2.so.3
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
open syscall for file tls/i686/mmx/libm.so.6
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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
open syscall for file tls/i686/mmx/libpthread.so.0
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open syscall for file libpthread.so.0
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 libc.so.6
open syscall for file /oldhome/oroussel/lib/libc.so.6
open syscall for file /lib/tls/libc.so.6
open syscall for file tls/i686/mmx/libgcc_s.so.1
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open syscall for file tls/libgcc_s.so.1
open syscall for file i686/mmx/libgcc_s.so.1
open syscall for file i686/libgcc_s.so.1
open syscall for file mmx/libgcc_s.so.1
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/tmp/wulflinc2/normalized-mps-v2-20-10-bnl2.opb

[startup+10.003 s]
Raw data (loadavg): 0.94 0.98 0.92 2/56 8068
Raw data (/proc/8068/stat): 8068 (bsolo) R 8067 8068 6872 0 -1 0 37901 0 0 0 881 97 0 0 25 0 1 0 1782335734 156786688 37199 4294967295 134512640 134736556 3221224560 3221223068 1077399560 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8068/statm): 38278 37199 1116 68 0 38210 0
[pid=8068] vsize: 153112
Current children cumulated CPU time (s) 9.78
Current children cumulated vsize (Kb) 153112

[startup+20.0047 s]
Raw data (loadavg): 0.95 0.98 0.92 2/56 8068
Raw data (/proc/8068/stat): 8068 (bsolo) R 8067 8068 6872 0 -1 0 45255 0 0 0 1861 112 0 0 25 0 1 0 1782335734 186753024 44553 4294967295 134512640 134736556 3221224560 3221223068 1077399562 0 0 5 16384 0 0 0 17 0 0 0
Raw data (/proc/8068/statm): 45594 44553 1116 68 0 45526 0
[pid=8068] vsize: 182376
Current children cumulated CPU time (s) 19.73
Current children cumulated vsize (Kb) 182376

[startup+30.0054 s]
Raw data (loadavg): 0.95 0.98 0.92 2/56 8068
Raw data (/proc/8068/stat): 8068 (bsolo) R 8067 8068 6872 0 -1 0 52630 0 0 0 2839 130 0 0 25 0 1 0 1782335734 216784896 51928 4294967295 134512640 134736556 3221224560 3221223136 134539937 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/8068/statm): 52926 51929 1116 68 0 52858 0
[pid=8068] vsize: 211704
Current children cumulated CPU time (s) 29.69
Current children cumulated vsize (Kb) 211704

[startup+40.0051 s]
Raw data (loadavg): 0.96 0.98 0.92 2/56 8068
Raw data (/proc/8068/stat): 8068 (bsolo) R 8067 8068 6872 0 -1 0 58949 0 0 0 3820 145 0 0 25 0 1 0 1782335734 240074752 57653 4294967295 134512640 134736556 3221224560 3221222904 1077378037 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/8068/statm): 58612 57653 1116 68 0 58544 0
[pid=8068] vsize: 234448
Current children cumulated CPU time (s) 39.65
Current children cumulated vsize (Kb) 234448

[startup+50.0058 s]
Raw data (loadavg): 0.97 0.98 0.92 2/56 8068
Raw data (/proc/8068/stat): 8068 (bsolo) R 8067 8068 6872 0 -1 0 61323 0 0 0 4810 151 0 0 25 0 1 0 1782335734 249978880 60027 4294967295 134512640 134736556 3221224560 3221223336 1076611932 0 0 5 16384 0 0 0 17 1 0 0
Raw data (/proc/8068/statm): 61030 60027 1116 68 0 60962 0
[pid=8068] vsize: 244120
Current children cumulated CPU time (s) 49.61
Current children cumulated vsize (Kb) 244120
One traced child (pid=8068) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 57.1527
CPU time (s): 56.7314
CPU user time (s): 54.7747
CPU system time (s): 1.9567
CPU usage (%): 99.2628
Max. virtual memory (cumulated for all children) (Kb): 244120

Verifier Data

ERROR: no interpretation found !