Trace number 203404

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
galacJ beta 1SAT 8.60569 8.75078

General information on the benchmark

Namefrb/frb30-15/
frb30-15-2-mgd_ext.xml
MD5SUM13e45cd186aa935a18d72fcefab3e594
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 benchmark0.117981
SatisfiableYES
(Un)Satisfiability was provedYES
Number of variables30
Number of constraints217
Maximum constraint arity2
Maximum domain size15
Number of constraints which are defined in extension217
Number of constraints which are defined in intension0
Global constraints used (with number of constraints)

Solver Data (download as text)

0.03	rm: No match.
0.03	c --- Preproc Stats ---
0.03	c benchs : unknown.xml
0.84	c start processing
0.84	c start relation processing
0.85	c start cnf exporting
0.92	c parsing time : 0.678
0.92	c preprocessing time : 0.751
0.92	
0.92	c Nary constraints - conflicts : 0 supports : 0
0.92	c Binary constraints - conflicts : 204 supports :13
0.92	c max arity constraint : 2
0.92	c Max Tuples generated 0
0.92	c relations : 217
0.92	c relations BDD: 0
0.92	c vars : 451 - clauses :  16595
0.92	
0.96	c Start Sat4J solver
0.96	
7.92	s SATISFIABLE
7.94	c {propagations=1388153, learnedliterals=1, changedreason=0, reduceddb=0, starts=12, learnedbinaryclauses=28, learnedclauses=15039, reducedliterals=448686, learnedternaryclauses=102, conflicts=20329, serialVersionUID=1, inspects=30358513, rootSimplifications=0, decisions=27726}
8.75	v  6 14 11 3 0 9 7 9 10 2 9 8 6 13 0 14 8 2 4 5 4 11 4 0 2 14 0 11 12 7

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/node10/watcher-203404-1168159700 -o ROOT/results/node10/solver-203404-1168159700 -C 1800 -M 900 /tmp/evaluation/203404-1168159700/galacJ.sh /tmp/evaluation/203404-1168159700/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: 1.55 1.84 1.94 5/94 27347
/proc/meminfo: memFree=1459416/2055920 swapFree=4178216/4192956
[pid=27346] ppid=27344 vsize=18540 CPUtime=0
/proc/27346/stat : 27346 (runsolver) R 27344 27346 26979 0 -1 4194368 16 0 0 0 0 0 0 0 20 0 1 0 164365242 18984960 279 18446744073709551615 4194304 4267372 548682069072 18446744073709551615 214919867687 0 0 4096 24578 0 0 0 17 1 0 0
/proc/27346/statm: 4635 279 244 17 0 2626 0

[startup+0.110065 s]
/proc/loadavg: 1.55 1.84 1.94 5/94 27347
/proc/meminfo: memFree=1459416/2055920 swapFree=4178216/4192956
[pid=27346] ppid=27344 vsize=47572 CPUtime=0.01
/proc/27346/stat : 27346 (galacJ.sh) S 27344 27346 26979 0 -1 4194304 796 1728 0 0 0 0 0 1 24 0 1 0 164365242 48713728 362 18446744073709551615 4194304 4520092 548682069328 18446744073709551615 214919474010 0 2 4096 73728 18446744071563181037 0 0 17 1 0 0
/proc/27346/statm: 11893 362 245 79 0 217 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 47572

[startup+0.518119 s]
/proc/loadavg: 1.55 1.84 1.94 5/94 27347
/proc/meminfo: memFree=1459416/2055920 swapFree=4178216/4192956
[pid=27346] ppid=27344 vsize=47572 CPUtime=0.01
/proc/27346/stat : 27346 (galacJ.sh) S 27344 27346 26979 0 -1 4194304 796 1728 0 0 0 0 0 1 24 0 1 0 164365242 48713728 362 18446744073709551615 4194304 4520092 548682069328 18446744073709551615 214919474010 0 2 4096 73728 18446744071563181037 0 0 17 1 0 0
/proc/27346/statm: 11893 362 245 79 0 217 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 47572

[startup+1.34023 s]
/proc/loadavg: 1.55 1.84 1.94 3/103 27369
/proc/meminfo: memFree=1415376/2055920 swapFree=4178216/4192956
[pid=27346] ppid=27344 vsize=47572 CPUtime=0.01
/proc/27346/stat : 27346 (galacJ.sh) S 27344 27346 26979 0 -1 4194304 796 1728 0 0 0 0 0 1 24 0 1 0 164365242 48713728 362 18446744073709551615 4194304 4520092 548682069328 18446744073709551615 214919474010 0 2 4096 73728 18446744071563181037 0 0 17 1 0 0
/proc/27346/statm: 11893 362 245 79 0 217 0
[pid=27361] ppid=27346 vsize=862724 CPUtime=1.27
/proc/27361/stat : 27361 (java) R 27346 27346 26979 0 -1 0 13061 0 1 0 119 8 0 0 25 0 9 0 164365246 883429376 12815 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4074038822 0 4 0 23759 18446744073709551615 0 0 17 1 0 0
/proc/27361/statm: 215681 12815 2027 14 0 201586 0
[pid=27361/tid=27362] ppid=27346 vsize=862724 CPUtime=0.03
/proc/27361/task/27362/stat : 27362 (java) S 27346 27346 26979 0 -1 64 371 0 0 0 3 0 0 0 16 0 9 0 164365249 883429376 12815 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 0 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27363] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27363/stat : 27363 (java) S 27346 27346 26979 0 -1 64 11 0 0 0 0 0 0 0 17 0 9 0 164365250 883429376 12815 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27364] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27364/stat : 27364 (java) S 27346 27346 26979 0 -1 64 7 0 0 0 0 0 0 0 16 0 9 0 164365250 883429376 12815 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27365] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27365/stat : 27365 (java) S 27346 27346 26979 0 -1 64 0 0 0 0 0 0 0 0 18 0 9 0 164365253 883429376 12815 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27366] ppid=27346 vsize=862724 CPUtime=0.27
/proc/27361/task/27366/stat : 27366 (java) S 27346 27346 26979 0 -1 64 962 0 0 0 26 1 0 0 16 0 9 0 164365253 883429376 12815 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27367] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27367/stat : 27367 (java) S 27346 27346 26979 0 -1 64 1 0 0 0 0 0 0 0 19 0 9 0 164365253 883429376 12815 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27368] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27368/stat : 27368 (java) S 27346 27346 26979 0 -1 64 1 0 0 0 0 0 0 0 15 0 9 0 164365253 883429376 12815 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27369] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27369/stat : 27369 (java) S 27346 27346 26979 0 -1 64 5 0 0 0 0 0 0 0 25 0 9 0 164365339 883429376 12815 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
Current children cumulated CPU time (s) 1.28
Current children cumulated vsize (KiB) 910296

[startup+2.98345 s]
/proc/loadavg: 1.55 1.84 1.94 3/103 27369
/proc/meminfo: memFree=1415312/2055920 swapFree=4178216/4192956
[pid=27346] ppid=27344 vsize=47572 CPUtime=0.01
/proc/27346/stat : 27346 (galacJ.sh) S 27344 27346 26979 0 -1 4194304 796 1728 0 0 0 0 0 1 24 0 1 0 164365242 48713728 362 18446744073709551615 4194304 4520092 548682069328 18446744073709551615 214919474010 0 2 4096 73728 18446744071563181037 0 0 17 1 0 0
/proc/27346/statm: 11893 362 245 79 0 217 0
[pid=27361] ppid=27346 vsize=862724 CPUtime=2.9
/proc/27361/stat : 27361 (java) R 27346 27346 26979 0 -1 0 13063 0 1 0 282 8 0 0 25 0 9 0 164365246 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4074038284 0 4 0 23759 18446744073709551615 0 0 17 1 0 0
/proc/27361/statm: 215681 12816 2027 14 0 201586 0
[pid=27361/tid=27362] ppid=27346 vsize=862724 CPUtime=0.03
/proc/27361/task/27362/stat : 27362 (java) S 27346 27346 26979 0 -1 64 371 0 0 0 3 0 0 0 16 0 9 0 164365249 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 0 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27363] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27363/stat : 27363 (java) S 27346 27346 26979 0 -1 64 11 0 0 0 0 0 0 0 17 0 9 0 164365250 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27364] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27364/stat : 27364 (java) S 27346 27346 26979 0 -1 64 7 0 0 0 0 0 0 0 16 0 9 0 164365250 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27365] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27365/stat : 27365 (java) S 27346 27346 26979 0 -1 64 0 0 0 0 0 0 0 0 18 0 9 0 164365253 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27366] ppid=27346 vsize=862724 CPUtime=0.27
/proc/27361/task/27366/stat : 27366 (java) S 27346 27346 26979 0 -1 64 963 0 0 0 26 1 0 0 15 0 9 0 164365253 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27367] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27367/stat : 27367 (java) S 27346 27346 26979 0 -1 64 1 0 0 0 0 0 0 0 19 0 9 0 164365253 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27368] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27368/stat : 27368 (java) S 27346 27346 26979 0 -1 64 1 0 0 0 0 0 0 0 15 0 9 0 164365253 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27369] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27369/stat : 27369 (java) S 27346 27346 26979 0 -1 64 5 0 0 0 0 0 0 0 25 0 9 0 164365339 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
Current children cumulated CPU time (s) 2.91
Current children cumulated vsize (KiB) 910296

[startup+6.19189 s]
/proc/loadavg: 1.59 1.84 1.94 3/103 27369
/proc/meminfo: memFree=1415248/2055920 swapFree=4178216/4192956
[pid=27346] ppid=27344 vsize=47572 CPUtime=0.01
/proc/27346/stat : 27346 (galacJ.sh) S 27344 27346 26979 0 -1 4194304 796 1728 0 0 0 0 0 1 24 0 1 0 164365242 48713728 362 18446744073709551615 4194304 4520092 548682069328 18446744073709551615 214919474010 0 2 4096 73728 18446744071563181037 0 0 17 1 0 0
/proc/27346/statm: 11893 362 245 79 0 217 0
[pid=27361] ppid=27346 vsize=862724 CPUtime=6.08
/proc/27361/stat : 27361 (java) R 27346 27346 26979 0 -1 0 13063 0 1 0 600 8 0 0 25 0 9 0 164365246 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4074043486 0 4 0 23759 18446744073709551615 0 0 17 1 0 0
/proc/27361/statm: 215681 12816 2027 14 0 201586 0
[pid=27361/tid=27362] ppid=27346 vsize=862724 CPUtime=0.03
/proc/27361/task/27362/stat : 27362 (java) S 27346 27346 26979 0 -1 64 371 0 0 0 3 0 0 0 16 0 9 0 164365249 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 0 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27363] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27363/stat : 27363 (java) S 27346 27346 26979 0 -1 64 11 0 0 0 0 0 0 0 17 0 9 0 164365250 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27364] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27364/stat : 27364 (java) S 27346 27346 26979 0 -1 64 7 0 0 0 0 0 0 0 16 0 9 0 164365250 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27365] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27365/stat : 27365 (java) S 27346 27346 26979 0 -1 64 0 0 0 0 0 0 0 0 18 0 9 0 164365253 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27366] ppid=27346 vsize=862724 CPUtime=0.27
/proc/27361/task/27366/stat : 27366 (java) S 27346 27346 26979 0 -1 64 963 0 0 0 26 1 0 0 15 0 9 0 164365253 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27367] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27367/stat : 27367 (java) S 27346 27346 26979 0 -1 64 1 0 0 0 0 0 0 0 19 0 9 0 164365253 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27368] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27368/stat : 27368 (java) S 27346 27346 26979 0 -1 64 1 0 0 0 0 0 0 0 15 0 9 0 164365253 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
[pid=27361/tid=27369] ppid=27346 vsize=862724 CPUtime=0
/proc/27361/task/27369/stat : 27369 (java) S 27346 27346 26979 0 -1 64 5 0 0 0 0 0 0 0 25 0 9 0 164365339 883429376 12816 18446744073709551615 134512640 134570532 4294956048 18446744073709551615 4294960144 0 4 0 23759 0 0 0 -1 1 0 0
Current children cumulated CPU time (s) 6.09
Current children cumulated vsize (KiB) 910296

Child status: 0
Real time (s): 8.75078
CPU time (s): 8.60569
CPU user time (s): 8.43072
CPU system time (s): 0.174973
CPU usage (%): 98.342
Max. virtual memory (cumulated for all children) (KiB): 910296

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 8.43072
system time used= 0.174973
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 24373
page faults= 2
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 1791
involuntary context switches= 1860

runsolver used 0.013997 s user time and 0.030995 s system time

The end

Launcher Data (download as text)

Begin job on node10 on Sun Jan  7 08:48:21 UTC 2007


IDJOB= 203404
IDBENCH= 3961
FILE ID= node10/203404-1168159700

PBS_JOBID= 3478286

Free space on /tmp= 66368 MiB

BENCH NAME= HOME/pub/bench/CPAI06/frb/frb30-15/frb30-15-2-mgd_ext.xml
COMMAND LINE= /tmp/evaluation/203404-1168159700/galacJ.sh /tmp/evaluation/203404-1168159700/unknown.xml
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node10/watcher-203404-1168159700 -o ROOT/results/node10/solver-203404-1168159700 -C 1800 -M 900  /tmp/evaluation/203404-1168159700/galacJ.sh /tmp/evaluation/203404-1168159700/unknown.xml

META MD5SUM SOLVER= ffd78bd56f274e94bd0d0faf76d262cb
MD5SUM BENCH=  13e45cd186aa935a18d72fcefab3e594

RANDOM SEED= 636235556

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		: 3000.232
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:       1459832 kB
Buffers:         54216 kB
Cached:         358360 kB
SwapCached:       2088 kB
Active:         184456 kB
Inactive:       327104 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1459832 kB
SwapTotal:     4192956 kB
SwapFree:      4178216 kB
Dirty:            3792 kB
Writeback:           0 kB
Mapped:         116092 kB
Slab:            69148 kB
Committed_AS:  4068756 kB
PageTables:       2420 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= 66368 MiB



End job on node10 on Sun Jan  7 08:48:31 UTC 2007