Trace number 3266674

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
sattime2011 2011-03-02SAT 1.17482 1.17726

General information on the benchmark

Namecrafted/anton/SRHD-SGI/
srhd-sgi-m27-q225-n25-p30-s70617701.cnf
MD5SUMf04b72eb712a286c5ea50b297461f349
Bench CategoryCRAFTED (crafted instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.32095
Satisfiable
(Un)Satisfiability was proved
Number of variables671
Number of clauses50773
Sum of the clauses size102167
Maximum clause length27
Minimum clause length2
Number of clauses of size 10
Number of clauses of size 250748
Number of clauses of size 30
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 525

Solver Data 

1.09/1.17	c 0 clauses are redundant and removed
1.09/1.17	c 0 vars are fixed and 0 clauses are removed after unit propagation
1.09/1.17	c 0 vars are fixed and 0 clauses are removed after lookahead
1.09/1.17	c initial seed is 545839055
1.09/1.17	c try=1 flip j=447108 walk=390651 seed 545839072
1.09/1.17	c A solution is found
1.09/1.17	s SATISFIABLE
1.09/1.17	v -1 2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 -16 -17 -18 -19 -20 -21 -22 -23 -24 -25 -26 -27 28 -29 -30 -31 -32 -33 -34 -35 -36 -37 -38 -39 -40 -41 -42 -43 -44 -45 -46 -47 -48 -49 -50 -51 -52 -53 -54 -55 -56 -57 58 -59 -60 -61 -62 -63 -64 -65 -66 -67 -68 -69 -70 -71 -72 -73 -74 -75 -76 -77 -78 -79 -80 -81 -82 -83 -84 -85 86 -87 -88 -89 -90 -91 -92 -93 -94 -95 -96 -97 -98 -99 -100 -101 -102 -103 -104 -105 -106 -107 -108 -109 -110 -111 -112 -113 114 -115 -116 -117 -118 -119 -120 -121 -122 -123 -124 -125 -126 -127 -128 -129 -130 -131 -132 -133 -134 -135 -136 -137 -138 -139 -140 -141 142 -143 -144 -145 -146 -147 -148 -149 -150 -151 -152 -153 -154 -155 -156 -157 -158 -159 -160 -161 -162 -163 -164 -165 -166 -167 -168 -169 -170 -171 -172 -173 -174 -175 176 -177 -178 -179 -180 -181 -182 -183 -184 -185 -186 -187 -188 -189 -190 -191 -192 -193 -194 -195 -196 -197 198 -199 -200 -201 -202 -203 -204 -205 -206 -207 -208 -209 -210 -211 -212 -213 -214 -215 -216 -217 -218 -219 -220 -221 -222 -223 -224 -225 226 -227 -228 -229 -230 -231 -232 -233 -234 -235 -236 -237 -238 -239 -240 -241 -242 -243 -244 -245 -246 -247 -248 -249 -250 -251 -252 -253 254 -255 -256 -257 -258 -259 -260 -261 -262 -263 -264 -265 -266 -267 -268 -269 -270 -271 -272 -273 -274 -275 -276 -277 -278 -279 -280 -281 -282 283 -284 -285 -286 -287 -288 -289 -290 -291 -292 -293 -294 -295 -296 -297 -298 -299 -300 -301 -302 -303 -304 -305 -306 -307 -308 309 -310 -311 -312 -313 -314 -315 -316 -317 -318 -319 -320 -321 -322 -323 -324 -325 -326 -327 -328 -329 -330 -331 -332 -333 -334 -335 -336 -337 -338 339 -340 -341 -342 -343 -344 -345 -346 -347 -348 -349 -350 -351 -352 -353 -354 -355 -356 -357 -358 -359 -360 -361 -362 -363 -364 -365 -366 367 -368 -369 -370 -371 -372 -373 -374 -375 -376 -377 -378 -379 -380 -381 -382 -383 -384 -385 -386 -387 -388 -389 -390 -391 -392 -393 -394 395 -396 -397 -398 -399 -400 -401 -402 -403 -404 -405 -406 -407 -408 -409 -410 -411 -412 -413 -414 -415 -416 -417 -418 -419 -420 -421 -422 423 -424 -425 -426 -427 -428 -429 -430 -431 -432 -433 -434 -435 -436 -437 -438 -439 -440 -441 -442 -443 -444 -445 -446 -447 -448 -449 -450 451 -452 -453 -454 -455 -456 -457 -458 -459 -460 -461 -462 -463 -464 -465 -466 -467 -468 -469 -470 -471 -472 -473 -474 -475 -476 -477 -478 479 -480 -481 -482 -483 -484 -485 -486 -487 -488 -489 -490 -491 -492 -493 -494 -495 -496 -497 -498 -499 -500 -501 -502 -503 504 -505 -506 -507 -508 -509 -510 -511 -512 -513 -514 -515 -516 -517 -518 -519 -520 -521 -522 -523 -524 -525 -526 -527 -528 -529 -530 -531 532 -533 -534 -535 -536 -537 -538 -539 -540 -541 -542 -543 -544 -545 -546 -547 -548 -549 -550 -551 -552 -553 -554 -555 -556 -557 -558 -559 560 -561 -562 -563 -564 -565 -566 -567 -568 -569 -570 -571 -572 -573 -574 -575 -576 -577 -578 -579 -580 -581 -582 -583 -584 -585 -586 587 -588 -589 -590 -591 -592 -593 -594 -595 -596 -597 598 -599 -600 -601 -602 -603 -604 -605 -606 -607 -608 -609 -610 -611 -612 -613 -614 -615 -616 -617 -618 -619 -620 -621 -622 -623 -624 -625 -626 -627 -628 -629 -630 -631 -632 -633 -634 -635 -636 -637 -638 -639 -640 -641 -642 643 -644 -645 -646 -647 -648 -649 -650 -651 -652 -653 -654 -655 -656 -657 -658 -659 -660 -661 -662 -663 -664 -665 -666 -667 -668 -669 -670 671 
1.09/1.17	v 0 
1.09/1.17	c Done (mycputime is 1 seconds)

Verifier Data 

OK

Watcher Data 

runsolver Copyright (C) 2010-2011 Olivier ROUSSEL

This is runsolver version 3.3.0 (svn: 935)

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-3266674-1303583715/watcher-3266674-1303583715 -o /tmp/evaluation-result-3266674-1303583715/solver-3266674-1303583715 -C 2400 -W 1300 -M 7680 sattime2011 HOME/instance-3266674-1303583715.cnf 545835598 

running on 2 cores: 4,6

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: 1.56 2.22 2.98 4/181 10025
/proc/meminfo: memFree=23150748/32951124 swapFree=67051468/67111528
[pid=10025] ppid=10023 vsize=1185716 CPUtime=0 cores=4,6
/proc/10025/stat : 10025 (sattime2011) R 10023 10025 9981 0 -1 4194304 323 0 0 0 0 0 0 0 25 0 1 0 469974263 1214173184 267 33554432000 4194304 4230460 140737370363376 18446744073709551615 218370618053 0 0 4096 0 0 0 0 17 4 0 0 0
/proc/10025/statm: 296429 268 100 9 0 293586 0

[startup+0.024773 s]
/proc/loadavg: 1.56 2.22 2.98 4/181 10025
/proc/meminfo: memFree=23150748/32951124 swapFree=67051468/67111528
[pid=10025] ppid=10023 vsize=1189408 CPUtime=0.01 cores=4,6
/proc/10025/stat : 10025 (sattime2011) R 10023 10025 9981 0 -1 4202496 1494 0 0 0 1 0 0 0 25 0 1 0 469974263 1217953792 1437 33554432000 4194304 4230460 140737370363376 18446744073709551615 4207656 0 0 4096 0 0 0 0 17 4 0 0 0
/proc/10025/statm: 297352 1437 103 9 0 294509 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 1189408

[startup+0.100764 s]
/proc/loadavg: 1.56 2.22 2.98 4/181 10025
/proc/meminfo: memFree=23150748/32951124 swapFree=67051468/67111528
[pid=10025] ppid=10023 vsize=1189408 CPUtime=0.09 cores=4,6
/proc/10025/stat : 10025 (sattime2011) R 10023 10025 9981 0 -1 4202496 1494 0 0 0 9 0 0 0 25 0 1 0 469974263 1217953792 1437 33554432000 4194304 4230460 140737370363376 18446744073709551615 4207656 0 0 4096 0 0 0 0 17 4 0 0 0
/proc/10025/statm: 297352 1437 103 9 0 294509 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 1189408

[startup+0.300755 s]
/proc/loadavg: 1.56 2.22 2.98 4/181 10025
/proc/meminfo: memFree=23150748/32951124 swapFree=67051468/67111528
[pid=10025] ppid=10023 vsize=1191392 CPUtime=0.29 cores=4,6
/proc/10025/stat : 10025 (sattime2011) R 10023 10025 9981 0 -1 4202496 2551 0 0 0 29 0 0 0 25 0 1 0 469974263 1219985408 2493 33554432000 4194304 4230460 140737370363376 18446744073709551615 4219861 0 0 4096 0 0 0 0 17 4 0 0 0
/proc/10025/statm: 297848 2493 117 9 0 295005 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 1191392

[startup+0.700694 s]
/proc/loadavg: 1.56 2.22 2.98 4/181 10025
/proc/meminfo: memFree=23150748/32951124 swapFree=67051468/67111528
[pid=10025] ppid=10023 vsize=1191392 CPUtime=0.69 cores=4,6
/proc/10025/stat : 10025 (sattime2011) R 10023 10025 9981 0 -1 4202496 2551 0 0 0 69 0 0 0 25 0 1 0 469974263 1219985408 2493 33554432000 4194304 4230460 140737370363376 18446744073709551615 4219861 0 0 4096 0 0 0 0 17 4 0 0 0
/proc/10025/statm: 297848 2493 117 9 0 295005 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 1191392

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

[startup+1.10662 s]
/proc/loadavg: 1.56 2.22 2.98 5/190 10042
/proc/meminfo: memFree=22944176/32951124 swapFree=67051468/67111528
[pid=10025] ppid=10023 vsize=1191392 CPUtime=1.09 cores=4,6
/proc/10025/stat : 10025 (sattime2011) R 10023 10025 9981 0 -1 4202496 2551 0 0 0 109 0 0 0 25 0 1 0 469974263 1219985408 2493 33554432000 4194304 4230460 140737370363376 18446744073709551615 4220893 0 0 4096 0 0 0 0 17 4 0 0 0
/proc/10025/statm: 297848 2493 117 9 0 295005 0
Current children cumulated CPU time (s) 1.09
Current children cumulated vsize (KiB) 1191392

Child status: 10
Real time (s): 1.17726
CPU time (s): 1.17482
CPU user time (s): 1.16682
CPU system time (s): 0.007998
CPU usage (%): 99.7931
Max. virtual memory (cumulated for all children) (KiB): 1191392

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 1.16682
system time used= 0.007998
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 2555
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= 4
involuntary context switches= 88

runsolver used 0.004999 second user time and 0.007998 second system time

The end

Launcher Data 

Begin job on node101 at 2011-04-23 20:35:15
IDJOB=3266674
IDBENCH=88206
IDSOLVER=1563
FILE ID=node101/3266674-1303583715
RUNJOBID= node101-1303583715-10000
PBS_JOBID= 13150359
Free space on /tmp= 71604 MiB

SOLVER NAME= sattime2011 2011-03-02
BENCH NAME= SAT11/crafted/anton/SRHD-SGI/srhd-sgi-m27-q225-n25-p30-s70617701.cnf
COMMAND LINE= sattime2011 BENCHNAME RANDOMSEED
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3266674-1303583715/watcher-3266674-1303583715 -o /tmp/evaluation-result-3266674-1303583715/solver-3266674-1303583715 -C 2400 -W 1300 -M 7680  sattime2011 HOME/instance-3266674-1303583715.cnf 545835598

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

MD5SUM BENCH= f04b72eb712a286c5ea50b297461f349
RANDOM SEED=545835598

node101.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		: 2666.841
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	: 5333.68
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		: 2666.841
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	: 5226.07
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		: 2666.841
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	: 5332.77
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		: 2666.841
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	: 5332.83
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		: 2666.841
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	: 5332.74
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		: 2666.841
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	: 5332.83
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		: 2666.841
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	: 5332.75
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		: 2666.841
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	: 5332.83
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32951124 kB
MemFree:      23153628 kB
Buffers:       2064552 kB
Cached:        7209644 kB
SwapCached:      33708 kB
Active:        6157408 kB
Inactive:      3165024 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      23153628 kB
SwapTotal:    67111528 kB
SwapFree:     67051468 kB
Dirty:           18408 kB
Writeback:           0 kB
AnonPages:       36192 kB
Mapped:           9004 kB
Slab:           408208 kB
PageTables:       4980 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS:  1397396 kB
VmallocTotal: 34359738367 kB
VmallocUsed:    296008 kB
VmallocChunk: 34359440975 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 71564 MiB
End job on node101 at 2011-04-23 20:35:16