Trace number 459426

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 NameAnswerObjective functionCPU timeWall clock time
PBS4_v2 2007-03-23OPT3 19.793 19.7998

General information on the benchmark

Namenormalized-PB07/OPT-SMALLINT-NLC/submittedPB07/roussel/factor-mod-B/
factor-mod-size=5-P0=5-P1=11-P2=11-P3=29-P4=29-P5=23-P6=29-P7=17-P8=29-P9=17-B.opb
MD5SUMe959fdee0b143510a2016bc4f8055563
Bench CategoryOPT-SMALLINT-NLC (optimisation, small integers, non linear constraints)
Best result obtained on this benchmarkOPT
Best value of the objective obtained on this benchmark3
Best CPU time to get the best result obtained on this benchmark0.073987
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 3
Optimality of the best value was proved YES
Number of variables135
Total number of constraints19
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)0
Number of constraints which are nor clauses,nor cardinality constraints19
Minimum length of a constraint5
Maximum length of a constraint35
Number of terms in the objective function 5
Biggest coefficient in the objective function 16
Number of bits for the biggest coefficient in the objective function 5
Sum of the numbers in the objective function 31
Number of bits of the sum of numbers in the objective function 5
Biggest number in a constraint 512
Number of bits of the biggest number in a constraint 10
Biggest sum of numbers in a constraint 1984
Number of bits of the biggest sum of numbers11
Number of products (including duplicates)225
Sum of products size (including duplicates)450
Number of different products225
Sum of products size450

Quality of the solution as a function of time


Download the above graph as a PDF file / as an EPS file

Solver Data (download as text)

0.00/0.00	c PBS v4 by Bashar Al-Rawi & Fadi Aloul
0.00/0.00	c Solving /tmp/evaluation/459426-1178654611/instance-459426-1178654611.opb ......
0.19/0.22	c done parsing opb.
0.19/0.22	o 21
1.69/1.70	o 13
8.89/8.97	o 9
8.99/9.05	o 7
10.99/11.02	o 3
19.69/19.79	o 3
19.69/19.79	s OPTIMUM FOUND
19.69/19.79	c Total Run Time					19.785
19.69/19.79	v x1 -x10 x100 x101 -x102 -x103 x104 -x105 x106 x107 -x108 -x109 x11 -x110 x111 -x112 -x113 -x114 -x115 -x116 -x117 -x118 -x119
19.69/19.79	v x12 -x120 x121 -x122 -x123 -x124 -x125 -x126 -x127 -x128 -x129 x13 x130 -x131 -x132 -x133 -x134 -x135 x136 x137 -x138 -x139
19.69/19.79	v x14 -x140 x141 x142 -x143 -x144 -x145 x146 x147 -x148 -x149 x15 -x150 -x151 -x152 -x153 -x154 -x155 -x156 -x157 -x158 -x159
19.69/19.79	v x16 -x160 x161 -x162 x163 -x164 x165 x166 -x167 x168 -x169 x17 x170 x171 -x172 x173 -x174 x175 x176 -x177 x178 -x179 -x18 x180
19.69/19.79	v x181 -x182 x183 -x184 x185 x186 x187 -x188 x189 x19 -x190 x191 x192 -x193 x194 -x195 -x196 -x197 -x198 -x199 x2 x20 -x200 x201
19.69/19.79	v x202 -x203 x204 -x205 x206 x207 -x208 x209 x21 -x210 x211 -x212 -x213 x214 -x215 x216 -x217 -x218 x219 x22 -x220 -x221 -x222
19.69/19.79	v -x223 -x224 -x225 x226 -x227 -x228 x229 -x23 -x230 -x231 -x232 -x233 -x234 -x235 x236 x237 -x238 -x239 x24 -x240 x241 x242
19.69/19.79	v -x243 -x244 -x245 -x246 -x247 -x248 -x249 -x25 -x250 x251 x252 -x253 -x254 -x255 -x256 -x257 -x258 -x259 x26 -x260 x261 -x262
19.69/19.79	v -x263 -x264 -x265 x266 -x267 -x268 -x269 x27 -x270 -x271 -x272 -x273 -x274 -x275 -x276 -x277 -x278 -x279 -x28 -x280 -x281
19.69/19.79	v -x282 -x283 -x284 -x285 x286 x287 -x288 -x289 x29 -x290 -x291 -x292 -x293 -x294 -x295 -x296 -x297 -x298 -x299 -x3 -x30 -x300
19.69/19.79	v -x301 -x302 -x303 -x304 -x305 x306 x307 -x308 -x309 x31 -x310 x311 x312 -x313 -x314 x315 x316 x317 -x318 -x319 x32 x320 -x321
19.69/19.79	v -x322 -x323 -x324 -x325 x326 x327 -x328 -x329 -x33 x330 x331 x332 -x333 -x334 x335 x336 -x337 -x338 -x339 -x34 -x340 x341 -x342
19.69/19.79	v -x343 -x344 -x345 -x346 -x347 -x348 -x349 -x35 -x350 x351 -x352 -x353 -x354 -x355 -x356 -x357 -x358 -x359 x36 -x360 -x37 -x38
19.69/19.79	v -x39 -x4 x40 x41 x42 -x43 x44 x45 x46 x47 -x48 x49 -x5 -x50 x51 -x52 x53 -x54 x55 x56 x57 -x58 x59 x6 -x60 x61 -x62 -x63 x64 -x65 x66
19.69/19.79	v x67 -x68 -x69 x7 -x70 x71 -x72 -x73 -x74 -x75 x76 x77 -x78 -x79 x8 -x80 x81 x82 -x83 -x84 x85 x86 -x87 -x88 -x89 -x9 -x90 -x91 -x92
19.69/19.79	v -x93 -x94 -x95 -x96 -x97 x98 -x99

Verifier Data (download as text)

OK	3

Conversion Script Data (download as text)

Linearizing /tmp/evaluation/459426-1178654611/instance-459426-1178654611.opb

Watcher Data (download as text)

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

command line: runsolver --timestamp -w ROOT/results/node50/watcher-459426-1178654611 -o ROOT/results/node50/solver-459426-1178654611 -C 1800 -W 3600 -M 1800 --output-limit 1,15 PBS4_SAT07v2 /tmp/evaluation/459426-1178654611/instance-459426-1178654611.opb 

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 1800 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 1830 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 3600 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 0.99 0.99 3/64 7250
/proc/meminfo: memFree=1762104/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=1464 CPUtime=0
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 153 0 0 0 0 0 0 0 18 0 1 0 220306278 1499136 135 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 134588758 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 366 135 86 219 0 143 0

[startup+0.0917209 s]
/proc/loadavg: 0.92 0.99 0.99 3/64 7250
/proc/meminfo: memFree=1762104/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=1856 CPUtime=0.08
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 282 0 0 0 8 0 0 0 18 0 1 0 220306278 1900544 264 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 464 264 90 219 0 241 0
Current children cumulated CPU time (s) 0.08
Current children cumulated vsize (KiB) 1856

[startup+0.101721 s]
/proc/loadavg: 0.92 0.99 0.99 3/64 7250
/proc/meminfo: memFree=1762104/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=1856 CPUtime=0.09
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 308 0 0 0 9 0 0 0 18 0 1 0 220306278 1900544 290 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 464 290 90 219 0 241 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 1856

[startup+0.301738 s]
/proc/loadavg: 0.92 0.99 0.99 3/64 7250
/proc/meminfo: memFree=1762104/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=2696 CPUtime=0.29
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 533 0 0 0 29 0 0 0 19 0 1 0 220306278 2760704 515 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 674 515 102 219 0 451 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 2696

[startup+0.701774 s]
/proc/loadavg: 0.92 0.99 0.99 3/64 7250
/proc/meminfo: memFree=1762104/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=4044 CPUtime=0.69
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 802 0 0 0 68 1 0 0 22 0 1 0 220306278 4141056 735 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 1011 735 102 219 0 788 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 4044

[startup+1.50184 s]
/proc/loadavg: 0.92 0.99 0.99 3/65 7251
/proc/meminfo: memFree=1759088/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=6356 CPUtime=1.49
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 1010 0 0 0 147 2 0 0 25 0 1 0 220306278 6508544 943 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 1589 943 102 219 0 1366 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 6356

[startup+3.10198 s]
/proc/loadavg: 0.92 0.99 0.99 2/65 7251
/proc/meminfo: memFree=1757936/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=7136 CPUtime=3.09
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 1406 0 0 0 304 5 0 0 25 0 1 0 220306278 7307264 1242 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 1784 1242 102 219 0 1561 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 7136

[startup+6.30127 s]
/proc/loadavg: 0.93 0.99 0.99 2/65 7251
/proc/meminfo: memFree=1756144/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=7528 CPUtime=6.29
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 1779 0 0 0 621 8 0 0 25 0 1 0 220306278 7708672 1615 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 1882 1615 102 219 0 1659 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 7528

[startup+12.7018 s]
/proc/loadavg: 0.94 0.99 0.99 2/65 7251
/proc/meminfo: memFree=1753776/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=13220 CPUtime=12.68
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 2550 0 0 0 1255 13 0 0 25 0 1 0 220306278 13537280 2193 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 3305 2193 102 219 0 3082 0
Current children cumulated CPU time (s) 12.68
Current children cumulated vsize (KiB) 13220

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

[startup+15.9011 s]
/proc/loadavg: 0.94 0.99 0.99 2/65 7251
/proc/meminfo: memFree=1753008/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=13492 CPUtime=15.89
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 2686 0 0 0 1573 16 0 0 25 0 1 0 220306278 13815808 2329 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 3373 2329 102 219 0 3150 0
Current children cumulated CPU time (s) 15.89
Current children cumulated vsize (KiB) 13492

[startup+17.5013 s]
/proc/loadavg: 0.94 0.99 0.99 2/65 7251
/proc/meminfo: memFree=1752752/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=13624 CPUtime=17.49
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 2740 0 0 0 1732 17 0 0 25 0 1 0 220306278 13950976 2383 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 3406 2383 102 219 0 3183 0
Current children cumulated CPU time (s) 17.49
Current children cumulated vsize (KiB) 13624

[startup+19.1014 s]
/proc/loadavg: 0.94 0.99 0.99 2/65 7251
/proc/meminfo: memFree=1752624/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=13788 CPUtime=19.09
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 2805 0 0 0 1891 18 0 0 25 0 1 0 220306278 14118912 2448 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 3447 2448 102 219 0 3224 0
Current children cumulated CPU time (s) 19.09
Current children cumulated vsize (KiB) 13788

[startup+19.5014 s]
/proc/loadavg: 0.94 0.99 0.99 2/65 7251
/proc/meminfo: memFree=1752624/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=13788 CPUtime=19.49
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 2812 0 0 0 1931 18 0 0 25 0 1 0 220306278 14118912 2455 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 3447 2455 102 219 0 3224 0
Current children cumulated CPU time (s) 19.49
Current children cumulated vsize (KiB) 13788

[startup+19.7014 s]
/proc/loadavg: 0.94 0.99 0.99 2/65 7251
/proc/meminfo: memFree=1752432/2055920 swapFree=4183852/4192956
[pid=7250] ppid=7248 vsize=13788 CPUtime=19.69
/proc/7250/stat : 7250 (PBS4_SAT07v2) R 7248 7250 6569 0 -1 4194304 2814 0 0 0 1951 18 0 0 25 0 1 0 220306278 14118912 2457 18446744073709551615 134512640 135410602 4294956704 18446744073709551615 135059409 0 0 4096 16384 0 0 0 17 1 0 0
/proc/7250/statm: 3447 2457 102 219 0 3224 0
Current children cumulated CPU time (s) 19.69
Current children cumulated vsize (KiB) 13788

Child status: 0
Real time (s): 19.7998
CPU time (s): 19.793
CPU user time (s): 19.605
CPU system time (s): 0.187971
CPU usage (%): 99.9656
Max. virtual memory (cumulated for all children) (KiB): 13788

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 19.605
system time used= 0.187971
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 2830
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= 38

runsolver used 0.009998 second user time and 0.053991 second system time

The end

Launcher Data (download as text)

Begin job on node50 on Tue May  8 20:03:31 UTC 2007

IDJOB= 459426
IDBENCH= 47887
IDSOLVER= 200
FILE ID= node50/459426-1178654611

PBS_JOBID= 5218393

Free space on /tmp= 66562 MiB

SOLVER NAME= PBS4_v2 2007-03-23
BENCH NAME= HOME/pub/bench/PB07/normalized-PB07/OPT-SMALLINT-NLC/submittedPB07/roussel/factor-mod-B/factor-mod-size=5-P0=5-P1=11-P2=11-P3=29-P4=29-P5=23-P6=29-P7=17-P8=29-P9=17-B.opb
COMMAND LINE= PBS4_SAT07v2 /tmp/evaluation/459426-1178654611/instance-459426-1178654611.opb
CONVERSION COMMAND LINE= runsolver -w ROOT/results/node50/convwatcher-459426-1178654611 -o ROOT/results/node50/conversion-459426-1178654611 -C 600 -M 1800 PBconversionToLinear /tmp/evaluation/459426-1178654611/instance-459426-1178654611.opb
CONVERSION RUNSOLVER STATUS CODE= 0
CONVERSION STATUS CODE= 0

RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node50/watcher-459426-1178654611 -o ROOT/results/node50/solver-459426-1178654611 -C 1800 -W 3600 -M 1800 --output-limit 1,15  PBS4_SAT07v2 /tmp/evaluation/459426-1178654611/instance-459426-1178654611.opb

META MD5SUM SOLVER= 18cd8c68a4d3bfb01f29079966475a33
MD5SUM BENCH=  e959fdee0b143510a2016bc4f8055563

RANDOM SEED= 645046907

TIME LIMIT= 1800 seconds
MEMORY LIMIT= 1800 MiB

Linux node50.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:       1762576 kB
Buffers:         26200 kB
Cached:         173408 kB
SwapCached:       3032 kB
Active:          77712 kB
Inactive:       131584 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1762576 kB
SwapTotal:     4192956 kB
SwapFree:      4183852 kB
Dirty:            2272 kB
Writeback:           0 kB
Mapped:          15820 kB
Slab:            70040 kB
Committed_AS:  4939688 kB
PageTables:       1460 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= 66562 MiB

End job on node50 on Tue May  8 20:03:51 UTC 2007