Trace number 41257

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 into four (or five) parts:
  1. 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 ! In such a case, you may want to use the "Download as text" link to get the trace as a text file.

    When the --timestamp option is passed to the runsolver program, each line output by the solver is prepended with a timestamp which indicates at what time the line was output by the solver. Times are relative to the start of the program, given in seconds, and are wall clock time (not CPU time).

    As some 'v lines' may be very long (sometimes several megabytes), the 'v line' output by your solver may be split on several lines to help limit the size of the trace recorded in the database. In any case, the exact output of your solver is preserved in a trace file.
  2. 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.
  3. CONVERSION SCRIPT DATA (Optionnal)
    When a conversion script is used, this section shows the messages that were output by the conversion script.
  4. 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 X seconds (see the parameters in the trace). 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 X+30 seconds which will send a SIGXPU to the solver. The last limit is on the virtual memory used by the process (see the parameters in the trace).
    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.
  5. 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 provides some useful information on the computer.

Solver answer on this benchmark

Solver NameAnswerObjective functionCPU timeWall clock time
PBS 4.1LUNSAT 10.9743 10.9796

General information on the benchmark

Namenormalized-PB06/OPT-SMALLINT/reduced/mps-v2-20-10/plato.asu.edu/
pub/milp/normalized-reduced-mps-v2-20-10-neos12.opb
MD5SUMa0b6152dd8614459e798b375ad9ceb75
Bench CategoryOPT-SMALLINT (optimisation, small integers)
Best result obtained on this benchmarkUNSAT
Best value of the objective obtained on this benchmark
Best CPU time to get the best result obtained on this benchmark6.31404
Has Objective FunctionYES
SatisfiableNO
(Un)Satisfiability was provedYES
Best value of the objective function
Optimality of the best value was proved
Number of variables22960
Total number of constraints8611
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 constraints8611
Minimum length of a constraint11
Maximum length of a constraint840
Number of terms in the objective function 13440
Biggest coefficient in the objective function 586
Number of bits for the biggest coefficient in the objective function 10
Sum of the numbers in the objective function 535808
Number of bits of the sum of numbers in the objective function 20
Biggest number in a constraint 262144
Number of bits of the biggest number in a constraint 19
Biggest sum of numbers in a constraint 535808
Number of bits of the biggest sum of numbers20
Number of products (including duplicates)0
Sum of products size (including duplicates)0
Number of different products0
Sum of products size0

Solver Data (download as text)

0.00	c PBS v4 by Bashar Al-Rawi & Fadi Aloul
0.00	c Solving ROOT/tmp/node50/41257-1149255246/instance-41257-1149255246.opb ......
10.97	c done parsing opb.
10.97	s UNSATISFIABLE
10.97	c Total Run Time					8.82866

Verifier Data (download as text)

ERROR: no interpretation found !

Watcher Data (download as text)

Enforcing CPU limit (will send SIGTERM then SIGKILL): 1800 seconds
Enforcing CPUTime (will send SIGXCPU) limit: 1830 seconds
Enforcing Stack size limit: 67108864 bytes
Enforcing memory limit (will send SIGKILL): 1843200 Kb
Enforcing VSIZE limit: 1887436800 bytes
runsolver version 3.0.0 (c) roussel@cril.univ-artois.fr

command line: runsolver --timestamp -w ROOT/results/node50/watcher-41257-1149255246 -o ROOT/results/node50/solver-41257-1149255246 -C 1800 -M 1800 -S 64 ROOT/solvers/PB/PB06final/user11/PBS4L ROOT/tmp/node50/41257-1149255246/instance-41257-1149255246.opb 572722681 

Current StackSize limit: 67108864 bytes

/proc/loadavg: 0.92 0.97 0.96 2/64 369
/proc/meminfo: memFree=1292824/2055920 swapFree=4181340/4192956
[pid=369] ppid=367 vsize=3556 CPUtime=0
/proc/369/stat : 369 (PBS4L) R 367 369 323 0 -1 4194304 217 0 0 0 0 0 0 0 18 0 1 0 191191747 3641344 201 18446744073709551615 134512640 135466232 4294956672 18446744073709551615 134598843 0 0 4096 0 0 0 0 17 1 0 0
/proc/369/statm: 889 202 90 232 0 654 0

[startup+10.0022 s]
/proc/loadavg: 0.93 0.97 0.96 2/64 369
/proc/meminfo: memFree=1277656/2055920 swapFree=4181340/4192956
[pid=369] ppid=367 vsize=18812 CPUtime=9.99
/proc/369/stat : 369 (PBS4L) R 367 369 323 0 -1 4194304 5469 0 0 0 997 2 0 0 25 0 1 0 191191747 19263488 3884 18446744073709551615 134512640 135466232 4294956672 18446744073709551615 134551321 0 0 4096 0 0 0 0 17 1 0 0
/proc/369/statm: 4703 3884 105 232 0 4468 0
Current children cumulated CPU time (s) 9.99
Current children cumulated vsize (Kb) 18812

Child status: 0
Real time (s): 10.9796
CPU time (s): 10.9743
CPU user time (s): 10.9453
CPU system time (s): 0.028995
CPU usage (%): 99.952
Max. virtual memory (cumulated for all children) (Kb): 18812

Launcher Data (download as text)

Begin job on node50 on Fri Jun  2 13:34:06 UTC 2006


FILE ID= 41257-1149255246

PBS_JOBID= 298356

BENCH NAME= ROOT/tmp/node50/41257-1149255246/instance-41257-1149255246.opb
COMMAND LINE= ROOT/solvers/PB/PB06final/user11/PBS4L ROOT/tmp/node50/41257-1149255246/instance-41257-1149255246.opb 572722681
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node50/watcher-41257-1149255246 -o ROOT/results/node50/solver-41257-1149255246 -C 1800 -M 1800 -S 64  ROOT/solvers/PB/PB06final/user11/PBS4L ROOT/tmp/node50/41257-1149255246/instance-41257-1149255246.opb 572722681

MD5SUM SOLVER= ab46593c31a6a47b9d9920387a00d332
MD5SUM BENCH=  a0b6152dd8614459e798b375ad9ceb75

RANDOM SEED= 572722681


/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 15
model		: 4
model name	:                   Intel(R) Xeon(TM) CPU 3.00GHz
stepping	: 3
cpu MHz		: 3000.238
cache size	: 2048 KB
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl cid cx16 xtpr
bogomips	: 5914.62
clflush size	: 64
cache_alignment	: 128
address sizes	: 36 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 15
model		: 4
model name	:                   Intel(R) Xeon(TM) CPU 3.00GHz
stepping	: 3
cpu MHz		: 3000.238
cache size	: 2048 KB
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm pni monitor ds_cpl cid cx16 xtpr
bogomips	: 5586.94
clflush size	: 64
cache_alignment	: 128
address sizes	: 36 bits physical, 48 bits virtual
power management:


/proc/meminfo:
MemTotal:      2055920 kB
MemFree:       1293096 kB
Buffers:         31512 kB
Cached:         658656 kB
SwapCached:       3432 kB
Active:          58376 kB
Inactive:       640740 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1293096 kB
SwapTotal:     4192956 kB
SwapFree:      4181340 kB
Dirty:             184 kB
Writeback:           0 kB
Mapped:          14928 kB
Slab:            49740 kB
Committed_AS:   240124 kB
PageTables:       1480 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264952 kB
VmallocChunk: 536605679 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:     2048 kB


End job on node50 on Fri Jun  2 13:34:17 UTC 2006