Trace number 3222068

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
MPhaseSAT_M 2011-02-16UNSAT 15.1787 15.1802

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v250-c1065-S1822479556-014.UNKNOWN.cnf
MD5SUM0c8d0957d77826a7c24d4ded86c5d721
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.135979
Satisfiable
(Un)Satisfiability was proved
Number of variables250
Number of clauses1065
Sum of the clauses size3195
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 31065
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

15.09/15.17	c MPhaseSAT_M version 401 suited for random catagory by Jingchao Chen,  April 1,2011 
15.09/15.17	c input CNF file=HOME/instance-3222068-1303300592.cnf 
15.09/15.17	c Clause#=1065  var#=250  ratio=4 
15.09/15.17	c Simplified clause#=1065 
15.09/15.17	c XOR_varElimination deleted var#=0 clauses#=1064 
15.09/15.17	c inative var#=0 
15.09/15.17	c free var#=240  
15.09/15.17	c local search on 
15.09/15.17	c 
15.09/15.17	s UNSATISFIABLE
15.09/15.17	c 
15.09/15.17	c  Running time=15.177692

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: 935)

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-3222068-1303300592/watcher-3222068-1303300592 -o /tmp/evaluation-result-3222068-1303300592/solver-3222068-1303300592 -C 5000 -W 5000 -M 15500 MPhaseSAT_M HOME/instance-3222068-1303300592.cnf 

running on 4 cores: 1,3,5,7

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 5000 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 5030 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 5000 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 15872000 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 15923200 KiB
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 2.00 2.00 2.00 2/177 11331
/proc/meminfo: memFree=19180204/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=3184 CPUtime=0 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 359 0 0 0 0 0 0 0 25 0 1 0 520289780 3260416 300 33554432000 134512640 134829744 4292279024 18446744073709551615 134579993 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 796 300 238 78 0 82 0

[startup+0.0312491 s]
/proc/loadavg: 2.00 2.00 2.00 2/177 11331
/proc/meminfo: memFree=19180204/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=3440 CPUtime=0.02 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 434 0 0 0 2 0 0 0 25 0 1 0 520289780 3522560 375 33554432000 134512640 134829744 4292279024 18446744073709551615 6002172 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 860 375 270 78 0 146 0
Current children cumulated CPU time (s) 0.02
Current children cumulated vsize (KiB) 3440

[startup+0.100235 s]
/proc/loadavg: 2.00 2.00 2.00 2/177 11331
/proc/meminfo: memFree=19180204/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=3572 CPUtime=0.09 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 476 0 0 0 9 0 0 0 25 0 1 0 520289780 3657728 417 33554432000 134512640 134829744 4292279024 18446744073709551615 134722439 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 893 417 270 78 0 179 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 3572

[startup+0.300199 s]
/proc/loadavg: 2.00 2.00 2.00 2/177 11331
/proc/meminfo: memFree=19180204/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=3704 CPUtime=0.29 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 531 0 0 0 29 0 0 0 25 0 1 0 520289780 3792896 472 33554432000 134512640 134829744 4292279024 18446744073709551615 134657780 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 926 472 270 78 0 212 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 3704

[startup+0.700124 s]
/proc/loadavg: 2.00 2.00 2.00 2/177 11331
/proc/meminfo: memFree=19180204/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=3968 CPUtime=0.69 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 599 0 0 0 69 0 0 0 25 0 1 0 520289780 4063232 540 33554432000 134512640 134829744 4292279024 18446744073709551615 134605217 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 992 540 273 78 0 278 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 3968

[startup+1.50098 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 11332
/proc/meminfo: memFree=19178964/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=3968 CPUtime=1.49 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 599 0 0 0 149 0 0 0 25 0 1 0 520289780 4063232 540 33554432000 134512640 134829744 4292279024 18446744073709551615 134605882 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 992 540 273 78 0 278 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 3968

[startup+3.10069 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 11332
/proc/meminfo: memFree=19178624/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=3968 CPUtime=3.09 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 599 0 0 0 309 0 0 0 25 0 1 0 520289780 4063232 540 33554432000 134512640 134829744 4292279024 18446744073709551615 134606508 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 992 540 273 78 0 278 0
Current children cumulated CPU time (s) 3.09
Current children cumulated vsize (KiB) 3968

[startup+6.3001 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 11332
/proc/meminfo: memFree=19178108/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=3968 CPUtime=6.29 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 599 0 0 0 629 0 0 0 25 0 1 0 520289780 4063232 540 33554432000 134512640 134829744 4292279024 18446744073709551615 134606109 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 992 540 273 78 0 278 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 3968

[startup+12.7009 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 11332
/proc/meminfo: memFree=19177492/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=4200 CPUtime=12.69 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 638 0 0 0 1269 0 0 0 25 0 1 0 520289780 4300800 579 33554432000 134512640 134829744 4292279024 18446744073709551615 134605893 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 1050 579 273 78 0 336 0
Current children cumulated CPU time (s) 12.69
Current children cumulated vsize (KiB) 4200

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

[startup+14.3056 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 11332
/proc/meminfo: memFree=19177476/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=4200 CPUtime=14.3 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 638 0 0 0 1430 0 0 0 25 0 1 0 520289780 4300800 579 33554432000 134512640 134829744 4292279024 18446744073709551615 134605913 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 1050 579 273 78 0 336 0
Current children cumulated CPU time (s) 14.3
Current children cumulated vsize (KiB) 4200

[startup+14.7006 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 11332
/proc/meminfo: memFree=19177476/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=4200 CPUtime=14.69 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 638 0 0 0 1469 0 0 0 25 0 1 0 520289780 4300800 579 33554432000 134512640 134829744 4292279024 18446744073709551615 134605832 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 1050 579 273 78 0 336 0
Current children cumulated CPU time (s) 14.69
Current children cumulated vsize (KiB) 4200

[startup+15.1005 s]
/proc/loadavg: 2.00 2.00 2.00 3/178 11332
/proc/meminfo: memFree=19177476/32951124 swapFree=67111528/67111528
[pid=11331] ppid=11329 vsize=4200 CPUtime=15.09 cores=1,3,5,7
/proc/11331/stat : 11331 (MPhaseSAT_M) R 11329 11331 10674 0 -1 4202496 638 0 0 0 1509 0 0 0 25 0 1 0 520289780 4300800 579 33554432000 134512640 134829744 4292279024 18446744073709551615 134606576 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/11331/statm: 1050 579 273 78 0 336 0
Current children cumulated CPU time (s) 15.09
Current children cumulated vsize (KiB) 4200

Child status: 20
Real time (s): 15.1802
CPU time (s): 15.1787
CPU user time (s): 15.1777
CPU system time (s): 0.000999
CPU usage (%): 99.9903
Max. virtual memory (cumulated for all children) (KiB): 4200

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 15.1777
system time used= 0.000999
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 648
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= 12
involuntary context switches= 21

runsolver used 0.014997 second user time and 0.055991 second system time

The end

Launcher Data 

Begin job on node110 at 2011-04-20 13:56:32
IDJOB=3222068
IDBENCH=83028
IDSOLVER=1637
FILE ID=node110/3222068-1303300592
RUNJOBID= node110-1303290048-10693
PBS_JOBID= 13049609
Free space on /tmp= 72184 MiB

SOLVER NAME= MPhaseSAT_M 2011-02-16
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v250-c1065-S1822479556-014.UNKNOWN.cnf
COMMAND LINE= MPhaseSAT_M BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3222068-1303300592/watcher-3222068-1303300592 -o /tmp/evaluation-result-3222068-1303300592/solver-3222068-1303300592 -C 5000 -W 5000 -M 15500  MPhaseSAT_M HOME/instance-3222068-1303300592.cnf

TIME LIMIT= 5000 seconds
MEMORY LIMIT= 15500 MiB
NBCORE= 4

MD5SUM BENCH= 0c8d0957d77826a7c24d4ded86c5d721
RANDOM SEED=1696067126

node110.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		: 2666.830
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	: 5333.66
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		: 2666.830
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	: 5332.83
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		: 2666.830
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	: 5332.75
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		: 2666.830
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	: 5332.83
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		: 2666.830
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	: 5332.76
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		: 2666.830
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		: 2666.830
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		: 2666.830
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:     32951124 kB
MemFree:      19180484 kB
Buffers:        701896 kB
Cached:       12599804 kB
SwapCached:          0 kB
Active:        5753624 kB
Inactive:      7637588 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      19180484 kB
SwapTotal:    67111528 kB
SwapFree:     67111528 kB
Dirty:             404 kB
Writeback:           0 kB
AnonPages:       89644 kB
Mapped:          16224 kB
Slab:           316308 kB
PageTables:       4776 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS:   238304 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= 72184 MiB
End job on node110 at 2011-04-20 13:56:47