Trace number 2082000

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. The first timestamp (if present) is estimated CPU time. The last timestamp is wall clock 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 NameAnswerCPU timeWall clock time
pcs-restart 0.3.2UNSAT 0.017997 0.0249679

DiagnosticValue
ASSIGNMENTS0

General information on the benchmark

Namecsp/super-queens/
normalized-super-queens-11.xml
MD5SUMd024b00d7492160e14e33ed9f6aa64a5
Bench Category2-ARY-INT (binary constraints in intension)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.008998
Satisfiable
(Un)Satisfiability was proved
Number of variables8
Number of constraints22
Maximum constraint arity2
Maximum domain size4
Number of constraints which are defined in extension0
Number of constraints which are defined in intension22
Global constraints used (with number of constraints)

Solver Data 

0.00/0.01	c has operations which may create big domains
0.00/0.01	c big-domain mode
0.00/0.02	c Seed is 1456302336
0.00/0.02	c Constructing HOME/instance-2082000-1247720704.xml 
0.00/0.02	c deduced all_different(V2,V4,V6,V0)
0.00/0.02	c deduced all_different(V0,V2,V4,V6,V1)
0.00/0.02	c deduced all_different(V0,V2,V4,V6,V3)
0.00/0.02	c deduced all_different(V0,V2,V4,V6,V5)
0.00/0.02	c deduced all_different(V0,V2,V4,V6,V7)
0.00/0.02	c  with 81 constraints
0.00/0.02	c Solving 0 backtracks
0.00/0.02	s UNSATISFIABLE
0.00/0.02	d ASSIGNMENTS 0

Verifier Data 

No possible verification on an UNSAT instance

Watcher Data 

runsolver version 3.2.9 (svn:492) (c) roussel@cril.univ-artois.fr

command line: BIN/runsolver --timestamp -w /tmp/evaluation-result-2082000-1247720704/watcher-2082000-1247720704 -o /tmp/evaluation-result-2082000-1247720704/solver-2082000-1247720704 -C 1800 -W 2000 -M 900 HOME/pcssolve -s 1456302336 HOME/instance-2082000-1247720704.xml 

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 1800 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 1830 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 2000 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 921600 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 972800 KiB
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 2.07 2.02 2.00 4/72 21232
/proc/meminfo: memFree=1466656/2055920 swapFree=4192812/4192956
[pid=21232] ppid=21230 vsize=5356 CPUtime=0
/proc/21232/stat : 21232 (pcssolve) R 21230 21232 18473 0 -1 4194304 290 0 0 0 0 0 0 0 23 0 1 0 59137065 5484544 241 996147200 4194304 4889804 548682068800 18446744073709551615 217871608479 0 65538 4100 65536 0 0 0 17 1 0 0
/proc/21232/statm: 1339 241 200 169 0 50 0
[pid=21233] ppid=21232 vsize=3676 CPUtime=0
/proc/21233/stat : 21233 (fgrep) R 21232 21232 18473 0 -1 4194304 141 0 0 0 0 0 0 0 24 0 1 0 59137066 3764224 108 996147200 4194304 4274172 548682068976 18446744073709551615 217871420928 0 0 4096 0 0 0 0 17 1 0 0
/proc/21233/statm: 919 108 87 19 0 43 0
[pid=21234] ppid=21232 vsize=5356 CPUtime=0
/proc/21234/stat : 21234 (pcssolve) R 21232 21232 18473 0 -1 4194368 0 0 0 0 0 0 0 0 23 0 1 0 59137066 5484544 241 996147200 4194304 4889804 548682068800 18446744073709551615 217871608479 0 65538 4100 65536 0 0 0 17 1 0 0
/proc/21234/statm: 1339 241 200 169 0 50 0

Solver just ended. Dumping a history of the last processes samples

Child status: 0
Real time (s): 0.0249679
CPU time (s): 0.017997
CPU user time (s): 0.004999
CPU system time (s): 0.012998
CPU usage (%): 72.0805
Max. virtual memory (cumulated for all children) (KiB): 0

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.004999
system time used= 0.012998
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 1651
page faults= 0
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 21
involuntary context switches= 8

runsolver used 0.001999 second user time and 0.008998 second system time

The end

Launcher Data 

Begin job on node28 at 2009-07-16 07:05:04
IDJOB=2082000
IDBENCH=57519
IDSOLVER=734
FILE ID=node28/2082000-1247720704
PBS_JOBID= 9521391
Free space on /tmp= 66008 MiB

SOLVER NAME= pcs-restart 0.2.restart
BENCH NAME= CPAI08/csp/super-queens/normalized-super-queens-11.xml
COMMAND LINE= HOME/pcssolve -s RANDOMSEED BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-2082000-1247720704/watcher-2082000-1247720704 -o /tmp/evaluation-result-2082000-1247720704/solver-2082000-1247720704 -C 1800 -W 2000 -M 900  HOME/pcssolve -s 1456302336 HOME/instance-2082000-1247720704.xml

TIME LIMIT= 1800 seconds
MEMORY LIMIT= 900 MiB
MAX NB THREAD= 0

MD5SUM BENCH= d024b00d7492160e14e33ed9f6aa64a5
RANDOM SEED=1456302336

node28.alineos.net Linux 2.6.9-22.EL.rootsmp #1 SMP Mon Oct 3 08:59:52 CEST 2005

/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		: 3000.230
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		: 3000.230
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:       1467136 kB
Buffers:         43856 kB
Cached:         161572 kB
SwapCached:          0 kB
Active:         393604 kB
Inactive:       131688 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1467136 kB
SwapTotal:     4192956 kB
SwapFree:      4192812 kB
Dirty:            2240 kB
Writeback:           0 kB
Mapped:         331344 kB
Slab:            48008 kB
Committed_AS:   876004 kB
PageTables:       2420 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264960 kB
VmallocChunk: 536605679 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 66008 MiB
End job on node28 at 2009-07-16 07:05:05