Trace number 330168

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
KCNFS SMP? (MO) 7 4.36764

General information on the benchmark

Nameindustrial/IBM_FV_2004_30/
IBM_FV_2004_rule_batch_30_SAT_dat.k50.cnf
MD5SUMa98ae53616f0aac946d1660291c4c36b
Bench CategoryINDUST (industrial instances)
Best result obtained on this benchmark
Best CPU time to get the best result obtained on this benchmark
Satisfiable
(Un)Satisfiability was proved
Number of variables102304
Number of clauses424929
Sum of the clauses size1088741
Maximum clause length12
Minimum clause length1
Number of clauses of size 12072
Number of clauses of size 2300970
Number of clauses of size 379606
Number of clauses of size 415114
Number of clauses of size 58599
Number of clauses of size over 518568

Solver Data (download as text)

0.00/0.00	
0.00/0.00	c Computed by /tmp/evaluation/330168-1173158485/kcnfs-smp   V. 1.2
0.00/0.00	c reading file ... done
0.79/0.89	c Input file : '/tmp/evaluation/330168-1173158485/instance-330168-1173158485.cnf'
0.79/0.89	c [#vars: 102304, #clauses: 424929 , (1-12)-CNF]
1.19/1.27	c unit clauses propagate before processing (#clause: 395378)
1.19/1.27	c estimated distribution: 8 tasks
1.49/1.50	c [PID]: 25636 25637 25638 25639 25640 25641 25642

Verifier Data (download as text)

ERROR: Unexpected answer ! (SATISFIABLE/UNSATISFIABLE expected)
Got answer:

Watcher Data (download as text)

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

command line: runsolver --timestamp -w ROOT/results/node17/watcher-330168-1173158485 -o ROOT/results/node17/solver-330168-1173158485 -C 1200 -W 2400 -M 1800 --output-limit 1,15 /tmp/evaluation/330168-1173158485/kcnfs-smp /tmp/evaluation/330168-1173158485/instance-330168-1173158485.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: 0.91 0.95 0.94 2/77 25634
/proc/meminfo: memFree=1824312/2055920 swapFree=4168576/4192956
[pid=25634] ppid=25632 vsize=180784 CPUtime=0
/proc/25634/stat : 25634 (kcnfs-smp) R 25632 25634 23959 0 -1 4194304 66 0 0 0 0 0 0 0 18 0 1 0 335802836 185122816 51 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134841789 0 0 4096 0 0 0 0 17 1 0 0
/proc/25634/statm: 45196 51 43 160 0 45034 0

[startup+0.0643919 s]
/proc/loadavg: 0.91 0.95 0.94 2/77 25634
/proc/meminfo: memFree=1824312/2055920 swapFree=4168576/4192956
[pid=25634] ppid=25632 vsize=180784 CPUtime=0.06
/proc/25634/stat : 25634 (kcnfs-smp) R 25632 25634 23959 0 -1 4194304 66 0 0 0 6 0 0 0 18 0 1 0 335802836 185122816 51 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134841789 0 0 4096 0 0 0 0 17 1 0 0
/proc/25634/statm: 45196 51 43 160 0 45034 0
Current children cumulated CPU time (s) 0.06
Current children cumulated vsize (KiB) 180784

[startup+0.101395 s]
/proc/loadavg: 0.91 0.95 0.94 2/77 25634
/proc/meminfo: memFree=1824312/2055920 swapFree=4168576/4192956
[pid=25634] ppid=25632 vsize=180784 CPUtime=0.09
/proc/25634/stat : 25634 (kcnfs-smp) R 25632 25634 23959 0 -1 4194304 66 0 0 0 9 0 0 0 18 0 1 0 335802836 185122816 51 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134841789 0 0 4096 0 0 0 0 17 1 0 0
/proc/25634/statm: 45196 51 43 160 0 45034 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 180784

[startup+0.301417 s]
/proc/loadavg: 0.91 0.95 0.94 2/77 25634
/proc/meminfo: memFree=1824312/2055920 swapFree=4168576/4192956
[pid=25634] ppid=25632 vsize=187780 CPUtime=0.29
/proc/25634/stat : 25634 (kcnfs-smp) R 25632 25634 23959 0 -1 4194304 1840 0 0 0 29 0 0 0 19 0 1 0 335802836 192286720 1825 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134820679 0 0 4096 0 0 0 0 17 1 0 0
/proc/25634/statm: 46945 1826 48 160 0 46783 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 187780

[startup+0.701457 s]
/proc/loadavg: 0.91 0.95 0.94 2/77 25634
/proc/meminfo: memFree=1824312/2055920 swapFree=4168576/4192956
[pid=25634] ppid=25632 vsize=209692 CPUtime=0.69
/proc/25634/stat : 25634 (kcnfs-smp) R 25632 25634 23959 0 -1 4194304 7305 0 0 0 66 3 0 0 22 0 1 0 335802836 214724608 7290 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134820679 0 0 4096 0 0 0 0 17 1 0 0
/proc/25634/statm: 52423 7291 48 160 0 52261 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 209692

[startup+1.50154 s]
/proc/loadavg: 0.91 0.95 0.94 2/78 25635
/proc/meminfo: memFree=1751344/2055920 swapFree=4168576/4192956
[pid=25634] ppid=25632 vsize=238860 CPUtime=1.49
/proc/25634/stat : 25634 (kcnfs-smp) R 25632 25634 23959 0 -1 4194304 34802 0 0 0 135 14 0 0 25 0 1 0 335802836 244592640 34586 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134836899 0 0 4096 0 0 0 0 17 1 0 0
/proc/25634/statm: 59715 34586 66 160 0 59553 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 238860

[startup+3.10273 s]
/proc/loadavg: 1.08 0.99 0.95 5/81 25638
/proc/meminfo: memFree=1621720/2055920 swapFree=4168576/4192956
[pid=25634] ppid=25632 vsize=238860 CPUtime=2.02
/proc/25634/stat : 25634 (kcnfs-smp) R 25632 25634 23959 0 -1 4194304 55492 0 0 0 170 32 0 0 25 0 1 0 335802836 244592640 34590 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134580328 0 0 4096 0 0 0 0 17 0 0 0
/proc/25634/statm: 59715 34590 66 160 0 59553 0
[pid=25636] ppid=25634 vsize=238860 CPUtime=1.04
/proc/25636/stat : 25636 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5264 0 0 0 103 1 0 0 25 0 1 0 335802986 244592640 34636 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134708968 0 0 4096 2 0 0 0 17 1 0 0
/proc/25636/statm: 59715 34636 66 160 0 59553 0
[pid=25637] ppid=25634 vsize=238860 CPUtime=0.63
/proc/25637/stat : 25637 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5245 0 0 0 61 2 0 0 25 0 1 0 335802993 244592640 34619 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134572267 0 0 4096 0 0 0 0 17 1 0 0
/proc/25637/statm: 59715 34619 66 160 0 59553 0
[pid=25638] ppid=25634 vsize=238860 CPUtime=0.58
/proc/25638/stat : 25638 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5243 0 0 0 56 2 0 0 25 0 1 0 335803021 244592640 34617 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134720296 0 0 4096 2 0 0 0 17 1 0 0
/proc/25638/statm: 59715 34617 66 160 0 59553 0
Current children cumulated CPU time (s) 4.27
Current children cumulated vsize (KiB) 955440



Maximum VSize exceeded: sending SIGTERM then SIGKILL

[startup+4.30285 s]
/proc/loadavg: 1.08 0.99 0.95 9/85 25642
/proc/meminfo: memFree=1536048/2055920 swapFree=4168576/4192956
[pid=25634] ppid=25632 vsize=238860 CPUtime=2.25
/proc/25634/stat : 25634 (kcnfs-smp) R 25632 25634 23959 0 -1 4194304 70275 0 0 0 184 41 0 0 25 0 1 0 335802836 244592640 34590 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134720604 0 0 4096 0 0 0 0 17 0 0 0
/proc/25634/statm: 59715 34590 66 160 0 59553 0
[pid=25636] ppid=25634 vsize=238860 CPUtime=1.44
/proc/25636/stat : 25636 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5286 0 0 0 143 1 0 0 25 0 1 0 335802986 244592640 34658 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134567283 0 0 4096 2 0 0 0 17 1 0 0
/proc/25636/statm: 59715 34658 66 160 0 59553 0
[pid=25637] ppid=25634 vsize=238860 CPUtime=1.03
/proc/25637/stat : 25637 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5265 0 0 0 101 2 0 0 25 0 1 0 335802993 244592640 34639 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134720251 0 0 4096 0 0 0 0 17 1 0 0
/proc/25637/statm: 59715 34639 66 160 0 59553 0
[pid=25638] ppid=25634 vsize=238860 CPUtime=0.98
/proc/25638/stat : 25638 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5263 0 0 0 96 2 0 0 25 0 1 0 335803021 244592640 34637 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134572306 0 0 4096 2 0 0 0 17 1 0 0
/proc/25638/statm: 59715 34637 66 160 0 59553 0
[pid=25639] ppid=25634 vsize=238860 CPUtime=0.63
/proc/25639/stat : 25639 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5243 0 0 0 61 2 0 0 25 0 1 0 335803054 244592640 34620 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134567303 0 0 4096 0 0 0 0 17 1 0 0
/proc/25639/statm: 59715 34620 66 160 0 59553 0
[pid=25640] ppid=25634 vsize=238860 CPUtime=0.39
/proc/25640/stat : 25640 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5233 0 0 0 35 4 0 0 25 0 1 0 335803121 244592640 34601 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134567234 0 0 4096 2 0 0 0 17 0 0 0
/proc/25640/statm: 59715 34601 66 160 0 59553 0
[pid=25641] ppid=25634 vsize=238860 CPUtime=0.25
/proc/25641/stat : 25641 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5227 0 0 0 23 2 0 0 25 0 1 0 335803157 244592640 34598 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134720673 0 0 4096 0 0 0 0 17 0 0 0
/proc/25641/statm: 59715 34598 66 160 0 59553 0
[pid=25642] ppid=25634 vsize=238860 CPUtime=0.03
/proc/25642/stat : 25642 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 550 0 0 0 3 0 0 0 25 0 1 0 335803233 244592640 34590 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134708968 0 0 4096 2 0 0 0 17 0 0 0
/proc/25642/statm: 59715 34590 66 160 0 59553 0
Current children cumulated CPU time (s) 7
Current children cumulated vsize (KiB) 1910880

Sending SIGTERM to process tree (bottom up)
Sleeping 2 seconds

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

[startup+4.30285 s]
/proc/loadavg: 1.08 0.99 0.95 9/85 25642
/proc/meminfo: memFree=1536048/2055920 swapFree=4168576/4192956
[pid=25634] ppid=25632 vsize=238860 CPUtime=2.25
/proc/25634/stat : 25634 (kcnfs-smp) R 25632 25634 23959 0 -1 4194304 70275 0 0 0 184 41 0 0 25 0 1 0 335802836 244592640 34590 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134720604 0 0 4096 0 0 0 0 17 0 0 0
/proc/25634/statm: 59715 34590 66 160 0 59553 0
[pid=25636] ppid=25634 vsize=238860 CPUtime=1.44
/proc/25636/stat : 25636 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5286 0 0 0 143 1 0 0 25 0 1 0 335802986 244592640 34658 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134567283 0 0 4096 2 0 0 0 17 1 0 0
/proc/25636/statm: 59715 34658 66 160 0 59553 0
[pid=25637] ppid=25634 vsize=238860 CPUtime=1.03
/proc/25637/stat : 25637 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5265 0 0 0 101 2 0 0 25 0 1 0 335802993 244592640 34639 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134720251 0 0 4096 0 0 0 0 17 1 0 0
/proc/25637/statm: 59715 34639 66 160 0 59553 0
[pid=25638] ppid=25634 vsize=238860 CPUtime=0.98
/proc/25638/stat : 25638 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5263 0 0 0 96 2 0 0 25 0 1 0 335803021 244592640 34637 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134572306 0 0 4096 2 0 0 0 17 1 0 0
/proc/25638/statm: 59715 34637 66 160 0 59553 0
[pid=25639] ppid=25634 vsize=238860 CPUtime=0.63
/proc/25639/stat : 25639 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5243 0 0 0 61 2 0 0 25 0 1 0 335803054 244592640 34620 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134567303 0 0 4096 0 0 0 0 17 1 0 0
/proc/25639/statm: 59715 34620 66 160 0 59553 0
[pid=25640] ppid=25634 vsize=238860 CPUtime=0.39
/proc/25640/stat : 25640 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5233 0 0 0 35 4 0 0 25 0 1 0 335803121 244592640 34601 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134567234 0 0 4096 2 0 0 0 17 0 0 0
/proc/25640/statm: 59715 34601 66 160 0 59553 0
[pid=25641] ppid=25634 vsize=238860 CPUtime=0.25
/proc/25641/stat : 25641 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 5227 0 0 0 23 2 0 0 25 0 1 0 335803157 244592640 34598 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134720673 0 0 4096 0 0 0 0 17 0 0 0
/proc/25641/statm: 59715 34598 66 160 0 59553 0
[pid=25642] ppid=25634 vsize=238860 CPUtime=0.03
/proc/25642/stat : 25642 (kcnfs-smp) R 25634 25634 23959 0 -1 4194368 550 0 0 0 3 0 0 0 25 0 1 0 335803233 244592640 34590 18446744073709551615 134512640 135172044 4294956704 18446744073709551615 134708968 0 0 4096 2 0 0 0 17 0 0 0
/proc/25642/statm: 59715 34590 66 160 0 59553 0
Current children cumulated CPU time (s) 7
Current children cumulated vsize (KiB) 1910880

Child ended because it received signal 15 (SIGTERM)

!!! problem with CPU time !!!
wait4(...,&childrusage) returns 25634 and gives childrusage.ru_utime.tv_sec=1 childrusage.ru_utime.tv_usec=848718 childrusage.ru_stime.tv_sec=0 childrusage.ru_stime.tv_usec=424935
CPU time returned by wait4() is 2.27365
while last known CPU time is 7

Solver probably didn't/couldn't wait for its children
Using last known CPU time as value...

Real time (s): 4.36764
CPU time (s): 7
CPU user time (s): 6.46
CPU system time (s): 0.54
CPU usage (%): 160.27
Max. virtual memory (cumulated for all children) (KiB): 1910880

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 1.84872
system time used= 0.424935
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 70275
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= 6
involuntary context switches= 53

runsolver used 0.007998 second user time and 0.025996 second system time

The end

Launcher Data (download as text)

Begin job on node17 on Tue Mar  6 05:21:26 UTC 2007

IDJOB= 330168
IDBENCH= 20557
IDSOLVER= 112
FILE ID= node17/330168-1173158485

PBS_JOBID= 4014995

Free space on /tmp= 66507 MiB

SOLVER NAME= KCNFS SMP
BENCH NAME= HOME/pub/bench/SAT07/industrial/IBM_FV_2004_30/IBM_FV_2004_rule_batch_30_SAT_dat.k50.cnf
COMMAND LINE= /tmp/evaluation/330168-1173158485/kcnfs-smp /tmp/evaluation/330168-1173158485/instance-330168-1173158485.cnf            
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node17/watcher-330168-1173158485 -o ROOT/results/node17/solver-330168-1173158485 -C 1200 -W 2400 -M 1800 --output-limit 1,15  /tmp/evaluation/330168-1173158485/kcnfs-smp /tmp/evaluation/330168-1173158485/instance-330168-1173158485.cnf            

META MD5SUM SOLVER= 23f87ccf1c743ff5b6146b444e216cd3
MD5SUM BENCH=  a98ae53616f0aac946d1660291c4c36b

RANDOM SEED= 239287050

TIME LIMIT= 1200 seconds
MEMORY LIMIT= 1800 MiB

Linux node17.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		: 3000.229
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		: 3000.229
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:       1824784 kB
Buffers:         29528 kB
Cached:         124208 kB
SwapCached:       2120 kB
Active:          65392 kB
Inactive:       113972 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1824784 kB
SwapTotal:     4192956 kB
SwapFree:      4168576 kB
Dirty:           12924 kB
Writeback:           0 kB
Mapped:          33496 kB
Slab:            37360 kB
Committed_AS:  1387616 kB
PageTables:       1756 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= 66507 MiB

End job on node17 on Tue Mar  6 05:21:32 UTC 2007