Trace number 3169870

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
sattime+ 2011-03-02SAT 15.3597 15.3597

General information on the benchmark

Namerandom/medium/
unif-k7-r89-v70-c6230-S1335110382-066.SATISFIABLE.cnf
MD5SUMa5daafd605bd47234b7e5aaf0173eab8
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark1.3028
Satisfiable
(Un)Satisfiability was proved
Number of variables70
Number of clauses6230
Sum of the clauses size43610
Maximum clause length7
Minimum clause length7
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 30
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 56230

Solver Data 

15.30/15.35	c 0 clauses are redundant and removed
15.30/15.35	c 0 vars are fixed and 0 clauses are removed after unit propagation
15.30/15.35	c 0 vars are fixed and 0 clauses are removed after lookahead
15.30/15.35	c initial seed is 1781057027
15.30/15.35	c try=1 flip j=3057119 walk=2115892 seed 1781057044
15.30/15.35	c A solution is found
15.30/15.35	s SATISFIABLE
15.30/15.35	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 
15.30/15.35	v 0 
15.30/15.35	c Done (mycputime is 15 seconds)

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-3169870-1301695643/watcher-3169870-1301695643 -o /tmp/evaluation-result-3169870-1301695643/solver-3169870-1301695643 -C 2400 -W 1300 -M 7680 sattime+ HOME/instance-3169870-1301695643.cnf 1781056914 

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: 3.85 3.98 3.91 4/189 15992
/proc/meminfo: memFree=23593540/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=880896 CPUtime=0 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4194304 261 0 0 0 0 0 0 0 25 0 1 0 281162035 902037504 204 33554432000 4194304 4228340 140735025267040 18446744073709551615 218905730816 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220224 204 102 9 0 217381 0

[startup+0.0504939 s]
/proc/loadavg: 3.85 3.98 3.91 4/189 15992
/proc/meminfo: memFree=23593540/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881816 CPUtime=0.04 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 513 0 0 0 4 0 0 0 25 0 1 0 281162035 902979584 455 33554432000 4194304 4228340 140735025267040 18446744073709551615 4206799 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220454 455 104 9 0 217611 0
Current children cumulated CPU time (s) 0.04
Current children cumulated vsize (KiB) 881816

[startup+0.100488 s]
/proc/loadavg: 3.85 3.98 3.91 4/189 15992
/proc/meminfo: memFree=23593540/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881816 CPUtime=0.09 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 513 0 0 0 9 0 0 0 25 0 1 0 281162035 902979584 455 33554432000 4194304 4228340 140735025267040 18446744073709551615 4206785 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220454 455 104 9 0 217611 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 881816

[startup+0.300454 s]
/proc/loadavg: 3.85 3.98 3.91 4/189 15992
/proc/meminfo: memFree=23593540/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881816 CPUtime=0.29 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 513 0 0 0 29 0 0 0 25 0 1 0 281162035 902979584 455 33554432000 4194304 4228340 140735025267040 18446744073709551615 4206874 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220454 455 104 9 0 217611 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 881816

[startup+0.700379 s]
/proc/loadavg: 3.85 3.98 3.91 4/189 15992
/proc/meminfo: memFree=23593540/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881820 CPUtime=0.69 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 576 0 0 0 69 0 0 0 25 0 1 0 281162035 902983680 517 33554432000 4194304 4228340 140735025267040 18446744073709551615 4218874 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220455 517 116 9 0 217612 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 881820

[startup+1.50023 s]
/proc/loadavg: 3.85 3.98 3.91 5/190 15993
/proc/meminfo: memFree=23590556/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881820 CPUtime=1.49 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 576 0 0 0 149 0 0 0 25 0 1 0 281162035 902983680 517 33554432000 4194304 4228340 140735025267040 18446744073709551615 4216899 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220455 517 116 9 0 217612 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 881820

[startup+3.10092 s]
/proc/loadavg: 3.85 3.98 3.91 4/188 15994
/proc/meminfo: memFree=23590076/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881820 CPUtime=3.1 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 576 0 0 0 310 0 0 0 25 0 1 0 281162035 902983680 517 33554432000 4194304 4228340 140735025267040 18446744073709551615 4218958 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220455 517 116 9 0 217612 0
Current children cumulated CPU time (s) 3.1
Current children cumulated vsize (KiB) 881820

[startup+6.30036 s]
/proc/loadavg: 3.86 3.98 3.91 4/185 16038
/proc/meminfo: memFree=23598832/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881820 CPUtime=6.3 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 576 0 0 0 630 0 0 0 25 0 1 0 281162035 902983680 517 33554432000 4194304 4228340 140735025267040 18446744073709551615 4218523 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220455 517 116 9 0 217612 0
Current children cumulated CPU time (s) 6.3
Current children cumulated vsize (KiB) 881820

[startup+12.7002 s]
/proc/loadavg: 3.87 3.98 3.91 6/190 16048
/proc/meminfo: memFree=23588476/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881820 CPUtime=12.7 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 576 0 0 0 1270 0 0 0 25 0 1 0 281162035 902983680 517 33554432000 4194304 4228340 140735025267040 18446744073709551615 4217565 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220455 517 116 9 0 217612 0
Current children cumulated CPU time (s) 12.7
Current children cumulated vsize (KiB) 881820

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

[startup+14.3069 s]
/proc/loadavg: 3.88 3.98 3.91 6/190 16048
/proc/meminfo: memFree=23588352/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881820 CPUtime=14.3 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 576 0 0 0 1430 0 0 0 25 0 1 0 281162035 902983680 517 33554432000 4194304 4228340 140735025267040 18446744073709551615 4217694 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220455 517 116 9 0 217612 0
Current children cumulated CPU time (s) 14.3
Current children cumulated vsize (KiB) 881820

[startup+15.1008 s]
/proc/loadavg: 3.88 3.98 3.91 6/190 16048
/proc/meminfo: memFree=23588352/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881820 CPUtime=15.1 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 576 0 0 0 1510 0 0 0 25 0 1 0 281162035 902983680 517 33554432000 4194304 4228340 140735025267040 18446744073709551615 4217064 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220455 517 116 9 0 217612 0
Current children cumulated CPU time (s) 15.1
Current children cumulated vsize (KiB) 881820

[startup+15.3007 s]
/proc/loadavg: 3.88 3.98 3.91 7/190 16048
/proc/meminfo: memFree=23588624/32951124 swapFree=67111528/67111528
[pid=15992] ppid=15990 vsize=881820 CPUtime=15.3 cores=0,2
/proc/15992/stat : 15992 (sattime+) R 15990 15992 15322 0 -1 4202496 576 0 0 0 1530 0 0 0 25 0 1 0 281162035 902983680 517 33554432000 4194304 4228340 140735025267040 18446744073709551615 4218876 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/15992/statm: 220455 517 116 9 0 217612 0
Current children cumulated CPU time (s) 15.3
Current children cumulated vsize (KiB) 881820

Child status: 10
Real time (s): 15.3597
CPU time (s): 15.3597
CPU user time (s): 15.3587
CPU system time (s): 0.000999
CPU usage (%): 100
Max. virtual memory (cumulated for all children) (KiB): 881820

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 15.3587
system time used= 0.000999
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 580
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= 2
involuntary context switches= 50

runsolver used 0.033994 second user time and 0.050992 second system time

The end

Launcher Data 

Begin job on node137 at 2011-04-02 00:07:23
IDJOB=3169870
IDBENCH=82888
IDSOLVER=1579
FILE ID=node137/3169870-1301695643
RUNJOBID= node137-1301690431-15340
PBS_JOBID= 12840699
Free space on /tmp= 72164 MiB

SOLVER NAME= sattime+ 2011-03-02
BENCH NAME= SAT11/random/medium/unif-k7-r89-v70-c6230-S1335110382-066.SATISFIABLE.cnf
COMMAND LINE= sattime+ BENCHNAME RANDOMSEED
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3169870-1301695643/watcher-3169870-1301695643 -o /tmp/evaluation-result-3169870-1301695643/solver-3169870-1301695643 -C 2400 -W 1300 -M 7680  sattime+ HOME/instance-3169870-1301695643.cnf 1781056914

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

MD5SUM BENCH= a5daafd605bd47234b7e5aaf0173eab8
RANDOM SEED=1781056914

node137.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		: 2666.844
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		: 2666.844
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		: 2666.844
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	: 5332.74
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		: 2666.844
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	: 5332.74
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		: 2666.844
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	: 5332.82
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		: 2666.844
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	: 5332.75
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		: 2666.844
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	: 5332.83
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		: 2666.844
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:      23593820 kB
Buffers:        310392 kB
Cached:        8738216 kB
SwapCached:          0 kB
Active:        5231904 kB
Inactive:      3883676 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      23593820 kB
SwapTotal:    67111528 kB
SwapFree:     67111528 kB
Dirty:           23328 kB
Writeback:           0 kB
AnonPages:       66304 kB
Mapped:          15240 kB
Slab:           179608 kB
PageTables:       5708 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS:  2884932 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= 72156 MiB
End job on node137 at 2011-04-02 00:07:39