Trace number 320324

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
Spear FHS 1.0UNSAT 193.265 193.315

General information on the benchmark

Nameindustrial/manolios/
manol-pipe-c6nidw_i.cnf
MD5SUM15c4413e436aecbd4fcb1d7037e18abf
Bench CategoryINDUST (industrial instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark74.3737
Satisfiable
(Un)Satisfiability was proved
Number of variables95863
Number of clauses283363
Sum of the clauses size661179
Maximum clause length3
Minimum clause length1
Number of clauses of size 11
Number of clauses of size 2188908
Number of clauses of size 394454
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data (download as text)

0.00/0.00	c (*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*) 
0.00/0.00	c (*)                                             (*) 
0.00/0.00	c (*)          Spear theorem prover               (*) 
0.00/0.00	c (*)        Copyright (C) 2006,2007              (*) 
0.00/0.00	c (*)     Domagoj Babic. All rights reserved.     (*) 
0.00/0.00	c (*)                                             (*) 
0.00/0.00	c (*)     There is NO warranty, not even for      (*) 
0.00/0.00	c (*) merchantability or fitness for a particular (*) 
0.00/0.00	c (*)  purpose. Please run with --license to see  (*) 
0.00/0.00	c (*)              license details.               (*) 
0.00/0.00	c (*)                                             (*) 
0.00/0.00	c (*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*)(*) 
0.00/0.00	c 
0.00/0.00	c solving /tmp/evaluation/320324-1173044240/instance-320324-1173044240.cnf
193.14/193.29	s UNSATISFIABLE
193.14/193.29	c runtime 193.26 [s]

Verifier Data (download as text)

No possible verification on an UNSAT instance

Watcher Data (download as text)

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

command line: runsolver --timestamp -w ROOT/results/node67/watcher-320324-1173044240 -o ROOT/results/node67/solver-320324-1173044240 -C 1200 -W 2400 -M 1800 --output-limit 1,15 /tmp/evaluation/320324-1173044240/Spear-32 --model-stdout --time --spset-autotuned-fh_1_1 --dimacs /tmp/evaluation/320324-1173044240/instance-320324-1173044240.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 0.92 3/64 4978
/proc/meminfo: memFree=851688/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=1532 CPUtime=0
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 209 0 0 0 0 0 0 0 18 0 1 0 324381651 1568768 193 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 134867508 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 383 193 128 302 0 78 0

[startup+0.013551 s]
/proc/loadavg: 0.91 0.95 0.92 3/64 4978
/proc/meminfo: memFree=851688/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=2052 CPUtime=0.01
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 311 0 0 0 1 0 0 0 18 0 1 0 324381651 2101248 296 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 134518170 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 513 296 128 302 0 208 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 2052

[startup+0.101559 s]
/proc/loadavg: 0.91 0.95 0.92 3/64 4978
/proc/meminfo: memFree=851688/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=5352 CPUtime=0.09
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 1247 0 0 0 9 0 0 0 18 0 1 0 324381651 5480448 1092 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 1338 1092 129 302 0 1033 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 5352

[startup+0.301579 s]
/proc/loadavg: 0.91 0.95 0.92 3/64 4978
/proc/meminfo: memFree=851688/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=13028 CPUtime=0.29
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 3579 0 0 0 26 3 0 0 19 0 1 0 324381651 13340672 2698 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 3257 2698 129 302 0 2952 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 13028

[startup+0.701621 s]
/proc/loadavg: 0.91 0.95 0.92 3/64 4978
/proc/meminfo: memFree=851688/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=26596 CPUtime=0.69
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 7826 0 0 0 61 8 0 0 22 0 1 0 324381651 27234304 5917 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 6649 5918 129 302 0 6344 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 26596

[startup+1.5017 s]
/proc/loadavg: 0.91 0.95 0.92 2/65 4979
/proc/meminfo: memFree=822432/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=45256 CPUtime=1.49
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 12847 0 0 0 140 9 0 0 25 0 1 0 324381651 46342144 10534 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 135258954 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 11314 10534 145 302 0 11009 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 45256

[startup+3.10187 s]
/proc/loadavg: 0.91 0.95 0.92 2/65 4979
/proc/meminfo: memFree=795424/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=71108 CPUtime=3.09
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 19786 0 0 0 295 14 0 0 25 0 1 0 324381651 72814592 16576 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 17777 16576 145 302 0 17472 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 71108

[startup+6.3012 s]
/proc/loadavg: 0.92 0.95 0.92 2/65 4979
/proc/meminfo: memFree=783776/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=73588 CPUtime=6.29
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 20379 0 0 0 610 19 0 0 25 0 1 0 324381651 75354112 17169 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 18397 17169 145 302 0 18092 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 73588

[startup+12.7019 s]
/proc/loadavg: 0.93 0.95 0.92 2/65 4979
/proc/meminfo: memFree=778600/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=78752 CPUtime=12.69
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 21695 0 0 0 1242 27 0 0 25 0 1 0 324381651 80642048 18452 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 19688 18452 145 302 0 19383 0
Current children cumulated CPU time (s) 12.69
Current children cumulated vsize (KiB) 78752

[startup+25.5012 s]
/proc/loadavg: 0.94 0.96 0.92 2/65 4979
/proc/meminfo: memFree=768744/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=88544 CPUtime=25.49
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 24210 0 0 0 2508 41 0 0 25 0 1 0 324381651 90669056 20902 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 22136 20902 145 302 0 21831 0
Current children cumulated CPU time (s) 25.49
Current children cumulated vsize (KiB) 88544

[startup+51.1019 s]
/proc/loadavg: 0.96 0.96 0.92 2/65 4979
/proc/meminfo: memFree=754536/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=102964 CPUtime=51.08
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 27892 0 0 0 5046 62 0 0 25 0 1 0 324381651 105435136 24455 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 25741 24455 145 302 0 25436 0
Current children cumulated CPU time (s) 51.08
Current children cumulated vsize (KiB) 102964

[startup+102.305 s]
/proc/loadavg: 0.98 0.96 0.92 2/65 4979
/proc/meminfo: memFree=733288/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=124892 CPUtime=102.26
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 33422 0 0 0 10132 94 0 0 25 0 1 0 324381651 127889408 29728 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 134558750 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 31223 29728 145 302 0 30918 0
Current children cumulated CPU time (s) 102.26
Current children cumulated vsize (KiB) 124892

[startup+162.301 s]
/proc/loadavg: 0.99 0.97 0.92 2/65 4979
/proc/meminfo: memFree=714920/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=142948 CPUtime=162.24
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 37998 0 0 0 16106 118 0 0 25 0 1 0 324381651 146378752 34304 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 134526784 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 35737 34304 145 302 0 35432 0
Current children cumulated CPU time (s) 162.24
Current children cumulated vsize (KiB) 142948

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

[startup+179.101 s]
/proc/loadavg: 0.99 0.97 0.92 2/65 4979
/proc/meminfo: memFree=711336/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=146648 CPUtime=179.05
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 38924 0 0 0 17781 124 0 0 25 0 1 0 324381651 150167552 35230 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 134526883 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 36662 35230 145 302 0 36357 0
Current children cumulated CPU time (s) 179.05
Current children cumulated vsize (KiB) 146648

[startup+185.502 s]
/proc/loadavg: 0.99 0.97 0.92 2/65 4979
/proc/meminfo: memFree=710312/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=147616 CPUtime=185.44
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 39147 0 0 0 18419 125 0 0 25 0 1 0 324381651 151158784 35453 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 36904 35453 145 302 0 36599 0
Current children cumulated CPU time (s) 185.44
Current children cumulated vsize (KiB) 147616

[startup+188.701 s]
/proc/loadavg: 0.99 0.97 0.92 2/65 4979
/proc/meminfo: memFree=709800/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=147992 CPUtime=188.64
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 39256 0 0 0 18738 126 0 0 25 0 1 0 324381651 151543808 35562 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 36998 35562 145 302 0 36693 0
Current children cumulated CPU time (s) 188.64
Current children cumulated vsize (KiB) 147992

[startup+191.902 s]
/proc/loadavg: 0.99 0.97 0.92 2/65 4979
/proc/meminfo: memFree=709672/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=148124 CPUtime=191.84
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 39275 0 0 0 19057 127 0 0 25 0 1 0 324381651 151678976 35581 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 37031 35581 145 302 0 36726 0
Current children cumulated CPU time (s) 191.84
Current children cumulated vsize (KiB) 148124

[startup+192.702 s]
/proc/loadavg: 0.99 0.97 0.92 2/65 4979
/proc/meminfo: memFree=709672/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=148124 CPUtime=192.64
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 39278 0 0 0 19137 127 0 0 25 0 1 0 324381651 151678976 35584 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 37031 35584 145 302 0 36726 0
Current children cumulated CPU time (s) 192.64
Current children cumulated vsize (KiB) 148124

[startup+193.102 s]
/proc/loadavg: 0.99 0.97 0.92 2/65 4979
/proc/meminfo: memFree=709672/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=148124 CPUtime=193.04
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194304 39280 0 0 0 19177 127 0 0 25 0 1 0 324381651 151678976 35586 18446744073709551615 134512640 135752790 4294956640 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 37031 35586 145 302 0 36726 0
Current children cumulated CPU time (s) 193.04
Current children cumulated vsize (KiB) 148124

[startup+193.302 s]
/proc/loadavg: 0.99 0.97 0.92 2/65 4979
/proc/meminfo: memFree=709672/2055920 swapFree=4183980/4192956
[pid=4978] ppid=4976 vsize=0 CPUtime=193.24
/proc/4978/stat : 4978 (Spear-32) R 4976 4978 4875 0 -1 4194308 39300 0 0 0 19196 128 0 0 25 0 1 0 324381651 0 0 18446744073709551615 0 0 0 0 0 0 0 4096 0 0 0 0 17 1 0 0
/proc/4978/statm: 0 0 0 0 0 0 0
Current children cumulated CPU time (s) 193.24
Current children cumulated vsize (KiB) 0

Child status: 20
Real time (s): 193.315
CPU time (s): 193.265
CPU user time (s): 191.966
CPU system time (s): 1.2988
CPU usage (%): 99.9737
Max. virtual memory (cumulated for all children) (KiB): 148124

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 191.966
system time used= 1.2988
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 39300
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= 7
involuntary context switches= 492

runsolver used 0.144977 second user time and 0.396939 second system time

The end

Launcher Data (download as text)

Begin job on node67 on Sun Mar  4 21:37:20 UTC 2007

IDJOB= 320324
IDBENCH= 20500
IDSOLVER= 131
FILE ID= node67/320324-1173044240

PBS_JOBID= 4012508

Free space on /tmp= 66544 MiB

SOLVER NAME= Spear FHS 1.0
BENCH NAME= HOME/pub/bench/SAT07/industrial/manolios/manol-pipe-c6nidw_i.cnf
COMMAND LINE= /tmp/evaluation/320324-1173044240/Spear-32 --model-stdout --time --spset-autotuned-fh_1_1 --dimacs /tmp/evaluation/320324-1173044240/instance-320324-1173044240.cnf            
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node67/watcher-320324-1173044240 -o ROOT/results/node67/solver-320324-1173044240 -C 1200 -W 2400 -M 1800 --output-limit 1,15  /tmp/evaluation/320324-1173044240/Spear-32 --model-stdout --time --spset-autotuned-fh_1_1 --dimacs /tmp/evaluation/320324-1173044240/instance-320324-1173044240.cnf            

META MD5SUM SOLVER= 53b58dfa80430416a78fe762713f980c
MD5SUM BENCH=  15c4413e436aecbd4fcb1d7037e18abf

RANDOM SEED= 100254816

TIME LIMIT= 1200 seconds
MEMORY LIMIT= 1800 MiB

Linux node67.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		: 3000.236
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		: 3000.236
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:        852160 kB
Buffers:         47264 kB
Cached:        1060612 kB
SwapCached:       3312 kB
Active:         798656 kB
Inactive:       319000 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:        852160 kB
SwapTotal:     4192956 kB
SwapFree:      4183980 kB
Dirty:            6184 kB
Writeback:           0 kB
Mapped:          15452 kB
Slab:            72020 kB
Committed_AS:   870112 kB
PageTables:       1452 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= 66544 MiB

End job on node67 on Sun Mar  4 21:40:34 UTC 2007