Trace number 1098312

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
MDG-probe 2008-06-27UNSAT 125.95 126.985

DiagnosticValue
ASSIGNMENTS996864
CHECKS512723000

General information on the benchmark

Namecsp/rand-2-40-19/
normalized-rand-2-40-19-443-230-30_ext.xml
MD5SUMa8087ab4fdea1161a30b7e461efff528
Bench Category2-ARY-EXT (binary constraints in extension)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark116.132
Satisfiable
(Un)Satisfiability was proved
Number of variables40
Number of constraints334
Maximum constraint arity2
Maximum domain size19
Number of constraints which are defined in extension334
Number of constraints which are defined in intension0
Global constraints used (with number of constraints)

Solver Data (download as text)

0.18/0.21	c mistral-prime version 1.313
0.18/0.21	c 
0.18/0.21	c Parsing xml file
0.18/0.21	c          domains...............     0	(1 domains)
0.18/0.21	c          variables.............     0	(40 variables)
0.18/0.21	c          relations.............  0.03	(334 relations)
0.18/0.21	c          constraints...........  0.01	(334 constraints)
0.18/0.21	c Parsing time:   0.04
0.18/0.21	c
0.18/0.21	c Building model
0.18/0.21	c         0 constants
0.18/0.21	c         0 Boolean variables    (+0)
0.18/0.21	c         0 range variables      (+0)
0.18/0.21	c         0 domain (b) variables (+0)
0.18/0.21	c        40 domain (l) variables (+0)
0.18/0.21	c       334 constraints          (+0)
0.18/0.21	c         0 values 
0.18/0.21	c Building time:      0
0.18/0.21	c
0.18/0.21	c Solving instance
0.18/0.21	c          heuristic = dom/wdeg
0.18/0.21	c          Randomized probing iteration = 100
0.18/0.21	c          probing limit = 30
0.18/0.21	c          level based weights = no
0.18/0.21	c          impact probing = no
0.18/0.21	c          restart policy = No restart
0.18/0.21	c          probing ..........  0.29
0.28/0.34	c          Probing Nodes  3683
0.28/0.34	c          final run 125.62
125.86/126.98	c Solving time: 125.91
125.86/126.98	c
125.86/126.98	s UNSATISFIABLE
125.86/126.98	d CHECKS 512723088
125.86/126.98	d ASSIGNMENTS 996864

Verifier Data (download as text)

No possible verification on an UNSAT instance

Watcher Data (download as text)

runsolver version 3.2.5 (c) roussel@cril.univ-artois.fr

command line: /home/evaluation/evaluation/pub/bin/runsolver --timestamp -w /tmp/evaluation-result-1098312-1215283186/watcher-1098312-1215283186 -o /tmp/evaluation-result-1098312-1215283186/solver-1098312-1215283186 -C 1800 -W 2200 -M 900 --output-limit 1,15 HOME/xsolve HOME/instance-1098312-1215283186.xml -v 1 -rs 340403971 -probe 1 -ph 0 -heu dom/wdeg -res no 

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): 2200 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
Solver output will be limited to a maximum of 15728640 bytes. The first 1048576 bytes and the last 14680064 bytes will be preserved
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 2.00 2.00 2.00 4/81 2079
/proc/meminfo: memFree=1735120/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=820 CPUtime=0
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 39 0 0 0 0 0 0 0 19 0 1 0 2007293177 839680 25 996147200 134512640 135239859 4294956144 18446744073709551615 7205668 0 2147483391 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 205 25 19 177 0 3 0

[startup+0.108706 s]
/proc/loadavg: 2.00 2.00 2.00 4/81 2079
/proc/meminfo: memFree=1735120/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=0.1
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 833 0 0 0 10 0 0 0 18 0 1 0 2007293177 6053888 799 996147200 134512640 135239859 4294956144 18446744073709551615 134821260 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 799 409 177 0 381 0
Current children cumulated CPU time (s) 0.1
Current children cumulated vsize (KiB) 5912

[startup+0.201682 s]
/proc/loadavg: 2.00 2.00 2.00 4/81 2079
/proc/meminfo: memFree=1735120/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=0.18
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 833 0 0 0 18 0 0 0 18 0 1 0 2007293177 6053888 799 996147200 134512640 135239859 4294956144 18446744073709551615 135103136 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 799 409 177 0 381 0
Current children cumulated CPU time (s) 0.18
Current children cumulated vsize (KiB) 5912

[startup+0.301654 s]
/proc/loadavg: 2.00 2.00 2.00 4/81 2079
/proc/meminfo: memFree=1735120/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=0.28
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 833 0 0 0 28 0 0 0 19 0 1 0 2007293177 6053888 799 996147200 134512640 135239859 4294956144 18446744073709551615 135095793 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 799 409 177 0 381 0
Current children cumulated CPU time (s) 0.28
Current children cumulated vsize (KiB) 5912

[startup+0.70155 s]
/proc/loadavg: 2.00 2.00 2.00 4/81 2079
/proc/meminfo: memFree=1735120/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=0.68
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 68 0 0 0 23 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135087453 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 0.68
Current children cumulated vsize (KiB) 5912

[startup+1.50134 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733448/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=1.47
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 147 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135030995 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 1.47
Current children cumulated vsize (KiB) 5912

[startup+3.10193 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733320/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=3.07
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 307 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135015804 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 3.07
Current children cumulated vsize (KiB) 5912

[startup+6.30109 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733256/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=6.24
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 624 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135103178 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 6.24
Current children cumulated vsize (KiB) 5912

[startup+12.7014 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733128/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=12.59
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 1259 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135095798 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 12.59
Current children cumulated vsize (KiB) 5912

[startup+25.5011 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733192/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=25.28
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 2528 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135030995 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 25.28
Current children cumulated vsize (KiB) 5912

[startup+51.1014 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733192/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=50.67
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 5067 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135031006 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 50.67
Current children cumulated vsize (KiB) 5912

[startup+102.301 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733128/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=101.46
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 10146 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135015804 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 101.46
Current children cumulated vsize (KiB) 5912

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

[startup+102.406 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733128/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=101.56
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 10156 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135019216 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 101.56
Current children cumulated vsize (KiB) 5912

[startup+115.202 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733064/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=114.25
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 11425 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135031006 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 114.25
Current children cumulated vsize (KiB) 5912

[startup+121.601 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733064/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=120.6
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 12060 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135103158 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 120.6
Current children cumulated vsize (KiB) 5912

[startup+124.801 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733064/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=123.77
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 12377 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135103178 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 123.77
Current children cumulated vsize (KiB) 5912

[startup+125.601 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733064/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=124.56
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 12456 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 134789755 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 124.56
Current children cumulated vsize (KiB) 5912

[startup+126.402 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733064/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=125.36
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 12536 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135013763 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 125.36
Current children cumulated vsize (KiB) 5912

[startup+126.802 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733064/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=125.76
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 12576 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 134821139 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 125.76
Current children cumulated vsize (KiB) 5912

[startup+126.902 s]
/proc/loadavg: 2.00 2.00 2.00 3/82 2080
/proc/meminfo: memFree=1733064/2055920 swapFree=4180124/4192956
[pid=2079] ppid=2077 vsize=5912 CPUtime=125.86
/proc/2079/stat : 2079 (xsolve) R 2077 2079 31941 0 -1 4194304 835 0 0 0 12586 0 0 0 25 0 1 0 2007293177 6053888 801 996147200 134512640 135239859 4294956144 18446744073709551615 135103188 0 0 4096 0 0 0 0 17 1 0 0
/proc/2079/statm: 1478 801 411 177 0 381 0
Current children cumulated CPU time (s) 125.86
Current children cumulated vsize (KiB) 5912

Child status: 0
Real time (s): 126.985
CPU time (s): 125.95
CPU user time (s): 125.944
CPU system time (s): 0.005999
CPU usage (%): 99.1845
Max. virtual memory (cumulated for all children) (KiB): 5912

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 125.944
system time used= 0.005999
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 847
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= 7
involuntary context switches= 5085

runsolver used 0.151976 second user time and 0.318951 second system time

The end

Launcher Data (download as text)

Begin job on node16 at 2008-07-05 20:39:46
IDJOB=1098312
IDBENCH=59618
IDSOLVER=342
FILE ID=node16/1098312-1215283186
PBS_JOBID= 7882240
Free space on /tmp= 66524 MiB

SOLVER NAME= MDG-probe 2008-06-27
BENCH NAME= CPAI08/csp/rand-2-40-19/normalized-rand-2-40-19-443-230-30_ext.xml
COMMAND LINE= HOME/xsolve BENCHNAME -v 1 -rs RANDOMSEED -probe 1 -ph 0 -heu dom/wdeg -res no
RUNSOLVER COMMAND LINE= /home/evaluation/evaluation/pub/bin/runsolver --timestamp -w /tmp/evaluation-result-1098312-1215283186/watcher-1098312-1215283186 -o /tmp/evaluation-result-1098312-1215283186/solver-1098312-1215283186 -C 1800 -W 2200 -M 900 --output-limit 1,15  HOME/xsolve HOME/instance-1098312-1215283186.xml -v 1 -rs 340403971 -probe 1 -ph 0 -heu dom/wdeg -res no

TIME LIMIT= 1800 seconds
MEMORY LIMIT= 900 MiB

MD5SUM BENCH= a8087ab4fdea1161a30b7e461efff528
RANDOM SEED=340403971

node16.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		: 3000.213
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		: 3000.213
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	: 5586.94
clflush size	: 64
cache_alignment	: 128
address sizes	: 36 bits physical, 48 bits virtual
power management:


/proc/meminfo:
MemTotal:      2055920 kB
MemFree:       1735536 kB
Buffers:         50428 kB
Cached:         195680 kB
SwapCached:       7056 kB
Active:         174928 kB
Inactive:        93580 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1735536 kB
SwapTotal:     4192956 kB
SwapFree:      4180124 kB
Dirty:            1180 kB
Writeback:           0 kB
Mapped:          38064 kB
Slab:            37024 kB
Committed_AS:  3574480 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= 66524 MiB
End job on node16 at 2008-07-05 20:41:53