Trace number 315542

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
picosat 535UNSAT 312.447 312.531

General information on the benchmark

Nameindustrial/palacios/uts/
uts-l06-ipc5-h31-unknown.cnf
MD5SUM4211c3af8594e6cbb06d7f7e8978c614
Bench CategoryINDUST (industrial instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark53.0629
Satisfiable
(Un)Satisfiability was proved
Number of variables149210
Number of clauses761906
Sum of the clauses size1988854
Maximum clause length591
Minimum clause length1
Number of clauses of size 1276
Number of clauses of size 2614506
Number of clauses of size 3141844
Number of clauses of size 41307
Number of clauses of size 5115
Number of clauses of size over 53858

Solver Data (download as text)

312.40/312.52	s UNSATISFIABLE

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/node68/watcher-315542-1172655721 -o ROOT/results/node68/solver-315542-1172655721 -C 1200 -W 2400 -M 1800 --output-limit 1,15 /tmp/evaluation/315542-1172655721/picosat /tmp/evaluation/315542-1172655721/instance-315542-1172655721.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: 0.92 0.98 0.99 3/64 14593
/proc/meminfo: memFree=1527904/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=884 CPUtime=0
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 140 0 0 0 0 0 0 0 18 0 1 0 285529728 905216 125 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134605937 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 221 125 40 102 0 116 0

[startup+0.00956507 s]
/proc/loadavg: 0.92 0.98 0.99 3/64 14593
/proc/meminfo: memFree=1527904/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=884 CPUtime=0
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 141 0 0 0 0 0 0 0 18 0 1 0 285529728 905216 126 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134605937 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 221 126 40 102 0 116 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 884

[startup+0.101572 s]
/proc/loadavg: 0.92 0.98 0.99 3/64 14593
/proc/meminfo: memFree=1527904/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=1220 CPUtime=0.09
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 231 0 0 0 4 5 0 0 18 0 1 0 285529728 1249280 214 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134605937 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 305 214 46 102 0 200 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 1220

[startup+0.301591 s]
/proc/loadavg: 0.92 0.98 0.99 3/64 14593
/proc/meminfo: memFree=1527904/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=1616 CPUtime=0.29
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 336 0 0 0 13 16 0 0 19 0 1 0 285529728 1654784 319 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134605937 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 404 319 46 102 0 299 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 1616

[startup+0.701626 s]
/proc/loadavg: 0.92 0.98 0.99 3/64 14593
/proc/meminfo: memFree=1527904/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=2992 CPUtime=0.69
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 631 0 0 0 29 40 0 0 22 0 1 0 285529728 3063808 614 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134605937 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 748 615 46 102 0 643 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 2992

[startup+1.5017 s]
/proc/loadavg: 0.92 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1524696/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=5732 CPUtime=1.49
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 1271 0 0 0 65 84 0 0 25 0 1 0 285529728 5869568 1254 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134605937 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 1433 1254 46 102 0 1328 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 5732

[startup+3.10184 s]
/proc/loadavg: 0.92 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1520728/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=11328 CPUtime=3.09
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 2626 0 0 0 137 172 0 0 25 0 1 0 285529728 11599872 2609 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134605937 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 2832 2609 46 102 0 2727 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 11328

[startup+6.30213 s]
/proc/loadavg: 0.93 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1507288/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=33448 CPUtime=6.29
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 6255 0 0 0 291 338 0 0 25 0 1 0 285529728 34250752 6238 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134525554 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 8362 6238 48 102 0 8257 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 33448

[startup+12.7017 s]
/proc/loadavg: 0.93 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1502360/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=35892 CPUtime=12.69
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 6375 0 0 0 931 338 0 0 25 0 1 0 285529728 36753408 6358 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134525657 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 8973 6358 48 102 0 8868 0
Current children cumulated CPU time (s) 12.69
Current children cumulated vsize (KiB) 35892

[startup+25.5019 s]
/proc/loadavg: 0.95 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1501464/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=36932 CPUtime=25.48
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 6642 0 0 0 2210 338 0 0 25 0 1 0 285529728 37818368 6625 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134523092 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 9233 6625 48 102 0 9128 0
Current children cumulated CPU time (s) 25.48
Current children cumulated vsize (KiB) 36932

[startup+51.1012 s]
/proc/loadavg: 0.96 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1499416/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=38900 CPUtime=51.08
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 7138 0 0 0 4769 339 0 0 25 0 1 0 285529728 39833600 7121 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134524001 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 9725 7121 48 102 0 9620 0
Current children cumulated CPU time (s) 51.08
Current children cumulated vsize (KiB) 38900

[startup+102.306 s]
/proc/loadavg: 0.98 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1493784/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=44472 CPUtime=102.27
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 8553 0 0 0 9887 340 0 0 25 0 1 0 285529728 45539328 8536 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134524027 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 11118 8536 48 102 0 11013 0
Current children cumulated CPU time (s) 102.27
Current children cumulated vsize (KiB) 44472

[startup+162.301 s]
/proc/loadavg: 0.99 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1489560/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=48492 CPUtime=162.24
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 9610 0 0 0 15883 341 0 0 25 0 1 0 285529728 49655808 9557 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134525823 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 12123 9557 48 102 0 12018 0
Current children cumulated CPU time (s) 162.24
Current children cumulated vsize (KiB) 48492

[startup+222.302 s]
/proc/loadavg: 0.99 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1489560/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=48492 CPUtime=222.23
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 9612 0 0 0 21882 341 0 0 25 0 1 0 285529728 49655808 9559 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134525751 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 12123 9559 48 102 0 12018 0
Current children cumulated CPU time (s) 222.23
Current children cumulated vsize (KiB) 48492

[startup+282.301 s]
/proc/loadavg: 0.99 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1489560/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=48492 CPUtime=282.21
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 9614 0 0 0 27880 341 0 0 25 0 1 0 285529728 49655808 9561 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134525754 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 12123 9561 48 102 0 12018 0
Current children cumulated CPU time (s) 282.21
Current children cumulated vsize (KiB) 48492

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

[startup+294.301 s]
/proc/loadavg: 0.99 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1489560/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=48492 CPUtime=294.21
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 9614 0 0 0 29080 341 0 0 25 0 1 0 285529728 49655808 9561 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134522740 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 12123 9561 48 102 0 12018 0
Current children cumulated CPU time (s) 294.21
Current children cumulated vsize (KiB) 48492

[startup+300.702 s]
/proc/loadavg: 0.99 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1489560/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=48492 CPUtime=300.61
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 9615 0 0 0 29720 341 0 0 25 0 1 0 285529728 49655808 9562 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134525754 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 12123 9562 48 102 0 12018 0
Current children cumulated CPU time (s) 300.61
Current children cumulated vsize (KiB) 48492

[startup+307.101 s]
/proc/loadavg: 0.99 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1489560/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=48492 CPUtime=307
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 9616 0 0 0 30359 341 0 0 25 0 1 0 285529728 49655808 9563 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134525754 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 12123 9563 48 102 0 12018 0
Current children cumulated CPU time (s) 307
Current children cumulated vsize (KiB) 48492

[startup+310.302 s]
/proc/loadavg: 0.99 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1489560/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=48492 CPUtime=310.2
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 9616 0 0 0 30679 341 0 0 25 0 1 0 285529728 49655808 9563 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134522836 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 12123 9563 48 102 0 12018 0
Current children cumulated CPU time (s) 310.2
Current children cumulated vsize (KiB) 48492

[startup+311.902 s]
/proc/loadavg: 0.99 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1489560/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=48492 CPUtime=311.8
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 9616 0 0 0 30839 341 0 0 25 0 1 0 285529728 49655808 9563 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134525860 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 12123 9563 48 102 0 12018 0
Current children cumulated CPU time (s) 311.8
Current children cumulated vsize (KiB) 48492

[startup+312.302 s]
/proc/loadavg: 0.99 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1489560/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=48492 CPUtime=312.21
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 9616 0 0 0 30880 341 0 0 25 0 1 0 285529728 49655808 9563 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134525751 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 12123 9563 48 102 0 12018 0
Current children cumulated CPU time (s) 312.21
Current children cumulated vsize (KiB) 48492

[startup+312.502 s]
/proc/loadavg: 0.99 0.98 0.99 2/65 14594
/proc/meminfo: memFree=1489560/2055920 swapFree=4183092/4192956
[pid=14593] ppid=14591 vsize=45936 CPUtime=312.4
/proc/14593/stat : 14593 (picosat) R 14591 14593 13667 0 -1 4194304 9617 0 0 0 30899 341 0 0 25 0 1 0 285529728 47038464 9011 18446744073709551615 134512640 134931368 4294956640 18446744073709551615 134533842 0 0 4096 0 0 0 0 17 1 0 0
/proc/14593/statm: 11484 9011 48 102 0 11379 0
Current children cumulated CPU time (s) 312.4
Current children cumulated vsize (KiB) 45936

Child status: 20
Real time (s): 312.531
CPU time (s): 312.447
CPU user time (s): 309.021
CPU system time (s): 3.42548
CPU usage (%): 99.973
Max. virtual memory (cumulated for all children) (KiB): 48492

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 309.021
system time used= 3.42548
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 9618
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= 488

runsolver used 0.25996 second user time and 0.606907 second system time

The end

Launcher Data (download as text)

Begin job on node68 on Wed Feb 28 09:42:01 UTC 2007

IDJOB= 315542
IDBENCH= 20419
IDSOLVER= 106
FILE ID= node68/315542-1172655721

PBS_JOBID= 3981197

Free space on /tmp= 66478 MiB

SOLVER NAME= picosat 535
BENCH NAME= HOME/pub/bench/SAT07/industrial/palacios/uts/uts-l06-ipc5-h31-unknown.cnf
COMMAND LINE= /tmp/evaluation/315542-1172655721/picosat /tmp/evaluation/315542-1172655721/instance-315542-1172655721.cnf            
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node68/watcher-315542-1172655721 -o ROOT/results/node68/solver-315542-1172655721 -C 1200 -W 2400 -M 1800 --output-limit 1,15  /tmp/evaluation/315542-1172655721/picosat /tmp/evaluation/315542-1172655721/instance-315542-1172655721.cnf            

META MD5SUM SOLVER= 1cb12d44dc66ecc4d20a168f5cfd1323
MD5SUM BENCH=  4211c3af8594e6cbb06d7f7e8978c614

RANDOM SEED= 547052366

TIME LIMIT= 1200 seconds
MEMORY LIMIT= 1800 MiB

Linux node68.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		: 3000.234
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		: 3000.234
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:       1528312 kB
Buffers:         26704 kB
Cached:         449380 kB
SwapCached:       3588 kB
Active:         110120 kB
Inactive:       375380 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1528312 kB
SwapTotal:     4192956 kB
SwapFree:      4183092 kB
Dirty:           14316 kB
Writeback:           0 kB
Mapped:          15364 kB
Slab:            28204 kB
Committed_AS:   776272 kB
PageTables:       1380 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= 66478 MiB

End job on node68 on Wed Feb 28 09:47:14 UTC 2007