Trace number 369996

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
MXC 2007-02-08UNSAT 68.8405 68.8712

General information on the benchmark

Namecrafted/spence/
medium/s77-100.cnf
MD5SUM124e32713f66a3b30ead344822177706
Bench CategoryCRAFTED (crafted instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark16.0036
Satisfiable
(Un)Satisfiability was proved
Number of variables77
Number of clauses164
Sum of the clauses size492
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 3164
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data (download as text)

68.78/68.86	c MXC attempting /tmp/evaluation/369996-1177550587/instance-369996-1177550587.cnf
68.78/68.86	c 0 assignments made, starting to guess now
68.78/68.86	c ===================================[MXC]=====================================
68.78/68.86	c | Conflicts |     ORIGINAL     |             LEARNT              | Progress |
68.78/68.86	c |           | Clauses Literals |  Limit Clauses Literals  Lit/Cl |          |
68.78/68.86	c =============================================================================
68.78/68.86	c |         0 |     164      492 |    1000       0       0     nan |  0.000 % |
68.78/68.86	c |       101 |     164      492 |    1100     101    1410    14.0 |  0.000 % |
68.78/68.86	c |       251 |     164      492 |    1210     251    3309    13.2 |  0.000 % |
68.78/68.86	c |       477 |     164      492 |    1331     477    6458    13.5 |  0.000 % |
68.78/68.86	c |       814 |     164      492 |    1464     814   11776    14.5 |  0.000 % |
68.78/68.86	c |      1321 |     164      492 |    1610    1321   18660    14.1 |  0.000 % |
68.78/68.86	c |      2080 |     164      492 |    1771    1274   17241    13.5 |  0.000 % |
68.78/68.86	c |      3220 |     164      492 |    1948    1528   20985    13.7 |  0.000 % |
68.78/68.87	c |      4928 |     164      492 |    2143    1287   15783    12.3 |  0.000 % |
68.78/68.87	c |      7491 |     164      492 |    2357    1707   22282    13.1 |  0.000 % |
68.78/68.87	c |     11336 |     164      492 |    2593    2015   26036    12.9 |  0.000 % |
68.78/68.87	c |     17102 |     164      492 |    2853    2592   37794    14.6 |  0.000 % |
68.78/68.87	c |     25751 |     164      492 |    3138    2681   32495    12.1 |  0.000 % |
68.78/68.87	c |     38727 |     164      492 |    3452    3107   43498    14.0 |  0.000 % |
68.78/68.87	c |     58189 |     164      492 |    3797    1866   25113    13.5 |  0.000 % |
68.78/68.87	c |     87381 |     164      492 |    4177    2581   29132    11.3 |  0.000 % |
68.78/68.87	c |    131171 |     164      492 |    4594    2524   28315    11.2 |  0.000 % |
68.78/68.87	c |    196855 |     164      492 |    5054    3917   46923    12.0 |  0.000 % |
68.78/68.87	c |    295383 |     164      492 |    5559    3939   47647    12.1 |  0.000 % |
68.78/68.87	c |    443172 |     164      492 |    6115    4483   56898    12.7 |  0.000 % |
68.78/68.87	c |    664856 |     164      492 |    6727    3069   34139    11.1 |  0.000 % |
68.78/68.87	c |    997382 |     164      492 |    7400    6090   62670    10.3 |  0.000 % |
68.78/68.87	c |   1496170 |     152      456 |    8140    5454   56727    10.4 |  2.597 % |
68.78/68.87	c 68.840s elapsed
68.78/68.87	c restarts: 22
68.78/68.87	c decisions: 1882295
68.78/68.87	c propagations: 31712090
68.78/68.87	c conflicts: 1559757
68.78/68.87	s UNSATISFIABLE

Verifier Data (download as text)

No possible verification on an UNSAT instance

Watcher Data (download as text)

runsolver version 3.2.3 (c) roussel@cril.univ-artois.fr

command line: runsolver --timestamp -w ROOT/results/node29/watcher-369996-1177550587 -o ROOT/results/node29/solver-369996-1177550587 -C 5000 -W 7500 -M 1800 --output-limit 1,15 /tmp/evaluation/369996-1177550587/mxc /tmp/evaluation/369996-1177550587/instance-369996-1177550587.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): 7500 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
Solver output will be limited to a maximum of 15728640 bytes. The first 1048576 bytes and the last 14680064 bytes will be preserved
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 0.92 0.98 0.91 3/77 3174
/proc/meminfo: memFree=1603416/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=932 CPUtime=0
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 96 0 0 0 0 0 0 0 18 0 1 0 202974487 954368 81 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134688363 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 233 81 59 122 0 107 0

[startup+0.082108 s]
/proc/loadavg: 0.92 0.98 0.91 3/77 3174
/proc/meminfo: memFree=1603416/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=1072 CPUtime=0.08
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 153 0 0 0 8 0 0 0 18 0 1 0 202974487 1097728 136 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134519587 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 268 136 67 122 0 142 0
Current children cumulated CPU time (s) 0.08
Current children cumulated vsize (KiB) 1072

[startup+0.10211 s]
/proc/loadavg: 0.92 0.98 0.91 3/77 3174
/proc/meminfo: memFree=1603416/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=1072 CPUtime=0.1
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 156 0 0 0 10 0 0 0 18 0 1 0 202974487 1097728 139 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134529412 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 268 139 67 122 0 142 0
Current children cumulated CPU time (s) 0.1
Current children cumulated vsize (KiB) 1072

[startup+0.302121 s]
/proc/loadavg: 0.92 0.98 0.91 3/77 3174
/proc/meminfo: memFree=1603416/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=1200 CPUtime=0.3
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 192 0 0 0 30 0 0 0 19 0 1 0 202974487 1228800 175 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134517376 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 300 175 67 122 0 174 0
Current children cumulated CPU time (s) 0.3
Current children cumulated vsize (KiB) 1200

[startup+0.701145 s]
/proc/loadavg: 0.92 0.98 0.91 3/77 3174
/proc/meminfo: memFree=1603416/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=1332 CPUtime=0.69
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 220 0 0 0 69 0 0 0 23 0 1 0 202974487 1363968 203 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134534724 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 333 203 67 122 0 207 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 1332

[startup+1.50119 s]
/proc/loadavg: 0.92 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1602768/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=1460 CPUtime=1.49
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 247 0 0 0 149 0 0 0 25 0 1 0 202974487 1495040 230 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134519602 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 365 230 67 122 0 239 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 1460

[startup+3.10129 s]
/proc/loadavg: 0.92 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1602512/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=1584 CPUtime=3.09
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 285 0 0 0 309 0 0 0 25 0 1 0 202974487 1622016 268 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134616938 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 396 268 67 122 0 270 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 1584

[startup+6.30149 s]
/proc/loadavg: 0.93 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1602256/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=1812 CPUtime=6.29
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 334 0 0 0 629 0 0 0 25 0 1 0 202974487 1855488 317 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134519590 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 453 317 67 122 0 327 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 1812

[startup+12.7019 s]
/proc/loadavg: 0.93 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1601936/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=2052 CPUtime=12.69
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 395 0 0 0 1269 0 0 0 25 0 1 0 202974487 2101248 378 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134531376 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 513 378 67 122 0 387 0
Current children cumulated CPU time (s) 12.69
Current children cumulated vsize (KiB) 2052

[startup+25.5017 s]
/proc/loadavg: 0.95 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1601680/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=2284 CPUtime=25.49
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 460 0 0 0 2549 0 0 0 25 0 1 0 202974487 2338816 443 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134519215 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 571 443 67 122 0 445 0
Current children cumulated CPU time (s) 25.49
Current children cumulated vsize (KiB) 2284

[startup+51.1013 s]
/proc/loadavg: 0.96 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1601296/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=2720 CPUtime=51.08
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 562 0 0 0 5108 0 0 0 25 0 1 0 202974487 2785280 545 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134519215 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 680 545 67 122 0 554 0
Current children cumulated CPU time (s) 51.08
Current children cumulated vsize (KiB) 2720

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

[startup+57.5017 s]
/proc/loadavg: 0.97 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1601168/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=2832 CPUtime=57.48
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 576 0 0 0 5748 0 0 0 25 0 1 0 202974487 2899968 559 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134519232 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 708 559 67 122 0 582 0
Current children cumulated CPU time (s) 57.48
Current children cumulated vsize (KiB) 2832

[startup+63.9011 s]
/proc/loadavg: 0.97 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1601104/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=2832 CPUtime=63.88
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 598 0 0 0 6388 0 0 0 25 0 1 0 202974487 2899968 581 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134529751 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 708 581 67 122 0 582 0
Current children cumulated CPU time (s) 63.88
Current children cumulated vsize (KiB) 2832

[startup+67.1053 s]
/proc/loadavg: 0.97 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1601104/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=2936 CPUtime=67.08
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 603 0 0 0 6708 0 0 0 25 0 1 0 202974487 3006464 586 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134519967 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 734 586 67 122 0 608 0
Current children cumulated CPU time (s) 67.08
Current children cumulated vsize (KiB) 2936

[startup+67.9013 s]
/proc/loadavg: 0.97 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1601104/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=2936 CPUtime=67.88
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 607 0 0 0 6788 0 0 0 25 0 1 0 202974487 3006464 590 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134519951 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 734 590 67 122 0 608 0
Current children cumulated CPU time (s) 67.88
Current children cumulated vsize (KiB) 2936

[startup+68.3013 s]
/proc/loadavg: 0.97 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1601040/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=2936 CPUtime=68.28
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 611 0 0 0 6828 0 0 0 25 0 1 0 202974487 3006464 594 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134529588 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 734 594 67 122 0 608 0
Current children cumulated CPU time (s) 68.28
Current children cumulated vsize (KiB) 2936

[startup+68.7024 s]
/proc/loadavg: 0.97 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1601040/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=2936 CPUtime=68.68
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 611 0 0 0 6868 0 0 0 25 0 1 0 202974487 3006464 594 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134530169 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 734 594 67 122 0 608 0
Current children cumulated CPU time (s) 68.68
Current children cumulated vsize (KiB) 2936

[startup+68.8024 s]
/proc/loadavg: 0.97 0.98 0.91 2/78 3175
/proc/meminfo: memFree=1601040/2055920 swapFree=4146612/4192956
[pid=3174] ppid=3172 vsize=2936 CPUtime=68.78
/proc/3174/stat : 3174 (mxc) R 3172 3174 2245 0 -1 4194304 611 0 0 0 6878 0 0 0 25 0 1 0 202974487 3006464 594 18446744073709551615 134512640 135013041 4294956672 18446744073709551615 134530053 0 0 4096 0 0 0 0 17 1 0 0
/proc/3174/statm: 734 594 67 122 0 608 0
Current children cumulated CPU time (s) 68.78
Current children cumulated vsize (KiB) 2936

Child status: 20
Real time (s): 68.8712
CPU time (s): 68.8405
CPU user time (s): 68.8385
CPU system time (s): 0.001999
CPU usage (%): 99.9555
Max. virtual memory (cumulated for all children) (KiB): 2936

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 68.8385
system time used= 0.001999
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 612
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= 8
involuntary context switches= 1418

runsolver used 0.043993 second user time and 0.157975 second system time

The end

Launcher Data (download as text)

Begin job on node29 on Thu Apr 26 01:23:07 UTC 2007

IDJOB= 369996
IDBENCH= 20432
IDSOLVER= 181
FILE ID= node29/369996-1177550587

PBS_JOBID= 4696616

Free space on /tmp= 66488 MiB

SOLVER NAME= MXC 2007-02-08
BENCH NAME= HOME/pub/bench/SAT07/crafted/spence/medium/s77-100.cnf
COMMAND LINE= /tmp/evaluation/369996-1177550587/mxc /tmp/evaluation/369996-1177550587/instance-369996-1177550587.cnf            
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node29/watcher-369996-1177550587 -o ROOT/results/node29/solver-369996-1177550587 -C 5000 -W 7500 -M 1800 --output-limit 1,15  /tmp/evaluation/369996-1177550587/mxc /tmp/evaluation/369996-1177550587/instance-369996-1177550587.cnf            

META MD5SUM SOLVER= d41d8cd98f00b204e9800998ecf8427e
MD5SUM BENCH=  124e32713f66a3b30ead344822177706

RANDOM SEED= 439558487

TIME LIMIT= 5000 seconds
MEMORY LIMIT= 1800 MiB

Linux node29.alineos.net 2.6.9-22.EL.rootsmp #1 SMP Mon Oct 3 08:59:52 CEST 2005 x86_64 x86_64 x86_64 GNU/Linux

/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		: 3000.224
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		: 3000.224
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:       1603888 kB
Buffers:         39684 kB
Cached:         326240 kB
SwapCached:      11748 kB
Active:         247528 kB
Inactive:       155872 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1603888 kB
SwapTotal:     4192956 kB
SwapFree:      4146612 kB
Dirty:             672 kB
Writeback:           0 kB
Mapped:          43900 kB
Slab:            34036 kB
Committed_AS:  2733688 kB
PageTables:       1908 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= 66488 MiB

End job on node29 on Thu Apr 26 01:24:16 UTC 2007