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).
  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

Namenormalized-opb/mps-v2-20-10/ftp.netlib.org/lp/data/normalized-mps-v2-20-10-pilot4.opb
MD5SUM51b37b22b0e13f30b25801aa060ca6d7
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 120
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 4294967292
Number of bits of the sum of numbers in the objective function 32
Biggest number in a constraint -3498116692108640256
Number of bits of the biggest number in a constraint 64
Biggest sum of numbers in a constraint 99417465468392882176
Number of bits of the biggest sum of numbers67
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.988849
Number of variables26494
Total number of constraints657
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 constraints657
Minimum length of a constraint10
Maximum length of a constraint1427

Trace number 31776 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc29 THE 2005-05-27 06:27:02 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=23206 boxname=wulflinc29 idbench=850 idsolver=16 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  51b37b22b0e13f30b25801aa060ca6d7  /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-pilot4.opb
REAL COMMAND:  minisat+_script -cb -gs /oldhome/oroussel/tmp/wulflinc29/normalized-mps-v2-20-10-pilot4.opb
IDLAUNCH: 23206
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.020
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		: 451.020
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:        864220 kB
Buffers:         33688 kB
Cached:         114228 kB
SwapCached:        460 kB
Active:          19100 kB
Inactive:       131152 kB
HighTotal:      131008 kB
HighFree:        49168 kB
LowTotal:       903652 kB
LowFree:        815052 kB
SwapTotal:     2097892 kB
SwapFree:      2096752 kB
Dirty:              52 kB
Writeback:           0 kB
Mapped:           5616 kB
Slab:            14440 kB
Committed_AS:    63600 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-05-27 06:27:16 (client local time) WITH STATUS 20 IN 13.6619 SECONDS
stats: 23206 7 13.6619 20
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c Parsing PB file...
c PARSE ERROR! [line 1252] Integer overflow. Use BigNum-version.
c OK -- Running BigNum-version instead...
c Parsing PB file...
c Converting 911 PB-constraints to clauses...
c   -- Unit propagations: ppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp  -- Detecting intervals from adjacent constraints: ###########################################################################################################################################################################################################################################################################
c   -- Clauses(.)/Splits(s): s
s UNSATISFIABLE
c _______________________________________________________________________________
c 
c restarts              : 0
c conflicts             : 0              (0 /sec)
c decisions             : 0              (0 /sec)
c propagations          : 0              (0 /sec)
c inspects              : 0              (0 /sec)
c CPU time              : 13.438 s
c _______________________________________________________________________________
#### END SOLVER DATA ####
#### BEGIN WATCHER DATA ####
Enforcing CPU limit (will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime (will send SIGXCPU) limit: 1230 seconds
Enforcing VSIZE limit: 943718400 bytes
Raw data (loadavg): 0.88 0.94 0.90 2/54 12202
Raw data (stat): 12202 (runsolver) R 12201 20001 20000 0 -1 64 4 0 0 0 0 0 0 0 19 0 1 0 853989560 1052672 99 4294967295 134512640 135381576 3221224464 3221219672 135158418 0 2147483391 7 90112 0 0 0 17 1 0 0
Raw data (statm): 257 99 215 215 0 42 0
vsize: 1028
[startup+9.99974 s]
Raw data (loadavg): 0.90 0.94 0.90 2/55 12207
Raw data (stat): 12202 (minisat+_script) S 12201 20001 20000 0 -1 0 300 589 0 0 0 0 4 1 18 0 1 0 853989560 2179072 234 4294967295 134512640 135087896 3221224528 3221223416 1074634510 0 65536 5 65538 3222414538 0 0 17 1 0 0
Raw data (statm): 532 234 485 147 0 385 0
vsize: 2128
[startup+13.6951 s]
Raw data (loadavg): 0.91 0.94 0.90 1/53 12207
Raw data (stat): 12202 (minisat+_script) S 12201 20001 20000 0 -1 0 300 589 0 0 0 0 4 1 18 0 1 0 853989560 2179072 234 4294967295 134512640 135087896 3221224528 3221223416 1074634510 0 65536 5 65538 3222414538 0 0 17 1 0 0
Raw data (statm): 532 234 485 147 0 385 0
vsize: 0

Child status: 20
Real time (s): 13.6946
CPU time (s): 13.6619
CPU user time (s): 13.4849
CPU system time (s): 0.176973
CPU usage (%): 99.7617
Max. virtual memory (Kb): 2128
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
ERROR: no interpretation found !
#### END VERIFIER DATA ####