Trace number 3385746
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:
-
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.
-
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.
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CONVERSION SCRIPT DATA (Optionnal)
When a conversion script is used, this section shows the messages that were output by the conversion script.
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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.
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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
General information on the benchmark
Name | random/medium/ unif-k3-r4.26-v500-c2130-S9113894-047.SATISFIABLE.cnf |
MD5SUM | c18e380499d0835f10de248aeec99cf2 |
Bench Category | RANDOM (random instances) |
Best result obtained on this benchmark | SAT |
Best CPU time to get the best result obtained on this benchmark | 0.004999 |
Satisfiable | |
(Un)Satisfiability was proved | |
Number of variables | 500 |
Number of clauses | 2130 |
Sum of the clauses size | 6390 |
Maximum clause length | 3 |
Minimum clause length | 3 |
Number of clauses of size 1 | 0 |
Number of clauses of size 2 | 0 |
Number of clauses of size 3 | 2130 |
Number of clauses of size 4 | 0 |
Number of clauses of size 5 | 0 |
Number of clauses of size over 5 | 0 |
Solver Data
0.34/0.67 c INFO: loaded portfolio from HOME/etc/borg-mix+class.random.pickle
0.34/0.67 c INFO: solving HOME/instance-3385746-1305572870.cnf
0.34/0.67 c INFO: computing task features
0.34/0.68 c INFO: computed variable-clause graph statistics
0.34/0.68 c INFO: computed clause balance statistics
0.42/0.72 c INFO: computed variable balance statistics
0.42/0.75 c INFO: computed small-clause counts
0.42/0.75 c INFO: computed Horn-clause counts
0.42/0.76 c INFO: computed variable graph statistics
0.42/0.76 c INFO: collected features for HOME/instance-3385746-1305572870.cnf in 0.08 s
0.42/0.79 c INFO: running gnovelty+2@0 for 97 with 4999 remaining (b = 0.57)
0.52/0.82 c INFO: running march_hi@0 for 388 with 4999 remaining (b = 0.35)
0.52/0.85 c INFO: running march_hi@0 for 388 with 4999 remaining (b = 0.30)
0.52/0.88 c INFO: running march_hi@0 for 97 with 4999 remaining (b = 0.09)
0.63/0.92 c INFO: running gnovelty+2@0 for 97 with 4999 remaining (b = 0.07)
0.63/0.95 c INFO: running march_hi@0 for 485 with 4999 remaining (b = 0.26)
0.63/0.99 c INFO: running march_hi@0 for 485 with 4999 remaining (b = 0.23)
1.28/1.02 c INFO: running march_hi@0 for 485 with 4999 remaining (b = 0.21)
1.28/1.03 Traceback (most recent call last):
1.28/1.03 File "HOME/solve", line 33, in <module>
1.28/1.03 plac.call(main)
1.28/1.03 File "/home/evaluation/evaluation/tools64/lib/python2.7/site-packages/plac-0.8.1-py2.7.egg/plac_core.py", line 311, in call
1.28/1.03 cmd, result = parser_from(obj).consume(arglist)
1.28/1.03 File "/home/evaluation/evaluation/tools64/lib/python2.7/site-packages/plac-0.8.1-py2.7.egg/plac_core.py", line 192, in consume
1.28/1.03 return cmd, self.func(*(args + varargs + extraopts), **kwargs)
1.28/1.03 File "HOME/borg/build/lib/borg/tools/solve.py", line 84, in main
1.28/1.03 (_, answer, _) = solver(input_path, budget / cores, cores)
1.28/1.03 File "HOME/borg/build/lib/borg/bilevel.py", line 226, in __call__
1.28/1.03 process.die()
1.28/1.03 File "HOME/borg/build/lib/borg/solvers.py", line 185, in die
1.28/1.03 os.kill(self._process.pid, signal.SIGUSR1)
1.28/1.03 OSError: [Errno 3] No such process
Verifier Data
ERROR: Unexpected answer ! (SATISFIABLE/UNSATISFIABLE expected)
Got answer: <no 's ' line found>
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-3385746-1305572870/watcher-3385746-1305572870 -o /tmp/evaluation-result-3385746-1305572870/solver-3385746-1305572870 -C 40000 -W 5100 -M 31000 python HOME/solve HOME/etc/borg-mix+class.random.pickle HOME/instance-3385746-1305572870.cnf -seed 242786953 -budget 40000 -cores 8
running on 8 cores: 0,2,4,6,1,3,5,7
Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 40000 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 40030 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 5100 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 31744000 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 31795200 KiB
Current StackSize limit: 10240 KiB
[startup+0 s]
/proc/loadavg: 9.99 9.69 9.40 2/409 25194
/proc/meminfo: memFree=20564732/32950928 swapFree=62959404/67111528
[pid=25194] ppid=25192 vsize=15908 CPUtime=0 cores=0-7
/proc/25194/stat : 25194 (python) S 25192 25194 24145 0 -1 4202496 957 0 0 0 0 0 0 0 17 0 1 0 124896483 16289792 834 33554432000 4194304 5683644 140737082850832 18446744073709551615 218880563200 0 2147483391 16781312 2 18446744071699199166 0 0 17 2 0 0 0
/proc/25194/statm: 3977 834 357 364 0 464 0
[startup+0.074893 s]
/proc/loadavg: 9.99 9.69 9.40 2/409 25194
/proc/meminfo: memFree=20564732/32950928 swapFree=62959404/67111528
[pid=25194] ppid=25192 vsize=38904 CPUtime=0.03 cores=0-7
/proc/25194/stat : 25194 (python) R 25192 25194 24145 0 -1 4202496 1657 0 0 0 3 0 0 0 17 0 1 0 124896483 39837696 1486 33554432000 4194304 5683644 140737082850832 18446744073709551615 218880563200 0 2147483391 16781312 2 0 0 0 17 2 0 0 0
/proc/25194/statm: 9726 1486 455 364 0 1026 0
Current children cumulated CPU time (s) 0.03
Current children cumulated vsize (KiB) 38904
[startup+0.10089 s]
/proc/loadavg: 9.99 9.69 9.40 2/409 25194
/proc/meminfo: memFree=20564732/32950928 swapFree=62959404/67111528
[pid=25194] ppid=25192 vsize=87704 CPUtime=0.05 cores=0-7
/proc/25194/stat : 25194 (python) S 25192 25194 24145 0 -1 4202496 2636 0 0 0 4 1 0 0 17 0 1 0 124896483 89808896 2354 33554432000 4194304 5683644 140737082850832 18446744073709551615 218880563200 0 2147483391 16781312 2 18446744071699199166 0 0 17 2 0 0 0
/proc/25194/statm: 21926 2354 717 364 0 1622 0
Current children cumulated CPU time (s) 0.05
Current children cumulated vsize (KiB) 87704
[startup+0.300872 s]
/proc/loadavg: 9.99 9.69 9.40 2/409 25194
/proc/meminfo: memFree=20564732/32950928 swapFree=62959404/67111528
[pid=25194] ppid=25192 vsize=135752 CPUtime=0.19 cores=0-7
/proc/25194/stat : 25194 (python) R 25192 25194 24145 0 -1 4202496 5962 930 1 0 15 4 0 0 18 0 1 0 124896483 139010048 4151 33554432000 4194304 5683644 140737082850832 18446744073709551615 218880561157 0 0 16781312 2 0 0 0 17 2 0 0 0
/proc/25194/statm: 33938 4151 1032 364 0 3124 0
Current children cumulated CPU time (s) 0.19
Current children cumulated vsize (KiB) 135752
[startup+0.700779 s]
/proc/loadavg: 9.99 9.69 9.40 2/409 25194
/proc/meminfo: memFree=20564732/32950928 swapFree=62959404/67111528
[pid=25194] ppid=25192 vsize=278300 CPUtime=0.42 cores=0-7
/proc/25194/stat : 25194 (python) R 25192 25194 24145 0 -1 4202496 9321 930 1 0 33 9 0 0 17 0 1 0 124896483 284979200 6992 33554432000 4194304 5683644 140737082850832 18446744073709551615 4567033 0 0 16781312 2 0 0 0 17 2 0 0 0
/proc/25194/statm: 69575 6992 1826 364 0 5499 0
Current children cumulated CPU time (s) 0.42
Current children cumulated vsize (KiB) 278300
[startup+1.50066 s]
/proc/loadavg: 9.99 9.69 9.40 8/427 25222
/proc/meminfo: memFree=20519452/32950928 swapFree=62959404/67111528
[pid=25194] ppid=25192 vsize=375136 CPUtime=1.37 cores=0-7
/proc/25194/stat : 25194 (python) S 25192 25194 24145 0 -1 4202496 15928 10860 1 0 64 11 59 3 18 0 1 0 124896483 384139264 7339 33554432000 4194304 5683644 140737082850832 18446744073709551615 218892395327 0 0 16781312 2 18446744071562232103 0 0 17 2 0 0 0
/proc/25194/statm: 93784 7339 1891 364 0 29681 0
[pid=25220] ppid=25194 vsize=340320 CPUtime=0 cores=0-7
/proc/25220/stat : 25220 (python) S 25194 25194 24145 0 -1 4202560 785 0 0 0 0 0 0 0 16 0 1 0 124896582 348487680 5635 33554432000 4194304 5683644 140737082850832 18446744073709551615 218880585286 0 0 16781312 514 11678665068857229570 0 0 17 7 0 0 0
/proc/25220/statm: 85080 5635 348 364 0 20980 0
[pid=25222] ppid=25220 vsize=2316 CPUtime=0.49 cores=0-7
/proc/25222/stat : 25222 (march_hi) R 25220 25222 25222 0 -1 4202496 646 0 0 0 49 0 0 0 23 0 1 0 124896582 2371584 382 33554432000 4194304 4955518 140733926615216 18446744073709551615 4209701 0 0 16781312 0 0 0 0 17 2 0 0 0
/proc/25222/statm: 579 382 104 186 0 392 0
Current children cumulated CPU time (s) 1.86
Current children cumulated vsize (KiB) 717772
Solver just ended. Dumping a history of the last processes samples
[startup+1.70061 s]
/proc/loadavg: 9.99 9.69 9.40 8/427 25222
/proc/meminfo: memFree=20519452/32950928 swapFree=62959404/67111528
[pid=25194] ppid=25192 vsize=375136 CPUtime=1.37 cores=0-7
/proc/25194/stat : 25194 (python) S 25192 25194 24145 0 -1 4202496 15928 10860 1 0 64 11 59 3 18 0 1 0 124896483 384139264 7339 33554432000 4194304 5683644 140737082850832 18446744073709551615 218892395327 0 0 16781312 2 18446744071562232103 0 0 17 2 0 0 0
/proc/25194/statm: 93784 7339 1891 364 0 29681 0
[pid=25220] ppid=25194 vsize=340320 CPUtime=0 cores=0-7
/proc/25220/stat : 25220 (python) S 25194 25194 24145 0 -1 4202560 785 0 0 0 0 0 0 0 15 0 1 0 124896582 348487680 5635 33554432000 4194304 5683644 140737082850832 18446744073709551615 218880585286 0 0 16781312 514 11678665068857229570 0 0 17 7 0 0 0
/proc/25220/statm: 85080 5635 348 364 0 20980 0
[pid=25222] ppid=25220 vsize=2316 CPUtime=0.69 cores=0-7
/proc/25222/stat : 25222 (march_hi) R 25220 25222 25222 0 -1 4202496 656 0 0 0 69 0 0 0 24 0 1 0 124896582 2371584 392 33554432000 4194304 4955518 140733926615216 18446744073709551615 4227824 0 0 16781312 0 0 0 0 17 2 0 0 0
/proc/25222/statm: 579 392 104 186 0 392 0
Current children cumulated CPU time (s) 2.06
Current children cumulated vsize (KiB) 717772
Child status: 1
Real time (s): 1.76856
CPU time (s): 2.15167
CPU user time (s): 1.9957
CPU system time (s): 0.155976
CPU usage (%): 121.662
Max. virtual memory (cumulated for all children) (KiB): 1996016
getrusage(RUSAGE_CHILDREN,...) data:
user time used= 1.9957
system time used= 0.155976
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 32795
page faults= 1
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 3275
involuntary context switches= 82
runsolver used 0.009998 second user time and 0.021996 second system time
The end
Launcher Data
Begin job on node112 at 2011-05-16 21:07:51
IDJOB=3385746
IDBENCH=83011
IDSOLVER=1870
FILE ID=node112/3385746-1305572870
RUNJOBID= node112-1305564965-24159
PBS_JOBID= 13350138
Free space on /tmp= 73492 MiB
SOLVER NAME= borg-sat 11.03.02-par-random (fixed)
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v500-c2130-S9113894-047.SATISFIABLE.cnf
COMMAND LINE= python DIR/solve DIR/etc/borg-mix+class.random.pickle BENCHNAME -seed RANDOMSEED -budget TIMEOUT -cores NBCORE
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3385746-1305572870/watcher-3385746-1305572870 -o /tmp/evaluation-result-3385746-1305572870/solver-3385746-1305572870 -C 40000 -W 5100 -M 31000 python HOME/solve HOME/etc/borg-mix+class.random.pickle HOME/instance-3385746-1305572870.cnf -seed 242786953 -budget 40000 -cores 8
TIME LIMIT= 40000 seconds
MEMORY LIMIT= 31000 MiB
NBCORE= 8
MD5SUM BENCH= c18e380499d0835f10de248aeec99cf2
RANDOM SEED=242786953
node112.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 : 2666.847
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 : 5333.69
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 : 2666.847
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 : 5180.45
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 : 2666.847
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 : 5332.76
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 : 2666.847
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 : 5332.82
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 : 2666.847
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 : 5332.61
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 : 2666.847
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 : 5332.83
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 : 2666.847
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 : 5332.74
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 : 2666.847
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 : 5332.83
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: [8]
/proc/meminfo:
MemTotal: 32950928 kB
MemFree: 20565012 kB
Buffers: 64724 kB
Cached: 429664 kB
SwapCached: 73604 kB
Active: 735064 kB
Inactive: 11440000 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 32950928 kB
LowFree: 20565012 kB
SwapTotal: 67111528 kB
SwapFree: 62959404 kB
Dirty: 31708 kB
Writeback: 0 kB
AnonPages: 11615352 kB
Mapped: 22972 kB
Slab: 79280 kB
PageTables: 58864 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 83586992 kB
Committed_AS: 99071360 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= 73460 MiB
End job on node112 at 2011-05-16 21:07:53