Trace number 3375620

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. The first timestamp (if present) is estimated CPU time. The last timestamp is wall clock 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
MPhaseSAT64 2011-05-14 (fixed)UNSAT 13.414 13.4152

General information on the benchmark

Namecrafted/skvortsov/
automata-synchronization/crn_11_99_u.cnf
MD5SUM9ad5e99587f3a7137ad13cd9a8eefafb
Bench CategoryCRAFTED (crafted instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark1.27181
Satisfiable
(Un)Satisfiability was proved
Number of variables1287
Number of clauses2332
Sum of the clauses size6820
Maximum clause length3
Minimum clause length2
Number of clauses of size 10
Number of clauses of size 2176
Number of clauses of size 32156
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

13.39/13.41	c MPhaseSAT64 version 514 by Jingchao Chen,  May 13,2011
13.39/13.41	c input CNF file=HOME/instance-3375620-1305450532.cnf 
13.39/13.41	c Clause#=2332  var#=1287  ratio=1 
13.39/13.41	c Simplified clause#=2332 
13.39/13.41	c XOR_varElimination deleted var#=98 clauses#=2233 
13.39/13.41	c inative var#=0 
13.39/13.41	c free var#=717  
13.39/13.41	c local search off 
13.39/13.41	c height=51 age=36.211070 
13.39/13.41	c 
13.39/13.41	s UNSATISFIABLE
13.39/13.41	c 
13.39/13.41	c  Running time=13.412961

Verifier Data 

No possible verification on an UNSAT instance

Watcher Data 

runsolver Copyright (C) 2010-2011 Olivier ROUSSEL

This is runsolver version 3.3.0 (svn: 961)

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

command line: BIN/runsolver --timestamp -w /tmp/evaluation-result-3375620-1305450532/watcher-3375620-1305450532 -o /tmp/evaluation-result-3375620-1305450532/solver-3375620-1305450532 -C 2400 -W 1300 -M 7680 MPhaseSAT64 HOME/instance-3375620-1305450532.cnf 

running on 2 cores: 5,7

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 2400 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 2430 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 1300 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 7864320 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 7915520 KiB
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 1.90 2.00 2.66 4/336 2909
/proc/meminfo: memFree=24915508/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=12072 CPUtime=0 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 453 0 0 0 0 0 0 0 25 0 1 0 656653682 12361728 391 33554432000 4194304 4479436 140733679086208 18446744073709551615 244446606021 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 3018 391 281 70 0 138 0

[startup+0.0559021 s]
/proc/loadavg: 1.90 2.00 2.66 4/336 2909
/proc/meminfo: memFree=24915508/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=12616 CPUtime=0.05 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 605 0 0 0 5 0 0 0 25 0 1 0 656653682 12918784 543 33554432000 4194304 4479436 140733679086208 18446744073709551615 4355493 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 3154 543 321 70 0 274 0
Current children cumulated CPU time (s) 0.05
Current children cumulated vsize (KiB) 12616

[startup+0.100894 s]
/proc/loadavg: 1.90 2.00 2.66 4/336 2909
/proc/meminfo: memFree=24915508/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=12616 CPUtime=0.09 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 605 0 0 0 9 0 0 0 25 0 1 0 656653682 12918784 543 33554432000 4194304 4479436 140733679086208 18446744073709551615 4312864 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 3154 543 321 70 0 274 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 12616

[startup+0.300842 s]
/proc/loadavg: 1.90 2.00 2.66 4/336 2909
/proc/meminfo: memFree=24915508/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=13480 CPUtime=0.29 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 825 0 0 0 29 0 0 0 25 0 1 0 656653682 13803520 763 33554432000 4194304 4479436 140733679086208 18446744073709551615 4371013 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 3370 763 325 70 0 490 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 13480

[startup+0.700769 s]
/proc/loadavg: 1.90 2.00 2.66 4/336 2909
/proc/meminfo: memFree=24915508/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=15656 CPUtime=0.69 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 1307 0 0 0 69 0 0 0 25 0 1 0 656653682 16031744 1117 33554432000 4194304 4479436 140733679086208 18446744073709551615 4450909 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 3914 1117 326 70 0 1034 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 15656

[startup+1.50062 s]
/proc/loadavg: 1.90 2.00 2.66 5/337 2911
/proc/meminfo: memFree=24901496/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=16532 CPUtime=1.49 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 2254 0 0 0 149 0 0 0 25 0 1 0 656653682 16928768 1307 33554432000 4194304 4479436 140733679086208 18446744073709551615 4451045 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 4133 1307 326 70 0 1253 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 16532

[startup+3.10032 s]
/proc/loadavg: 2.07 2.03 2.66 5/337 2911
/proc/meminfo: memFree=24907084/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=19092 CPUtime=3.09 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 4159 0 0 0 309 0 0 0 25 0 1 0 656653682 19550208 2028 33554432000 4194304 4479436 140733679086208 18446744073709551615 4451088 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 4773 2028 326 70 0 1893 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 19092

[startup+6.30073 s]
/proc/loadavg: 2.07 2.03 2.66 5/337 2911
/proc/meminfo: memFree=24902872/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=20244 CPUtime=6.29 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 5870 0 0 0 629 0 0 0 25 0 1 0 656653682 20729856 2363 33554432000 4194304 4479436 140733679086208 18446744073709551615 4380302 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 5061 2363 331 70 0 2181 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 20244

[startup+12.7005 s]
/proc/loadavg: 2.37 2.10 2.68 5/337 2911
/proc/meminfo: memFree=24881516/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=20884 CPUtime=12.69 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 8238 0 0 0 1268 1 0 0 25 0 1 0 656653682 21385216 2523 33554432000 4194304 4479436 140733679086208 18446744073709551615 4382480 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 5221 2523 331 70 0 2341 0
Current children cumulated CPU time (s) 12.69
Current children cumulated vsize (KiB) 20884

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

[startup+13.1005 s]
/proc/loadavg: 2.37 2.10 2.68 5/337 2911
/proc/meminfo: memFree=24881636/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=20884 CPUtime=13.1 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 8238 0 0 0 1309 1 0 0 25 0 1 0 656653682 21385216 2523 33554432000 4194304 4479436 140733679086208 18446744073709551615 4450996 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 5221 2523 331 70 0 2341 0
Current children cumulated CPU time (s) 13.1
Current children cumulated vsize (KiB) 20884

[startup+13.3004 s]
/proc/loadavg: 2.37 2.10 2.68 5/337 2911
/proc/meminfo: memFree=24881636/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=18836 CPUtime=13.29 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 8238 0 0 0 1328 1 0 0 25 0 1 0 656653682 19288064 2011 33554432000 4194304 4479436 140733679086208 18446744073709551615 4380809 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 4709 2011 331 70 0 1829 0
Current children cumulated CPU time (s) 13.29
Current children cumulated vsize (KiB) 18836

[startup+13.4004 s]
/proc/loadavg: 2.37 2.10 2.68 5/337 2911
/proc/meminfo: memFree=24881636/32951124 swapFree=44485764/67111528
[pid=2909] ppid=2907 vsize=17812 CPUtime=13.39 cores=5,7
/proc/2909/stat : 2909 (MPhaseSAT64) R 2907 2909 1741 0 -1 4202496 8238 0 0 0 1338 1 0 0 25 0 1 0 656653682 18239488 1755 33554432000 4194304 4479436 140733679086208 18446744073709551615 4330580 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/2909/statm: 4453 1755 331 70 0 1573 0
Current children cumulated CPU time (s) 13.39
Current children cumulated vsize (KiB) 17812

Child status: 20
Real time (s): 13.4152
CPU time (s): 13.414
CPU user time (s): 13.399
CPU system time (s): 0.014997
CPU usage (%): 99.9908
Max. virtual memory (cumulated for all children) (KiB): 25492

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 13.399
system time used= 0.014997
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 8240
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= 5
involuntary context switches= 21

runsolver used 0.036994 second user time and 0.114982 second system time

The end

Launcher Data 

Begin job on node105 at 2011-05-15 11:08:52
IDJOB=3375620
IDBENCH=83193
IDSOLVER=1855
FILE ID=node105/3375620-1305450532
RUNJOBID= node105-1305450509-2690
PBS_JOBID= 13324851
Free space on /tmp= 73596 MiB

SOLVER NAME= MPhaseSAT64 2011-05-14 (fixed)
BENCH NAME= SAT11/crafted/skvortsov/automata-synchronization/crn_11_99_u.cnf
COMMAND LINE= MPhaseSAT64 BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3375620-1305450532/watcher-3375620-1305450532 -o /tmp/evaluation-result-3375620-1305450532/solver-3375620-1305450532 -C 2400 -W 1300 -M 7680  MPhaseSAT64 HOME/instance-3375620-1305450532.cnf

TIME LIMIT= 2400 seconds
MEMORY LIMIT= 7680 MiB
NBCORE= 2

MD5SUM BENCH= 9ad5e99587f3a7137ad13cd9a8eefafb
RANDOM SEED=1852175629

node105.alineos.net Linux 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009

/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.825
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5333.65
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.825
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 16
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5226.15
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 2
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.825
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 2
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.82
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.825
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 18
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.75
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 4
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.825
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5410.70
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 5
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.825
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 20
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 6
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.825
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 6
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.82
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]

processor	: 7
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.825
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 22
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
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 rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx est tm2 cx16 xtpr popcnt lahf_lm
bogomips	: 5332.75
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32951124 kB
MemFree:      24915648 kB
Buffers:        293044 kB
Cached:        6119108 kB
SwapCached:      39656 kB
Active:         988560 kB
Inactive:      6784464 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      24915648 kB
SwapTotal:    67111528 kB
SwapFree:     44485764 kB
Dirty:           27420 kB
Writeback:           0 kB
AnonPages:     1329052 kB
Mapped:          11468 kB
Slab:           130552 kB
PageTables:      66784 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS: 65534588 kB
VmallocTotal: 34359738367 kB
VmallocUsed:    296008 kB
VmallocChunk: 34359440975 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 73596 MiB
End job on node105 at 2011-05-15 11:09:06