Trace number 2086961

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 0.037994 0.0449741

DiagnosticValue
ASSIGNMENTS5

General information on the benchmark

Namecsp/langford4/
normalized-langford-4-6.xml
MD5SUM9c67e5ee3d162a7a5b0bc1b6ab9cde07
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 benchmark0.014997
Satisfiable
(Un)Satisfiability was proved
Number of variables24
Number of constraints294
Maximum constraint arity2
Maximum domain size24
Number of constraints which are defined in extension0
Number of constraints which are defined in intension294
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
0.00/0.04	c Seed is 1111540476
0.00/0.04	c Constructing HOME/instance-2086961-1247727022.xml 
0.00/0.04	c deduced all_different(V1,V2,V3,V4,V5,V6,V7,V8,V9,V10,V11,V12,V13,V14,V15,V16,V17,V18,V19,V20,V21,V22,V23,V0)
0.00/0.04	c  with 295 constraints
0.00/0.04	c Solving 5 backtracks
0.00/0.04	s UNSATISFIABLE
0.00/0.04	d ASSIGNMENTS 5

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-2086961-1247727022/watcher-2086961-1247727022 -o /tmp/evaluation-result-2086961-1247727022/solver-2086961-1247727022 -C 1800 -W 2000 -M 900 HOME/pcssolve -s 1111540476 HOME/instance-2086961-1247727022.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 2.06 2.02 4/81 12821
/proc/meminfo: memFree=1352976/2055920 swapFree=4192812/4192956
[pid=12821] ppid=12819 vsize=5356 CPUtime=0
/proc/12821/stat : 12821 (pcssolve) R 12819 12821 12572 0 -1 4194304 290 0 0 0 0 0 0 0 21 0 1 0 59768883 5484544 241 996147200 4194304 4889804 548682068800 18446744073709551615 227848809119 0 65538 4100 65536 0 0 0 17 1 0 0
/proc/12821/statm: 1339 241 200 169 0 50 0
[pid=12822] ppid=12821 vsize=1332 CPUtime=0
/proc/12822/stat : 12822 (fgrep) R 12821 12821 12572 0 -1 4194304 53 0 0 0 0 0 0 0 22 0 1 0 59768884 1363968 31 996147200 4194304 4274172 548682068976 18446744073709551615 227846191148 0 0 4096 0 0 0 0 17 1 0 0
/proc/12822/statm: 333 31 24 19 0 4 0
[pid=12823] ppid=12821 vsize=5356 CPUtime=0
/proc/12823/stat : 12823 (pcssolve) R 12821 12821 12572 0 -1 4194368 0 0 0 0 0 0 0 0 21 0 1 0 59768884 5484544 241 996147200 4194304 4889804 548682068800 18446744073709551615 227848809119 0 65538 4100 65536 0 0 0 17 1 0 0
/proc/12823/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): 0.0449741
CPU time (s): 0.037994
CPU user time (s): 0.024996
CPU system time (s): 0.012998
CPU usage (%): 84.4797
Max. virtual memory (cumulated for all children) (KiB): 0

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.024996
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= 1696
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= 22
involuntary context switches= 9

runsolver used 0.002999 second user time and 0.007998 second system time

The end

Launcher Data 

Begin job on node18 at 2009-07-16 08:50:22
IDJOB=2086961
IDBENCH=58666
IDSOLVER=734
FILE ID=node18/2086961-1247727022
PBS_JOBID= 9521565
Free space on /tmp= 66312 MiB

SOLVER NAME= pcs-restart 0.2.restart
BENCH NAME= CPAI08/csp/langford4/normalized-langford-4-6.xml
COMMAND LINE= HOME/pcssolve -s RANDOMSEED BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-2086961-1247727022/watcher-2086961-1247727022 -o /tmp/evaluation-result-2086961-1247727022/solver-2086961-1247727022 -C 1800 -W 2000 -M 900  HOME/pcssolve -s 1111540476 HOME/instance-2086961-1247727022.xml

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

MD5SUM BENCH= 9c67e5ee3d162a7a5b0bc1b6ab9cde07
RANDOM SEED=1111540476

node18.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		: 3000.243
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		: 3000.243
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:       1353456 kB
Buffers:         89276 kB
Cached:         374756 kB
SwapCached:          0 kB
Active:         244384 kB
Inactive:       378172 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1353456 kB
SwapTotal:     4192956 kB
SwapFree:      4192812 kB
Dirty:            1980 kB
Writeback:           0 kB
Mapped:         178904 kB
Slab:            64852 kB
Committed_AS:   694196 kB
PageTables:       2092 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= 66312 MiB
End job on node18 at 2009-07-16 08:50:23