Trace number 293835

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
SATzilla RANDOMSAT 5.15322 5.15924

General information on the benchmark

Namerandom/OnTreshold/5SAT/v110/
unif-k5-r21.3-v110-c2343-S1813726766-14.SAT.shuffled.cnf
MD5SUM87ba5bd7274af5ee4370015ed975d3db
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.020996
Satisfiable
(Un)Satisfiability was proved
Number of variables110
Number of clauses2343
Sum of the clauses size11715
Maximum clause length5
Minimum clause length5
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 30
Number of clauses of size 40
Number of clauses of size 52343
Number of clauses of size over 50

Solver Data (download as text)

4.99/5.15	c run March_dl for 5 seconds ... 
4.99/5.15	c Bin: Executing march_dl
4.99/5.15	c child exit by a signal
4.99/5.15	c march_dl returned code 137.
4.99/5.15	c run saps (UBCSAT implementation) for 2 seconds ... 
4.99/5.15	c Bin: Executing ubcsat2006
4.99/5.15	c child exited successfully
4.99/5.15	c ubcsat2006 returned code 10.
4.99/5.15	# 
4.99/5.15	# UBCSAT version 1.1.0pp
4.99/5.15	# 
4.99/5.15	# http://www.satlib.org/ubcsat
4.99/5.15	# 
4.99/5.15	# ubcsat -h for help
4.99/5.15	# 
4.99/5.15	#  -alg saps
4.99/5.15	#  -runs 1 
4.99/5.15	#  -cutoff 4294967295 
4.99/5.15	#  -timeout 2.000000 
4.99/5.15	#  -gtimeout 0.000000 
4.99/5.15	#  -noimprove 0 
4.99/5.15	#  -target 0 
4.99/5.15	#  -wtarget 0.000000 
4.99/5.15	#  -seed 1171778240 
4.99/5.15	#  -solve 0 
4.99/5.15	#  -find,-numsol 0 
4.99/5.15	#  -findunique 0 
4.99/5.15	#  -srestart 0 
4.99/5.15	#  -prestart 0.000000 
4.99/5.15	#  -drestart 0 
4.99/5.15	# 
4.99/5.15	#  -alpha 1.300000 
4.99/5.15	#  -rho 0.100000 
4.99/5.15	#  -ps 0.050000 
4.99/5.15	#  -wp 0.010000 
4.99/5.15	#  -sapsthresh -0.100000 
4.99/5.15	# 
4.99/5.15	# UBCSAT default output: 
4.99/5.15	#    'ubcsat -r out null' to suppress, 'ubcsat -hc' for customization help
4.99/5.15	# 
4.99/5.15	# 
4.99/5.15	# Output Columns: |run|found|best|beststep|steps|
4.99/5.15	# 
4.99/5.15	# run: Run Number
4.99/5.15	# found: Target Solution Quality Found? (1 => yes)
4.99/5.15	# best: Best (Lowest) # of False Clauses Found
4.99/5.15	# beststep: Step of Best (Lowest) # of False Clauses Found
4.99/5.15	# steps: Total Number of Search Steps
4.99/5.15	# 
4.99/5.15	#       F  Best       Step      Total 
4.99/5.15	#   Run N Sol'n         of     Search 
4.99/5.15	#   No. D Found       Best      Steps 
4.99/5.15	# 
4.99/5.15	      1 1     0      34057      34057 
4.99/5.15	
4.99/5.15	
4.99/5.15	Variables = 110
4.99/5.15	Clauses = 2343
4.99/5.15	TotalLiterals = 11715
4.99/5.15	TotalCPUTimeElapsed = 0.130     
4.99/5.15	FlipsPerSecond = 261977 
4.99/5.15	RunsExecuted = 1
4.99/5.15	SuccessfulRuns = 1
4.99/5.15	PercentSuccess = 100.00
4.99/5.15	Steps_Mean = 34057
4.99/5.15	Steps_CoeffVariance = 0
4.99/5.15	Steps_Median = 34057
4.99/5.15	CPUTime_Mean = 0.13
4.99/5.15	CPUTime_CoeffVariance = 0
4.99/5.15	CPUTime_Median = 0.13
4.99/5.15	
4.99/5.15	
4.99/5.15	c 
4.99/5.15	c UBCSAT version 1.1.0pp
4.99/5.15	c 
4.99/5.15	c http://www.satlib.org/ubcsat
4.99/5.15	c 
4.99/5.15	c ubcsat -h for help
4.99/5.15	c 
4.99/5.15	c  -runs 1 
4.99/5.15	c  -cutoff 4294967295 
4.99/5.15	c  -timeout 2.000000 
4.99/5.15	c  -gtimeout 0.000000 
4.99/5.15	c  -noimprove 0 
4.99/5.15	c  -target 0 
4.99/5.15	c  -wtarget 0.000000 
4.99/5.15	c  -seed 1171778240 
4.99/5.15	c  -solve 0 
4.99/5.15	c  -find,-numsol 0 
4.99/5.15	c  -findunique 0 
4.99/5.15	c  -srestart 0 
4.99/5.15	c  -prestart 0.000000 
4.99/5.15	c  -drestart 0 
4.99/5.15	c 
4.99/5.15	c  -alpha 1.300000 
4.99/5.15	c  -rho 0.100000 
4.99/5.15	c  -ps 0.050000 
4.99/5.15	c  -wp 0.010000 
4.99/5.15	c  -sapsthresh -0.100000 
4.99/5.15	c 
4.99/5.15	s SATISFIABLE
4.99/5.15	v  1 -2 -3 4 -5 -6 -7 -8 -9 10
4.99/5.15	v  -11 -12 -13 14 -15 -16 -17 -18 -19 20
4.99/5.15	v  21 22 -23 24 25 -26 -27 28 29 -30
4.99/5.15	v  -31 -32 33 34 35 -36 37 38 39 40
4.99/5.15	v  41 42 -43 -44 45 -46 47 48 -49 50
4.99/5.15	v  51 -52 53 -54 55 56 57 58 59 60
4.99/5.15	v  -61 62 63 64 -65 66 67 68 69 -70
4.99/5.15	v  -71 72 73 -74 -75 76 -77 -78 -79 80
4.99/5.15	v  -81 -82 -83 84 -85 -86 87 88 -89 -90
4.99/5.15	v  -91 92 -93 -94 -95 -96 97 98 99 -100
4.99/5.15	v  101 -102 -103 104 -105 106 107 108 109 110
4.99/5.15	v  0
4.99/5.15	c SATZILLA_TIME=5.140000

Verifier Data (download as text)

OK

Watcher Data (download as text)

runsolver version 3.2.0 (c) roussel@cril.univ-artois.fr

command line: runsolver --timestamp -w ROOT/results/node12/watcher-293835-1171778240 -o ROOT/results/node12/solver-293835-1171778240 -C 1200 -M 1800 --output-limit 1,15 /tmp/evaluation/293835-1171778240/SATzilla2007_R /tmp/evaluation/293835-1171778240/instance-293835-1171778240.cnf 

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 1230 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: 1.02 1.01 1.21 3/77 14974
/proc/meminfo: memFree=309288/2055920 swapFree=4154904/4192956
[pid=14974] ppid=14972 vsize=1440 CPUtime=0
/proc/14974/stat : 14974 (SATzilla2007_R) R 14972 14974 14002 0 -1 4194304 127 0 0 0 0 0 0 0 18 0 1 0 197778485 1474560 110 18446744073709551615 134512640 135579813 4294956608 18446744073709551615 135216547 0 0 4096 0 0 0 0 17 1 0 0
/proc/14974/statm: 360 110 95 260 0 84 0
[pid=14975] ppid=14974 vsize=636 CPUtime=0
/proc/14975/stat : 14975 (march_dl) R 14974 14974 14002 0 -1 4194304 80 0 0 0 0 0 0 0 18 0 1 0 197778485 651264 75 18446744073709551615 134512640 134996440 4294956640 18446744073709551615 134652876 0 0 8392704 0 0 0 0 17 1 0 0
/proc/14975/statm: 159 75 50 118 0 38 0

[startup+0.106844 s]
/proc/loadavg: 1.02 1.01 1.21 3/77 14974
/proc/meminfo: memFree=309288/2055920 swapFree=4154904/4192956
[pid=14974] ppid=14972 vsize=1440 CPUtime=0
/proc/14974/stat : 14974 (SATzilla2007_R) S 14972 14974 14002 0 -1 4194304 128 0 0 0 0 0 0 0 18 0 1 0 197778485 1474560 110 18446744073709551615 134512640 135579813 4294956608 18446744073709551615 135216413 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/14974/statm: 360 110 95 260 0 84 0
[pid=14975] ppid=14974 vsize=2556 CPUtime=0.1
/proc/14975/stat : 14975 (march_dl) R 14974 14974 14002 0 -1 4194304 571 0 0 0 10 0 0 0 19 0 1 0 197778485 2617344 563 18446744073709551615 134512640 134996440 4294956640 18446744073709551615 134644061 0 0 8392704 0 0 0 0 17 1 0 0
/proc/14975/statm: 639 563 72 118 0 518 0
Current children cumulated CPU time (s) 0.1
Current children cumulated vsize (KiB) 3996

[startup+0.514918 s]
/proc/loadavg: 1.02 1.01 1.21 3/77 14974
/proc/meminfo: memFree=309288/2055920 swapFree=4154904/4192956
[pid=14974] ppid=14972 vsize=1440 CPUtime=0
/proc/14974/stat : 14974 (SATzilla2007_R) S 14972 14974 14002 0 -1 4194304 128 0 0 0 0 0 0 0 18 0 1 0 197778485 1474560 110 18446744073709551615 134512640 135579813 4294956608 18446744073709551615 135216413 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/14974/statm: 360 110 95 260 0 84 0
[pid=14975] ppid=14974 vsize=2796 CPUtime=0.51
/proc/14975/stat : 14975 (march_dl) R 14974 14974 14002 0 -1 4194304 617 0 0 0 51 0 0 0 23 0 1 0 197778485 2863104 609 18446744073709551615 134512640 134996440 4294956640 18446744073709551615 134526942 0 0 8392704 0 0 0 0 17 1 0 0
/proc/14975/statm: 699 609 74 118 0 578 0
Current children cumulated CPU time (s) 0.51
Current children cumulated vsize (KiB) 4236

[startup+1.33607 s]
/proc/loadavg: 1.02 1.01 1.20 2/79 14976
/proc/meminfo: memFree=306840/2055920 swapFree=4154904/4192956
[pid=14974] ppid=14972 vsize=1440 CPUtime=0
/proc/14974/stat : 14974 (SATzilla2007_R) S 14972 14974 14002 0 -1 4194304 128 0 0 0 0 0 0 0 18 0 1 0 197778485 1474560 110 18446744073709551615 134512640 135579813 4294956608 18446744073709551615 135216413 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/14974/statm: 360 110 95 260 0 84 0
[pid=14975] ppid=14974 vsize=3520 CPUtime=1.33
/proc/14975/stat : 14975 (march_dl) R 14974 14974 14002 0 -1 4194304 790 0 0 0 133 0 0 0 25 0 1 0 197778485 3604480 782 18446744073709551615 134512640 134996440 4294956640 18446744073709551615 134527856 0 0 8392704 0 0 0 0 17 1 0 0
/proc/14975/statm: 880 782 74 118 0 759 0
Current children cumulated CPU time (s) 1.33
Current children cumulated vsize (KiB) 4960

[startup+2.97936 s]
/proc/loadavg: 1.02 1.01 1.20 2/79 14976
/proc/meminfo: memFree=305624/2055920 swapFree=4154904/4192956
[pid=14974] ppid=14972 vsize=1440 CPUtime=0
/proc/14974/stat : 14974 (SATzilla2007_R) S 14972 14974 14002 0 -1 4194304 128 0 0 0 0 0 0 0 18 0 1 0 197778485 1474560 110 18446744073709551615 134512640 135579813 4294956608 18446744073709551615 135216413 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/14974/statm: 360 110 95 260 0 84 0
[pid=14975] ppid=14974 vsize=4312 CPUtime=2.97
/proc/14975/stat : 14975 (march_dl) R 14974 14974 14002 0 -1 4194304 982 0 0 0 297 0 0 0 25 0 1 0 197778485 4415488 974 18446744073709551615 134512640 134996440 4294956640 18446744073709551615 134567185 0 0 8392704 0 0 0 0 17 1 0 0
/proc/14975/statm: 1078 974 74 118 0 957 0
Current children cumulated CPU time (s) 2.97
Current children cumulated vsize (KiB) 5752

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

[startup+3.28542 s]
/proc/loadavg: 1.02 1.01 1.20 2/79 14976
/proc/meminfo: memFree=305624/2055920 swapFree=4154904/4192956
[pid=14974] ppid=14972 vsize=1440 CPUtime=0
/proc/14974/stat : 14974 (SATzilla2007_R) S 14972 14974 14002 0 -1 4194304 128 0 0 0 0 0 0 0 18 0 1 0 197778485 1474560 110 18446744073709551615 134512640 135579813 4294956608 18446744073709551615 135216413 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/14974/statm: 360 110 95 260 0 84 0
[pid=14975] ppid=14974 vsize=4444 CPUtime=3.27
/proc/14975/stat : 14975 (march_dl) R 14974 14974 14002 0 -1 4194304 998 0 0 0 327 0 0 0 25 0 1 0 197778485 4550656 990 18446744073709551615 134512640 134996440 4294956640 18446744073709551615 134527810 0 0 8392704 0 0 0 0 17 1 0 0
/proc/14975/statm: 1111 990 74 118 0 990 0
Current children cumulated CPU time (s) 3.27
Current children cumulated vsize (KiB) 5884

[startup+4.10556 s]
/proc/loadavg: 1.02 1.01 1.20 2/79 14976
/proc/meminfo: memFree=305368/2055920 swapFree=4154904/4192956
[pid=14974] ppid=14972 vsize=1440 CPUtime=0
/proc/14974/stat : 14974 (SATzilla2007_R) S 14972 14974 14002 0 -1 4194304 128 0 0 0 0 0 0 0 18 0 1 0 197778485 1474560 110 18446744073709551615 134512640 135579813 4294956608 18446744073709551615 135216413 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/14974/statm: 360 110 95 260 0 84 0
[pid=14975] ppid=14974 vsize=4576 CPUtime=4.09
/proc/14975/stat : 14975 (march_dl) R 14974 14974 14002 0 -1 4194304 1032 0 0 0 409 0 0 0 25 0 1 0 197778485 4685824 1024 18446744073709551615 134512640 134996440 4294956640 18446744073709551615 134551546 0 0 8392704 0 0 0 0 17 1 0 0
/proc/14975/statm: 1144 1024 74 118 0 1023 0
Current children cumulated CPU time (s) 4.09
Current children cumulated vsize (KiB) 6016

[startup+4.92571 s]
/proc/loadavg: 1.02 1.01 1.20 2/79 14976
/proc/meminfo: memFree=304856/2055920 swapFree=4154904/4192956
[pid=14974] ppid=14972 vsize=1440 CPUtime=0
/proc/14974/stat : 14974 (SATzilla2007_R) S 14972 14974 14002 0 -1 4194304 128 0 0 0 0 0 0 0 18 0 1 0 197778485 1474560 110 18446744073709551615 134512640 135579813 4294956608 18446744073709551615 135216413 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/14974/statm: 360 110 95 260 0 84 0
[pid=14975] ppid=14974 vsize=4708 CPUtime=4.91
/proc/14975/stat : 14975 (march_dl) R 14974 14974 14002 0 -1 4194304 1064 0 0 0 490 1 0 0 25 0 1 0 197778485 4820992 1056 18446744073709551615 134512640 134996440 4294956640 18446744073709551615 134565173 0 0 8392704 0 0 0 0 17 1 0 0
/proc/14975/statm: 1177 1056 74 118 0 1056 0
Current children cumulated CPU time (s) 4.91
Current children cumulated vsize (KiB) 6148

[startup+5.12975 s]
/proc/loadavg: 1.02 1.01 1.20 2/79 14976
/proc/meminfo: memFree=304856/2055920 swapFree=4154904/4192956
[pid=14974] ppid=14972 vsize=1440 CPUtime=4.99
/proc/14974/stat : 14974 (SATzilla2007_R) S 14972 14974 14002 0 -1 4194304 135 1065 0 0 0 0 498 1 16 0 1 0 197778485 1474560 111 18446744073709551615 134512640 135579813 4294956608 18446744073709551615 135216413 0 0 4096 0 18446744071563356171 0 0 17 0 0 0
/proc/14974/statm: 360 111 96 260 0 84 0
Current children cumulated CPU time (s) 4.99
Current children cumulated vsize (KiB) 1440

Child status: 10
Real time (s): 5.15924
CPU time (s): 5.15322
CPU user time (s): 5.12422
CPU system time (s): 0.028995
CPU usage (%): 99.8832
Max. virtual memory (cumulated for all children) (KiB): 6148

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 5.12422
system time used= 0.028995
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 1510
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= 17
involuntary context switches= 6

runsolver used 0.006998 second user time and 0.016997 second system time

The end

Launcher Data (download as text)

Begin job on node12 on Sun Feb 18 05:57:20 UTC 2007

IDJOB= 293835
IDBENCH= 19873
IDSOLVER= 134
FILE ID= node12/293835-1171778240

PBS_JOBID= 3839286

Free space on /tmp= 66545 MiB

SOLVER NAME= SATzilla RANDOM
BENCH NAME= HOME/pub/bench/SAT07/random/OnTreshold/5SAT/v110/unif-k5-r21.3-v110-c2343-S1813726766-14.SAT.shuffled.cnf
COMMAND LINE= /tmp/evaluation/293835-1171778240/SATzilla2007_R /tmp/evaluation/293835-1171778240/instance-293835-1171778240.cnf            
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node12/watcher-293835-1171778240 -o ROOT/results/node12/solver-293835-1171778240 -C 1200 -M 1800 --output-limit 1,15  /tmp/evaluation/293835-1171778240/SATzilla2007_R /tmp/evaluation/293835-1171778240/instance-293835-1171778240.cnf            

META MD5SUM SOLVER= 44dcaa7dbf032757655ae5e30ee65a10
MD5SUM BENCH=  87ba5bd7274af5ee4370015ed975d3db

RANDOM SEED= 140617636

TIME LIMIT= 1200 seconds
MEMORY LIMIT= 1800 MiB

Linux node12.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		: 3000.285
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		: 3000.285
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:        309760 kB
Buffers:         47964 kB
Cached:        1601396 kB
SwapCached:      18068 kB
Active:         194844 kB
Inactive:      1481228 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:        309760 kB
SwapTotal:     4192956 kB
SwapFree:      4154904 kB
Dirty:            8428 kB
Writeback:           0 kB
Mapped:          30452 kB
Slab:            55676 kB
Committed_AS:   928072 kB
PageTables:       1696 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= 66545 MiB

End job on node12 on Sun Feb 18 05:57:26 UTC 2007