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/MIPLIB/miplib/normalized-mps-v2-20-10-bm23.opb
MD5SUM9e4c4999c6f95fcef879d3d86840d71a
Bench Categoryoptimization, small integers (OPTSMALLINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 34
Optimality of the best value was proved NO
Number of terms in the objective function 27
Biggest coefficient in the objective function 9
Number of bits for the biggest coefficient in the objective function 4
Sum of the numbers in the objective function 124
Number of bits of the sum of numbers in the objective function 7
Biggest number in a constraint 65
Number of bits of the biggest number in a constraint 7
Biggest sum of numbers in a constraint 182
Number of bits of the biggest sum of numbers8
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.25796
Number of variables27
Total number of constraints47
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)27
Number of constraints which are nor clauses,nor cardinality constraints20
Minimum length of a constraint1
Maximum length of a constraint26

Trace number 42383 

#### BEGIN LAUNCHER DATA ####
LAUNCH ON wulflinc4 THE 2005-06-16 06:18:44 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=25604 boxname=wulflinc4 idbench=904 idsolver=18 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  9e4c4999c6f95fcef879d3d86840d71a  /oldhome/oroussel/tmp/wulflinc4/normalized-mps-v2-20-10-bm23.opb
REAL COMMAND:  pb2sat-v2 /oldhome/oroussel/tmp/wulflinc4/normalized-mps-v2-20-10-bm23.opb
IDLAUNCH: 25604
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.169
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	: 890.88

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 2
cpu MHz		: 451.169
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:        704692 kB
Buffers:         34372 kB
Cached:         274016 kB
SwapCached:        944 kB
Active:          27248 kB
Inactive:       283196 kB
HighTotal:      131008 kB
HighFree:         1344 kB
LowTotal:       903652 kB
LowFree:        703348 kB
SwapTotal:     2097136 kB
SwapFree:      2095208 kB
Dirty:              24 kB
Writeback:           0 kB
Mapped:           4996 kB
Slab:            13984 kB
Committed_AS:    71908 kB
PageTables:        316 kB
VmallocTotal:   114680 kB
VmallocUsed:      1388 kB
VmallocChunk:   113256 kB
JOB ENDED THE 2005-06-16 06:19:30 (client local time) WITH STATUS 30 IN 46.153 SECONDS
stats: 25604 0 46.153 30
#### END LAUNCHER DATA ####
#### BEGIN SOLVER DATA ####
c This solver internally uses Chaff 2004.11.15 Simplified
c running zchaff...
c got solution with objective value: 64
c small objective detected
c CONFLICT during preprocess 
c [startup+0.42673 s]  setting bit 6 to 0
c [startup+8.71889 s]  setting bit 5 to 0
c got solution with objective value: 45
c [startup+10.2344 s]  setting bit 4 to 1

c Decision: 488/8092	Time: 10.9503/86400
c got solution with objective value: 38
c [startup+24.6029 s]  setting bit 3 to 1

c Decision: 515/8092	Time: 6.81297/86400
c got solution with objective value: 35
c [startup+36.3505 s]  setting bit 2 to 1

c [startup+42.9099 s]  setting bit 1 to 0

c got solution with objective value: 34
c [startup+46.1384 s]  setting bit 0 to 1
s OPTIMUM FOUND
v -C101_bit0 -C102_bit0 C103_bit0 -C104_bit0 C105_bit0 -C106_bit0 -C107_bit0 -C108_bit0 C109_bit0 -C110_bit0 -C111_bit0 -C112_bit0 -C113_bit0 -C114_bit0 C115_bit0 -C116_bit0 C117_bit0 -C118_bit0 -C119_bit0 C120_bit0 -C121_bit0 C122_bit0 -C123_bit0 -C124_bit0 -C125_bit0 -C126_bit0 C127_bit0 
#### 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
Enforcing Stack size limit: 67108864 bytes
Current StackSize limit: 67108864 bytes
Raw data (loadavg): 0.91 0.95 0.90 1/54 22894
Raw data (stat): 22894 (runsolver) R 22893 21152 21151 0 -1 64 8 0 0 0 0 0 0 0 19 0 1 0 968535967 884736 94 4294967295 134512640 135332820 3221224464 3221219644 135092226 0 2147483391 7 90112 0 0 0 17 1 0 0
Raw data (statm): 216 94 205 205 0 11 0
vsize: 864
[startup+10.0015 s]
Raw data (loadavg): 0.92 0.95 0.90 2/54 22894
Raw data (stat): 22894 (pb2sat-v2) R 22893 21152 21151 0 -1 0 1213 0 0 0 996 2 0 0 25 0 1 0 968535967 5111808 918 4294967295 134512640 135730672 3221224576 3221222864 134747651 0 0 7 16384 0 0 0 17 1 0 0
Raw data (statm): 1248 918 301 301 0 947 0
vsize: 4992
[startup+20.0022 s]
Raw data (loadavg): 0.94 0.95 0.91 2/54 22894
Raw data (stat): 22894 (pb2sat-v2) R 22893 21152 21151 0 -1 0 1468 0 0 0 1994 4 0 0 25 0 1 0 968535967 5898240 980 4294967295 134512640 135730672 3221224576 3221222864 134747536 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 1440 980 301 301 0 1139 0
vsize: 5760
[startup+30.0024 s]
Raw data (loadavg): 0.95 0.95 0.91 2/54 22894
Raw data (stat): 22894 (pb2sat-v2) R 22893 21152 21151 0 -1 0 1513 0 0 0 2994 4 0 0 25 0 1 0 968535967 5996544 1025 4294967295 134512640 135730672 3221224576 3221222864 134747541 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 1464 1025 301 301 0 1163 0
vsize: 5856
[startup+40.003 s]
Raw data (loadavg): 0.95 0.95 0.91 2/54 22894
Raw data (stat): 22894 (pb2sat-v2) R 22893 21152 21151 0 -1 0 1602 0 0 0 3993 5 0 0 25 0 1 0 968535967 6078464 1114 4294967295 134512640 135730672 3221224576 3221222704 134739213 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 1484 1114 301 301 0 1183 0
vsize: 5936
[startup+46.1667 s]
Raw data (loadavg): 0.96 0.95 0.91 1/53 22894
Raw data (stat): 22894 (pb2sat-v2) R 22893 21152 21151 0 -1 0 1602 0 0 0 3993 5 0 0 25 0 1 0 968535967 6078464 1114 4294967295 134512640 135730672 3221224576 3221222704 134739213 0 0 7 16384 0 0 0 17 0 0 0
Raw data (statm): 1484 1114 301 301 0 1183 0
vsize: 0

Child status: 30
Real time (s): 46.1664
CPU time (s): 46.153
CPU user time (s): 46.092
CPU system time (s): 0.06099
CPU usage (%): 99.9708
Max. virtual memory (Kb): 5936
#### END WATCHER DATA ####
#### BEGIN VERIFIER DATA ####
Verifier:	OK	34
#### END VERIFIER DATA ####