Trace number 1045545

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
cpHydra k_10SAT 20.4259 20.873

DiagnosticValue
ASSIGNMENTS0
CHECKS13585

General information on the benchmark

Namecsp/marc/
normalized-large-96-sat_ext.xml
MD5SUM0832422d3adb16f478d8772816d8e677
Bench Category2-ARY-EXT (binary constraints in extension)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark18.7701
Satisfiable
(Un)Satisfiability was proved
Number of variables96
Number of constraints4560
Maximum constraint arity2
Maximum domain size96
Number of constraints which are defined in extension4560
Number of constraints which are defined in intension0
Global constraints used (with number of constraints)

Solver Data (download as text)

0.00/0.00	c cpHydra_k_10 version 0.0
20.35/20.87	c mistral-prime version 1.313
20.35/20.87	s SATISFIABLE
20.35/20.87	v 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
20.35/20.87	d CHECKS 13585
20.35/20.87	d ASSIGNMENTS 0

Verifier Data (download as text)

OK

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-1045545-1215023471/watcher-1045545-1215023471 -o /tmp/evaluation-result-1045545-1215023471/solver-1045545-1215023471 -C 1800 -W 2200 -M 900 --output-limit 1,15 HOME/cpHydra_k_10/hydra HOME/instance-1045545-1215023471.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): 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: 2.26 2.08 1.94 4/93 7206
/proc/meminfo: memFree=1550360/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=18572 CPUtime=0
/proc/7206/stat : 7206 (runsolver) R 7204 7206 6716 0 -1 4194368 15 0 0 0 0 0 0 0 21 0 1 0 1981323174 19017728 292 996147200 4194304 4296836 548682068496 18446744073709551615 240472616231 0 0 4096 24578 0 0 0 17 1 0 0
/proc/7206/statm: 4643 292 257 25 0 2626 0

[startup+0.074659 s]
/proc/loadavg: 2.26 2.08 1.94 4/93 7206
/proc/meminfo: memFree=1550360/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 5360

[startup+0.101658 s]
/proc/loadavg: 2.26 2.08 1.94 4/93 7206
/proc/meminfo: memFree=1550360/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 5360

[startup+0.30168 s]
/proc/loadavg: 2.26 2.08 1.94 4/93 7206
/proc/meminfo: memFree=1550360/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 5360

[startup+0.701716 s]
/proc/loadavg: 2.26 2.08 1.94 4/93 7206
/proc/meminfo: memFree=1550360/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 5360

[startup+1.50178 s]
/proc/loadavg: 2.26 2.08 1.94 3/95 7210
/proc/meminfo: memFree=1525704/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
[pid=7210] ppid=7206 vsize=38816 CPUtime=1.43
/proc/7210/stat : 7210 (xsolve) R 7206 7206 6716 0 -1 4194304 8997 0 0 0 138 5 0 0 25 0 1 0 1981323175 39747584 8956 996147200 134512640 135239763 4294956176 18446744073709551615 134524155 0 0 4096 0 0 0 0 17 1 0 0
/proc/7210/statm: 9704 8956 355 177 0 8607 0
Current children cumulated CPU time (s) 1.43
Current children cumulated vsize (KiB) 44176

[startup+3.10293 s]
/proc/loadavg: 2.26 2.08 1.94 3/95 7210
/proc/meminfo: memFree=1500744/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
[pid=7210] ppid=7206 vsize=75880 CPUtime=2.99
/proc/7210/stat : 7210 (xsolve) R 7206 7206 6716 0 -1 4194304 18253 0 0 0 287 12 0 0 25 0 1 0 1981323175 77701120 18212 996147200 134512640 135239763 4294956176 18446744073709551615 134579435 0 0 4096 0 0 0 0 17 1 0 0
/proc/7210/statm: 18970 18212 355 177 0 17873 0
Current children cumulated CPU time (s) 2.99
Current children cumulated vsize (KiB) 81240

[startup+6.30121 s]
/proc/loadavg: 2.40 2.11 1.95 3/95 7210
/proc/meminfo: memFree=1425160/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
[pid=7210] ppid=7206 vsize=150956 CPUtime=6.13
/proc/7210/stat : 7210 (xsolve) R 7206 7206 6716 0 -1 4194304 37049 0 0 0 590 23 0 0 25 0 1 0 1981323175 154578944 37008 996147200 134512640 135239763 4294956176 18446744073709551615 7945876 0 0 4096 0 0 0 0 17 1 0 0
/proc/7210/statm: 37739 37008 355 177 0 36642 0
Current children cumulated CPU time (s) 6.13
Current children cumulated vsize (KiB) 156316

[startup+12.7018 s]
/proc/loadavg: 2.44 2.13 1.96 3/95 7210
/proc/meminfo: memFree=1270856/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
[pid=7210] ppid=7206 vsize=300036 CPUtime=12.4
/proc/7210/stat : 7210 (xsolve) R 7206 7206 6716 0 -1 4194304 74316 0 0 0 1196 44 0 0 25 0 1 0 1981323175 307236864 74275 996147200 134512640 135239763 4294956176 18446744073709551615 134579063 0 0 4096 0 0 0 0 17 1 0 0
/proc/7210/statm: 75009 74275 355 177 0 73912 0
Current children cumulated CPU time (s) 12.4
Current children cumulated vsize (KiB) 305396

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

[startup+15.901 s]
/proc/loadavg: 2.49 2.14 1.96 3/95 7210
/proc/meminfo: memFree=1193800/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
[pid=7210] ppid=7206 vsize=374680 CPUtime=15.55
/proc/7210/stat : 7210 (xsolve) R 7206 7206 6716 0 -1 4194304 92981 0 0 0 1501 54 0 0 25 0 1 0 1981323175 383672320 92940 996147200 134512640 135239763 4294956176 18446744073709551615 134643571 0 0 4096 0 0 0 0 17 1 0 0
/proc/7210/statm: 93670 92940 355 177 0 92573 0
Current children cumulated CPU time (s) 15.55
Current children cumulated vsize (KiB) 380040

[startup+19.1013 s]
/proc/loadavg: 2.45 2.14 1.96 3/95 7210
/proc/meminfo: memFree=1119560/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
[pid=7210] ppid=7206 vsize=445372 CPUtime=18.68
/proc/7210/stat : 7210 (xsolve) R 7206 7206 6716 0 -1 4194304 110653 0 0 0 1807 61 0 0 25 0 1 0 1981323175 456060928 110612 996147200 134512640 135239763 4294956176 18446744073709551615 134944284 0 0 4096 0 0 0 0 17 1 0 0
/proc/7210/statm: 111343 110612 382 177 0 110246 0
Current children cumulated CPU time (s) 18.68
Current children cumulated vsize (KiB) 450732

[startup+19.9024 s]
/proc/loadavg: 2.45 2.14 1.96 3/95 7210
/proc/meminfo: memFree=1108808/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
[pid=7210] ppid=7206 vsize=445640 CPUtime=19.46
/proc/7210/stat : 7210 (xsolve) R 7206 7206 6716 0 -1 4194304 110777 0 0 0 1885 61 0 0 25 0 1 0 1981323175 456335360 110736 996147200 134512640 135239763 4294956176 18446744073709551615 4159148597 0 0 4096 0 0 0 0 17 1 0 0
/proc/7210/statm: 111410 110736 424 177 0 110313 0
Current children cumulated CPU time (s) 19.46
Current children cumulated vsize (KiB) 451000

[startup+20.3024 s]
/proc/loadavg: 2.45 2.14 1.96 3/95 7210
/proc/meminfo: memFree=1108808/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
[pid=7210] ppid=7206 vsize=445640 CPUtime=19.85
/proc/7210/stat : 7210 (xsolve) R 7206 7206 6716 0 -1 4194304 110777 0 0 0 1924 61 0 0 25 0 1 0 1981323175 456335360 110736 996147200 134512640 135239763 4294956176 18446744073709551615 4158664983 0 0 4096 0 0 0 0 17 1 0 0
/proc/7210/statm: 111410 110736 424 177 0 110313 0
Current children cumulated CPU time (s) 19.85
Current children cumulated vsize (KiB) 451000

[startup+20.7025 s]
/proc/loadavg: 2.45 2.14 1.96 3/95 7210
/proc/meminfo: memFree=1108808/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
[pid=7210] ppid=7206 vsize=445640 CPUtime=20.24
/proc/7210/stat : 7210 (xsolve) R 7206 7206 6716 0 -1 4194304 110777 0 0 0 1963 61 0 0 25 0 1 0 1981323175 456335360 110736 996147200 134512640 135239763 4294956176 18446744073709551615 7942259 0 0 4096 0 0 0 0 17 1 0 0
/proc/7210/statm: 111410 110736 424 177 0 110313 0
Current children cumulated CPU time (s) 20.24
Current children cumulated vsize (KiB) 451000

[startup+20.8025 s]
/proc/loadavg: 2.45 2.14 1.96 3/95 7210
/proc/meminfo: memFree=1187784/2055920 swapFree=4180972/4192956
[pid=7206] ppid=7204 vsize=5360 CPUtime=0
/proc/7206/stat : 7206 (hydra) S 7204 7206 6716 0 -1 4194304 330 247 0 0 0 0 0 0 22 0 1 0 1981323174 5488640 236 996147200 4194304 4889804 548682068816 18446744073709551615 240472613700 0 65536 4100 65538 18446744071563356171 0 0 17 1 0 0
/proc/7206/statm: 1340 236 195 169 0 51 0
[pid=7210] ppid=7206 vsize=370552 CPUtime=20.35
/proc/7210/stat : 7210 (xsolve) R 7206 7206 6716 0 -1 4194304 110777 0 0 0 1972 63 0 0 25 0 1 0 1981323175 379445248 90959 996147200 134512640 135239763 4294956176 18446744073709551615 4294960144 0 0 4096 0 0 0 0 17 1 0 0
/proc/7210/statm: 92638 90959 424 177 0 91541 0
Current children cumulated CPU time (s) 20.35
Current children cumulated vsize (KiB) 375912

Child status: 0
Real time (s): 20.873
CPU time (s): 20.4259
CPU user time (s): 19.729
CPU system time (s): 0.696894
CPU usage (%): 97.8582
Max. virtual memory (cumulated for all children) (KiB): 451000

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 19.729
system time used= 0.696894
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 111861
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= 27
involuntary context switches= 879

runsolver used 0.025996 second user time and 0.078987 second system time

The end

Launcher Data (download as text)

Begin job on node15 at 2008-07-02 20:31:25
IDJOB=1045545
IDBENCH=53555
IDSOLVER=365
FILE ID=node15/1045545-1215023471
PBS_JOBID= 7874440
Free space on /tmp= 66412 MiB

SOLVER NAME= cpHydra k_10
BENCH NAME= CPAI08/csp/marc/normalized-large-96-sat_ext.xml
COMMAND LINE= HOME/cpHydra_k_10/hydra BENCHNAME 
RUNSOLVER COMMAND LINE= /home/evaluation/evaluation/pub/bin/runsolver --timestamp -w /tmp/evaluation-result-1045545-1215023471/watcher-1045545-1215023471 -o /tmp/evaluation-result-1045545-1215023471/solver-1045545-1215023471 -C 1800 -W 2200 -M 900 --output-limit 1,15  HOME/cpHydra_k_10/hydra HOME/instance-1045545-1215023471.xml 

TIME LIMIT= 1800 seconds
MEMORY LIMIT= 900 MiB

MD5SUM BENCH= 0832422d3adb16f478d8772816d8e677
RANDOM SEED=586413143

node15.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		: 3000.229
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		: 3000.229
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:       1550840 kB
Buffers:         18712 kB
Cached:         302552 kB
SwapCached:       6020 kB
Active:         373224 kB
Inactive:        56960 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1550840 kB
SwapTotal:     4192956 kB
SwapFree:      4180972 kB
Dirty:          144000 kB
Writeback:           0 kB
Mapped:         125364 kB
Slab:            59328 kB
Committed_AS:  4048160 kB
PageTables:       2364 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= 66388 MiB
End job on node15 at 2008-07-02 20:31:46