Trace number 3421847

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
CryptoMiniSat Strange-Night2-st (fixed)SAT 0.066989 0.067229

General information on the benchmark

Namecrafted/mosoi/
289/289-sat-11x10.cnf
MD5SUM5d217b4e2e013436c5df3f8194310a1a
Bench CategoryCRAFTED (crafted instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.010998
Satisfiable
(Un)Satisfiability was proved
Number of variables440
Number of clauses10670
Sum of the clauses size41360
Maximum clause length4
Minimum clause length2
Number of clauses of size 10
Number of clauses of size 2660
Number of clauses of size 30
Number of clauses of size 410010
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

0.00/0.00	c Outputting solution to console
0.00/0.00	c This is CryptoMiniSat 3.0.0
0.00/0.00	c WARNING: for repeatability, setting FPU to use double precision
0.00/0.00	c Reading file 'HOME/instance-3421847-1306606799.cnf'
0.00/0.00	c -- header says num vars:            440
0.00/0.00	c -- header says num clauses:       10670
0.00/0.00	c -- clauses added:            0 learnts,        10670 normals,            0 xors
0.00/0.00	c -- vars added        440
0.00/0.00	c Parsing time:  0.00 s
0.00/0.00	c  N st     0         0       440     10010       660         0     41360         0   no data   no data
0.00/0.02	c asymm  cl-useful: 0/10010/10010 lits-rem:0 time: 0.02
0.00/0.02	c Flit:     0 Blit:      0 bXBeca:    0 bXProp:    0 Bins:      0 BRemL:      0 BRemN:      0 P:  0.1M T:  0.00
0.00/0.02	c blocked clauses removed:        0 vars:      0 tried:           0 T: 0.00 s
0.00/0.02	c bin-w-bin subsume rem            0 bins  time:  0.00 s
0.00/0.02	c subs with bin:        0  lits-rem:         0  v-fix:    0  time:  0.00 s
0.00/0.02	c Subs w/ non-existent bins:      0 l-rem:      0 v-fix:     0 done:    440 time:  0.00 s
0.00/0.02	c Removed useless bin:       0  fixed:     0  props:   0.00M  time:  0.00 s
0.05/0.06	c lits-rem:         0  cl-subs:        0  v-elim:    110  v-fix:    0  time:  0.03 s
0.05/0.06	c Finding binary XORs  T:     0.00 s  found:       0
0.05/0.06	c Finding non-binary XORs:     0.00 s (found:       0, avg size: nan)
0.05/0.06	c calculated reachability. Time: 0.00
0.05/0.06	c Calc default polars -  time:   0.00 s pos:       0 undec:     110 neg:     330
0.05/0.06	c =========================================================================================
0.05/0.06	c types(t): F = full restart, N = normal restart
0.05/0.06	c types(t): S = simplification begin/end, E = solution found
0.05/0.06	c restart types(rt): st = static, dy = dynamic
0.05/0.06	c  t rt  Rest     Confl      Vars   NormCls    BinCls   Learnts    ClLits    LtLits
0.05/0.06	c  B st     0         0       330      9900       330         0     60060         0   no data   no data
0.05/0.06	c  E st     2       104         0      9900       330       104     60060      3028   no data   no data
0.05/0.06	c Verified 9900 clauses.
0.05/0.06	c Solution needs extension. Extending.
0.05/0.06	c Verified 9900 clauses.
0.05/0.06	c num threads              : 1          
0.05/0.06	c restarts                 : 2          
0.05/0.06	c dynamic restarts         : 0          
0.05/0.06	c static restarts          : 2          
0.05/0.06	c full restarts            : 0          
0.05/0.06	c total simplify time      : 0.00       
0.05/0.06	c learnts DL2              : 0          
0.05/0.06	c learnts size 2           : 660        
0.05/0.06	c learnts size 1           : 0           (0.00      % of vars)
0.05/0.06	c filedLit time            : 0.00        (1.56      % time)
0.05/0.06	c v-elim SatELite          : 110         (25.00     % vars)
0.05/0.06	c SatELite time            : 0.03        (46.87     % time)
0.05/0.06	c v-elim xor               : 0           (0.00      % vars)
0.05/0.06	c xor elim time            : 0.00        (0.00      % time)
0.05/0.06	c num binary xor trees     : 0          
0.05/0.06	c binxor trees' crown      : 0           (nan       leafs/tree)
0.05/0.06	c bin xor find time        : 0.00       
0.05/0.06	c OTF clause improved      : 0           (0.00      clauses/conflict)
0.05/0.06	c OTF impr. size diff      : 0           (nan        lits/clause)
0.05/0.06	c OTF cl watch-shrink      : 3           (0.03      clauses/conflict)
0.05/0.06	c OTF cl watch-sh-lit      : 3           (1.00       lits/clause)
0.05/0.06	c tried to recurMin cls    : 6           (5.77       % of conflicts)
0.05/0.06	c updated cache            : 0           (0.00       lits/tried recurMin)
0.05/0.06	c clauses over max glue    : 0           (0.00      % of all clauses)
0.05/0.06	c conflicts                : 104         (1625.25   / sec)
0.05/0.06	c decisions                : 288         (0.00      % random)
0.05/0.06	c bogo-props               : 3729296     (58279356.15 / sec)
0.05/0.06	c conflict literals        : 3028        (0.62      % deleted)
0.05/0.06	c Memory used              : 32.43       MB
0.05/0.06	c CPU time                 : 0.06        s
0.05/0.06	s SATISFIABLE
0.05/0.06	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 0

Verifier Data 

OK

Watcher Data 

runsolver Copyright (C) 2010-2011 Olivier ROUSSEL

This is runsolver version 3.3.0 (svn: 961)

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-3421847-1306606799/watcher-3421847-1306606799 -o /tmp/evaluation-result-3421847-1306606799/solver-3421847-1306606799 -C 5000 -W 5100 -M 15500 ./strangenight2-st HOME/instance-3421847-1306606799.cnf 

running on 4 cores: 0,2,4,6

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 5000 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 5030 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 5100 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 15872000 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 15923200 KiB
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 2.00 2.02 2.00 2/533 13421
/proc/meminfo: memFree=17855376/32951124 swapFree=64205420/67111528
[pid=13421] ppid=13419 vsize=30196 CPUtime=0 cores=0,2,4,6
/proc/13421/stat : 13421 (strangenight2-s) R 13419 13421 12055 0 -1 4202496 717 0 0 0 0 0 0 0 23 0 1 0 772277887 30920704 658 33554432000 4194304 4580011 140735193623280 18446744073709551615 4294553 0 0 4096 2 0 0 0 17 4 0 0 0
/proc/13421/statm: 7549 658 338 95 0 2531 0

[startup+0.0566291 s]
/proc/loadavg: 2.00 2.02 2.00 2/533 13421
/proc/meminfo: memFree=17855376/32951124 swapFree=64205420/67111528
[pid=13421] ppid=13419 vsize=32720 CPUtime=0.05 cores=0,2,4,6
/proc/13421/stat : 13421 (strangenight2-s) R 13419 13421 12055 0 -1 4202496 1538 0 0 0 5 0 0 0 23 0 1 0 772277887 33505280 1405 33554432000 4194304 4580011 140735193623280 18446744073709551615 4489420 0 0 4096 2 0 0 0 17 4 0 0 0
/proc/13421/statm: 8180 1407 354 95 0 3162 0
Current children cumulated CPU time (s) 0.05
Current children cumulated vsize (KiB) 32720

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

[startup+0.0566291 s]
/proc/loadavg: 2.00 2.02 2.00 2/533 13421
/proc/meminfo: memFree=17855376/32951124 swapFree=64205420/67111528
[pid=13421] ppid=13419 vsize=32720 CPUtime=0.05 cores=0,2,4,6
/proc/13421/stat : 13421 (strangenight2-s) R 13419 13421 12055 0 -1 4202496 1538 0 0 0 5 0 0 0 23 0 1 0 772277887 33505280 1405 33554432000 4194304 4580011 140735193623280 18446744073709551615 4489420 0 0 4096 2 0 0 0 17 4 0 0 0
/proc/13421/statm: 8180 1407 354 95 0 3162 0
Current children cumulated CPU time (s) 0.05
Current children cumulated vsize (KiB) 32720

Child status: 10
Real time (s): 0.067229
CPU time (s): 0.066989
CPU user time (s): 0.06399
CPU system time (s): 0.002999
CPU usage (%): 99.643
Max. virtual memory (cumulated for all children) (KiB): 32720

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.06399
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= 1754
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= 7

runsolver used 0.006998 second user time and 0.013997 second system time

The end

Launcher Data 

Begin job on node136 at 2011-05-28 20:19:59
IDJOB=3421847
IDBENCH=83174
IDSOLVER=1887
FILE ID=node136/3421847-1306606799
RUNJOBID= node136-1306606799-13402
PBS_JOBID= 13471544
Free space on /tmp= 73376 MiB

SOLVER NAME= CryptoMiniSat Strange-Night2-st (fixed)
BENCH NAME= SAT11/crafted/mosoi/289/289-sat-11x10.cnf
COMMAND LINE= ./strangenight2-st BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3421847-1306606799/watcher-3421847-1306606799 -o /tmp/evaluation-result-3421847-1306606799/solver-3421847-1306606799 -C 5000 -W 5100 -M 15500  ./strangenight2-st HOME/instance-3421847-1306606799.cnf

TIME LIMIT= 5000 seconds
MEMORY LIMIT= 15500 MiB
NBCORE= 4

MD5SUM BENCH= 5d217b4e2e013436c5df3f8194310a1a
RANDOM SEED=493777057

node136.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		: 2666.809
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	: 5333.61
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		: 2666.809
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	: 5332.75
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		: 2666.809
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	: 5332.75
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		: 2666.809
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	: 5332.76
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		: 2666.809
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	: 5332.75
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		: 2666.809
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		: 2666.809
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		: 2666.809
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	: 5332.74
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32951124 kB
MemFree:      17855656 kB
Buffers:        260076 kB
Cached:        5723892 kB
SwapCached:      25124 kB
Active:        4702660 kB
Inactive:     10111444 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      17855656 kB
SwapTotal:    67111528 kB
SwapFree:     64205420 kB
Dirty:           11300 kB
Writeback:           0 kB
AnonPages:     8810796 kB
Mapped:          39860 kB
Slab:           142312 kB
PageTables:      69224 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS: 169225348 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= 73376 MiB
End job on node136 at 2011-05-28 20:19:59