Trace number 315585

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 2007 (with assertions)UNSAT 90.5492 90.5769

General information on the benchmark

Nameindustrial/palacios/uts/
uts-l05-ipc5-h27-unknown.cnf
MD5SUM7634252332633927f116161c1beb6151
Bench CategoryINDUST (industrial instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark21.6907
Satisfiable
(Un)Satisfiability was proved
Number of variables93573
Number of clauses439508
Sum of the clauses size1132510
Maximum clause length403
Minimum clause length1
Number of clauses of size 1190
Number of clauses of size 2347239
Number of clauses of size 388215
Number of clauses of size 41000
Number of clauses of size 5107
Number of clauses of size over 52757

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:  95421                                                |
0.00/0.00	c |  Number of clauses:    439508                                               |
0.69/0.78	c |  Parsing time:         0.73         s                                       |
13.09/13.14	c ============================[ Search Statistics ]==============================
13.09/13.14	c | Conflicts |          ORIGINAL         |          LEARNT          | Progress |
13.09/13.14	c |           |    Vars  Clauses Literals |    Limit  Clauses Lit/Cl |          |
13.09/13.14	c ===============================================================================
13.09/13.14	c |         0 |   25580   303995  1249045 |   101331        0    nan |  0.000 % |
13.19/13.27	c |       102 |   25580   303995  1249045 |   111464      102     14 |  0.029 % |
13.29/13.39	c |       252 |   25580   303995  1249045 |   122611      252     18 |  0.029 % |
13.59/13.66	c |       477 |   25580   303995  1249045 |   134872      477     17 |  0.029 % |
13.89/13.96	c |       814 |   25580   303995  1249045 |   148359      814     18 |  0.029 % |
14.19/14.22	c |      1320 |   25580   303995  1249045 |   163195     1320     17 |  0.029 % |
15.69/15.73	c |      2079 |   25580   303995  1249045 |   179515     2079     16 |  0.029 % |
16.39/16.49	c |      3218 |   25580   303995  1249045 |   197466     3218     16 |  0.029 % |
19.29/19.37	c |      4930 |   25580   303995  1249045 |   217213     4930     16 |  0.029 % |
21.58/21.63	c |      7492 |   25580   303995  1249045 |   238934     7492     18 |  0.029 % |
26.18/26.20	c |     11337 |   25563   303829  1248342 |   262828    11335     18 |  0.047 % |
33.38/33.40	c |     17103 |   25563   303829  1248342 |   289111    17101     19 |  0.047 % |
42.58/42.68	c |     25752 |   25481   303076  1245526 |   318022    25697     19 |  0.133 % |
54.98/55.00	c |     38726 |   25478   302977  1245072 |   349824    38670     17 |  0.136 % |
76.57/76.69	c |     58188 |   25478   302977  1245072 |   384806    58132     16 |  0.136 % |
90.17/90.26	c ===============================================================================
90.17/90.26	c restarts              : 15
90.17/90.26	c conflicts             : 71205          (790 /sec)
90.17/90.26	c decisions             : 105184         (1.78 % random) (1167 /sec)
90.17/90.26	c propagations          : 90446815       (1003345 /sec)
90.17/90.26	c conflict literals     : 1143437        (42.22 % deleted)
90.17/90.26	c Memory used           : 67.69 MB
90.17/90.26	c CPU time              : 90.1453 s
90.17/90.26	c 
90.46/90.56	s UNSATISFIABLE

Verifier Data (download as text)

No possible verification on an UNSAT instance

Watcher Data (download as text)

runsolver version 3.2.1 (c) roussel@cril.univ-artois.fr

command line: runsolver --timestamp -w ROOT/results/node24/watcher-315585-1172656293 -o ROOT/results/node24/solver-315585-1172656293 -C 1200 -W 2400 -M 1800 --output-limit 1,15 /tmp/evaluation/315585-1172656293/minisat /tmp/evaluation/315585-1172656293/instance-315585-1172656293.cnf 

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 1230 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 2400 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 0.99 3/77 13510
/proc/meminfo: memFree=1121552/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=2208 CPUtime=0
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 465 0 0 0 0 0 0 0 18 0 1 0 285583589 2260992 449 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134563635 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 552 449 58 138 0 411 0

[startup+0.0387281 s]
/proc/loadavg: 0.92 0.98 0.99 3/77 13510
/proc/meminfo: memFree=1121552/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=4516 CPUtime=0.03
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 980 0 0 0 3 0 0 0 18 0 1 0 285583589 4624384 964 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134532549 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 1129 964 58 138 0 988 0
Current children cumulated CPU time (s) 0.03
Current children cumulated vsize (KiB) 4516

[startup+0.101734 s]
/proc/loadavg: 0.92 0.98 0.99 3/77 13510
/proc/meminfo: memFree=1121552/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=7536 CPUtime=0.09
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 1738 0 0 0 9 0 0 0 18 0 1 0 285583589 7716864 1722 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134707275 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 1884 1722 58 138 0 1743 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 7536

[startup+0.301755 s]
/proc/loadavg: 0.92 0.98 0.99 3/77 13510
/proc/meminfo: memFree=1121552/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=16152 CPUtime=0.29
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 3747 0 0 0 28 1 0 0 19 0 1 0 285583589 16539648 3731 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134707275 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 4038 3732 58 138 0 3897 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 16152

[startup+0.701798 s]
/proc/loadavg: 0.92 0.98 0.99 3/77 13510
/proc/meminfo: memFree=1121552/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=34156 CPUtime=0.69
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 7960 0 0 0 65 4 0 0 22 0 1 0 285583589 34975744 7944 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134707275 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 8539 7944 58 138 0 8398 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 34156

[startup+1.50189 s]
/proc/loadavg: 0.92 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1085768/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=39372 CPUtime=1.49
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 9007 0 0 0 145 4 0 0 25 0 1 0 285583589 40316928 8991 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134531080 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 9843 8991 72 138 0 9702 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 39372

[startup+3.10206 s]
/proc/loadavg: 0.93 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1079496/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=60368 CPUtime=3.09
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 14060 0 0 0 302 7 0 0 25 0 1 0 285583589 61816832 14044 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134532676 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 15092 14044 72 138 0 14951 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 60368

[startup+6.3014 s]
/proc/loadavg: 0.93 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1052040/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=74184 CPUtime=6.29
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 17659 0 0 0 621 8 0 0 25 0 1 0 285583589 75964416 17643 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134530780 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 18546 17643 72 138 0 18405 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 74184

[startup+12.7011 s]
/proc/loadavg: 0.94 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1047432/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=78076 CPUtime=12.69
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 18689 0 0 0 1260 9 0 0 25 0 1 0 285583589 79949824 18673 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134530601 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 19519 18673 72 138 0 19378 0
Current children cumulated CPU time (s) 12.69
Current children cumulated vsize (KiB) 78076

[startup+25.5015 s]
/proc/loadavg: 0.95 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1054920/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=68944 CPUtime=25.48
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 18809 0 0 0 2539 9 0 0 25 0 1 0 285583589 70598656 16618 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134555832 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 17236 16618 74 138 0 17095 0
Current children cumulated CPU time (s) 25.48
Current children cumulated vsize (KiB) 68944

[startup+51.1013 s]
/proc/loadavg: 0.96 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1054984/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=68944 CPUtime=51.07
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 18809 0 0 0 5098 9 0 0 25 0 1 0 285583589 70598656 16618 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134550635 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 17236 16618 74 138 0 17095 0
Current children cumulated CPU time (s) 51.07
Current children cumulated vsize (KiB) 68944

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

[startup+76.701 s]
/proc/loadavg: 0.97 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1054984/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=69188 CPUtime=76.67
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 18866 0 0 0 7658 9 0 0 25 0 1 0 285583589 70848512 16675 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134551022 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 17297 16675 74 138 0 17156 0
Current children cumulated CPU time (s) 76.67
Current children cumulated vsize (KiB) 69188

[startup+83.1017 s]
/proc/loadavg: 0.98 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1054920/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=69308 CPUtime=83.07
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 18872 0 0 0 8298 9 0 0 25 0 1 0 285583589 70971392 16681 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134550551 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 17327 16681 74 138 0 17186 0
Current children cumulated CPU time (s) 83.07
Current children cumulated vsize (KiB) 69308

[startup+86.3011 s]
/proc/loadavg: 0.98 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1054920/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=69308 CPUtime=86.26
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 18876 0 0 0 8617 9 0 0 25 0 1 0 285583589 70971392 16685 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134550582 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 17327 16685 74 138 0 17186 0
Current children cumulated CPU time (s) 86.26
Current children cumulated vsize (KiB) 69308

[startup+87.9013 s]
/proc/loadavg: 0.98 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1054920/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=69308 CPUtime=87.87
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 18876 0 0 0 8778 9 0 0 25 0 1 0 285583589 70971392 16685 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134550582 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 17327 16685 74 138 0 17186 0
Current children cumulated CPU time (s) 87.87
Current children cumulated vsize (KiB) 69308

[startup+89.5014 s]
/proc/loadavg: 0.98 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1054920/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=69308 CPUtime=89.46
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 18876 0 0 0 8937 9 0 0 25 0 1 0 285583589 70971392 16685 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134550582 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 17327 16685 74 138 0 17186 0
Current children cumulated CPU time (s) 89.46
Current children cumulated vsize (KiB) 69308

[startup+90.3015 s]
/proc/loadavg: 0.98 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1054920/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=69308 CPUtime=90.26
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 18882 0 0 0 9017 9 0 0 25 0 1 0 285583589 70971392 16690 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134703657 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 17327 16690 79 138 0 17186 0
Current children cumulated CPU time (s) 90.26
Current children cumulated vsize (KiB) 69308

[startup+90.5015 s]
/proc/loadavg: 0.98 0.98 0.99 2/78 13511
/proc/meminfo: memFree=1054920/2055920 swapFree=4143948/4192956
[pid=13510] ppid=13508 vsize=66600 CPUtime=90.46
/proc/13510/stat : 13510 (minisat) R 13508 13510 12698 0 -1 4194304 18882 0 0 0 9037 9 0 0 25 0 1 0 285583589 68198400 16223 18446744073709551615 134512640 135078472 4294956640 18446744073709551615 134702392 0 0 4096 3 0 0 0 17 1 0 0
/proc/13510/statm: 16650 16223 79 138 0 16509 0
Current children cumulated CPU time (s) 90.46
Current children cumulated vsize (KiB) 66600

Child status: 0
Real time (s): 90.5769
CPU time (s): 90.5492
CPU user time (s): 90.4393
CPU system time (s): 0.109983
CPU usage (%): 99.9695
Max. virtual memory (cumulated for all children) (KiB): 78620

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 90.4393
system time used= 0.109983
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 18882
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= 179

runsolver used 0.091986 second user time and 0.224965 second system time

The end

Launcher Data (download as text)

Begin job on node24 on Wed Feb 28 09:51:33 UTC 2007

IDJOB= 315585
IDBENCH= 20420
IDSOLVER= 109
FILE ID= node24/315585-1172656293

PBS_JOBID= 3981172

Free space on /tmp= 66527 MiB

SOLVER NAME= minisat SAT 2007
BENCH NAME= HOME/pub/bench/SAT07/industrial/palacios/uts/uts-l05-ipc5-h27-unknown.cnf
COMMAND LINE= /tmp/evaluation/315585-1172656293/minisat /tmp/evaluation/315585-1172656293/instance-315585-1172656293.cnf            
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node24/watcher-315585-1172656293 -o ROOT/results/node24/solver-315585-1172656293 -C 1200 -W 2400 -M 1800 --output-limit 1,15  /tmp/evaluation/315585-1172656293/minisat /tmp/evaluation/315585-1172656293/instance-315585-1172656293.cnf            

META MD5SUM SOLVER= 120abd248b069e44985635f055606c5a
MD5SUM BENCH=  7634252332633927f116161c1beb6151

RANDOM SEED= 528691982

TIME LIMIT= 1200 seconds
MEMORY LIMIT= 1800 MiB

Linux node24.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		: 3000.232
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		: 3000.232
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:       1121960 kB
Buffers:         26224 kB
Cached:         832404 kB
SwapCached:       3748 kB
Active:         107196 kB
Inactive:       760880 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1121960 kB
SwapTotal:     4192956 kB
SwapFree:      4143948 kB
Dirty:            8504 kB
Writeback:           0 kB
Mapped:          15348 kB
Slab:            51484 kB
Committed_AS:   834844 kB
PageTables:       1732 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= 66527 MiB

End job on node24 on Wed Feb 28 09:53:04 UTC 2007