Trace number 4121261

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
Open-WBO-LSU PB16UNSAT 0.538917 0.545565

General information on the benchmark

NamePB15eval/normalized-PB15eval/DEC-SMALLINT-LIN/ProofComplexity-Extracted-Cardinality-Constraints/
ProofComplexity/normalized-tseitin-regular-n52-d3-i2-f.cnf.gz-plain.pb.metafix.opb
MD5SUMf1c0049a61f4a8b5da3f80014a1b9675
Bench CategoryDEC-SMALLINT-LIN (no optimisation, small integers, linear constraints)
Best result obtained on this benchmarkUNSAT
Best value of the objective obtained on this benchmark
Best CPU time to get the best result obtained on this benchmark0.422935
Has Objective FunctionNO
Satisfiable
(Un)Satisfiability was proved
Best value of the objective function
Optimality of the best value was proved
Number of variables78
Total number of constraints208
Number of constraints which are clauses208
Number of constraints which are cardinality constraints (but not clauses)0
Number of constraints which are nor clauses,nor cardinality constraints0
Minimum length of a constraint3
Maximum length of a constraint3
Number of terms in the objective function 0
Biggest coefficient in the objective function 0
Number of bits for the biggest coefficient in the objective function 0
Sum of the numbers in the objective function 0
Number of bits of the sum of numbers in the objective function 0
Biggest number in a constraint 2
Number of bits of the biggest number in a constraint 2
Biggest sum of numbers in a constraint 5
Number of bits of the biggest sum of numbers3
Number of products (including duplicates)0
Sum of products size (including duplicates)0
Number of different products0
Sum of products size0

Solver Data

0.00/0.00	c
0.00/0.00	c Open-WBO:	 a Modular MaxSAT Solver -- based on Glucose4.0 (core version)
0.00/0.00	c Version:	 Pseudo-Boolean Evaluation 2016 -- LSU
0.00/0.00	c Authors:	 Ruben Martins, Vasco Manquinho, Ines Lynce
0.00/0.00	c Contributors:	 Miguel Neves, Saurabh Joshi, Mikolas Janota
0.00/0.00	c Contact:	 open-wbo@sat.inesc-id.pt -- http://sat.inesc-id.pt/open-wbo/
0.00/0.00	c
0.00/0.00	c WARNING: for repeatability, setting FPU to use double precision
0.00/0.00	c Instance file HOME/instance-4121261-1467309247.opb
0.00/0.00	c File size is 6004 bytes.
0.49/0.54	c Sum of soft weights:            0
0.49/0.54	c |                                                                                                       |
0.49/0.54	c ========================================[ Problem Statistics ]===========================================
0.49/0.54	c |                                                                                                       |
0.49/0.54	c |  Problem Type:           Unweighted                                                                   |
0.49/0.54	c |  Number of variables:            78                                                                   |
0.49/0.54	c |  Number of hard clauses:        208                                                                   |
0.49/0.54	c |  Number of soft clauses:          0                                                                   |
0.49/0.54	c |  Number of cardinality:           0                                                                   |
0.49/0.54	c |  Number of PB :                   0                                                                   |
0.49/0.54	c |  Parse time:                   0.00 s                                                                 |
0.49/0.54	c |                                                                                                       |
0.49/0.54	c ==========================================[ Solver Settings ]============================================
0.49/0.54	c |                                                                                                       |
0.49/0.54	c |  Algorithm:                LinearSU                                                                   |
0.49/0.54	c |  Cardinality Encoding:       Modulo Totalizer                                                         |
0.49/0.54	c |                                                                                                       |
0.49/0.54	s UNSATISFIABLE

Verifier Data

ERROR: no interpretation found !

Watcher Data

runsolver Copyright (C) 2010-2013 Olivier ROUSSEL

This is runsolver version 3.3.7 (svn: 2553)

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-4121261-1467309247/watcher-4121261-1467309247 -o /tmp/evaluation-result-4121261-1467309247/solver-4121261-1467309247 -C 1800 -W 1900 -M 15500 --bin-var /tmp/runsolver-exch-node120-1467308749-13709 --watchdog 1960 open-wbo-lsu HOME/instance-4121261-1467309247.opb 

pid=15537
running on 4 cores: 0,2,4,6

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): 1900 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: 2.30 2.17 1.88 3/176 15540
/proc/meminfo: memFree=28353832/32872528 swapFree=1590004/1720820
[pid=15540] ppid=15537 vsize=24328 CPUtime=0 cores=0,2,4,6
/proc/15540/stat : 15540 (runsolver) R 15537 15540 13693 0 -1 4202560 115 0 0 0 0 0 0 0 20 0 1 0 11883176 24911872 152 33554432000 4194304 4338465 140736601578752 140736601576392 226084342967 0 0 4096 24578 0 0 0 17 0 0 0 0 0 0
/proc/15540/statm: 6082 152 105 36 0 2655 0

[startup+0.100127 s]
/proc/loadavg: 2.30 2.17 1.88 3/176 15540
/proc/meminfo: memFree=28353832/32872528 swapFree=1590004/1720820
[pid=15540] ppid=15537 vsize=3564 CPUtime=0.09 cores=0,2,4,6
/proc/15540/stat : 15540 (open-wbo-lsu) R 15537 15540 13693 0 -1 4202496 621 0 0 0 9 0 0 0 20 0 1 0 11883176 3649536 488 33554432000 4194304 6058637 140737103073040 140736601575944 4260843 0 0 4096 8404992 0 0 0 17 2 0 0 0 0 0
/proc/15540/statm: 891 488 172 456 0 427 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 3564

[startup+0.200343 s]
/proc/loadavg: 2.30 2.17 1.88 3/176 15540
/proc/meminfo: memFree=28353832/32872528 swapFree=1590004/1720820
[pid=15540] ppid=15537 vsize=4580 CPUtime=0.19 cores=0,2,4,6
/proc/15540/stat : 15540 (open-wbo-lsu) R 15537 15540 13693 0 -1 4202496 848 0 0 0 19 0 0 0 20 0 1 0 11883176 4689920 703 33554432000 4194304 6058637 140737103073040 140736601575944 4263712 0 0 4096 8404992 0 0 0 17 2 0 0 0 0 0
/proc/15540/statm: 1145 703 172 456 0 681 0
Current children cumulated CPU time (s) 0.19
Current children cumulated vsize (KiB) 4580

[startup+0.300316 s]
/proc/loadavg: 2.30 2.17 1.88 3/176 15540
/proc/meminfo: memFree=28353832/32872528 swapFree=1590004/1720820
[pid=15540] ppid=15537 vsize=5752 CPUtime=0.29 cores=0,2,4,6
/proc/15540/stat : 15540 (open-wbo-lsu) R 15537 15540 13693 0 -1 4202496 959 0 0 0 29 0 0 0 20 0 1 0 11883176 5890048 809 33554432000 4194304 6058637 140737103073040 140736601575944 4277712 0 0 4096 8404992 0 0 0 17 2 0 0 0 0 0
/proc/15540/statm: 1438 809 172 456 0 974 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 5752

Solver just ended.
??? exit watcher main loop
??? sigkill at end of watcher main loop
??? kill 15540 sig 9
??? end of watcher thread
Dumping a history of the last processes samples

[startup+0.400288 s]
/proc/loadavg: 2.30 2.17 1.88 3/176 15540
/proc/meminfo: memFree=28353832/32872528 swapFree=1590004/1720820
[pid=15540] ppid=15537 vsize=5752 CPUtime=0.39 cores=0,2,4,6
/proc/15540/stat : 15540 (open-wbo-lsu) R 15537 15540 13693 0 -1 4202496 1082 0 0 0 39 0 0 0 20 0 1 0 11883176 5890048 927 33554432000 4194304 6058637 140737103073040 140736601575944 4261346 0 0 4096 8404992 0 0 0 17 2 0 0 0 0 0
/proc/15540/statm: 1438 928 172 456 0 974 0
Current children cumulated CPU time (s) 0.39
Current children cumulated vsize (KiB) 5752

[startup+0.50027 s]
/proc/loadavg: 2.30 2.17 1.88 3/176 15540
/proc/meminfo: memFree=28353832/32872528 swapFree=1590004/1720820
[pid=15540] ppid=15537 vsize=5752 CPUtime=0.49 cores=0,2,4,6
/proc/15540/stat : 15540 (open-wbo-lsu) R 15537 15540 13693 0 -1 4202496 1111 0 0 0 49 0 0 0 20 0 1 0 11883176 5890048 955 33554432000 4194304 6058637 140737103073040 140736601575944 4254419 0 0 4096 8404992 0 0 0 17 2 0 0 0 0 0
/proc/15540/statm: 1438 955 172 456 0 974 0
Current children cumulated CPU time (s) 0.49
Current children cumulated vsize (KiB) 5752

Child status: 20
Real time (s): 0.545565
CPU time (s): 0.538917
CPU user time (s): 0.536918
CPU system time (s): 0.001999
CPU usage (%): 98.7815
Max. virtual memory (cumulated for all children) (KiB): 5752

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.536918
system time used= 0.001999
maximum resident set size= 3832
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 1114
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= 3
involuntary context switches= 1

??? join timestamper begins
??? join timestamper ends
??? end of timestamper thread
runsolver used 0.006998 second user time and 0.004999 second system time

The end

Launcher Data

Begin job on node120 at 2016-06-30 19:54:07
IDJOB=4121261
IDBENCH=110382
IDSOLVER=2545
FILE ID=node120/4121261-1467309247
RUNJOBID= node120-1467308749-13709
PBS_JOBID= 20005266
Free space on /tmp= 71668 MiB

SOLVER NAME= Open-WBO-LSU PB16
BENCH NAME= PB15eval/normalized-PB15eval/DEC-SMALLINT-LIN/ProofComplexity-Extracted-Cardinality-Constraints/ProofComplexity/normalized-tseitin-regular-n52-d3-i2-f.cnf.gz-plain.pb.metafix.opb
COMMAND LINE= open-wbo-lsu BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-4121261-1467309247/watcher-4121261-1467309247 -o /tmp/evaluation-result-4121261-1467309247/solver-4121261-1467309247 -C 1800 -W 1900 -M 15500 --bin-var /tmp/runsolver-exch-node120-1467308749-13709 --watchdog 1960  open-wbo-lsu HOME/instance-4121261-1467309247.opb

TIME LIMIT= 1800 seconds
MEMORY LIMIT= 15500 MiB
NBCORE= 4

MD5SUM BENCH= f1c0049a61f4a8b5da3f80014a1b9675
RANDOM SEED=411815002

node120.alineos.net Linux 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27 19:49:27 BST 2011

/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		: 2666.669
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5333.33
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.669
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 0
cpu cores	: 4
apicid		: 16
initial apicid	: 16
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.56
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 2
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.669
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 2
initial apicid	: 2
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.56
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 3
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.669
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 1
cpu cores	: 4
apicid		: 18
initial apicid	: 18
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.55
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 4
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.669
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 4
initial apicid	: 4
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.55
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 5
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.669
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 2
cpu cores	: 4
apicid		: 20
initial apicid	: 20
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.54
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 6
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.669
cache size	: 8192 KB
physical id	: 0
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 6
initial apicid	: 6
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.55
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:

processor	: 7
vendor_id	: GenuineIntel
cpu family	: 6
model		: 26
model name	: Intel(R) Xeon(R) CPU           X5550  @ 2.67GHz
stepping	: 5
cpu MHz		: 2666.669
cache size	: 8192 KB
physical id	: 1
siblings	: 4
core id		: 3
cpu cores	: 4
apicid		: 22
initial apicid	: 22
fpu		: yes
fpu_exception	: yes
cpuid level	: 11
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology nonstop_tsc aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 sse4_2 popcnt lahf_lm ida tpr_shadow vnmi flexpriority ept vpid
bogomips	: 5332.55
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:


/proc/meminfo:
MemTotal:       32872528 kB
MemFree:        28354088 kB
Buffers:          162232 kB
Cached:          1853688 kB
SwapCached:            0 kB
Active:           295924 kB
Inactive:        1759012 kB
Active(anon):      41536 kB
Inactive(anon):        0 kB
Active(file):     254388 kB
Inactive(file):  1759012 kB
Unevictable:     1720820 kB
Mlocked:         1590004 kB
SwapTotal:      67108856 kB
SwapFree:       67108856 kB
Dirty:              9424 kB
Writeback:             0 kB
AnonPages:       1759764 kB
Mapped:            14676 kB
Shmem:               204 kB
Slab:             610248 kB
SReclaimable:      54128 kB
SUnreclaim:       556120 kB
KernelStack:        1408 kB
PageTables:         7432 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    83545120 kB
Committed_AS:    1867216 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      346412 kB
VmallocChunk:   34341988032 kB
HardwareCorrupted:     0 kB
AnonHugePages:    141312 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:        7552 kB
DirectMap2M:    33538048 kB

Free space on /tmp at the end= 71664 MiB
End job on node120 at 2016-06-30 19:54:07