Trace number 422269

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
minisat SAT 2007UNSAT 70.7312 70.7502

General information on the benchmark

Namecrafted/Difficult/contest05/QG/
QG6-dead-dnd001.sat05-2742.reshuffled-07.cnf
MD5SUMb415e752d16c11d39d46562455a8cb4d
Bench CategoryCRAFTED (crafted instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark70.7312
Satisfiable
(Un)Satisfiability was proved
Number of variables1558
Number of clauses8169
Sum of the clauses size71377
Maximum clause length16
Minimum clause length1
Number of clauses of size 133
Number of clauses of size 2290
Number of clauses of size 31413
Number of clauses of size 4183
Number of clauses of size 5234
Number of clauses of size over 56016

Solver Data (download as text)

0.00/0.00	c This is MiniSat 2.0 (Feb 1 2007, SAT-Competition version)
0.00/0.00	c ============================[ Problem Statistics ]=============================
0.00/0.00	c |                                                                             |
0.00/0.00	c |  Number of variables:  1558                                                 |
0.00/0.00	c |  Number of clauses:    8169                                                 |
0.00/0.02	c |  Parsing time:         0.02         s                                       |
0.03/0.07	c ============================[ Search Statistics ]==============================
0.03/0.07	c | Conflicts |          ORIGINAL         |          LEARNT          | Progress |
0.03/0.07	c |           |    Vars  Clauses Literals |    Limit  Clauses Lit/Cl |          |
0.03/0.07	c ===============================================================================
0.03/0.07	c |         0 |    1253     4390    36335 |     1463        0    nan |  0.000 % |
0.03/0.07	c |       100 |    1253     4390    36335 |     1609      100     22 |  2.696 % |
0.03/0.08	c |       250 |    1253     4390    36335 |     1770      250     15 |  2.696 % |
0.03/0.08	c |       475 |    1253     4390    36335 |     1947      475     14 |  2.696 % |
0.03/0.09	c |       815 |    1253     4390    36335 |     2142      815     18 |  2.696 % |
0.09/0.11	c |      1322 |    1253     4390    36335 |     2356     1322     19 |  2.696 % |
0.09/0.13	c |      2084 |    1253     4390    36335 |     2592     2084     22 |  2.696 % |
0.09/0.18	c |      3225 |    1253     4390    36335 |     2851     1863     22 |  2.696 % |
0.19/0.26	c |      4934 |    1253     4390    36335 |     3136     2087     22 |  2.696 % |
0.29/0.38	c |      7498 |    1253     4390    36335 |     3450     3014     23 |  2.696 % |
0.49/0.56	c |     11342 |    1253     4390    36335 |     3795     3257     22 |  2.696 % |
0.89/0.90	c |     17108 |    1253     4390    36335 |     4175     3137     24 |  2.696 % |
1.29/1.33	c |     25757 |    1253     4390    36335 |     4592     3206     21 |  2.696 % |
1.99/2.09	c |     38731 |    1253     4390    36335 |     5051     4419     24 |  2.696 % |
3.09/3.17	c |     58192 |    1253     4390    36335 |     5557     3309     15 |  2.696 % |
4.89/4.90	c |     87384 |    1253     4390    36335 |     6112     4268     17 |  2.696 % |
7.89/7.97	c |    131173 |    1253     4390    36335 |     6723     4488     19 |  2.696 % |
12.19/12.25	c |    196858 |    1253     4390    36335 |     7396     5320     17 |  2.696 % |
19.89/19.96	c |    295385 |    1253     4390    36335 |     8136     6178     20 |  2.696 % |
31.38/31.45	c |    443175 |    1252     3985    32988 |     8949     5466     18 |  2.760 % |
48.78/48.84	c |    664859 |    1250     3559    29148 |     9844     8598     20 |  2.888 % |
70.67/70.74	c ===============================================================================
70.67/70.74	c restarts              : 21
70.67/70.74	c conflicts             : 923504         (13059 /sec)
70.67/70.74	c decisions             : 1506427        (1.92 % random) (21301 /sec)
70.67/70.74	c propagations          : 30324270       (428792 /sec)
70.67/70.74	c conflict literals     : 19527233       (25.46 % deleted)
70.67/70.74	c Memory used           : 4.44 MB
70.67/70.74	c CPU time              : 70.7202 s
70.67/70.74	c 
70.67/70.74	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/node9/watcher-422269-1177552248 -o ROOT/results/node9/solver-422269-1177552248 -C 5000 -W 7500 -M 1800 --output-limit 1,15 /tmp/evaluation/422269-1177552248/minisat_noassertions /tmp/evaluation/422269-1177552248/instance-422269-1177552248.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: 0.99 0.97 0.91 3/77 17716
/proc/meminfo: memFree=1876256/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=1988 CPUtime=0
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 235 0 0 0 0 0 0 0 18 0 1 0 231262348 2035712 221 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134683871 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 497 221 50 130 0 364 0

[startup+0.0380561 s]
/proc/loadavg: 0.99 0.97 0.91 3/77 17716
/proc/meminfo: memFree=1876256/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=2828 CPUtime=0.03
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 450 0 0 0 3 0 0 0 18 0 1 0 231262348 2895872 436 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134526328 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 707 436 62 130 0 574 0
Current children cumulated CPU time (s) 0.03
Current children cumulated vsize (KiB) 2828

[startup+0.101064 s]
/proc/loadavg: 0.99 0.97 0.91 3/77 17716
/proc/meminfo: memFree=1876256/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=2916 CPUtime=0.09
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 495 0 0 0 9 0 0 0 18 0 1 0 231262348 2985984 481 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134551639 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 729 481 67 130 0 596 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 2916

[startup+0.301085 s]
/proc/loadavg: 0.99 0.97 0.91 3/77 17716
/proc/meminfo: memFree=1876256/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=2916 CPUtime=0.29
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 495 0 0 0 29 0 0 0 19 0 1 0 231262348 2985984 481 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546809 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 729 481 67 130 0 596 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 2916

[startup+0.70113 s]
/proc/loadavg: 0.99 0.97 0.91 3/77 17716
/proc/meminfo: memFree=1876256/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=2916 CPUtime=0.69
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 495 0 0 0 69 0 0 0 23 0 1 0 231262348 2985984 481 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134557984 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 729 481 67 130 0 596 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 2916

[startup+1.50122 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1874648/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=2916 CPUtime=1.49
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 496 0 0 0 149 0 0 0 25 0 1 0 231262348 2985984 482 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546839 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 729 482 67 130 0 596 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 2916

[startup+3.1014 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1874328/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=3048 CPUtime=3.09
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 535 0 0 0 309 0 0 0 25 0 1 0 231262348 3121152 521 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546842 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 762 521 67 130 0 629 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 3048

[startup+6.30176 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1874144/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=3460 CPUtime=6.29
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 623 0 0 0 629 0 0 0 25 0 1 0 231262348 3543040 609 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546070 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 865 609 67 130 0 732 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 3460

[startup+12.7015 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1873760/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=3724 CPUtime=12.69
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 697 0 0 0 1269 0 0 0 25 0 1 0 231262348 3813376 683 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134553469 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 931 683 67 130 0 798 0
Current children cumulated CPU time (s) 12.69
Current children cumulated vsize (KiB) 3724

[startup+25.5019 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1873120/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=4140 CPUtime=25.48
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 786 0 0 0 2548 0 0 0 25 0 1 0 231262348 4239360 772 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134548783 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 1035 772 67 130 0 902 0
Current children cumulated CPU time (s) 25.48
Current children cumulated vsize (KiB) 4140

[startup+51.1018 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1872800/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=4404 CPUtime=51.07
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 864 0 0 0 5107 0 0 0 25 0 1 0 231262348 4509696 850 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546870 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 1101 850 67 130 0 968 0
Current children cumulated CPU time (s) 51.07
Current children cumulated vsize (KiB) 4404

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

[startup+63.9013 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1872736/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=4540 CPUtime=63.87
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 892 0 0 0 6387 0 0 0 25 0 1 0 231262348 4648960 878 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546870 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 1135 878 67 130 0 1002 0
Current children cumulated CPU time (s) 63.87
Current children cumulated vsize (KiB) 4540

[startup+67.1056 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1872672/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=4540 CPUtime=67.07
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 899 0 0 0 6707 0 0 0 25 0 1 0 231262348 4648960 885 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546897 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 1135 885 67 130 0 1002 0
Current children cumulated CPU time (s) 67.07
Current children cumulated vsize (KiB) 4540

[startup+68.7018 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1872672/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=4540 CPUtime=68.67
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 904 0 0 0 6867 0 0 0 25 0 1 0 231262348 4648960 890 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134547011 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 1135 890 67 130 0 1002 0
Current children cumulated CPU time (s) 68.67
Current children cumulated vsize (KiB) 4540

[startup+69.5019 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1872672/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=4540 CPUtime=69.47
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 904 0 0 0 6947 0 0 0 25 0 1 0 231262348 4648960 890 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134549060 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 1135 890 67 130 0 1002 0
Current children cumulated CPU time (s) 69.47
Current children cumulated vsize (KiB) 4540

[startup+70.302 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1872608/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=4540 CPUtime=70.27
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 907 0 0 0 7027 0 0 0 25 0 1 0 231262348 4648960 893 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134547143 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 1135 893 67 130 0 1002 0
Current children cumulated CPU time (s) 70.27
Current children cumulated vsize (KiB) 4540

[startup+70.701 s]
/proc/loadavg: 0.99 0.97 0.91 2/78 17717
/proc/meminfo: memFree=1872608/2055920 swapFree=4144404/4192956
[pid=17716] ppid=17714 vsize=4540 CPUtime=70.67
/proc/17716/stat : 17716 (minisat_noasser) R 17714 17716 17047 0 -1 4194304 907 0 0 0 7067 0 0 0 25 0 1 0 231262348 4648960 893 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134547004 0 0 4096 3 0 0 0 17 1 0 0
/proc/17716/statm: 1135 893 67 130 0 1002 0
Current children cumulated CPU time (s) 70.67
Current children cumulated vsize (KiB) 4540

Child status: 20
Real time (s): 70.7502
CPU time (s): 70.7312
CPU user time (s): 70.7202
CPU system time (s): 0.010998
CPU usage (%): 99.9732
Max. virtual memory (cumulated for all children) (KiB): 4540

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 70.7202
system time used= 0.010998
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 913
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= 7
involuntary context switches= 1468

runsolver used 0.052991 second user time and 0.158975 second system time

The end

Launcher Data (download as text)

Begin job on node9 on Thu Apr 26 01:50:48 UTC 2007

IDJOB= 422269
IDBENCH= 24713
IDSOLVER= 189
FILE ID= node9/422269-1177552248

PBS_JOBID= 4696601

Free space on /tmp= 66434 MiB

SOLVER NAME= minisat SAT 2007
BENCH NAME= HOME/pub/bench/SAT07/crafted/Difficult/contest05/QG/QG6-dead-dnd001.sat05-2742.reshuffled-07.cnf
COMMAND LINE= /tmp/evaluation/422269-1177552248/minisat_noassertions /tmp/evaluation/422269-1177552248/instance-422269-1177552248.cnf
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node9/watcher-422269-1177552248 -o ROOT/results/node9/solver-422269-1177552248 -C 5000 -W 7500 -M 1800 --output-limit 1,15  /tmp/evaluation/422269-1177552248/minisat_noassertions /tmp/evaluation/422269-1177552248/instance-422269-1177552248.cnf

META MD5SUM SOLVER= d41d8cd98f00b204e9800998ecf8427e
MD5SUM BENCH=  b415e752d16c11d39d46562455a8cb4d

RANDOM SEED= 796680455

TIME LIMIT= 5000 seconds
MEMORY LIMIT= 1800 MiB

Linux node9.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		: 3000.221
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		: 3000.221
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:       1876728 kB
Buffers:         30916 kB
Cached:          77296 kB
SwapCached:      16432 kB
Active:         100856 kB
Inactive:        34620 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1876728 kB
SwapTotal:     4192956 kB
SwapFree:      4144404 kB
Dirty:            1844 kB
Writeback:           0 kB
Mapped:          33208 kB
Slab:            29276 kB
Committed_AS:  6640256 kB
PageTables:       1788 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= 66434 MiB

End job on node9 on Thu Apr 26 01:51:59 UTC 2007