Trace number 2086902

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
Mistral 1.545UNSAT 0.033994 0.0465109

DiagnosticValue
ASSIGNMENTS40
CHECKS13017
NODES40

General information on the benchmark

Namecsp/langford4/
normalized-langford-4-8.xml
MD5SUMe02ab284be8165bbf8650c2ca610d92a
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 benchmark0.033994
Satisfiable
(Un)Satisfiability was proved
Number of variables32
Number of constraints520
Maximum constraint arity2
Maximum domain size32
Number of constraints which are defined in extension0
Number of constraints which are defined in intension520
Global constraints used (with number of constraints)

Solver Data 

0.00/0.00	c mistral version 1.545
0.00/0.02	s UNSATISFIABLE
0.00/0.02	d CHECKS 13017
0.00/0.03	d ASSIGNMENTS 40
0.00/0.03	d NODES 40 BACKTRACKS 39 FAILURES 40 RUNTIME 0.01 TOTALTIME 0.02 NODES/s 4000 CHECKS/s 1.3017e+06

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-2086902-1247384616/watcher-2086902-1247384616 -o /tmp/evaluation-result-2086902-1247384616/solver-2086902-1247384616 -C 1800 -W 2000 -M 900 /home/evaluation/evaluation/libc32/lib/ld-linux.so.2 ./xsolve HOME/instance-2086902-1247384616.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: 2.10 2.04 2.01 4/83 23766
/proc/meminfo: memFree=1244672/2055920 swapFree=4192812/4192956
[pid=23766] ppid=23764 vsize=4804 CPUtime=0
/proc/23766/stat : 23766 (ld-linux.so.2) R 23764 23766 23423 0 -1 4194304 183 0 0 0 0 0 0 0 18 0 1 0 25529266 4919296 164 996147200 1448431616 1448550632 4294956208 18446744073709551615 1448480889 0 0 4096 0 0 0 0 17 0 0 0
/proc/23766/statm: 1201 164 139 29 0 16 0

[startup+0.039218 s]
/proc/loadavg: 2.10 2.04 2.01 4/83 23766
/proc/meminfo: memFree=1244672/2055920 swapFree=4192812/4192956
[pid=23766] ppid=23764 vsize=5212 CPUtime=0.02
/proc/23766/stat : 23766 (ld-linux.so.2) D 23764 23766 23423 0 -1 4194304 585 0 3 0 2 0 0 0 18 0 1 0 25529266 5337088 567 996147200 1448431616 1448550632 4294956208 18446744073709551615 4160153744 0 0 4096 0 18446744071563479169 0 0 17 0 0 0
/proc/23766/statm: 1303 567 452 29 0 118 0
Current children cumulated CPU time (s) 0.02
Current children cumulated vsize (KiB) 5212

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

[startup+0.039218 s]
/proc/loadavg: 2.10 2.04 2.01 4/83 23766
/proc/meminfo: memFree=1244672/2055920 swapFree=4192812/4192956
[pid=23766] ppid=23764 vsize=5212 CPUtime=0.02
/proc/23766/stat : 23766 (ld-linux.so.2) D 23764 23766 23423 0 -1 4194304 585 0 3 0 2 0 0 0 18 0 1 0 25529266 5337088 567 996147200 1448431616 1448550632 4294956208 18446744073709551615 4160153744 0 0 4096 0 18446744071563479169 0 0 17 0 0 0
/proc/23766/statm: 1303 567 452 29 0 118 0
Current children cumulated CPU time (s) 0.02
Current children cumulated vsize (KiB) 5212

Child status: 0
Real time (s): 0.0465109
CPU time (s): 0.033994
CPU user time (s): 0.024996
CPU system time (s): 0.008998
CPU usage (%): 73.0883
Max. virtual memory (cumulated for all children) (KiB): 5212

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.024996
system time used= 0.008998
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 589
page faults= 6
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 30
involuntary context switches= 19

runsolver used 0.001999 second user time and 0.009998 second system time

The end

Launcher Data 

Begin job on node2 at 2009-07-12 09:43:36
IDJOB=2086902
IDBENCH=58657
IDSOLVER=769
FILE ID=node2/2086902-1247384616
PBS_JOBID= 9507277
Free space on /tmp= 66336 MiB

SOLVER NAME= Mistral 1.545
BENCH NAME= CPAI08/csp/langford4/normalized-langford-4-8.xml
COMMAND LINE= /home/evaluation/evaluation/libc32/lib/ld-linux.so.2 ./xsolve BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-2086902-1247384616/watcher-2086902-1247384616 -o /tmp/evaluation-result-2086902-1247384616/solver-2086902-1247384616 -C 1800 -W 2000 -M 900  /home/evaluation/evaluation/libc32/lib/ld-linux.so.2 ./xsolve HOME/instance-2086902-1247384616.xml

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

MD5SUM BENCH= e02ab284be8165bbf8650c2ca610d92a
RANDOM SEED=1659556027

node2.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		: 3000.265
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		: 3000.265
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:       1245152 kB
Buffers:          9036 kB
Cached:          63452 kB
SwapCached:          0 kB
Active:         742768 kB
Inactive:        20108 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1245152 kB
SwapTotal:     4192956 kB
SwapFree:      4192812 kB
Dirty:            1480 kB
Writeback:           0 kB
Mapped:         706064 kB
Slab:            31708 kB
Committed_AS:   879864 kB
PageTables:       3236 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= 66336 MiB
End job on node2 at 2009-07-12 09:43:36