Trace number 3094563

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
MPhaseSAT 2011-02-15SAT 1.24081 1.24247

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v650-c2769-S466707249-079.SATISFIABLE.cnf
MD5SUM5668e95cadc5ec51544c425c57e1c075
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.049991
Satisfiable
(Un)Satisfiability was proved
Number of variables650
Number of clauses2769
Sum of the clauses size8307
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 32769
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

1.19/1.24	c MPhaseSAT version 401 by Jingchao Chen,  April 1, 2011
1.19/1.24	c input CNF file=HOME/instance-3094563-1301759441.cnf 
1.19/1.24	c Clause#=2769  var#=650  ratio=4 
1.19/1.24	c Simplified clause#=2769 
1.19/1.24	c XOR_varElimination deleted var#=0 clauses#=2760 
1.19/1.24	c inative var#=0 
1.19/1.24	c free var#=629  
1.19/1.24	c local search on 
1.19/1.24	c A solution found by local search 
1.19/1.24	c unfixed var#=19 var#=650 
1.19/1.24	c verified 
1.19/1.24	c 
1.19/1.24	s SATISFIABLE
1.19/1.24	v 1 2 3 4 -5 -6 -7 -8 -9 -10 11 12 13 -15 -16 -17 -18 19 -20 21 22 -23 24 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 -264 266 267 268 -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 -452 454 455 456 -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 -637 638 639 640 641 643 644 645 647 648 649 650 
1.19/1.24	v 0
1.19/1.24	c 
1.19/1.24	c  Running time=1.238811

Verifier Data 

OK

Watcher Data 

runsolver Copyright (C) 2010 Olivier ROUSSEL

This is runsolver version 3.3.0 (svn: 893)

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-3094563-1301759441/watcher-3094563-1301759441 -o /tmp/evaluation-result-3094563-1301759441/solver-3094563-1301759441 -C 2400 -W 1300 -M 7680 MPhaseSAT HOME/instance-3094563-1301759441.cnf 

running on 2 cores: 0,2

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: 4.04 4.04 3.96 4/193 21917
/proc/meminfo: memFree=20528724/32951124 swapFree=67111528/67111528
[pid=21917] ppid=21915 vsize=3036 CPUtime=0 cores=0,2
/proc/21917/stat : 21917 (MPhaseSAT) R 21915 21917 21142 0 -1 4202496 343 0 0 0 0 0 0 0 25 0 1 0 287542220 3108864 281 33554432000 134512640 134731564 4288231920 18446744073709551615 2352636 0 0 4096 1026 0 0 0 17 0 0 0 0
/proc/21917/statm: 759 281 230 54 0 69 0

[startup+0.0201491 s]
/proc/loadavg: 4.04 4.04 3.96 4/193 21917
/proc/meminfo: memFree=20528724/32951124 swapFree=67111528/67111528
[pid=21917] ppid=21915 vsize=3560 CPUtime=0.01 cores=0,2
/proc/21917/stat : 21917 (MPhaseSAT) R 21915 21917 21142 0 -1 4202496 494 0 0 0 1 0 0 0 25 0 1 0 287542220 3645440 431 33554432000 134512640 134731564 4288231920 18446744073709551615 134721817 0 0 4096 1026 0 0 0 17 0 0 0 0
/proc/21917/statm: 890 431 261 54 0 200 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 3560

[startup+0.101152 s]
/proc/loadavg: 4.04 4.04 3.96 4/193 21917
/proc/meminfo: memFree=20528724/32951124 swapFree=67111528/67111528
[pid=21917] ppid=21915 vsize=3824 CPUtime=0.09 cores=0,2
/proc/21917/stat : 21917 (MPhaseSAT) R 21915 21917 21142 0 -1 4202496 566 0 0 0 9 0 0 0 25 0 1 0 287542220 3915776 503 33554432000 134512640 134731564 4288231920 18446744073709551615 134723213 0 0 4096 1026 0 0 0 17 0 0 0 0
/proc/21917/statm: 956 503 269 54 0 266 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 3824

[startup+0.301104 s]
/proc/loadavg: 4.04 4.04 3.96 4/193 21917
/proc/meminfo: memFree=20528724/32951124 swapFree=67111528/67111528
[pid=21917] ppid=21915 vsize=3956 CPUtime=0.29 cores=0,2
/proc/21917/stat : 21917 (MPhaseSAT) R 21915 21917 21142 0 -1 4202496 615 0 0 0 29 0 0 0 25 0 1 0 287542220 4050944 552 33554432000 134512640 134731564 4288231920 18446744073709551615 134659345 0 0 4096 1026 0 0 0 17 0 0 0 0
/proc/21917/statm: 989 552 269 54 0 299 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 3956

[startup+0.701009 s]
/proc/loadavg: 4.04 4.04 3.96 4/193 21917
/proc/meminfo: memFree=20528724/32951124 swapFree=67111528/67111528
[pid=21917] ppid=21915 vsize=4220 CPUtime=0.69 cores=0,2
/proc/21917/stat : 21917 (MPhaseSAT) R 21915 21917 21142 0 -1 4202496 671 0 0 0 69 0 0 0 25 0 1 0 287542220 4321280 608 33554432000 134512640 134731564 4288231920 18446744073709551615 134659554 0 0 4096 1026 0 0 0 17 0 0 0 0
/proc/21917/statm: 1055 608 269 54 0 365 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 4220

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

[startup+1.10596 s]
/proc/loadavg: 4.03 4.04 3.96 5/194 21918
/proc/meminfo: memFree=20527124/32951124 swapFree=67111528/67111528
[pid=21917] ppid=21915 vsize=4616 CPUtime=1.1 cores=0,2
/proc/21917/stat : 21917 (MPhaseSAT) R 21915 21917 21142 0 -1 4202496 769 0 0 0 110 0 0 0 25 0 1 0 287542220 4726784 706 33554432000 134512640 134731564 4288231920 18446744073709551615 134605860 0 0 4096 1026 0 0 0 17 0 0 0 0
/proc/21917/statm: 1154 706 272 54 0 464 0
Current children cumulated CPU time (s) 1.1
Current children cumulated vsize (KiB) 4616

[startup+1.20094 s]
/proc/loadavg: 4.03 4.04 3.96 5/194 21918
/proc/meminfo: memFree=20527124/32951124 swapFree=67111528/67111528
[pid=21917] ppid=21915 vsize=4616 CPUtime=1.19 cores=0,2
/proc/21917/stat : 21917 (MPhaseSAT) R 21915 21917 21142 0 -1 4202496 769 0 0 0 119 0 0 0 25 0 1 0 287542220 4726784 706 33554432000 134512640 134731564 4288231920 18446744073709551615 134605942 0 0 4096 1026 0 0 0 17 0 0 0 0
/proc/21917/statm: 1154 706 272 54 0 464 0
Current children cumulated CPU time (s) 1.19
Current children cumulated vsize (KiB) 4616

Child status: 10
Real time (s): 1.24247
CPU time (s): 1.24081
CPU user time (s): 1.23781
CPU system time (s): 0.002999
CPU usage (%): 99.8662
Max. virtual memory (cumulated for all children) (KiB): 4616

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 1.23781
system time used= 0.002999
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 779
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= 6
involuntary context switches= 15

runsolver used 0.002999 second user time and 0.007998 second system time

The end

Launcher Data 

Begin job on node132 at 2011-04-02 17:50:41
IDJOB=3094563
IDBENCH=83045
IDSOLVER=1520
FILE ID=node132/3094563-1301759441
RUNJOBID= node132-1301757100-21160
PBS_JOBID= 12841076
Free space on /tmp= 72388 MiB

SOLVER NAME= MPhaseSAT 2011-02-15
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v650-c2769-S466707249-079.SATISFIABLE.cnf
COMMAND LINE= MPhaseSAT BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3094563-1301759441/watcher-3094563-1301759441 -o /tmp/evaluation-result-3094563-1301759441/solver-3094563-1301759441 -C 2400 -W 1300 -M 7680  MPhaseSAT HOME/instance-3094563-1301759441.cnf

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

MD5SUM BENCH= 5668e95cadc5ec51544c425c57e1c075
RANDOM SEED=840688971

node132.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		: 2666.833
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	: 5333.66
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		: 2666.833
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	: 5332.74
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		: 2666.833
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	: 5332.76
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		: 2666.833
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	: 5332.75
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		: 2666.833
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	: 5332.77
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		: 2666.833
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	: 5332.67
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		: 2666.833
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	: 5332.82
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		: 2666.833
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	: 5332.75
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32951124 kB
MemFree:      20528880 kB
Buffers:        358116 kB
Cached:       11715436 kB
SwapCached:          0 kB
Active:        7329028 kB
Inactive:      4840048 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      20528880 kB
SwapTotal:    67111528 kB
SwapFree:     67111528 kB
Dirty:             760 kB
Writeback:           0 kB
AnonPages:       95484 kB
Mapped:          16916 kB
Slab:           191652 kB
PageTables:       5460 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS:   280504 kB
VmallocTotal: 34359738367 kB
VmallocUsed:     33868 kB
VmallocChunk: 34359703231 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 72388 MiB
End job on node132 at 2011-04-02 17:50:42