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

Nameweb/uclid_pb_benchmarks/normalized-elf.rf8.ucl.opb
MD5SUM292e72f7b2d52a721d8ea3b906202418
Bench Categoryno optimization function (SAT)
Has Objective FunctionNO
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 0
Biggest coefficient in the objective function 0
Number of bits for the biggest coefficient in the objective function 0
Sum of the numbers in the objective function 0
Number of bits of the sum of numbers in the objective function 0
Biggest number in a constraint 34
Number of bits of the biggest number in a constraint 6
Biggest sum of numbers in a constraint 127
Number of bits of the biggest sum of numbers7
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.887864
Number of variables6059
Total number of constraints16684
Number of constraints which are clauses15940
Number of constraints which are cardinality constraints (but not clauses)0
Number of constraints which are nor clauses,nor cardinality constraints744
Minimum length of a constraint1
Maximum length of a constraint11

Trace number 9758

Launcher Data

LAUNCH ON wulflinc30 THE 2005-09-23 15:18:59 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=8521 boxname=wulflinc30 idbench=317 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  292e72f7b2d52a721d8ea3b906202418  /oldhome/oroussel/tmp/wulflinc30/normalized-elf.rf8.ucl.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc30/normalized-elf.rf8.ucl.opb
IDLAUNCH: 8521
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.161
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	: 3
cpu MHz		: 451.161
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:      1034660 kB
MemFree:        944176 kB
Buffers:         11388 kB
Cached:          61848 kB
SwapCached:          0 kB
Active:          42996 kB
Inactive:        33144 kB
HighTotal:      131008 kB
HighFree:        65100 kB
LowTotal:       903652 kB
LowFree:        879076 kB
SwapTotal:     2097892 kB
SwapFree:      2097892 kB
Dirty:               4 kB
Writeback:           0 kB
Mapped:           6976 kB
Slab:             8720 kB
Committed_AS:    63660 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-23 15:19:02 (client local time) WITH STATUS 20 IN 2.58261 SECONDS
stats: 8521 7 2.58261 20

Solver Data

c This solver internally uses Chaff 2004.11.15 Simplified
c running zchaff...
s UNSATISFIABLE

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/7713/stat): 7713 (pb2sat) R 7712 7713 4004 0 -1 0 18 0 0 0 0 0 0 0 23 0 1 0 21173731 1527808 2 4294967295 134512640 135987407 3221224560 3221224560 134512928 0 0 5 0 0 0 0 17 0 0 0
Raw data (/proc/7713/statm): 373 2 364 364 0 9 0
[pid=7713] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc30/normalized-elf.rf8.ucl.opb
One traced child (pid=7713) exited with status: 20
All traced children have exited ! Game is over.

Child status: 20
Real time (s): 2.63187
CPU time (s): 2.58261
CPU user time (s): 2.50262
CPU system time (s): 0.079987
CPU usage (%): 98.1283
Max. virtual memory (cumulated for all children) (Kb): 0

Verifier Data

ERROR: no interpretation found !