Trace number 1825729

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
SATzilla2009_C 2009-03-22UNSAT 15.3047 15.3902

General information on the benchmark

Namecrafted/Difficult/contest05/others/
pmg-12-UNSAT.sat05-3940.reshuffled-07.cnf
MD5SUMcb7fcc0a671d4e8fcabb476bdf51a2fc
Bench CategoryCRAFTED (crafted instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark15.3047
Satisfiable
(Un)Satisfiability was proved
Number of variables190
Number of clauses632
Sum of the clauses size1894
Maximum clause length3
Minimum clause length2
Number of clauses of size 10
Number of clauses of size 22
Number of clauses of size 3630
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data

15.27/15.31	c SATzilla is building models for class 2
15.27/15.31	c run presolver march_dl2004 for 5 seconds ... 
15.27/15.31	c Bin: Executing march_dl2004
15.27/15.31	c spawning binary file with 5 seconds ...
15.27/15.31	c child exit by a signal
15.27/15.31	c march_dl2004 returned code 137.
15.27/15.31	c run presolver mxc-sr08 for 5 seconds ... 
15.27/15.31	c Bin: Executing mxc-sr08
15.27/15.31	c spawning binary file with 5 seconds ...
15.27/15.31	c child exit by a signal
15.27/15.31	c mxc-sr08 returned code 137.
15.27/15.31	c Orignal number of varibales is 190, number of clauses is 632 
15.27/15.31	c predicted feature computation time is 6.895375 
15.27/15.31	c Bin: Executing satelite
15.27/15.31	c spawning binary file with 240 seconds ...
15.27/15.31	c child exited successfully
15.27/15.31	c satzilla computing base features
15.27/15.31	c Number of variabe is: 189, Number of clause is : 629 
15.27/15.31	c Initializing...
15.27/15.31	c satzilla compute diameter ...
15.27/15.31	c start diameter features ...
15.27/15.31	c satzilla doing clause learning
15.27/15.31	c start clause learning features ...
15.27/15.31	c Bin: Executing zchaff07
15.27/15.31	c spawning binary file with 2 seconds ...
15.27/15.31	c child exit by a signal
15.27/15.31	c satzilla doing survey propogation probe
15.27/15.31	c do survay propogation for 2 second ...
15.27/15.31	c satzilla doing local search probe
15.27/15.31	c satzilla doing lobjois search-space size estimate
15.27/15.31	c features are:190 632 189 629 0.00529101 0.00476948 0.300477 0.504505 0.579059 0.58184 0.0158646 0.0132873 0.010582 0.015873 0.0118336 0.00158983 1 0.0158646 0.0177288 0.0127186 0.0158983 0.0916138 0.198001 0.0170662 0 0.2 0.0916138 0.00799118 0.271068 0.00317965 0.0127186 1.65362 0.503975 0.0063593 0 0.0063593 0.0063593 7.55319 0.127541 7 11 0.989072 4463.33 0.0473479 4178 4683 4683 4178 4683 4178 4529 36.1629 0.0746635 32.8345 39.4478 39.4478 32.8345 39.4478 32.8345 36.2064 0.25724 0.0737492 0.00631549 0.300548 0.258299 0.257944 0.258008 0.257972 0.257995 0.110938 0.0230896 0.100087 0.142352 0.110933 0.110838 0.110901 0.110858 0.110877 9.86666 0.380619 35.376 0.128357 35 30 41 0.878736 0.265221 0.817944 0.0814632 0.117008 0.498044 
15.27/15.31	c satzilla's ranking:
15.27/15.31	c 1) vallst: 3.255180
15.27/15.31	c 2) minisat20SAT07: 2.451021
15.27/15.31	c 3) minisat20: 2.214993
15.27/15.31	c 4) mxc-sr08: 2.164708
15.27/15.31	c 5) march_dl2004: 1.539291
15.27/15.31	c 6) tts-4-0: 0.595152
15.27/15.31	c 7) zchaff_rand: 0.274024
15.27/15.31	c 8) SATenstein: -10000.000000
15.27/15.31	c 9) gnovelty+: -10000.000000
15.27/15.31	c 10) adaptg2wsat+: -10000.000000
15.27/15.31	c 11) adaptg2wsat0: -10000.000000
15.27/15.31	c 12) picosat846: -10000.000000
15.27/15.31	c 13) kcnfs04SAT07: -10000.000000
15.27/15.31	c satzilla running vallst ... 
15.27/15.38	c Bin: Executing vallst
15.27/15.38	c spawning binary file with 4984 seconds ...
15.27/15.38	c child exited successfully
15.27/15.38	c vallst returned code 20.
15.27/15.38	s UNSATISFIABLE
15.27/15.38	c SATZILLA_TIME=15.290000

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-1825729-1242506118/watcher-1825729-1242506118 -o /tmp/evaluation-result-1825729-1242506118/solver-1825729-1242506118 -C 5000 -W 6000 -M 1800 HOME/SATzilla2009_C HOME/instance-1825729-1242506118.cnf 

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 5000 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 5030 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 6000 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 1843200 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 1894400 KiB
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 1.00 1.00 1.00 3/64 31908
/proc/meminfo: memFree=1564472/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=2056 CPUtime=0
/proc/31908/stat : 31908 (SATzilla2009_C) S 31906 31908 31600 0 -1 4194304 132 0 0 0 0 0 0 0 18 0 1 0 278645770 2105344 112 1992294400 134512640 136149437 4294956224 18446744073709551615 135542781 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/31908/statm: 514 112 96 399 0 111 0
[pid=31909] ppid=31908 vsize=772 CPUtime=0
/proc/31909/stat : 31909 (march_dl2004) R 31908 31908 31600 0 -1 4194304 119 0 0 0 0 0 0 0 19 0 1 0 278645771 790528 111 1992294400 134512640 134996440 4294956192 18446744073709551615 134529408 0 0 8392704 0 0 0 0 17 0 0 0
/proc/31909/statm: 193 112 69 118 0 72 0

[startup+0.0440139 s]
/proc/loadavg: 1.00 1.00 1.00 3/64 31908
/proc/meminfo: memFree=1564472/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=2056 CPUtime=0
/proc/31908/stat : 31908 (SATzilla2009_C) S 31906 31908 31600 0 -1 4194304 132 0 0 0 0 0 0 0 18 0 1 0 278645770 2105344 112 1992294400 134512640 136149437 4294956224 18446744073709551615 135542781 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/31908/statm: 514 112 96 399 0 111 0
[pid=31909] ppid=31908 vsize=744 CPUtime=0.04
/proc/31909/stat : 31909 (march_dl2004) R 31908 31908 31600 0 -1 4194304 146 0 0 0 4 0 0 0 19 0 1 0 278645771 761856 138 1992294400 134512640 134996440 4294956192 18446744073709551615 134531609 0 0 8392704 0 0 0 0 17 0 0 0
/proc/31909/statm: 186 138 75 118 0 65 0
Current children cumulated CPU time (s) 0.04
Current children cumulated vsize (KiB) 2800

[startup+0.101024 s]
/proc/loadavg: 1.00 1.00 1.00 3/64 31908
/proc/meminfo: memFree=1564472/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=2056 CPUtime=0
/proc/31908/stat : 31908 (SATzilla2009_C) S 31906 31908 31600 0 -1 4194304 132 0 0 0 0 0 0 0 18 0 1 0 278645770 2105344 112 1992294400 134512640 136149437 4294956224 18446744073709551615 135542781 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/31908/statm: 514 112 96 399 0 111 0
[pid=31909] ppid=31908 vsize=744 CPUtime=0.09
/proc/31909/stat : 31909 (march_dl2004) R 31908 31908 31600 0 -1 4194304 147 0 0 0 9 0 0 0 19 0 1 0 278645771 761856 139 1992294400 134512640 134996440 4294956192 18446744073709551615 134552222 0 0 8392704 0 0 0 0 17 0 0 0
/proc/31909/statm: 186 139 75 118 0 65 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 2800

[startup+0.301058 s]
/proc/loadavg: 1.00 1.00 1.00 3/64 31908
/proc/meminfo: memFree=1564472/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=2056 CPUtime=0
/proc/31908/stat : 31908 (SATzilla2009_C) S 31906 31908 31600 0 -1 4194304 132 0 0 0 0 0 0 0 18 0 1 0 278645770 2105344 112 1992294400 134512640 136149437 4294956224 18446744073709551615 135542781 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/31908/statm: 514 112 96 399 0 111 0
[pid=31909] ppid=31908 vsize=744 CPUtime=0.29
/proc/31909/stat : 31909 (march_dl2004) R 31908 31908 31600 0 -1 4194304 148 0 0 0 29 0 0 0 21 0 1 0 278645771 761856 140 1992294400 134512640 134996440 4294956192 18446744073709551615 134528039 0 0 8392704 0 0 0 0 17 0 0 0
/proc/31909/statm: 186 140 75 118 0 65 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 2800

[startup+0.701128 s]
/proc/loadavg: 1.00 1.00 1.00 3/64 31908
/proc/meminfo: memFree=1564472/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=2056 CPUtime=0
/proc/31908/stat : 31908 (SATzilla2009_C) S 31906 31908 31600 0 -1 4194304 132 0 0 0 0 0 0 0 18 0 1 0 278645770 2105344 112 1992294400 134512640 136149437 4294956224 18446744073709551615 135542781 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/31908/statm: 514 112 96 399 0 111 0
[pid=31909] ppid=31908 vsize=744 CPUtime=0.69
/proc/31909/stat : 31909 (march_dl2004) R 31908 31908 31600 0 -1 4194304 149 0 0 0 69 0 0 0 25 0 1 0 278645771 761856 141 1992294400 134512640 134996440 4294956192 18446744073709551615 134553316 0 0 8392704 0 0 0 0 17 0 0 0
/proc/31909/statm: 186 141 75 118 0 65 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 2800

[startup+1.50127 s]
/proc/loadavg: 1.00 1.00 1.00 2/66 31910
/proc/meminfo: memFree=1564072/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=2056 CPUtime=0
/proc/31908/stat : 31908 (SATzilla2009_C) S 31906 31908 31600 0 -1 4194304 132 0 0 0 0 0 0 0 18 0 1 0 278645770 2105344 112 1992294400 134512640 136149437 4294956224 18446744073709551615 135542781 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/31908/statm: 514 112 96 399 0 111 0
[pid=31909] ppid=31908 vsize=744 CPUtime=1.49
/proc/31909/stat : 31909 (march_dl2004) R 31908 31908 31600 0 -1 4194304 149 0 0 0 149 0 0 0 25 0 1 0 278645771 761856 141 1992294400 134512640 134996440 4294956192 18446744073709551615 134527720 0 0 8392704 0 0 0 0 17 0 0 0
/proc/31909/statm: 186 141 75 118 0 65 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 2800

[startup+3.10155 s]
/proc/loadavg: 1.00 1.00 1.00 2/66 31910
/proc/meminfo: memFree=1563944/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=2056 CPUtime=0
/proc/31908/stat : 31908 (SATzilla2009_C) S 31906 31908 31600 0 -1 4194304 132 0 0 0 0 0 0 0 18 0 1 0 278645770 2105344 112 1992294400 134512640 136149437 4294956224 18446744073709551615 135542781 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/31908/statm: 514 112 96 399 0 111 0
[pid=31909] ppid=31908 vsize=744 CPUtime=3.09
/proc/31909/stat : 31909 (march_dl2004) R 31908 31908 31600 0 -1 4194304 150 0 0 0 309 0 0 0 25 0 1 0 278645771 761856 142 1992294400 134512640 134996440 4294956192 18446744073709551615 134617596 0 0 8392704 0 0 0 0 17 0 0 0
/proc/31909/statm: 186 142 75 118 0 65 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 2800

[startup+6.30111 s]
/proc/loadavg: 1.00 1.00 1.00 2/66 31911
/proc/meminfo: memFree=1562984/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=2056 CPUtime=4.99
/proc/31908/stat : 31908 (SATzilla2009_C) S 31906 31908 31600 0 -1 4194304 156 150 0 0 0 0 499 0 19 0 1 0 278645770 2105344 125 1992294400 134512640 136149437 4294956224 18446744073709551615 135542781 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/31908/statm: 514 125 107 399 0 111 0
[pid=31911] ppid=31908 vsize=1520 CPUtime=1.28
/proc/31911/stat : 31911 (mxc-sr08) R 31908 31908 31600 0 -1 4194304 289 0 0 0 127 1 0 0 25 0 1 0 278646271 1556480 285 1992294400 134512640 135078026 4294956192 18446744073709551615 134534603 0 0 8392704 0 0 0 0 17 0 0 0
/proc/31911/statm: 380 285 71 138 0 239 0
Current children cumulated CPU time (s) 6.27
Current children cumulated vsize (KiB) 3576

[startup+12.7012 s]
/proc/loadavg: 1.00 1.00 1.00 2/66 31913
/proc/meminfo: memFree=1561192/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=7312 CPUtime=12.67
/proc/31908/stat : 31908 (SATzilla2009_C) R 31906 31908 31600 0 -1 4194304 407 1669 0 0 59 9 1197 2 24 0 1 0 278645770 7487488 330 1992294400 134512640 136149437 4294956224 18446744073709551615 135542670 0 0 4096 3 0 0 0 17 0 0 0
/proc/31908/statm: 1828 330 207 399 0 1425 0
Current children cumulated CPU time (s) 12.67
Current children cumulated vsize (KiB) 7312

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

[startup+14.3055 s]
/proc/loadavg: 1.00 1.00 1.00 2/65 31913
/proc/meminfo: memFree=1564144/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=7312 CPUtime=14.28
/proc/31908/stat : 31908 (SATzilla2009_C) R 31906 31908 31600 0 -1 4194304 407 1669 0 0 199 30 1197 2 25 0 1 0 278645770 7487488 330 1992294400 134512640 136149437 4294956224 18446744073709551615 135542670 0 0 4096 3 0 0 0 17 0 0 0
/proc/31908/statm: 1828 330 207 399 0 1425 0
Current children cumulated CPU time (s) 14.28
Current children cumulated vsize (KiB) 7312

[startup+15.1016 s]
/proc/loadavg: 1.00 1.00 1.00 2/65 31913
/proc/meminfo: memFree=1564144/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=3212 CPUtime=15.07
/proc/31908/stat : 31908 (SATzilla2009_C) R 31906 31908 31600 0 -1 4194304 450 1669 0 0 276 32 1197 2 25 0 1 0 278645770 3289088 327 1992294400 134512640 136149437 4294956224 18446744073709551615 135542670 0 0 4096 3 0 0 0 17 0 0 0
/proc/31908/statm: 803 327 213 399 0 400 0
Current children cumulated CPU time (s) 15.07
Current children cumulated vsize (KiB) 3212

[startup+15.3017 s]
/proc/loadavg: 1.00 1.00 1.00 2/65 31913
/proc/meminfo: memFree=1564144/2055920 swapFree=4180872/4192956
[pid=31908] ppid=31906 vsize=3212 CPUtime=15.27
/proc/31908/stat : 31908 (SATzilla2009_C) R 31906 31908 31600 0 -1 4194304 452 1669 0 0 296 32 1197 2 25 0 1 0 278645770 3289088 329 1992294400 134512640 136149437 4294956224 18446744073709551615 135330172 0 0 4096 3 0 0 0 17 0 0 0
/proc/31908/statm: 803 329 213 399 0 400 0
Current children cumulated CPU time (s) 15.27
Current children cumulated vsize (KiB) 3212

Child status: 20
Real time (s): 15.3902
CPU time (s): 15.3047
CPU user time (s): 14.9477
CPU system time (s): 0.356945
CPU usage (%): 99.4442
Max. virtual memory (cumulated for all children) (KiB): 7312

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 14.9477
system time used= 0.356945
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 2330
page faults= 10
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 43
involuntary context switches= 33

runsolver used 0.022996 second user time and 0.042993 second system time

The end

Launcher Data

Begin job on node4 at 2009-05-16 22:35:18
IDJOB=1825729
IDBENCH=24733
IDSOLVER=668
FILE ID=node4/1825729-1242506118
PBS_JOBID= 9306975
Free space on /tmp= 66176 MiB

SOLVER NAME= SATzilla2009_C 2009-03-22
BENCH NAME= SAT07/crafted/Difficult/contest05/others/pmg-12-UNSAT.sat05-3940.reshuffled-07.cnf
COMMAND LINE= HOME/SATzilla2009_C BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-1825729-1242506118/watcher-1825729-1242506118 -o /tmp/evaluation-result-1825729-1242506118/solver-1825729-1242506118 -C 5000 -W 6000 -M 1800  HOME/SATzilla2009_C HOME/instance-1825729-1242506118.cnf

TIME LIMIT= 5000 seconds
MEMORY LIMIT= 1800 MiB
MAX NB THREAD= 0

MD5SUM BENCH= cb7fcc0a671d4e8fcabb476bdf51a2fc
RANDOM SEED=871794986

node4.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:       1565016 kB
Buffers:         77184 kB
Cached:         321576 kB
SwapCached:       5908 kB
Active:         173524 kB
Inactive:       233220 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1565016 kB
SwapTotal:     4192956 kB
SwapFree:      4180872 kB
Dirty:           31512 kB
Writeback:           0 kB
Mapped:          13616 kB
Slab:            70212 kB
Committed_AS:  1155812 kB
PageTables:       1468 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= 66148 MiB
End job on node4 at 2009-05-16 22:35:33