Trace number 460542

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
aigsat-wc 2007-05-15UNSAT 191.53 191.665

General information on the benchmark

Nameindustrial-aig/babic/
hsatv17/hsat_vc11817.aig
MD5SUM347b3fcbab5c5ce736d37ab277cb2ec1
Bench CategoryALL (all instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark9.01163
SatisfiableNO
(Un)Satisfiability was proved

Solver Data (download as text)

21.67/21.70	c file: /tmp/evaluation/460542-1179250250/instance-460542-1179250250.aig
21.67/21.70	c Reading aig format..
21.67/21.70	c MAXVAR  714767
21.67/21.70	c INPUTS  82613
21.67/21.70	c LATCHES 0
21.67/21.70	c OUTPUTS 1
21.67/21.70	c AND     632154
21.67/21.70	c Before initialization time 21.0038
21.67/21.70	c Memory used (in MB): 509.344
191.36/191.57	c Using component size threshold as 14
191.36/191.57	
191.36/191.57	s UNSATISFIABLE
191.36/191.57	c Total time (in seconds): 190.631
191.36/191.57	c Memory used (in MB): 586.707
191.36/191.57	c Conflict literals deleted: [15.9131%] Max learned #lits [893197] Reduced #lits [751062]

Verifier Data (download as text)

No verification made

Watcher Data (download as text)

runsolver version 3.2.4 (c) roussel@cril.univ-artois.fr

command line: runsolver --timestamp -w ROOT/results/node3/watcher-460542-1179250250 -o ROOT/results/node3/solver-460542-1179250250 -C 1200 -W 1800 -M 1800 --output-limit 1,15 -S 1 /tmp/evaluation/460542-1179250250/aigsat-wc /tmp/evaluation/460542-1179250250/instance-460542-1179250250.aig 

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): 1800 seconds
Enforcing Stack size limit: 1048576 KiB
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: 1048576 KiB


[startup+0 s]
/proc/loadavg: 0.92 0.98 0.92 3/77 17995
/proc/meminfo: memFree=1602336/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=6908 CPUtime=0
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 494 249 0 0 0 0 0 0 19 0 1 0 401062810 7073792 473 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 135242916 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 1727 483 124 293 0 1428 0

[startup+0.042546 s]
/proc/loadavg: 0.92 0.98 0.92 3/77 17995
/proc/meminfo: memFree=1602336/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=15292 CPUtime=0.03
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 3655 249 0 0 2 1 0 0 19 0 1 0 401062810 15659008 3634 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 135276893 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 3823 3634 125 293 0 3524 0
Current children cumulated CPU time (s) 0.03
Current children cumulated vsize (KiB) 15292

[startup+0.101555 s]
/proc/loadavg: 0.92 0.98 0.92 3/77 17995
/proc/meminfo: memFree=1602336/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=15292 CPUtime=0.09
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 3655 249 0 0 8 1 0 0 19 0 1 0 401062810 15659008 3634 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 135276893 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 3823 3634 125 293 0 3524 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 15292

[startup+0.301588 s]
/proc/loadavg: 0.92 0.98 0.92 3/77 17995
/proc/meminfo: memFree=1602336/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=20476 CPUtime=0.29
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 4936 249 0 0 27 2 0 0 20 0 1 0 401062810 20967424 4914 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 135023903 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 5119 4914 136 293 0 4820 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 20476

[startup+0.701654 s]
/proc/loadavg: 0.92 0.98 0.92 3/77 17995
/proc/meminfo: memFree=1602336/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=39696 CPUtime=0.69
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 10130 249 0 0 65 4 0 0 25 0 1 0 401062810 40648704 9724 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 135023903 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 9924 9725 136 293 0 9625 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 39696

[startup+1.50178 s]
/proc/loadavg: 0.92 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1549144/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=86176 CPUtime=1.49
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 21405 249 0 0 141 8 0 0 25 0 1 0 401062810 88244224 20614 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134590471 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 21544 20614 136 293 0 21245 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 86176

[startup+3.10105 s]
/proc/loadavg: 0.92 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1496088/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=127316 CPUtime=3.08
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 35642 249 0 0 295 13 0 0 25 0 1 0 401062810 130371584 30589 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 135023903 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 31829 30589 136 293 0 31530 0
Current children cumulated CPU time (s) 3.08
Current children cumulated vsize (KiB) 127316

[startup+6.30156 s]
/proc/loadavg: 0.93 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1405080/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=202804 CPUtime=6.29
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 55169 249 0 0 607 22 0 0 25 0 1 0 401062810 207671296 49415 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134576902 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 50701 49415 137 293 0 50402 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 202804

[startup+12.7016 s]
/proc/loadavg: 0.93 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1234584/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=388860 CPUtime=12.68
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 109128 249 0 0 1227 41 0 0 25 0 1 0 401062810 398192640 93825 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134640063 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 97215 93825 142 293 0 96916 0
Current children cumulated CPU time (s) 12.68
Current children cumulated vsize (KiB) 388860

[startup+25.5017 s]
/proc/loadavg: 0.95 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1055704/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=579416 CPUtime=25.47
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 193429 249 0 0 2472 75 0 0 25 0 1 0 401062810 593321984 136482 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134731542 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 144854 136482 160 293 0 144555 0
Current children cumulated CPU time (s) 25.47
Current children cumulated vsize (KiB) 579416

[startup+51.1018 s]
/proc/loadavg: 0.96 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1050392/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=584428 CPUtime=51.05
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 194761 249 0 0 5029 76 0 0 25 0 1 0 401062810 598454272 137814 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 135023903 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 146107 137814 160 293 0 145808 0
Current children cumulated CPU time (s) 51.05
Current children cumulated vsize (KiB) 584428

[startup+102.305 s]
/proc/loadavg: 0.98 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1041432/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=592856 CPUtime=102.21
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 197055 249 0 0 10143 78 0 0 25 0 1 0 401062810 607084544 140009 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134745204 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 148214 140009 160 293 0 147915 0
Current children cumulated CPU time (s) 102.21
Current children cumulated vsize (KiB) 592856

[startup+162.302 s]
/proc/loadavg: 0.99 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1036504/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=597272 CPUtime=162.18
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 198375 249 0 0 16139 79 0 0 25 0 1 0 401062810 611606528 141264 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134744104 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 149318 141264 160 293 0 149019 0
Current children cumulated CPU time (s) 162.18
Current children cumulated vsize (KiB) 597272

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

[startup+166.301 s]
/proc/loadavg: 0.99 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1035608/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=597920 CPUtime=166.17
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 198566 249 0 0 16537 80 0 0 25 0 1 0 401062810 612270080 141455 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134756164 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 149480 141455 160 293 0 149181 0
Current children cumulated CPU time (s) 166.17
Current children cumulated vsize (KiB) 597920

[startup+179.102 s]
/proc/loadavg: 0.99 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1034776/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=598616 CPUtime=178.97
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 198804 249 0 0 17817 80 0 0 25 0 1 0 401062810 612982784 141693 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134744358 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 149654 141693 160 293 0 149355 0
Current children cumulated CPU time (s) 178.97
Current children cumulated vsize (KiB) 598616

[startup+185.502 s]
/proc/loadavg: 0.99 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1034328/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=599308 CPUtime=185.36
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 199004 249 0 0 18456 80 0 0 25 0 1 0 401062810 613691392 141893 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134744761 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 149827 141893 160 293 0 149528 0
Current children cumulated CPU time (s) 185.36
Current children cumulated vsize (KiB) 599308

[startup+188.701 s]
/proc/loadavg: 0.99 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1032920/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=600460 CPUtime=188.57
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 199281 249 0 0 18776 81 0 0 25 0 1 0 401062810 614871040 142170 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134731130 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 150115 142170 160 293 0 149816 0
Current children cumulated CPU time (s) 188.57
Current children cumulated vsize (KiB) 600460

[startup+190.306 s]
/proc/loadavg: 0.99 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1032472/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=600688 CPUtime=190.17
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 199349 249 0 0 18936 81 0 0 25 0 1 0 401062810 615104512 142238 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134725854 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 150172 142238 160 293 0 149873 0
Current children cumulated CPU time (s) 190.17
Current children cumulated vsize (KiB) 600688

[startup+191.102 s]
/proc/loadavg: 0.99 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1032472/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=600760 CPUtime=190.96
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 199377 249 0 0 19015 81 0 0 25 0 1 0 401062810 615178240 142266 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134726003 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 150190 142266 160 293 0 149891 0
Current children cumulated CPU time (s) 190.96
Current children cumulated vsize (KiB) 600760

[startup+191.502 s]
/proc/loadavg: 0.99 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1032344/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=600768 CPUtime=191.36
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 0 199383 249 0 0 19055 81 0 0 25 0 1 0 401062810 615186432 142272 18446744073709551615 134512640 135716322 4294956592 18446744073709551615 134739251 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 150192 142272 160 293 0 149893 0
Current children cumulated CPU time (s) 191.36
Current children cumulated vsize (KiB) 600768

[startup+191.602 s]
/proc/loadavg: 0.99 0.98 0.92 2/78 17997
/proc/meminfo: memFree=1032344/2055920 swapFree=4138692/4192956
[pid=17995] ppid=17993 vsize=0 CPUtime=191.46
/proc/17995/stat : 17995 (aigsat-wc) R 17993 17995 17342 0 -1 4 199389 249 0 0 19063 83 0 0 25 0 1 0 401062810 0 0 18446744073709551615 0 0 0 0 0 0 0 4096 35 0 0 0 17 0 0 0
/proc/17995/statm: 0 0 0 0 0 0 0
Current children cumulated CPU time (s) 191.46
Current children cumulated vsize (KiB) 0

Child status: 20
Real time (s): 191.665
CPU time (s): 191.53
CPU user time (s): 190.632
CPU system time (s): 0.897863
CPU usage (%): 99.9296
Max. virtual memory (cumulated for all children) (KiB): 600768

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 190.632
system time used= 0.897863
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 199638
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= 13
involuntary context switches= 4338

runsolver used 0.213967 second user time and 0.487925 second system time

The end

Launcher Data (download as text)

Begin job on node3 on Tue May 15 17:30:51 UTC 2007

IDJOB= 460542
IDBENCH= 48480
IDSOLVER= 202
FILE ID= node3/460542-1179250250

PBS_JOBID= 5276818

Free space on /tmp= 66540 MiB

SOLVER NAME= aigsat-wc 2007-05-15
BENCH NAME= HOME/pub/bench/AIG07/industrial-aig/babic/hsatv17/hsat_vc11817.aig
COMMAND LINE= /tmp/evaluation/460542-1179250250/aigsat-wc /tmp/evaluation/460542-1179250250/instance-460542-1179250250.aig            
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node3/watcher-460542-1179250250 -o ROOT/results/node3/solver-460542-1179250250 -C 1200 -W 1800 -M 1800 --output-limit 1,15 -S 1 /tmp/evaluation/460542-1179250250/aigsat-wc /tmp/evaluation/460542-1179250250/instance-460542-1179250250.aig            

META MD5SUM SOLVER= a44537a071ffb1a142b3275181a5083c
MD5SUM BENCH=  347b3fcbab5c5ce736d37ab277cb2ec1

RANDOM SEED= 119534702

TIME LIMIT= 1200 seconds
MEMORY LIMIT= 1800 MiB

Linux node3.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		: 3000.270
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		: 3000.270
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:       1602488 kB
Buffers:         52556 kB
Cached:         304988 kB
SwapCached:      18360 kB
Active:          39900 kB
Inactive:       342072 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1602488 kB
SwapTotal:     4192956 kB
SwapFree:      4138692 kB
Dirty:            4852 kB
Writeback:           0 kB
Mapped:          30172 kB
Slab:            56848 kB
Committed_AS: 11814816 kB
PageTables:       1780 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= 66540 MiB

End job on node3 on Tue May 15 17:34:02 UTC 2007