Trace number 240333

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
Abscon 109 ESACSAT 2.69259 2.80222

DiagnosticValue
CHECKS1635312
NODES13956

General information on the benchmark

Nameqcp-qwh/QWH-15/
qwh-15-106-1_ext.xml
MD5SUM7322c53585591128f0e651c01e9887eb
Bench Category2-ARY-EXT (binary constraints in extension)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.181971
SatisfiableYES
(Un)Satisfiability was proved
Number of variables225
Number of constraints3150
Maximum constraint arity2
Maximum domain size15
Number of constraints which are defined in extension3150
Number of constraints which are defined in intension0
Global constraints used (with number of constraints)

Solver Data (download as text)

0.36	   
0.36	Abscon 109 (November, 2006)
0.36	   
0.36	   configuration
0.36	     name=esac.xml
0.39	   
0.39	   instance
0.39	     name=/tmp/evaluation/240333-1168373034/unknown.xml
0.42	   
0.42	   domains being loaded...
0.42	   
0.42	   variables being loaded...
0.48	     nbVariables=225  nbDomainTypes=16  minDomainSize=1  maxDomainSize=15
0.48	       =>  wckTime=0.125  cpuTime=0.1  mem=7M894
0.49	   
0.49	   relations being loaded...
0.49	   
0.49	   constraints being loaded...
0.74	     nbConstraints=2324  nbRelationTypes=17  nbSingletonDomainVariables=119  nbExtensionStructures=31
0.74	     nbSharedExtensionStructures=2293  nbConflictsStructures=31  nbSharedConflictsStructures=2293
0.74	     nbSharedBinaryRepresentations=493  maxDegree=28  maxArity=2
0.74	       =>  wckTime=0.382  cpuTime=0.26  mem=14M737
0.79	   
0.79	   solver IterativeSystematicSolver being built... 
0.96	       =>  wckTime=0.596  cpuTime=0.4  mem=16M549
1.08	   
1.08	   preprocessing
1.08	     nbConstraintChecks=48022  nbPropagations=1702  nbRevisions=14073  nbUselessRevisions=11566  nbSingletonTests=520
1.08	     nbEffectiveSingletonTests=1  nbESACBranches=12  nbRemovedValues=1179  detectedInconsistency=no
1.08	       =>  wckTime=0.121  cpuTime=0.09  mem=16M549
1.12	   
1.12	   search
1.12	     run=0  nbConstraintChecks=3726  nbPropagations=1948  nbRevisions=15406  nbUselessRevisions=12345  nbAssignments=151
1.12	     nbFailedAssignments=4  nbBacktracks=19  nbVisitedNodes=162  nbRestartNogoods=0  mapSize=9  nbInferences=0
1.12	     nbTooLargeKeys=0
1.12	       =>  wckTime=0.156  cpuTime=0.11  mem=16M549
1.14	   
1.14	   search
1.14	     run=1  nbConstraintChecks=8536  nbPropagations=4305  nbRevisions=32593  nbUselessRevisions=25669  nbAssignments=335
1.14	     nbFailedAssignments=19  nbBacktracks=46  nbVisitedNodes=370  nbRestartNogoods=1  mapSize=29  nbInferences=0
1.14	     nbTooLargeKeys=0
1.14	       =>  wckTime=0.177  cpuTime=0.13  mem=16M549
1.16	   
1.16	   search
1.16	     run=2  nbConstraintChecks=14999  nbPropagations=7190  nbRevisions=52594  nbUselessRevisions=40973
1.16	     nbAssignments=545  nbFailedAssignments=28  nbBacktracks=76  nbVisitedNodes=570  nbRestartNogoods=4  mapSize=42
1.16	     nbInferences=0  nbTooLargeKeys=0
1.16	       =>  wckTime=0.198  cpuTime=0.15  mem=16M549
1.18	   
1.18	   search
1.18	     run=3  nbConstraintChecks=19051  nbPropagations=10417  nbRevisions=74162  nbUselessRevisions=57246
1.18	     nbAssignments=744  nbFailedAssignments=38  nbBacktracks=110  nbVisitedNodes=785  nbRestartNogoods=6  mapSize=54
1.18	     nbInferences=0  nbTooLargeKeys=0
1.18	       =>  wckTime=0.221  cpuTime=0.17  mem=16M549
1.21	   
1.21	   search
1.21	     run=4  nbConstraintChecks=27623  nbPropagations=14260  nbRevisions=99696  nbUselessRevisions=76395
1.21	     nbAssignments=1132  nbFailedAssignments=48  nbBacktracks=220  nbVisitedNodes=991  nbRestartNogoods=10  mapSize=69
1.21	     nbInferences=0  nbTooLargeKeys=0
1.21	       =>  wckTime=0.251  cpuTime=0.19  mem=16M549
1.25	   
1.25	   search
1.25	     run=5  nbConstraintChecks=36778  nbPropagations=18894  nbRevisions=128768  nbUselessRevisions=97578
1.25	     nbAssignments=1374  nbFailedAssignments=67  nbBacktracks=307  nbVisitedNodes=1282  nbRestartNogoods=11  mapSize=114
1.25	     nbInferences=0  nbTooLargeKeys=0
1.25	       =>  wckTime=0.286  cpuTime=0.22  mem=16M549
1.28	   
1.28	   search
1.28	     run=6  nbConstraintChecks=48776  nbPropagations=24556  nbRevisions=162232  nbUselessRevisions=121162
1.28	     nbAssignments=1658  nbFailedAssignments=100  nbBacktracks=426  nbVisitedNodes=1628  nbRestartNogoods=13
1.28	     mapSize=172  nbInferences=0  nbTooLargeKeys=0
1.28	       =>  wckTime=0.316  cpuTime=0.24  mem=17M524
1.32	   
1.32	   search
1.32	     run=7  nbConstraintChecks=69138  nbPropagations=31795  nbRevisions=203793  nbUselessRevisions=149696
1.32	     nbAssignments=2016  nbFailedAssignments=147  nbBacktracks=597  nbVisitedNodes=2068  nbRestartNogoods=15
1.32	     mapSize=255  nbInferences=0  nbTooLargeKeys=0
1.32	       =>  wckTime=0.358  cpuTime=0.28  mem=17M524
1.37	   
1.37	   search
1.37	     run=8  nbConstraintChecks=105036  nbPropagations=41862  nbRevisions=260359  nbUselessRevisions=187674
1.37	     nbAssignments=2530  nbFailedAssignments=231  nbBacktracks=854  nbVisitedNodes=2693  nbRestartNogoods=21
1.37	     mapSize=390  nbInferences=1  nbTooLargeKeys=0
1.37	       =>  wckTime=0.412  cpuTime=0.33  mem=17M524
1.44	   
1.44	   search
1.44	     run=9  nbConstraintChecks=145838  nbPropagations=55192  nbRevisions=333838  nbUselessRevisions=236377
1.44	     nbAssignments=3146  nbFailedAssignments=325  nbBacktracks=1238  nbVisitedNodes=3477  nbRestartNogoods=27
1.44	     mapSize=565  nbInferences=1  nbTooLargeKeys=0
1.44	       =>  wckTime=0.48  cpuTime=0.39  mem=17M524
1.55	   
1.55	   search
1.55	     run=10  nbConstraintChecks=227290  nbPropagations=74753  nbRevisions=441330  nbUselessRevisions=306093
1.55	     nbAssignments=4022  nbFailedAssignments=499  nbBacktracks=1819  nbVisitedNodes=4699  nbRestartNogoods=30
1.55	     mapSize=871  nbInferences=1  nbTooLargeKeys=0
1.55	       =>  wckTime=0.585  cpuTime=0.49  mem=17M524
1.61	   
1.61	   INFO : Stopping hyperNogood (mapSize=1024, nbTooLargekeys=0, mem=17M524)
1.63	   
1.63	   search
1.63	     run=11  nbConstraintChecks=283553  nbPropagations=97511  nbRevisions=581543  nbUselessRevisions=402160
1.63	     nbAssignments=5021  nbFailedAssignments=616  nbBacktracks=2690  nbVisitedNodes=5918  nbRestartNogoods=36
1.63	       =>  wckTime=0.674  cpuTime=0.58  mem=17M524
1.76	   
1.76	   search
1.76	     run=12  nbConstraintChecks=390793  nbPropagations=125152  nbRevisions=789971  nbUselessRevisions=556432
1.76	     nbAssignments=6574  nbFailedAssignments=742  nbBacktracks=4068  nbVisitedNodes=7690  nbRestartNogoods=39
1.76	       =>  wckTime=0.796  cpuTime=0.7  mem=17M524
2.06	   
2.06	   search
2.06	     run=13  nbConstraintChecks=750978  nbPropagations=168956  nbRevisions=1234739  nbUselessRevisions=914587
2.06	     nbAssignments=8951  nbFailedAssignments=1093  nbBacktracks=6027  nbVisitedNodes=10724  nbRestartNogoods=47
2.06	       =>  wckTime=1.097  cpuTime=1.0  mem=17M524
2.60	   
2.60	   search
2.60	     run=14  nbConstraintChecks=1400091  nbPropagations=241500  nbRevisions=2114622  nbUselessRevisions=1650115
2.60	     nbAssignments=12671  nbFailedAssignments=1871  nbBacktracks=8947  nbVisitedNodes=15852  nbRestartNogoods=54
2.60	       =>  wckTime=1.641  cpuTime=1.54  mem=17M524
2.77	   
2.77	   search
2.77	     run=15  nbConstraintChecks=1587290  nbPropagations=322168  nbRevisions=3115952  nbUselessRevisions=2490228
2.77	     nbAssignments=13956  nbFailedAssignments=2063  nbBacktracks=9815  nbVisitedNodes=17476  nbRestartNogoods=60
2.77	       =>  wckTime=1.808  cpuTime=1.7  mem=17M524
2.77	   
2.77	   global
2.77	     nbConstraintChecks=1635312  nbPropagations=323870  nbRevisions=3130025  nbUselessRevisions=2501794
2.77	     nbRestartNogoods=60  solvingWckTime=1.809  solvingCpuTime=1.7  expiredTime=no  totalExploration=no
2.77	     nbFoundSolutions=1  globalCpuTime=2.15
2.77	       =>  wckTime=2.41  cpuTime=2.1  mem=17M524
2.77	   
2.77	s SATISFIABLE
2.77	v 8 5 7 6 1 14 10 2 12 0 3 9 4 11 13 14 10 12 11 8 4 13 1 9 2 0 6 7 5 3 3 14 9 12 2 5 0 10 7 11 4 13 1 6 8 2 7 5 3 12 1 11 4 10 8 9 0 13 14 6 6 1 10 5 0 13 12 9 3 7 11 8 2 4 14 4 3 1 14 11 10 6 7 13 12 5 2 8 9 0 0 8 11 9 7 12 4 3 2 1 14 10 6 13 5 13 12 4 7 5 9 2 14 1 3 6 11 0 8 10 11 4 8 2 3 6 5 13 14 9 7 12 10 0 1 1 9 3 4 13 0 8 6 5 10 2 14 12 7 11 10 0 2 13 6 11 7 8 4 14 1 5 3 12 9 7 13 14 1 10 2 9 0 6 5 8 4 11 3 12 12 11 0 10 4 3 14 5 8 6 13 1 9 2 7 5 2 6 8 9 7 1 11 0 13 12 3 14 10 4 9 6 13 0 14 8 3 12 11 4 10 7 5 1 2 
2.77	d NODES 13956
2.77	d CHECKS 1635312
2.77	   
2.77	   totalWckTime=2.486  totalCpuTime=2.15

Verifier Data (download as text)

OK

Watcher Data (download as text)

runsolver version 3.1.3 (c) roussel@cril.univ-artois.fr

command line: runsolver --timestamp -w ROOT/results/node16/watcher-240333-1168373034 -o ROOT/results/node16/solver-240333-1168373034 -C 1800 -M 900 java -Xms756M -Xmx756M -XX:PermSize=10m -XX:MaxPermSize=10m -jar abscon109.jar esac.xml 1 XSax /tmp/evaluation/240333-1168373034/unknown.xml 

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 1800 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 1830 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 921600 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 972800 KiB
Current StackSize limit: 10240 KiB

/proc/loadavg: 0.85 1.52 1.81 4/87 29444
/proc/meminfo: memFree=1726824/2055920 swapFree=4191880/4192956
[pid=29443] ppid=29441 vsize=18540 CPUtime=0
/proc/29443/stat : 29443 (runsolver) R 29441 29443 27943 0 -1 4194368 17 0 0 0 0 0 0 0 20 0 1 0 185698221 18984960 279 18446744073709551615 4194304 4267372 548682068960 18446744073709551615 231962373415 0 2147483391 4096 24578 0 0 0 17 1 0 0
/proc/29443/statm: 4635 279 244 17 0 2626 0

[startup+0.109113 s]
/proc/loadavg: 0.85 1.52 1.81 4/87 29444
/proc/meminfo: memFree=1726824/2055920 swapFree=4191880/4192956
[pid=29443] ppid=29441 vsize=907676 CPUtime=0.04
/proc/29443/stat : 29443 (java) R 29441 29443 27943 0 -1 0 2277 0 1 0 3 1 0 0 16 0 4 0 185698221 929460224 2024 18446744073709551615 134512640 134570532 4294956480 18446744073709551615 4153785378 0 4 0 7368 18446744073709551615 0 0 17 0 0 0
/proc/29443/statm: 226919 2024 1141 14 0 214502 0
Current children cumulated CPU time (s) 0.04
Current children cumulated vsize (KiB) 907676

[startup+0.517034 s]
/proc/loadavg: 0.85 1.52 1.81 4/87 29444
/proc/meminfo: memFree=1726824/2055920 swapFree=4191880/4192956
[pid=29443] ppid=29441 vsize=915328 CPUtime=0.43
/proc/29443/stat : 29443 (java) R 29441 29443 27943 0 -1 0 6300 0 1 0 40 3 0 0 21 0 8 0 185698221 937295872 6039 18446744073709551615 134512640 134570532 4294956480 18446744073709551615 4073448346 0 4 0 23759 18446744073709551615 0 0 17 0 0 0
/proc/29443/statm: 228832 6040 2138 14 0 215302 0
Current children cumulated CPU time (s) 0.43
Current children cumulated vsize (KiB) 915328

[startup+1.33788 s]
/proc/loadavg: 0.94 1.53 1.81 3/94 29451
/proc/meminfo: memFree=1701232/2055920 swapFree=4191880/4192956
[pid=29443] ppid=29441 vsize=915580 CPUtime=1.25
/proc/29443/stat : 29443 (java) R 29441 29443 27943 0 -1 0 9234 0 1 0 118 7 0 0 25 0 8 0 185698221 937553920 8972 18446744073709551615 134512640 134570532 4294956480 18446744073709551615 4073937175 0 4 0 23759 18446744073709551615 0 0 17 0 0 0
/proc/29443/statm: 228895 8972 2524 14 0 215365 0
[pid=29443/tid=29445] ppid=29441 vsize=915580 CPUtime=0.04
/proc/29443/task/29445/stat : 29445 (java) S 29441 29443 27943 0 -1 64 451 0 0 0 4 0 0 0 17 0 8 0 185698231 937553920 8972 18446744073709551615 134512640 134570532 4294956480 18446744073709551615 4294960144 0 0 0 23759 0 0 0 -1 0 0 0
[pid=29443/tid=29446] ppid=29441 vsize=915580 CPUtime=0
/proc/29443/task/29446/stat : 29446 (java) S 29441 29443 27943 0 -1 64 11 0 0 0 0 0 0 0 16 0 8 0 185698231 937553920 8972 18446744073709551615 134512640 134570532 4294956480 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0
[pid=29443/tid=29447] ppid=29441 vsize=915580 CPUtime=0
/proc/29443/task/29447/stat : 29447 (java) S 29441 29443 27943 0 -1 64 5 0 0 0 0 0 0 0 16 0 8 0 185698232 937553920 8972 18446744073709551615 134512640 134570532 4294956480 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0
[pid=29443/tid=29448] ppid=29441 vsize=915580 CPUtime=0
/proc/29443/task/29448/stat : 29448 (java) S 29441 29443 27943 0 -1 64 0 0 0 0 0 0 0 0 18 0 8 0 185698235 937553920 8972 18446744073709551615 134512640 134570532 4294956480 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0
[pid=29443/tid=29449] ppid=29441 vsize=915580 CPUtime=0.26
/proc/29443/task/29449/stat : 29449 (java) S 29441 29443 27943 0 -1 64 422 0 0 0 25 1 0 0 15 0 8 0 185698235 937553920 8972 18446744073709551615 134512640 134570532 4294956480 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0
[pid=29443/tid=29450] ppid=29441 vsize=915580 CPUtime=0
/proc/29443/task/29450/stat : 29450 (java) S 29441 29443 27943 0 -1 64 1 0 0 0 0 0 0 0 19 0 8 0 185698235 937553920 8972 18446744073709551615 134512640 134570532 4294956480 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0
[pid=29443/tid=29451] ppid=29441 vsize=915580 CPUtime=0
/proc/29443/task/29451/stat : 29451 (java) S 29441 29443 27943 0 -1 64 1 0 0 0 0 0 0 0 15 0 8 0 185698235 937553920 8972 18446744073709551615 134512640 134570532 4294956480 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 0 0 0
Current children cumulated CPU time (s) 1.25
Current children cumulated vsize (KiB) 915580

Child status: 0
Real time (s): 2.80222
CPU time (s): 2.69259
CPU user time (s): 2.6086
CPU system time (s): 0.083987
CPU usage (%): 96.0877
Max. virtual memory (cumulated for all children) (KiB): 915580

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 2.6086
system time used= 0.083987
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 9494
page faults= 1
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 1394
involuntary context switches= 1635

runsolver used 0.005999 s user time and 0.019996 s system time

The end

Launcher Data (download as text)

Begin job on node16 on Tue Jan  9 20:03:54 UTC 2007


IDJOB= 240333
IDBENCH= 7122
FILE ID= node16/240333-1168373034

PBS_JOBID= 3522030

Free space on /tmp= 66520 MiB

BENCH NAME= HOME/pub/bench/CPAI06/qcp-qwh/QWH-15/qwh-15-106-1_ext.xml
COMMAND LINE= java -Xms756M -Xmx756M -XX:PermSize=10m -XX:MaxPermSize=10m -jar abscon109.jar esac.xml 1 XSax /tmp/evaluation/240333-1168373034/unknown.xml
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node16/watcher-240333-1168373034 -o ROOT/results/node16/solver-240333-1168373034 -C 1800 -M 900  java -Xms756M -Xmx756M -XX:PermSize=10m -XX:MaxPermSize=10m -jar abscon109.jar esac.xml 1 XSax /tmp/evaluation/240333-1168373034/unknown.xml

META MD5SUM SOLVER= 9b91398c18c9fe54a6c4cfb50dadce08
MD5SUM BENCH=  7322c53585591128f0e651c01e9887eb

RANDOM SEED= 395784126

TIME LIMIT= 1800 seconds

MEMORY LIMIT= 900 MiB


/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		: 3000.220
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		: 3000.220
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:       1727304 kB
Buffers:         53412 kB
Cached:         169452 kB
SwapCached:        448 kB
Active:         188948 kB
Inactive:        87084 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1727304 kB
SwapTotal:     4192956 kB
SwapFree:      4191880 kB
Dirty:            3640 kB
Writeback:           0 kB
Mapped:          72652 kB
Slab:            37396 kB
Committed_AS:  5449620 kB
PageTables:       2340 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= 66520 MiB



End job on node16 on Tue Jan  9 20:03:57 UTC 2007