Trace number 3159818

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
synit_sat 2011-03-03UNSAT 7.16891 7.17239

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v250-c1065-S534787376-095.UNKNOWN.cnf
MD5SUM30a6e61471a22008cda0ff7e2d23efa4
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.251961
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

0.00/0.01	c start  0 total 0
0.00/0.01	c Find Units :          0
0.00/0.01	c Find Invs  :          0
0.00/0.01	c Find Ands  :          0 AvgFaninNum: nan
0.00/0.01	c Find Xors  :          0 AvgFaninNum: nan
0.00/0.01	c Find Ite   :          0
0.00/0.01	c UnDirect variable: 0
0.00/0.01	c UnDirect to Direct Gate: 0
0.00/0.01	c Forced Direct Gate: 0 Unuse unDirect Gate: 0
0.00/0.01	c Break Cycle : 0
0.00/0.01	c Total Root : 0 Undef Var: 250
0.00/0.01	c After covering, Total Root: 0 Leaf: 0
0.00/0.01	c Variable( cover/uncovered/unused ): 0 250 0
0.00/0.01	c Unit Clauses: 0
0.00/0.01	c Binary Clauses( cover/uncovered ): 0 0
0.00/0.01	c Clauses( cover/uncovered ): 0 1065
0.00/0.01	c Total Clauses( cover/uncovered ): 0 1065 0%
0.00/0.01	c Covered Ands: 0 Invs: 0 Xors: 0 Ites: 0
0.00/0.01	c Uncover Clauses avg size: 3 max size: 3
0.00/0.01	c Final circuit: i/l/o/s     250       0    1065      2123
0.00/0.01	c cover rate 0
0.00/0.01	c rocky end  0 total 0
0.00/0.01	c covering time  0 total 0
7.09/7.17	c solve time  7.16 total 7.16
7.09/7.17	s UNSATISFIABLE 

Verifier Data

No possible verification on an UNSAT instance

Watcher Data

runsolver Copyright (C) 2010 Olivier ROUSSEL

This is runsolver version 3.3.0 (svn: 893)

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-3159818-1301736971/watcher-3159818-1301736971 -o /tmp/evaluation-result-3159818-1301736971/solver-3159818-1301736971 -C 2400 -W 1300 -M 7680 HOME/synit_sat HOME/instance-3159818-1301736971.cnf 1993295038 

running on 2 cores: 0,2

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: 4.03 4.02 3.92 4/185 16977
/proc/meminfo: memFree=20896928/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=29204 CPUtime=0 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 1345 0 0 0 0 0 0 0 25 0 1 0 285295772 29904896 1284 33554432000 4194304 4947581 140734157434288 18446744073709551615 242970244155 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/16977/statm: 7301 1295 277 184 0 2176 0

[startup+0.0716799 s]
/proc/loadavg: 4.03 4.02 3.92 4/185 16977
/proc/meminfo: memFree=20896928/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=40952 CPUtime=0.06 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 2691 0 0 0 6 0 0 0 25 0 1 0 285295772 41934848 2625 33554432000 4194304 4947581 140734157434288 18446744073709551615 242970246649 0 0 4096 24578 0 0 0 17 0 0 0 0
/proc/16977/statm: 10238 2625 456 184 0 5113 0
Current children cumulated CPU time (s) 0.06
Current children cumulated vsize (KiB) 40952

[startup+0.100652 s]
/proc/loadavg: 4.03 4.02 3.92 4/185 16977
/proc/meminfo: memFree=20896928/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=40952 CPUtime=0.09 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 2722 0 0 0 9 0 0 0 25 0 1 0 285295772 41934848 2656 33554432000 4194304 4947581 140734157434288 18446744073709551615 4420744 0 0 4096 24578 0 0 0 17 0 0 0 0
/proc/16977/statm: 10238 2656 456 184 0 5113 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 40952

[startup+0.300643 s]
/proc/loadavg: 4.03 4.02 3.92 4/185 16977
/proc/meminfo: memFree=20896928/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=49328 CPUtime=0.29 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 2930 0 0 0 29 0 0 0 25 0 1 0 285295772 50511872 2864 33554432000 4194304 4947581 140734157434288 18446744073709551615 4399717 0 0 4096 24578 0 0 0 17 0 0 0 0
/proc/16977/statm: 12332 2864 456 184 0 7207 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 49328

[startup+0.700571 s]
/proc/loadavg: 4.03 4.02 3.92 4/185 16977
/proc/meminfo: memFree=20896928/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=66388 CPUtime=0.69 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 3300 0 0 0 69 0 0 0 25 0 1 0 285295772 67981312 3234 33554432000 4194304 4947581 140734157434288 18446744073709551615 4350984 0 0 4096 24578 0 0 0 17 0 0 0 0
/proc/16977/statm: 16597 3234 456 184 0 11472 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 66388

[startup+1.50042 s]
/proc/loadavg: 3.94 4.00 3.91 5/188 17005
/proc/meminfo: memFree=20876552/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=66388 CPUtime=1.48 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 4499 0 0 0 148 0 0 0 25 0 1 0 285295772 67981312 4433 33554432000 4194304 4947581 140734157434288 18446744073709551615 4400307 0 0 4096 24578 0 0 0 17 0 0 0 0
/proc/16977/statm: 16597 4433 465 184 0 11472 0
Current children cumulated CPU time (s) 1.48
Current children cumulated vsize (KiB) 66388

[startup+3.27515 s]
/proc/loadavg: 3.94 4.00 3.91 5/188 17005
/proc/meminfo: memFree=20857440/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=92544 CPUtime=3.27 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 5737 0 0 0 326 1 0 0 25 0 1 0 285295772 94765056 5670 33554432000 4194304 4947581 140734157434288 18446744073709551615 4399850 0 0 4096 24578 0 0 0 17 0 0 0 0
/proc/16977/statm: 23136 5670 465 184 0 18011 0
Current children cumulated CPU time (s) 3.27
Current children cumulated vsize (KiB) 92544

[startup+6.30057 s]
/proc/loadavg: 3.94 4.00 3.91 5/188 17005
/proc/meminfo: memFree=20845176/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=92544 CPUtime=6.29 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 6480 0 0 0 628 1 0 0 25 0 1 0 285295772 94765056 6413 33554432000 4194304 4947581 140734157434288 18446744073709551615 4399411 0 0 4096 24578 0 0 0 17 0 0 0 0
/proc/16977/statm: 23136 6413 469 184 0 18011 0
Current children cumulated CPU time (s) 6.29
Current children cumulated vsize (KiB) 92544

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

[startup+6.50657 s]
/proc/loadavg: 3.95 4.00 3.91 5/188 17005
/proc/meminfo: memFree=20842992/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=92544 CPUtime=6.49 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 6520 0 0 0 648 1 0 0 25 0 1 0 285295772 94765056 6453 33554432000 4194304 4947581 140734157434288 18446744073709551615 4400027 0 0 4096 24578 0 0 0 17 0 0 0 0
/proc/16977/statm: 23136 6453 469 184 0 18011 0
Current children cumulated CPU time (s) 6.49
Current children cumulated vsize (KiB) 92544

[startup+6.90049 s]
/proc/loadavg: 3.95 4.00 3.91 5/188 17005
/proc/meminfo: memFree=20842992/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=92544 CPUtime=6.89 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 6526 0 0 0 688 1 0 0 25 0 1 0 285295772 94765056 6459 33554432000 4194304 4947581 140734157434288 18446744073709551615 4399760 0 0 4096 24578 0 0 0 17 0 0 0 0
/proc/16977/statm: 23136 6459 469 184 0 18011 0
Current children cumulated CPU time (s) 6.89
Current children cumulated vsize (KiB) 92544

[startup+7.10045 s]
/proc/loadavg: 3.95 4.00 3.91 5/188 17005
/proc/meminfo: memFree=20842992/32951132 swapFree=67111528/67111528
[pid=16977] ppid=16975 vsize=92544 CPUtime=7.09 cores=0,2
/proc/16977/stat : 16977 (synit_sat) R 16975 16977 16493 0 -1 4202496 6526 0 0 0 708 1 0 0 25 0 1 0 285295772 94765056 6459 33554432000 4194304 4947581 140734157434288 18446744073709551615 4399453 0 0 4096 24578 0 0 0 17 0 0 0 0
/proc/16977/statm: 23136 6459 469 184 0 18011 0
Current children cumulated CPU time (s) 7.09
Current children cumulated vsize (KiB) 92544

Child status: 0
Real time (s): 7.17239
CPU time (s): 7.16891
CPU user time (s): 7.15291
CPU system time (s): 0.015997
CPU usage (%): 99.9515
Max. virtual memory (cumulated for all children) (KiB): 92544

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 7.15291
system time used= 0.015997
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 6532
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= 10
involuntary context switches= 8

runsolver used 0.184971 second user time and 0.371943 second system time

The end

Launcher Data

Begin job on node128 at 2011-04-02 11:36:11
IDJOB=3159818
IDBENCH=82841
IDSOLVER=1571
FILE ID=node128/3159818-1301736971
RUNJOBID= node128-1301733063-16511
PBS_JOBID= 12840941
Free space on /tmp= 71120 MiB

SOLVER NAME= synit_sat 2011-03-03
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v250-c1065-S534787376-095.UNKNOWN.cnf
COMMAND LINE= HOME/synit_sat BENCHNAME RANDOMSEED
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3159818-1301736971/watcher-3159818-1301736971 -o /tmp/evaluation-result-3159818-1301736971/solver-3159818-1301736971 -C 2400 -W 1300 -M 7680  HOME/synit_sat HOME/instance-3159818-1301736971.cnf 1993295038

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

MD5SUM BENCH= 30a6e61471a22008cda0ff7e2d23efa4
RANDOM SEED=1993295038

node128.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		: 2666.852
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	: 5333.70
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		: 2666.852
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	: 5332.75
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		: 2666.852
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		: 2666.852
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		: 2666.852
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	: 5332.82
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		: 2666.852
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	: 5332.75
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		: 2666.852
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		: 2666.852
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	: 5434.49
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32951132 kB
MemFree:      20896952 kB
Buffers:        339956 kB
Cached:       10970516 kB
SwapCached:          0 kB
Active:        8284272 kB
Inactive:      3493372 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951132 kB
LowFree:      20896952 kB
SwapTotal:    67111528 kB
SwapFree:     67111528 kB
Dirty:            2360 kB
Writeback:           0 kB
AnonPages:      467044 kB
Mapped:          16756 kB
Slab:           213236 kB
PageTables:       6380 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587092 kB
Committed_AS:   883088 kB
VmallocTotal: 34359738367 kB
VmallocUsed:    296000 kB
VmallocChunk: 34359440975 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 71120 MiB
End job on node128 at 2011-04-02 11:36:18