Trace number 198660

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 NameAnswerCPU timeWall clock time
buggy_2_5_s 2007-01-08UNSAT 0.061989 0.06509

General information on the benchmark

Namepigeons/
pigeons-7.xml
MD5SUM3c024efc757c8062f080841c700eb01e
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 benchmark0.018996
SatisfiableNO
(Un)Satisfiability was provedNO
Number of variables7
Number of constraints21
Maximum constraint arity2
Maximum domain size6
Number of constraints which are defined in extension0
Number of constraints which are defined in intension21
Global constraints used (with number of constraints)

Solver Data (download as text)

c 
c 
c 
c solution file
c 
c 

UNSAT

Verifier Data (download as text)

No possible verification on an UNSAT instance

Watcher Data (download as text)

runsolver version 3.1.3 (c) roussel@cril.univ-artois.fr

command line: runsolver --timestamp -w ROOT/results/node2/watcher-198660-1168285426 -o ROOT/results/node2/solver-198660-1168285426 -C 1800 -M 900 /tmp/evaluation/198660-1168285426/solver2 /tmp/evaluation/198660-1168285426/unknown 1800 

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 1800 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 1830 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

/proc/loadavg: 0.92 1.06 1.38 4/78 24484
/proc/meminfo: memFree=1712632/2055920 swapFree=4191880/4192956
[pid=24483] ppid=24481 vsize=5352 CPUtime=0
/proc/24483/stat : 24483 (solver2) R 24481 24483 18067 0 -1 4194304 313 190 0 0 0 0 0 0 19 0 1 0 176938376 5480448 241 18446744073709551615 4194304 4889804 548682069328 18446744073709551615 206381312671 0 65538 4100 65536 0 0 0 17 1 0 0
/proc/24483/statm: 1338 241 202 169 0 49 0

Child status: 0
Real time (s): 0.06509
CPU time (s): 0.061989
CPU user time (s): 0.032994
CPU system time (s): 0.028995
CPU usage (%): 95.2358
Max. virtual memory (cumulated for all children) (KiB): 0

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.032994
system time used= 0.028995
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 3214
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= 77
involuntary context switches= 17

runsolver used 0.001999 s user time and 0.006998 s system time

The end

Launcher Data (download as text)

Begin job on node2 on Mon Jan  8 19:43:47 UTC 2007


IDJOB= 198660
IDBENCH= 3569
FILE ID= node2/198660-1168285426

PBS_JOBID= 3501631

Free space on /tmp= 66331 MiB

BENCH NAME= HOME/pub/bench/CPAI06/pigeons/pigeons-7.xml
COMMAND LINE= /tmp/evaluation/198660-1168285426/solver2 /tmp/evaluation/198660-1168285426/unknown 1800
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node2/watcher-198660-1168285426 -o ROOT/results/node2/solver-198660-1168285426 -C 1800 -M 900  /tmp/evaluation/198660-1168285426/solver2 /tmp/evaluation/198660-1168285426/unknown 1800

META MD5SUM SOLVER= 2182e29fee250f6e45b9a85a6429fa3a
MD5SUM BENCH=  3c024efc757c8062f080841c700eb01e

RANDOM SEED= 91527616

TIME LIMIT= 1800 seconds

MEMORY LIMIT= 900 MiB


/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		: 3000.259
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	: 5931.00
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		: 3000.259
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:       1713048 kB
Buffers:         47020 kB
Cached:         191236 kB
SwapCached:        288 kB
Active:         212452 kB
Inactive:        81356 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1713048 kB
SwapTotal:     4192956 kB
SwapFree:      4191880 kB
Dirty:           10076 kB
Writeback:           0 kB
Mapped:          73832 kB
Slab:            34364 kB
Committed_AS:  4610776 kB
PageTables:       1992 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264952 kB
VmallocChunk: 536605679 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 66331 MiB



End job on node2 on Mon Jan  8 19:43:47 UTC 2007