Trace number 2676128

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
borg-pb 10.05.30UNSAT 9.75252 9.58648

General information on the benchmark

Namenormalized-PB06/SATUNSAT-SMALLINT/submitted-PB06/
namasivayam/tsp/normalized-t3002.11tsp11.1900570242.opb
MD5SUM490d573a1d39845890b306c349815f34
Bench CategoryDEC-SMALLINT (no optimisation, small integers)
Best result obtained on this benchmarkUNSAT
Best value of the objective obtained on this benchmark
Best CPU time to get the best result obtained on this benchmark9.75252
Has Objective FunctionNO
SatisfiableNO
(Un)Satisfiability was provedYES
Best value of the objective function
Optimality of the best value was proved
Number of variables231
Total number of constraints2707
Number of constraints which are clauses2684
Number of constraints which are cardinality constraints (but not clauses)22
Number of constraints which are nor clauses,nor cardinality constraints1
Minimum length of a constraint2
Maximum length of a constraint110
Number of terms in the objective function 0
Biggest coefficient in the objective function 0
Number of bits for the biggest coefficient in the objective function 0
Sum of the numbers in the objective function 0
Number of bits of the sum of numbers in the objective function 0
Biggest number in a constraint 25
Number of bits of the biggest number in a constraint 5
Biggest sum of numbers in a constraint 749
Number of bits of the biggest sum of numbers10
Number of products (including duplicates)0
Sum of products size (including duplicates)0
Number of different products0
Sum of products size0

Solver Data 

1.08/1.44	c DEBUG: probabilities of action success (DCM model):
1.08/1.44	c        pb/competition_2010/bsolo_pb10-l1   : 0.2446 0.3106 0.3432 0.4493 0.5331 0.5649 0.6331
1.08/1.44	c        pb/competition_2010/bsolo_pb10-l2   : 0.2220 0.2840 0.3077 0.3819 0.4261 0.4617 0.5493
1.08/1.44	c        pb/competition_2010/bsolo_pb10-l3   : 0.2079 0.2803 0.3237 0.4112 0.4599 0.4979 0.5927
1.08/1.44	c        pb/competition_2010/wbo1.4a         : 0.3403 0.4826 0.5859 0.7308 0.8018 0.8464 0.9114
1.08/1.44	c        pb/competition_2010/wbo1.4b         : 0.2130 0.3046 0.4491 0.6693 0.7698 0.8150 0.8796
1.08/1.44	c        pb/other/clasp-1.3.3                : 0.4078 0.5945 0.6711 0.8373 0.8906 0.9054 0.9586
1.08/1.44	c        pb/other/sat4j-pb-v20090829         : 0.2634 0.4175 0.5149 0.6419 0.7125 0.7655 0.8315
1.08/1.44	c        pb/other/sat4j-pb-v20090829-cutting : 0.2190 0.3670 0.4173 0.5593 0.5959 0.6405 0.7110
1.08/1.47	c DETAIL: running [u'HOME/etc/solvers/other/clasp-1.3.3/clasp-1.3.3-x86-linux', u'--seed=261040409', u'HOME/instance-2676128-1277134588.opb'] for 0:00:10
9.64/9.52	s UNSATISFIABLE

Verifier Data 

ERROR: no interpretation found !

Watcher Data 

runsolver version 3.2.9 (svn:492) (c) roussel@cril.univ-artois.fr

command line: BIN/runsolver --timestamp -w /tmp/evaluation-result-2676128-1277134588/watcher-2676128-1277134588 -o /tmp/evaluation-result-2676128-1277134588/solver-2676128-1277134588 -C 1800 -W 2000 -M 1800 solver HOME/instance-2676128-1277134588.opb 2125844894 

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 1800 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 1830 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 2000 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
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 0.34 0.31 0.59 3/106 11650
/proc/meminfo: memFree=1531300/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=16712 CPUtime=0
/proc/11650/stat : 11650 (python) R 11648 11650 11453 0 -1 4202496 760 0 0 0 0 0 0 0 18 0 1 0 54751613 17113088 523 1992294400 4194304 4196484 140735872042672 18446744073709551615 255180165044 0 0 16781312 2 0 0 0 17 0 0 0 0
/proc/11650/statm: 4178 523 281 1 0 274 0

[startup+0.107994 s]
/proc/loadavg: 0.34 0.31 0.59 3/106 11650
/proc/meminfo: memFree=1531300/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=32152 CPUtime=0.08
/proc/11650/stat : 11650 (python) S 11648 11650 11453 0 -1 4202496 2415 0 0 0 6 2 0 0 16 0 1 0 54751613 32923648 1389 1992294400 4194304 4196484 140735946850112 18446744073709551615 255180167168 0 2147483391 16781312 2 18446744071699379390 0 0 17 1 0 0 0
/proc/11650/statm: 8038 1389 459 1 0 910 0
Current children cumulated CPU time (s) 0.08
Current children cumulated vsize (KiB) 32152

[startup+0.201989 s]
/proc/loadavg: 0.34 0.31 0.59 3/106 11650
/proc/meminfo: memFree=1531300/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=54320 CPUtime=0.15
/proc/11650/stat : 11650 (python) S 11648 11650 11453 0 -1 4202496 3208 0 0 0 10 5 0 0 15 0 1 0 54751613 55623680 2091 1992294400 4194304 4196484 140735946850112 18446744073709551615 255180167168 0 2147483391 16781312 2 18446744071699379390 0 0 17 1 0 0 0
/proc/11650/statm: 13580 2091 565 1 0 1480 0
Current children cumulated CPU time (s) 0.15
Current children cumulated vsize (KiB) 54320

[startup+0.300983 s]
/proc/loadavg: 0.34 0.31 0.59 3/106 11650
/proc/meminfo: memFree=1531300/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=70588 CPUtime=0.23
/proc/11650/stat : 11650 (python) S 11648 11650 11453 0 -1 4202496 3905 0 0 0 16 7 0 0 16 0 1 0 54751613 72282112 2743 1992294400 4194304 4196484 140735946850112 18446744073709551615 255180167168 0 2147483391 16781312 2 18446744071699379390 0 0 17 1 0 0 0
/proc/11650/statm: 17648 2748 673 1 0 2135 0
Current children cumulated CPU time (s) 0.23
Current children cumulated vsize (KiB) 70588

[startup+0.705592 s]
/proc/loadavg: 0.34 0.31 0.59 3/106 11650
/proc/meminfo: memFree=1531300/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=99624 CPUtime=0.59
/proc/11650/stat : 11650 (python) R 11648 11650 11453 0 -1 4202496 5093 0 0 0 38 21 0 0 15 0 1 0 54751613 102014976 3771 1992294400 4194304 4196484 140735946850112 18446744073709551615 255179829957 0 0 16781312 2 0 0 0 17 1 0 0 0
/proc/11650/statm: 24906 3771 1023 1 0 2763 0
Current children cumulated CPU time (s) 0.59
Current children cumulated vsize (KiB) 99624

[startup+1.50171 s]
/proc/loadavg: 0.34 0.31 0.59 3/107 11655
/proc/meminfo: memFree=1511452/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=132044 CPUtime=1.18
/proc/11650/stat : 11650 (python) R 11648 11650 11453 0 -1 4202496 10243 928 0 0 85 33 0 0 17 0 1 0 54751613 135213056 6305 1992294400 4194304 4196484 140735946850112 18446744073709551615 255179863001 0 0 16781312 2 0 0 0 17 1 0 0 0
/proc/11650/statm: 33012 6305 1133 1 0 5164 0
Current children cumulated CPU time (s) 1.18
Current children cumulated vsize (KiB) 132044

[startup+3.10093 s]
/proc/loadavg: 0.34 0.31 0.59 2/108 11656
/proc/meminfo: memFree=1509460/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=132044 CPUtime=1.3
/proc/11650/stat : 11650 (python) S 11648 11650 11453 0 -1 4202496 10259 928 0 0 95 35 0 0 15 0 1 0 54751613 135213056 6305 1992294400 4194304 4196484 140735946850112 18446744073709551615 255180189199 0 0 16781312 2 159836005329808149 0 0 17 1 0 0 0
/proc/11650/statm: 33011 6305 1133 1 0 5163 0
[pid=11656] ppid=11650 vsize=2328 CPUtime=1.6
/proc/11656/stat : 11656 (clasp-1.3.3-x86) R 11650 11656 11656 0 -1 4202496 660 0 0 0 160 0 0 0 20 0 1 0 54751760 2383872 342 1992294400 134512640 136080129 4289075248 18446744073709551615 134610270 0 0 16781312 16386 0 0 0 17 0 0 0 0
/proc/11656/statm: 582 342 175 383 0 197 0
Current children cumulated CPU time (s) 2.9
Current children cumulated vsize (KiB) 134372

[startup+6.30138 s]
/proc/loadavg: 0.39 0.32 0.59 2/108 11656
/proc/meminfo: memFree=1508344/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=132044 CPUtime=1.48
/proc/11650/stat : 11650 (python) S 11648 11650 11453 0 -1 4202496 10269 928 0 0 111 37 0 0 15 0 1 0 54751613 135213056 6305 1992294400 4194304 4196484 140735946850112 18446744073709551615 255180189199 0 0 16781312 2 159836005329808149 0 0 17 1 0 0 0
/proc/11650/statm: 33011 6305 1133 1 0 5163 0
[pid=11656] ppid=11650 vsize=2732 CPUtime=4.78
/proc/11656/stat : 11656 (clasp-1.3.3-x86) R 11650 11656 11656 0 -1 4202496 751 0 0 0 478 0 0 0 25 0 1 0 54751760 2797568 433 1992294400 134512640 136080129 4289075248 18446744073709551615 134849991 0 0 16781312 16386 0 0 0 17 0 0 0 0
/proc/11656/statm: 683 433 175 383 0 298 0
Current children cumulated CPU time (s) 6.26
Current children cumulated vsize (KiB) 134776

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

[startup+6.4014 s]
/proc/loadavg: 0.39 0.32 0.59 2/108 11656
/proc/meminfo: memFree=1508344/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=132044 CPUtime=1.52
/proc/11650/stat : 11650 (python) S 11648 11650 11453 0 -1 4202496 10270 928 0 0 114 38 0 0 15 0 1 0 54751613 135213056 6305 1992294400 4194304 4196484 140735946850112 18446744073709551615 255180189199 0 0 16781312 2 159836005329808149 0 0 17 1 0 0 0
/proc/11650/statm: 33011 6305 1133 1 0 5163 0
[pid=11656] ppid=11650 vsize=2732 CPUtime=4.88
/proc/11656/stat : 11656 (clasp-1.3.3-x86) R 11650 11656 11656 0 -1 4202496 752 0 0 0 488 0 0 0 25 0 1 0 54751760 2797568 434 1992294400 134512640 136080129 4289075248 18446744073709551615 134849599 0 0 16781312 16386 0 0 0 17 0 0 0 0
/proc/11656/statm: 683 434 175 383 0 298 0
Current children cumulated CPU time (s) 6.4
Current children cumulated vsize (KiB) 134776

[startup+8.00063 s]
/proc/loadavg: 0.39 0.32 0.59 2/108 11656
/proc/meminfo: memFree=1508344/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=132044 CPUtime=1.62
/proc/11650/stat : 11650 (python) S 11648 11650 11453 0 -1 4202496 10276 928 0 0 123 39 0 0 15 0 1 0 54751613 135213056 6305 1992294400 4194304 4196484 140735946850112 18446744073709551615 255180189199 0 0 16781312 2 159836005329808149 0 0 17 1 0 0 0
/proc/11650/statm: 33011 6305 1133 1 0 5163 0
[pid=11656] ppid=11650 vsize=2864 CPUtime=6.46
/proc/11656/stat : 11656 (clasp-1.3.3-x86) R 11650 11656 11656 0 -1 4202496 774 0 0 0 646 0 0 0 25 0 1 0 54751760 2932736 456 1992294400 134512640 136080129 4289075248 18446744073709551615 134804910 0 0 16781312 16386 0 0 0 17 0 0 0 0
/proc/11656/statm: 716 456 175 383 0 331 0
Current children cumulated CPU time (s) 8.08
Current children cumulated vsize (KiB) 134908

[startup+8.80074 s]
/proc/loadavg: 0.39 0.32 0.59 2/108 11656
/proc/meminfo: memFree=1508220/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=132044 CPUtime=1.64
/proc/11650/stat : 11650 (python) S 11648 11650 11453 0 -1 4202496 10277 928 0 0 125 39 0 0 15 0 1 0 54751613 135213056 6305 1992294400 4194304 4196484 140735946850112 18446744073709551615 255180189199 0 0 16781312 2 159836005329808149 0 0 17 1 0 0 0
/proc/11650/statm: 33011 6305 1133 1 0 5163 0
[pid=11656] ppid=11650 vsize=2864 CPUtime=7.27
/proc/11656/stat : 11656 (clasp-1.3.3-x86) R 11650 11656 11656 0 -1 4202496 791 0 0 0 727 0 0 0 25 0 1 0 54751760 2932736 473 1992294400 134512640 136080129 4289075248 18446744073709551615 134849710 0 0 16781312 16386 0 0 0 17 1 0 0 0
/proc/11656/statm: 716 473 175 383 0 331 0
Current children cumulated CPU time (s) 8.91
Current children cumulated vsize (KiB) 134908

[startup+9.2008 s]
/proc/loadavg: 0.39 0.32 0.59 2/108 11656
/proc/meminfo: memFree=1508220/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=132044 CPUtime=1.67
/proc/11650/stat : 11650 (python) S 11648 11650 11453 0 -1 4202496 10278 928 0 0 128 39 0 0 15 0 1 0 54751613 135213056 6305 1992294400 4194304 4196484 140735946850112 18446744073709551615 255180189199 0 0 16781312 2 159836005329808149 0 0 17 1 0 0 0
/proc/11650/statm: 33011 6305 1133 1 0 5163 0
[pid=11656] ppid=11650 vsize=2864 CPUtime=7.66
/proc/11656/stat : 11656 (clasp-1.3.3-x86) R 11650 11656 11656 0 -1 4202496 793 0 0 0 766 0 0 0 25 0 1 0 54751760 2932736 475 1992294400 134512640 136080129 4289075248 18446744073709551615 134610270 0 0 16781312 16386 0 0 0 17 0 0 0 0
/proc/11656/statm: 716 475 175 383 0 331 0
Current children cumulated CPU time (s) 9.33
Current children cumulated vsize (KiB) 134908

[startup+9.40083 s]
/proc/loadavg: 0.39 0.32 0.59 2/108 11656
/proc/meminfo: memFree=1508220/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=132044 CPUtime=1.69
/proc/11650/stat : 11650 (python) R 11648 11650 11453 0 -1 4202496 10279 928 0 0 129 40 0 0 15 0 1 0 54751613 135213056 6305 1992294400 4194304 4196484 140735946850112 18446744073709551615 255180212359 0 0 16781312 2 0 0 0 17 1 0 0 0
/proc/11650/statm: 33011 6305 1133 1 0 5163 0
[pid=11656] ppid=11650 vsize=0 CPUtime=7.85
/proc/11656/stat : 11656 (clasp-1.3.3-x86) Z 11650 11656 11656 0 -1 4202524 809 0 0 0 785 0 0 0 25 0 1 0 54751760 0 0 1992294400 0 0 0 0 0 0 0 16781312 16386 18446744073709551615 0 0 17 0 0 0 0
/proc/11656/statm: 0 0 0 0 0 0 0
Current children cumulated CPU time (s) 9.54
Current children cumulated vsize (KiB) 132044

[startup+9.50085 s]
/proc/loadavg: 0.39 0.32 0.59 2/108 11656
/proc/meminfo: memFree=1508220/2059040 swapFree=4164960/4192956
[pid=11650] ppid=11648 vsize=134104 CPUtime=9.64
/proc/11650/stat : 11650 (python) S 11648 11650 11453 0 -1 4202496 10474 1737 0 0 137 41 785 1 17 0 1 0 54751613 137322496 6308 1992294400 4194304 4196484 140735946850112 18446744073709551615 255191999237 0 0 16781312 2 18446744071562232103 0 0 17 1 0 0 0
/proc/11650/statm: 33526 6308 1135 1 0 5163 0
Current children cumulated CPU time (s) 9.64
Current children cumulated vsize (KiB) 134104

Child status: 20
Real time (s): 9.58648
CPU time (s): 9.75252
CPU user time (s): 9.29159
CPU system time (s): 0.460929
CPU usage (%): 101.732
Max. virtual memory (cumulated for all children) (KiB): 134908

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 9.29159
system time used= 0.460929
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 17920
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= 1697
involuntary context switches= 154

runsolver used 0.017997 second user time and 0.050992 second system time

The end

Launcher Data 

Begin job on node039 at 2010-06-21 17:36:28
IDJOB=2676128
IDBENCH=1324
IDSOLVER=1178
FILE ID=node039/2676128-1277134588
PBS_JOBID= 11182084
Free space on /tmp= 62512 MiB

SOLVER NAME= borg-pb 10.05.30
BENCH NAME= PB06//final/normalized-PB06/SATUNSAT-SMALLINT/submitted-PB06/namasivayam/tsp/normalized-t3002.11tsp11.1900570242.opb
COMMAND LINE= solver BENCHNAME RANDOMSEED 
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-2676128-1277134588/watcher-2676128-1277134588 -o /tmp/evaluation-result-2676128-1277134588/solver-2676128-1277134588 -C 1800 -W 2000 -M 1800  solver HOME/instance-2676128-1277134588.opb 2125844894 

TIME LIMIT= 1800 seconds
MEMORY LIMIT= 1800 MiB
MAX NB THREAD= 0

MD5SUM BENCH= 490d573a1d39845890b306c349815f34
RANDOM SEED=2125844894

node039.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	: 15
model		: 4
model name	:                   Intel(R) Xeon(TM) CPU 3.00GHz
stepping	: 3
cpu MHz		: 3000.267
cache size	: 2048 KB
physical id	: 0
siblings	: 1
core id		: 0
cpu cores	: 1
apicid		: 0
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 constant_tsc pni monitor ds_cpl cid cx16 xtpr
bogomips	: 6000.53
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		: 3000.267
cache size	: 2048 KB
physical id	: 3
siblings	: 1
core id		: 0
cpu cores	: 1
apicid		: 6
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 constant_tsc pni monitor ds_cpl cid cx16 xtpr
bogomips	: 5599.45
clflush size	: 64
cache_alignment	: 128
address sizes	: 36 bits physical, 48 bits virtual
power management:


/proc/meminfo:
MemTotal:      2059040 kB
MemFree:       1531828 kB
Buffers:        121260 kB
Cached:         281404 kB
SwapCached:       1408 kB
Active:         221404 kB
Inactive:       214232 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2059040 kB
LowFree:       1531828 kB
SwapTotal:     4192956 kB
SwapFree:      4164960 kB
Dirty:           23920 kB
Writeback:           0 kB
AnonPages:       31492 kB
Mapped:          14368 kB
Slab:            69880 kB
PageTables:       3936 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:   5222476 kB
Committed_AS:   182848 kB
VmallocTotal: 34359738367 kB
VmallocUsed:    264948 kB
VmallocChunk: 34359471699 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 62492 MiB
End job on node039 at 2010-06-21 17:36:38