Trace number 422271

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 71.0892 71.1102

General information on the benchmark

Namecrafted/Difficult/contest05/QG/
QG6-gensys-brn007.sat05-2684.reshuffled-07.cnf
MD5SUM749c079607e9e37c206eeb8bd5b8bfaf
Bench CategoryCRAFTED (crafted instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark71.0892
Satisfiable
(Un)Satisfiability was proved
Number of variables1477
Number of clauses7809
Sum of the clauses size65959
Maximum clause length16
Minimum clause length1
Number of clauses of size 133
Number of clauses of size 2289
Number of clauses of size 31172
Number of clauses of size 4124
Number of clauses of size 5894
Number of clauses of size over 55297

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:  1477                                                 |
0.00/0.00	c |  Number of clauses:    7809                                                 |
0.00/0.02	c |  Parsing time:         0.02         s                                       |
0.05/0.06	c ============================[ Search Statistics ]==============================
0.05/0.06	c | Conflicts |          ORIGINAL         |          LEARNT          | Progress |
0.05/0.06	c |           |    Vars  Clauses Literals |    Limit  Clauses Lit/Cl |          |
0.05/0.06	c ===============================================================================
0.05/0.06	c |         0 |    1234     4590    36164 |     1530        0    nan |  0.000 % |
0.05/0.06	c |       100 |    1234     4590    36164 |     1683      100     10 |  2.844 % |
0.05/0.06	c |       250 |    1234     4590    36164 |     1851      250     11 |  2.844 % |
0.05/0.07	c |       475 |    1234     4590    36164 |     2036      475     15 |  2.844 % |
0.05/0.08	c |       812 |    1234     4590    36164 |     2240      812     18 |  2.844 % |
0.05/0.09	c |      1318 |    1234     4590    36164 |     2464     1318     19 |  2.844 % |
0.10/0.12	c |      2079 |    1234     4590    36164 |     2710     2079     20 |  2.844 % |
0.10/0.16	c |      3219 |    1234     4590    36164 |     2981     1791     18 |  2.844 % |
0.20/0.24	c |      4927 |    1234     4590    36164 |     3279     1954     21 |  2.844 % |
0.30/0.38	c |      7489 |    1234     4590    36164 |     3607     2805     26 |  2.844 % |
0.50/0.56	c |     11333 |    1234     4590    36164 |     3968     2939     20 |  2.844 % |
0.79/0.81	c |     17099 |    1234     4590    36164 |     4365     2584     16 |  2.844 % |
1.19/1.26	c |     25749 |    1234     4590    36164 |     4801     2324     14 |  2.844 % |
1.99/2.01	c |     38725 |    1234     4590    36164 |     5281     3020     22 |  2.844 % |
3.20/3.28	c |     58187 |    1234     4590    36164 |     5810     3588     23 |  2.844 % |
5.09/5.14	c |     87379 |    1234     4590    36164 |     6391     3152     21 |  2.844 % |
7.78/7.87	c |    131168 |    1234     4590    36164 |     7030     4814     17 |  2.844 % |
13.09/13.13	c |    196852 |    1234     4590    36164 |     7733     6259     22 |  2.844 % |
20.19/20.24	c |    295378 |    1233     4185    32817 |     8506     7441     20 |  2.912 % |
31.79/31.85	c |    443167 |    1232     3780    29076 |     9357     7397     19 |  2.980 % |
51.28/51.39	c |    664850 |    1230     3754    28976 |    10293     6320     15 |  3.115 % |
71.07/71.10	c ===============================================================================
71.07/71.10	c restarts              : 21
71.07/71.10	c conflicts             : 882469         (12416 /sec)
71.07/71.10	c decisions             : 1791000        (1.93 % random) (25199 /sec)
71.07/71.10	c propagations          : 30559905       (429972 /sec)
71.07/71.10	c conflict literals     : 19167780       (25.13 % deleted)
71.07/71.10	c Memory used           : 4.51 MB
71.07/71.10	c CPU time              : 71.0742 s
71.07/71.10	c 
71.07/71.10	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/node60/watcher-422271-1177552288 -o ROOT/results/node60/solver-422271-1177552288 -C 5000 -W 7500 -M 1800 --output-limit 1,15 /tmp/evaluation/422271-1177552288/minisat_noassertions /tmp/evaluation/422271-1177552288/instance-422271-1177552288.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 3/64 28477
/proc/meminfo: memFree=1736272/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=1988 CPUtime=0
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 227 0 0 0 0 0 0 0 18 0 1 0 203138743 2035712 213 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134683871 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 497 213 50 130 0 364 0

[startup+0.056979 s]
/proc/loadavg: 0.99 0.97 0.91 3/64 28477
/proc/meminfo: memFree=1736272/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=2864 CPUtime=0.05
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 459 0 0 0 5 0 0 0 18 0 1 0 203138743 2932736 445 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134523567 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 716 445 62 130 0 583 0
Current children cumulated CPU time (s) 0.05
Current children cumulated vsize (KiB) 2864

[startup+0.102983 s]
/proc/loadavg: 0.99 0.97 0.91 3/64 28477
/proc/meminfo: memFree=1736272/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=2864 CPUtime=0.1
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 463 0 0 0 10 0 0 0 18 0 1 0 203138743 2932736 449 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546820 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 716 449 66 130 0 583 0
Current children cumulated CPU time (s) 0.1
Current children cumulated vsize (KiB) 2864

[startup+0.303003 s]
/proc/loadavg: 0.99 0.97 0.91 3/64 28477
/proc/meminfo: memFree=1736272/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=2864 CPUtime=0.3
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 463 0 0 0 30 0 0 0 19 0 1 0 203138743 2932736 449 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546842 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 716 449 66 130 0 583 0
Current children cumulated CPU time (s) 0.3
Current children cumulated vsize (KiB) 2864

[startup+0.701041 s]
/proc/loadavg: 0.99 0.97 0.91 3/64 28477
/proc/meminfo: memFree=1736272/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=2864 CPUtime=0.69
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 463 0 0 0 69 0 0 0 22 0 1 0 203138743 2932736 449 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134552479 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 716 449 66 130 0 583 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 2864

[startup+1.50112 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1734728/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=2864 CPUtime=1.49
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 483 0 0 0 149 0 0 0 25 0 1 0 203138743 2932736 469 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134547020 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 716 469 66 130 0 583 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 2864

[startup+3.10128 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1734408/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=3128 CPUtime=3.09
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 543 0 0 0 309 0 0 0 25 0 1 0 203138743 3203072 529 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134547326 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 782 529 66 130 0 649 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 3128

[startup+6.30159 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1734088/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=3260 CPUtime=6.29
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 578 0 0 0 629 0 0 0 25 0 1 0 203138743 3338240 564 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546990 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 815 564 66 130 0 682 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 3260

[startup+12.7012 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1733584/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=3788 CPUtime=12.69
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 703 0 0 0 1268 1 0 0 25 0 1 0 203138743 3878912 689 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134547011 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 947 689 66 130 0 814 0
Current children cumulated CPU time (s) 12.69
Current children cumulated vsize (KiB) 3788

[startup+25.5015 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1733392/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=3952 CPUtime=25.49
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 751 0 0 0 2548 1 0 0 25 0 1 0 203138743 4046848 737 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134547004 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 988 737 66 130 0 855 0
Current children cumulated CPU time (s) 25.49
Current children cumulated vsize (KiB) 3952

[startup+51.102 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1732944/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=4352 CPUtime=51.08
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 848 0 0 0 5107 1 0 0 25 0 1 0 203138743 4456448 834 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546897 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 1088 834 66 130 0 955 0
Current children cumulated CPU time (s) 51.08
Current children cumulated vsize (KiB) 4352

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

[startup+63.9012 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1732752/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=4484 CPUtime=63.87
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 883 0 0 0 6386 1 0 0 25 0 1 0 203138743 4591616 869 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134547143 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 1121 869 66 130 0 988 0
Current children cumulated CPU time (s) 63.87
Current children cumulated vsize (KiB) 4484

[startup+67.1056 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1732752/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=4616 CPUtime=67.08
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 896 0 0 0 6707 1 0 0 25 0 1 0 203138743 4726784 882 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546942 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 1154 882 66 130 0 1021 0
Current children cumulated CPU time (s) 67.08
Current children cumulated vsize (KiB) 4616

[startup+68.7027 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1732688/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=4616 CPUtime=68.67
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 898 0 0 0 6866 1 0 0 25 0 1 0 203138743 4726784 884 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546870 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 1154 884 66 130 0 1021 0
Current children cumulated CPU time (s) 68.67
Current children cumulated vsize (KiB) 4616

[startup+70.3019 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1732688/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=4616 CPUtime=70.28
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 898 0 0 0 7027 1 0 0 25 0 1 0 203138743 4726784 884 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546990 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 1154 884 66 130 0 1021 0
Current children cumulated CPU time (s) 70.28
Current children cumulated vsize (KiB) 4616

[startup+70.7019 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1732688/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=4616 CPUtime=70.67
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 899 0 0 0 7066 1 0 0 25 0 1 0 203138743 4726784 885 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134546983 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 1154 885 66 130 0 1021 0
Current children cumulated CPU time (s) 70.67
Current children cumulated vsize (KiB) 4616

[startup+71.102 s]
/proc/loadavg: 0.99 0.97 0.91 2/65 28478
/proc/meminfo: memFree=1732688/2055920 swapFree=4183288/4192956
[pid=28477] ppid=28475 vsize=4616 CPUtime=71.07
/proc/28477/stat : 28477 (minisat_noasser) R 28475 28477 27843 0 -1 4194304 899 0 0 0 7106 1 0 0 25 0 1 0 203138743 4726784 885 18446744073709551615 134512640 135048876 4294956640 18446744073709551615 134547037 0 0 4096 3 0 0 0 17 1 0 0
/proc/28477/statm: 1154 885 66 130 0 1021 0
Current children cumulated CPU time (s) 71.07
Current children cumulated vsize (KiB) 4616

Child status: 20
Real time (s): 71.1102
CPU time (s): 71.0892
CPU user time (s): 71.0742
CPU system time (s): 0.014997
CPU usage (%): 99.9705
Max. virtual memory (cumulated for all children) (KiB): 4616

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 71.0742
system time used= 0.014997
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 905
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= 117

runsolver used 0.055991 second user time and 0.145977 second system time

The end

Launcher Data (download as text)

Begin job on node60 on Thu Apr 26 01:51:28 UTC 2007

IDJOB= 422271
IDBENCH= 24715
IDSOLVER= 189
FILE ID= node60/422271-1177552288

PBS_JOBID= 4696634

Free space on /tmp= 66451 MiB

SOLVER NAME= minisat SAT 2007
BENCH NAME= HOME/pub/bench/SAT07/crafted/Difficult/contest05/QG/QG6-gensys-brn007.sat05-2684.reshuffled-07.cnf
COMMAND LINE= /tmp/evaluation/422271-1177552288/minisat_noassertions /tmp/evaluation/422271-1177552288/instance-422271-1177552288.cnf
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node60/watcher-422271-1177552288 -o ROOT/results/node60/solver-422271-1177552288 -C 5000 -W 7500 -M 1800 --output-limit 1,15  /tmp/evaluation/422271-1177552288/minisat_noassertions /tmp/evaluation/422271-1177552288/instance-422271-1177552288.cnf

META MD5SUM SOLVER= d41d8cd98f00b204e9800998ecf8427e
MD5SUM BENCH=  749c079607e9e37c206eeb8bd5b8bfaf

RANDOM SEED= 895767341

TIME LIMIT= 5000 seconds
MEMORY LIMIT= 1800 MiB

Linux node60.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		: 3000.214
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		: 3000.214
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:       1736744 kB
Buffers:         21188 kB
Cached:         209496 kB
SwapCached:       3644 kB
Active:         104264 kB
Inactive:       149976 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1736744 kB
SwapTotal:     4192956 kB
SwapFree:      4183288 kB
Dirty:            1792 kB
Writeback:           0 kB
Mapped:          29476 kB
Slab:            50916 kB
Committed_AS:  2590304 kB
PageTables:       1500 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= 66451 MiB

End job on node60 on Thu Apr 26 01:52:39 UTC 2007