Trace number 2096502

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
Abscon 112v4 ESACSAT 1.70274 1.78442

DiagnosticValue
CHECKS1200
NODES125

General information on the benchmark

Namecsp/modifiedRenault/
normalized-renault-mod-13_ext.xml
MD5SUM6fadd9d7447cc10bc8ba0b5dd4087fca
Bench CategoryN-ARY-EXT (n-ary constraints in extension)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.410937
Satisfiable
(Un)Satisfiability was proved
Number of variables111
Number of constraints149
Maximum constraint arity10
Maximum domain size42
Number of constraints which are defined in extension149
Number of constraints which are defined in intension0
Global constraints used (with number of constraints)

Solver Data

0.05/0.08	
0.05/0.08	Abscon 112 (May, 2008)
0.18/0.24	
0.18/0.24	   configuration
0.18/0.24	     name=esac.xml
0.18/0.28	   
0.18/0.28	   instance
0.18/0.28	     name=HOME/instance-2096502-1247410374.xml
0.28/0.31	   
0.28/0.31	   domains being loaded...
0.28/0.32	   
0.28/0.32	   variables being loaded...
0.28/0.36	     nbVariables=111  nbDomainTypes=15  minDomainSize=2  maxDomainSize=42  nbTotalValues=562
0.28/0.36	       =>  wckTime=0.116  cpuTime=0.11  mem=7M892
0.28/0.36	   
0.28/0.36	   relations being loaded...
0.77/0.84	   
0.77/0.84	   constraints being loaded...
1.07/1.14	     nbConstraints=131  nbRelationTypes=132  nbGlobalConstraints=100  nbMergedConstraints=21  nbExtensionStructures=121
1.07/1.14	     nbSharedExtensionStructures=7  nbConflictsStructures=121  nbSharedConflictsStructures=7
1.07/1.14	     nbSharedBinaryRepresentations=416  minDegree=1  maxDegree=80  minArity=2  avgArity=4.69  maxArity=10
1.07/1.14	     nbGenerators=3  nbFusions=0  symmetryWckTime=0.072  symmetryCpuTime=0.02
1.07/1.14	       =>  wckTime=0.899  cpuTime=0.72  mem=39M608
1.16/1.27	   
1.16/1.27	   solver IterativeSystematicSolver being built... 
1.26/1.34	   
1.26/1.34	   INFO : Forward propagation technique limited 
1.36/1.41	       =>  wckTime=1.166  cpuTime=0.84  mem=41M79
1.56/1.61	   
1.56/1.61	   preprocessing
1.56/1.61	     nbConstraintChecks=550  nbValidityChecks=1787133  nbPropagations=550  nbRevisions=209  nbUselessRevisions=185
1.56/1.61	     nbSingletonTests=120  nbEffectiveSingletonTests=0  nbACRemovals=30  nbFoundSingletons=0  nbRemovedValues=30
1.56/1.61	     detectedInconsistency=no
1.56/1.61	       =>  wckTime=0.199  cpuTime=0.18  mem=41M79
1.66/1.71	   
1.66/1.72	   search
1.66/1.72	     run=0  nbConstraintChecks=650  nbValidityChecks=483102  minDepth=12  maxDepth=111  nbPropagations=869
1.66/1.72	     nbRevisions=326  nbUselessRevisions=289  nbAssignments=125  nbFailedAssignments=6  nbInferredBacktracks=1
1.66/1.72	     nbBacktracks=8  nbVisitedNodes=133  nbRestartNogoods=0  nbFoundSolutions=1  mapSize=2  nbInferences=0
1.66/1.72	     nbTooLargeKeys=0  nbSEliminables=77.41  nbREliminables=16.21  nbIEliminables=7.51  nbDEliminables=0
1.66/1.72	     nbPEliminables=0
1.66/1.72	       =>  wckTime=0.301  cpuTime=0.24  mem=42M941
1.66/1.72	   
1.66/1.72	   global
1.66/1.72	     nbConstraintChecks=1200  nbValidityChecks=2270235  nbPropagations=1419  nbRevisions=535  nbUselessRevisions=474
1.66/1.72	     nbRestartNogoods=0  solvingWckTime=0.303  solvingCpuTime=0.24  expiredTime=no  totalExploration=no
1.66/1.72	     nbFoundSolutions=1  firstSolutionCpuTime=1.08  globalCpuTime=1.11
1.66/1.72	       =>  wckTime=1.471  cpuTime=1.08  mem=42M941
1.66/1.72	   
1.66/1.72	s SATISFIABLE
1.66/1.72	v 0 1 5 9 1 1 0 3 1 1 1 0 0 2 1 1 1 0 1 2 2 1 1 1 10 2 3 0 0 1 1 0 13 0 0 1 0 1 1 2 0 0 0 1 2 0 4 0 1 3 1 1 2 1 1 9 1 1 1 0 0 1 2 0 1 2 2 0 1 2 0 9 2 2 3 0 1 1 0 1 6 1 0 0 0 1 1 0 0 0 0 2 0 0 0 3 2 4 0 0 3 4 6 9 0 1 7 4 4 3 1 
1.66/1.72	d NODES 125
1.66/1.72	d CHECKS 1200
1.66/1.72	   
1.66/1.72	   totalWckTime=1.537  totalCpuTime=1.11

Verifier Data

OK

Watcher Data

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

command line: BIN/runsolver --timestamp -w /tmp/evaluation-result-2096502-1247410374/watcher-2096502-1247410374 -o /tmp/evaluation-result-2096502-1247410374/solver-2096502-1247410374 -C 1800 -W 2000 -M 900 java -Xms756M -Xmx756M -XX:PermSize=10m -XX:MaxPermSize=10m -cp abscon112V4.jar abscon.Resolution esac.xml 1 XSax HOME/instance-2096502-1247410374.xml 

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): 921600 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 972800 KiB
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 2.08 2.02 1.96 4/81 31984
/proc/meminfo: memFree=1758536/2055920 swapFree=4192812/4192956
[pid=31984] ppid=31982 vsize=18576 CPUtime=0
/proc/31984/stat : 31984 (runsolver) R 31982 31984 30988 0 -1 4194368 16 0 0 0 0 0 0 0 20 0 1 0 28102848 19021824 284 996147200 4194304 4302564 548682068384 18446744073709551615 214945033511 0 2147483391 4096 24578 0 0 0 17 0 0 0
/proc/31984/statm: 4644 284 249 26 0 2626 0

[startup+0.067383 s]
/proc/loadavg: 2.08 2.02 1.96 4/81 31984
/proc/meminfo: memFree=1758536/2055920 swapFree=4192812/4192956
[pid=31984] ppid=31982 vsize=864144 CPUtime=0.05
/proc/31984/stat : 31984 (java) S 31982 31984 30988 0 -1 0 2914 0 1 0 4 1 0 0 21 0 9 0 28102848 884883456 2424 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 0 0 0
/proc/31984/statm: 216036 2424 1150 9 0 210929 0
Current children cumulated CPU time (s) 0.05
Current children cumulated vsize (KiB) 864144

[startup+0.101394 s]
/proc/loadavg: 2.08 2.02 1.96 4/81 31984
/proc/meminfo: memFree=1758536/2055920 swapFree=4192812/4192956
[pid=31984] ppid=31982 vsize=865980 CPUtime=0.08
/proc/31984/stat : 31984 (java) S 31982 31984 30988 0 -1 0 3740 0 1 0 6 2 0 0 21 0 9 0 28102848 886763520 3208 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 0 0 0
/proc/31984/statm: 216495 3208 1700 9 0 210980 0
Current children cumulated CPU time (s) 0.08
Current children cumulated vsize (KiB) 865980

[startup+0.301411 s]
/proc/loadavg: 2.08 2.02 1.96 4/81 31984
/proc/meminfo: memFree=1758536/2055920 swapFree=4192812/4192956
[pid=31984] ppid=31982 vsize=866380 CPUtime=0.28
/proc/31984/stat : 31984 (java) S 31982 31984 30988 0 -1 0 5993 0 1 0 25 3 0 0 21 0 9 0 28102848 887173120 5359 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 0 0 0
/proc/31984/statm: 216595 5359 1986 9 0 211053 0
Current children cumulated CPU time (s) 0.28
Current children cumulated vsize (KiB) 866380

[startup+0.70146 s]
/proc/loadavg: 2.08 2.02 1.96 4/81 31984
/proc/meminfo: memFree=1758536/2055920 swapFree=4192812/4192956
[pid=31984] ppid=31982 vsize=866492 CPUtime=0.67
/proc/31984/stat : 31984 (java) S 31982 31984 30988 0 -1 0 16070 0 1 0 59 8 0 0 21 0 9 0 28102848 887287808 15432 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 0 0 0
/proc/31984/statm: 216623 15432 1998 9 0 211081 0
Current children cumulated CPU time (s) 0.67
Current children cumulated vsize (KiB) 866492

[startup+1.50255 s]
/proc/loadavg: 2.07 2.02 1.96 3/90 31993
/proc/meminfo: memFree=1689856/2055920 swapFree=4192812/4192956
[pid=31984] ppid=31982 vsize=867928 CPUtime=1.46
/proc/31984/stat : 31984 (java) S 31982 31984 30988 0 -1 0 34389 293 1 0 130 15 0 1 21 0 9 0 28102848 888758272 24221 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 0 0 0
/proc/31984/statm: 216982 24221 2662 9 0 211418 0
[pid=31984/tid=31986] ppid=31982 vsize=867928 CPUtime=1.1
/proc/31984/task/31986/stat : 31986 (java) R 31982 31984 30988 0 -1 64 19316 293 1 0 100 9 0 1 25 0 9 0 28102850 888758272 24221 996147200 134512640 134550932 4294955968 18446744073709551615 4126861276 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31987] ppid=31982 vsize=867928 CPUtime=0.16
/proc/31984/task/31987/stat : 31987 (java) S 31982 31984 30988 0 -1 64 13552 293 0 0 12 3 0 1 17 0 9 0 28102851 888758272 24221 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 0 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31988] ppid=31982 vsize=867928 CPUtime=0.01
/proc/31984/task/31988/stat : 31988 (java) S 31982 31984 30988 0 -1 64 19 293 0 0 0 0 0 1 16 0 9 0 28102851 888758272 24221 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31989] ppid=31982 vsize=867928 CPUtime=0.01
/proc/31984/task/31989/stat : 31989 (java) S 31982 31984 30988 0 -1 64 9 293 0 0 0 0 0 1 15 0 9 0 28102851 888758272 24221 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31990] ppid=31982 vsize=867928 CPUtime=0.01
/proc/31984/task/31990/stat : 31990 (java) S 31982 31984 30988 0 -1 64 2 293 0 0 0 0 0 1 25 0 9 0 28102853 888758272 24221 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31991] ppid=31982 vsize=867928 CPUtime=0.18
/proc/31984/task/31991/stat : 31991 (java) S 31982 31984 30988 0 -1 64 679 293 0 0 17 0 0 1 15 0 9 0 28102853 888758272 24221 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31992] ppid=31982 vsize=867928 CPUtime=0.01
/proc/31984/task/31992/stat : 31992 (java) S 31982 31984 30988 0 -1 64 1 293 0 0 0 0 0 1 25 0 9 0 28102853 888758272 24221 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31993] ppid=31982 vsize=867928 CPUtime=0.01
/proc/31984/task/31993/stat : 31993 (java) S 31982 31984 30988 0 -1 64 5 293 0 0 0 0 0 1 15 0 9 0 28102853 888758272 24221 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
Current children cumulated CPU time (s) 1.46
Current children cumulated vsize (KiB) 867928

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

[startup+1.70419 s]
/proc/loadavg: 2.07 2.02 1.96 3/90 31993
/proc/meminfo: memFree=1689856/2055920 swapFree=4192812/4192956
[pid=31984] ppid=31982 vsize=867928 CPUtime=1.66
/proc/31984/stat : 31984 (java) S 31982 31984 30988 0 -1 0 34421 293 1 0 150 15 0 1 21 0 9 0 28102848 888758272 24251 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 0 0 16800975 18446744073709551615 0 0 17 0 0 0
/proc/31984/statm: 216982 24251 2662 9 0 211418 0
[pid=31984/tid=31986] ppid=31982 vsize=867928 CPUtime=1.26
/proc/31984/task/31986/stat : 31986 (java) R 31982 31984 30988 0 -1 64 19327 293 1 0 116 9 0 1 25 0 9 0 28102850 888758272 24251 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31987] ppid=31982 vsize=867928 CPUtime=0.16
/proc/31984/task/31987/stat : 31987 (java) S 31982 31984 30988 0 -1 64 13552 293 0 0 12 3 0 1 17 0 9 0 28102851 888758272 24251 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 0 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31988] ppid=31982 vsize=867928 CPUtime=0.01
/proc/31984/task/31988/stat : 31988 (java) S 31982 31984 30988 0 -1 64 19 293 0 0 0 0 0 1 16 0 9 0 28102851 888758272 24251 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31989] ppid=31982 vsize=867928 CPUtime=0.01
/proc/31984/task/31989/stat : 31989 (java) S 31982 31984 30988 0 -1 64 9 293 0 0 0 0 0 1 15 0 9 0 28102851 888758272 24251 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31990] ppid=31982 vsize=867928 CPUtime=0.01
/proc/31984/task/31990/stat : 31990 (java) S 31982 31984 30988 0 -1 64 2 293 0 0 0 0 0 1 25 0 9 0 28102853 888758272 24251 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31991] ppid=31982 vsize=867928 CPUtime=0.21
/proc/31984/task/31991/stat : 31991 (java) S 31982 31984 30988 0 -1 64 700 293 0 0 20 0 0 1 15 0 9 0 28102853 888758272 24251 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31992] ppid=31982 vsize=867928 CPUtime=0.01
/proc/31984/task/31992/stat : 31992 (java) S 31982 31984 30988 0 -1 64 1 293 0 0 0 0 0 1 25 0 9 0 28102853 888758272 24251 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
[pid=31984/tid=31993] ppid=31982 vsize=867928 CPUtime=0.01
/proc/31984/task/31993/stat : 31993 (java) S 31982 31984 30988 0 -1 64 5 293 0 0 0 0 0 1 15 0 9 0 28102853 888758272 24251 996147200 134512640 134550932 4294955968 18446744073709551615 4294960144 0 4 0 16800975 0 0 0 -1 0 0 0
Current children cumulated CPU time (s) 1.66
Current children cumulated vsize (KiB) 867928

Child status: 0
Real time (s): 1.78442
CPU time (s): 1.70274
CPU user time (s): 1.52477
CPU system time (s): 0.177972
CPU usage (%): 95.4227
Max. virtual memory (cumulated for all children) (KiB): 867928

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 1.52477
system time used= 0.177972
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 34805
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= 1135
involuntary context switches= 1227

runsolver used 0.003999 second user time and 0.014997 second system time

The end

Launcher Data

Begin job on node85 at 2009-07-12 16:52:55
IDJOB=2096502
IDBENCH=56389
IDSOLVER=774
FILE ID=node85/2096502-1247410374
PBS_JOBID= 9510482
Free space on /tmp= 126548 MiB

SOLVER NAME= Abscon 112v4 ESAC
BENCH NAME= CPAI08/csp/modifiedRenault/normalized-renault-mod-13_ext.xml
COMMAND LINE= java -Xms756M -Xmx756M -XX:PermSize=10m -XX:MaxPermSize=10m -cp abscon112V4.jar abscon.Resolution esac.xml 1 XSax BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-2096502-1247410374/watcher-2096502-1247410374 -o /tmp/evaluation-result-2096502-1247410374/solver-2096502-1247410374 -C 1800 -W 2000 -M 900  java -Xms756M -Xmx756M -XX:PermSize=10m -XX:MaxPermSize=10m -cp abscon112V4.jar abscon.Resolution esac.xml 1 XSax HOME/instance-2096502-1247410374.xml

TIME LIMIT= 1800 seconds
MEMORY LIMIT= 900 MiB
MAX NB THREAD= 0

MD5SUM BENCH= 6fadd9d7447cc10bc8ba0b5dd4087fca
RANDOM SEED=1361066308

node85.alineos.net Linux 2.6.9-22.EL.rootsmp #1 SMP Mon Oct 3 08:59:52 CEST 2005

/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		: 3000.220
cache size	: 2048 KB
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 pni monitor ds_cpl cid cx16 xtpr
bogomips	: 5914.62
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		: 3000.220
cache size	: 2048 KB
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 pni monitor ds_cpl cid cx16 xtpr
bogomips	: 5996.54
clflush size	: 64
cache_alignment	: 128
address sizes	: 36 bits physical, 48 bits virtual
power management:


/proc/meminfo:
MemTotal:      2055920 kB
MemFree:       1759016 kB
Buffers:         37816 kB
Cached:         112396 kB
SwapCached:          0 kB
Active:         185656 kB
Inactive:        54844 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1759016 kB
SwapTotal:     4192956 kB
SwapFree:      4192812 kB
Dirty:            5212 kB
Writeback:           0 kB
Mapped:         110580 kB
Slab:            41552 kB
Committed_AS:  1004048 kB
PageTables:       1920 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264952 kB
VmallocChunk: 536605679 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 126548 MiB
End job on node85 at 2009-07-12 16:52:57