Trace number 3384399

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
QuteRSat 2011-05-12 (fixed)UNSAT 2.49062 2.49095

General information on the benchmark

Nameapplication/jarvisalo/HWMCC10-combination-timeframe-expansion/
hwmcc10-timeframe-expansion-k50-bc57sensorsp2-tseitin.cnf
MD5SUM6e04f35d78573827a20cb4936c2b6acb
Bench CategoryAPPLICATION (applications instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.740886
Satisfiable
(Un)Satisfiability was proved
Number of variables71285
Number of clauses196970
Sum of the clauses size459594
Maximum clause length3
Minimum clause length1
Number of clauses of size 12
Number of clauses of size 2131312
Number of clauses of size 365656
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

0.00/0.00	c Set FPU double precision.
0.09/0.11	c Parse Cnf success: #var: 71285 #clause: 196970
0.09/0.11	c Find Units :          2
0.09/0.11	c Find Invs  :          0
0.09/0.13	c Find Ands  :      68686 AvgFaninNum: 2
0.09/0.14	c Find Xors  :          0 AvgFaninNum: nan
0.09/0.15	c Find Ite   :          0
0.09/0.18	c UnDirect variable: 0
0.09/0.18	c UnDirect to Direct Gate: 0
0.09/0.18	c Forced Direct Gate: 0 Unuse unDirect Gate: 0
0.09/0.19	c Break Cycle : 830
0.09/0.19	c Total Root : 1 Undef Var: 6458
0.19/0.22	c After covering, Total Root: 779 Leaf: 6425
0.19/0.22	c Variable( cover/uncovered/unused ): 71252 33 0
0.19/0.22	c Unit Clauses: 2
0.19/0.22	c Binary Clauses( cover/uncovered ): 129654 1658
0.19/0.22	c Clauses( cover/uncovered ): 64827 829
0.19/0.22	c Total Clauses( cover/uncovered ): 194483 2487 98.7374%
0.19/0.22	c Covered Ands: 64827 Invs: 0 Xors: 0 Ites: 0
0.19/0.23	c Uncover Clauses avg size: 2.33333 max size: 3
0.19/0.23	c Final circuit: i/l/o/s    6457       0    2488     68138
0.19/0.23	c CnfToAig: Time: 0.23 s
0.29/0.40	c TmMap: Set choices finish.
0.39/0.42	c TmMap: Set big and: 6859
0.39/0.42	c TmMap: Origin: 74596 ClauseNum: 204414 --> New: 28299 ClauseNum: 97491
0.39/0.42	c TmMap: Time: 0.04
0.89/0.90	c Simulation --> TransNum: 69507/97491 Try to Add: #clause: 59086 #xorclause: 0
0.89/0.93	c #var: 25358 #clauses: 46493 Solving... 
2.10/2.15	c Abstract SAT
2.20/2.22	c Simulation --> TransNum: 85947/97491 Try to Add: #clause: 1651 #xorclause: 0
2.20/2.22	c #var: 25494 #clauses: 29469 Solving... 
2.20/2.24	c Abstract SAT
2.29/2.31	c Simulation --> TransNum: 88496/97491 Try to Add: #clause: 1654 #xorclause: 0
2.29/2.32	c #var: 25757 #clauses: 30293 Solving... 
2.29/2.34	c Abstract SAT
2.29/2.34	c Simulation --> TransNum: 97491/97491 Try to Add: #clause: 8570 #xorclause: 0
2.29/2.34	c #var: 25811 #clauses: 31981 Solving... 
2.39/2.47	s UNSATISFIABLE
2.39/2.48	c CPU time: 2.47 s

Verifier Data 

No possible verification on an UNSAT instance

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-3384399-1305545681/watcher-3384399-1305545681 -o /tmp/evaluation-result-3384399-1305545681/solver-3384399-1305545681 -C 5000 -W 5100 -M 15500 qutersat_release HOME/instance-3384399-1305545681.cnf 2057251383 

running on 4 cores: 1,3,5,7

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 2.01 2.00 2/338 9143
/proc/meminfo: memFree=11275236/32951124 swapFree=57171160/67111528
[pid=9143] ppid=9141 vsize=34036 CPUtime=0 cores=1,3,5,7
/proc/9143/stat : 9143 (qutersat_releas) R 9141 9143 8726 0 -1 4202496 2349 0 0 0 0 0 0 0 25 0 1 0 646983713 34852864 2285 33554432000 4194304 6014671 140735952918960 18446744073709551615 4307704 0 0 4096 16386 0 0 0 17 5 0 0 0
/proc/9143/statm: 8509 2286 378 445 0 2054 0

[startup+0.014632 s]
/proc/loadavg: 2.00 2.01 2.00 2/338 9143
/proc/meminfo: memFree=11275236/32951124 swapFree=57171160/67111528
[pid=9143] ppid=9141 vsize=36084 CPUtime=0.01 cores=1,3,5,7
/proc/9143/stat : 9143 (qutersat_releas) R 9141 9143 8726 0 -1 4202496 2760 0 0 0 1 0 0 0 25 0 1 0 646983713 36950016 2696 33554432000 4194304 6014671 140735952918960 18446744073709551615 4277551 0 0 4096 16386 0 0 0 17 5 0 0 0
/proc/9143/statm: 9021 2696 378 445 0 2566 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 36084

[startup+0.100601 s]
/proc/loadavg: 2.00 2.01 2.00 2/338 9143
/proc/meminfo: memFree=11275236/32951124 swapFree=57171160/67111528
[pid=9143] ppid=9141 vsize=53492 CPUtime=0.09 cores=1,3,5,7
/proc/9143/stat : 9143 (qutersat_releas) R 9141 9143 8726 0 -1 4202496 7130 0 0 0 9 0 0 0 25 0 1 0 646983713 54775808 7066 33554432000 4194304 6014671 140735952918960 18446744073709551615 4803473 0 0 4096 16386 0 0 0 17 5 0 0 0
/proc/9143/statm: 13373 7066 378 445 0 6918 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 53492

[startup+0.300566 s]
/proc/loadavg: 2.00 2.01 2.00 2/338 9143
/proc/meminfo: memFree=11275236/32951124 swapFree=57171160/67111528
[pid=9143] ppid=9141 vsize=61812 CPUtime=0.29 cores=1,3,5,7
/proc/9143/stat : 9143 (qutersat_releas) R 9141 9143 8726 0 -1 4202496 9597 0 0 0 28 1 0 0 25 0 1 0 646983713 63295488 9533 33554432000 4194304 6014671 140735952918960 18446744073709551615 4817363 0 0 4096 16386 0 0 0 17 5 0 0 0
/proc/9143/statm: 15453 9533 668 445 0 8998 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 61812

[startup+0.700478 s]
/proc/loadavg: 2.00 2.01 2.00 2/338 9143
/proc/meminfo: memFree=11275236/32951124 swapFree=57171160/67111528
[pid=9143] ppid=9141 vsize=72908 CPUtime=0.69 cores=1,3,5,7
/proc/9143/stat : 9143 (qutersat_releas) R 9141 9143 8726 0 -1 4202496 12351 0 0 0 68 1 0 0 25 0 1 0 646983713 74657792 12287 33554432000 4194304 6014671 140735952918960 18446744073709551615 4244584 0 0 4096 16386 0 0 0 17 5 0 0 0
/proc/9143/statm: 18227 12287 681 445 0 11772 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 72908

[startup+1.50032 s]
/proc/loadavg: 2.00 2.01 2.00 3/339 9144
/proc/meminfo: memFree=11226000/32951124 swapFree=57171160/67111528
[pid=9143] ppid=9141 vsize=81112 CPUtime=1.49 cores=1,3,5,7
/proc/9143/stat : 9143 (qutersat_releas) R 9141 9143 8726 0 -1 4202496 12660 0 0 0 148 1 0 0 25 0 1 0 646983713 83058688 12596 33554432000 4194304 6014671 140735952918960 18446744073709551615 4423491 0 0 4096 16386 0 0 0 17 5 0 0 0
/proc/9143/statm: 20278 12596 697 445 0 13823 0
Current children cumulated CPU time (s) 1.49
Current children cumulated vsize (KiB) 81112

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

[startup+1.90024 s]
/proc/loadavg: 2.00 2.01 2.00 3/339 9144
/proc/meminfo: memFree=11226000/32951124 swapFree=57171160/67111528
[pid=9143] ppid=9141 vsize=81112 CPUtime=1.89 cores=1,3,5,7
/proc/9143/stat : 9143 (qutersat_releas) R 9141 9143 8726 0 -1 4202496 12666 0 0 0 188 1 0 0 25 0 1 0 646983713 83058688 12602 33554432000 4194304 6014671 140735952918960 18446744073709551615 4668240 0 0 4096 16386 0 0 0 17 5 0 0 0
/proc/9143/statm: 20278 12602 702 445 0 13823 0
Current children cumulated CPU time (s) 1.89
Current children cumulated vsize (KiB) 81112

[startup+2.30117 s]
/proc/loadavg: 2.00 2.01 2.00 3/339 9144
/proc/meminfo: memFree=11221908/32951124 swapFree=57171160/67111528
[pid=9143] ppid=9141 vsize=92376 CPUtime=2.29 cores=1,3,5,7
/proc/9143/stat : 9143 (qutersat_releas) R 9141 9143 8726 0 -1 4202496 15535 0 0 0 228 1 0 0 25 0 1 0 646983713 94593024 15464 33554432000 4194304 6014671 140735952918960 18446744073709551615 4244198 0 0 4096 16386 0 0 0 17 5 0 0 0
/proc/9143/statm: 23094 15464 728 445 0 16639 0
Current children cumulated CPU time (s) 2.29
Current children cumulated vsize (KiB) 92376

[startup+2.40115 s]
/proc/loadavg: 2.00 2.01 2.00 3/339 9144
/proc/meminfo: memFree=11221908/32951124 swapFree=57171160/67111528
[pid=9143] ppid=9141 vsize=93400 CPUtime=2.39 cores=1,3,5,7
/proc/9143/stat : 9143 (qutersat_releas) R 9141 9143 8726 0 -1 4202496 15817 0 0 0 238 1 0 0 25 0 1 0 646983713 95641600 15746 33554432000 4194304 6014671 140735952918960 18446744073709551615 4378944 0 0 4096 16386 0 0 0 17 5 0 0 0
/proc/9143/statm: 23350 15746 728 445 0 16895 0
Current children cumulated CPU time (s) 2.39
Current children cumulated vsize (KiB) 93400

Child status: 0
Real time (s): 2.49095
CPU time (s): 2.49062
CPU user time (s): 2.46862
CPU system time (s): 0.021996
CPU usage (%): 99.9866
Max. virtual memory (cumulated for all children) (KiB): 93400

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 2.46862
system time used= 0.021996
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 15828
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= 5
involuntary context switches= 2

runsolver used 0.012998 second user time and 0.023996 second system time

The end

Launcher Data 

Begin job on node143 at 2011-05-16 13:34:41
IDJOB=3384399
IDBENCH=82472
IDSOLVER=1868
FILE ID=node143/3384399-1305545681
RUNJOBID= node143-1305540196-8745
PBS_JOBID= 13329210
Free space on /tmp= 73216 MiB

SOLVER NAME= QuteRSat 2011-05-12 (fixed)
BENCH NAME= SAT11/application/jarvisalo/HWMCC10-combination-timeframe-expansion/hwmcc10-timeframe-expansion-k50-bc57sensorsp2-tseitin.cnf
COMMAND LINE= qutersat_release BENCHNAME RANDOMSEED
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3384399-1305545681/watcher-3384399-1305545681 -o /tmp/evaluation-result-3384399-1305545681/solver-3384399-1305545681 -C 5000 -W 5100 -M 15500  qutersat_release HOME/instance-3384399-1305545681.cnf 2057251383

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

MD5SUM BENCH= 6e04f35d78573827a20cb4936c2b6acb
RANDOM SEED=2057251383

node143.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		: 2666.846
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	: 5333.69
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		: 2666.846
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	: 5226.15
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		: 2666.846
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		: 2666.846
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		: 2666.846
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		: 2666.846
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		: 2666.846
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	: 5332.74
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		: 2666.846
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:      11275384 kB
Buffers:        196596 kB
Cached:        1860504 kB
SwapCached:      39776 kB
Active:       13583480 kB
Inactive:      7810868 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      11275384 kB
SwapTotal:    67111528 kB
SwapFree:     57171160 kB
Dirty:            4952 kB
Writeback:           0 kB
AnonPages:    19296944 kB
Mapped:          25428 kB
Slab:           135624 kB
PageTables:      82544 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS: 85023960 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= 73212 MiB
End job on node143 at 2011-05-16 13:34:44