Trace number 3716446

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
wbo2sat 2012-05-19OPTIMUM 1.00885 1.01283

General information on the benchmark

Name/PARTIAL-SMALLINT-LIN/wcsp/
academics/normalized-send_wcsp.wbo
MD5SUM579550ba8a4368ea911c9080981cd647
Bench CategoryPARTIAL-SMALLINT-LIN (both soft and hard constraints, small integers, linear constraints)
Best result obtained on this benchmarkMOPT
Best cost obtained on this benchmark0
Best CPU time to get the best result obtained on this benchmark0.084986
Max-Satisfiable
Max-(Un)Satisfiability was proved
Best value of the cost
Optimality of the best cost was proved
Number of variables84
Total number of constraints11473
Number of soft constraints11462
Number of constraints which are clauses11462
Number of constraints which are cardinality constraints (but not clauses)11
Number of constraints which are nor clauses,nor cardinality constraints0
Minimum length of a constraint2
Maximum length of a constraint10
Top cost 1
Min constraint cost 1
Max constraint cost 1
Sum of constraints costs 11462
Biggest number in a constraint 4
Number of bits of the biggest number in a constraint 3
Biggest sum of numbers in a constraint 11
Number of bits of the biggest sum of numbers4
Number of products (including duplicates)0
Sum of products size (including duplicates)0
Number of different products0
Sum of products size0

Quality of the solution as a function of time


Download the above graph as a PDF file / as an EPS file

Solver Data 

0.00/0.21	o 7
0.00/0.21	c current bound: 3
0.00/0.21	c (debug) using card networks
0.00/0.53	o 3
0.00/0.53	c current bound: 1
0.00/0.53	c (debug) using card networks
0.00/0.97	o 1
0.00/0.97	c current bound: 0
0.95/1.01	o 0
0.95/1.01	s OPTIMUM FOUND
0.95/1.01	v -x1 -x2 -x3 -x4 -x5 -x6 -x7 -x8 x9 -x10 -x11 -x12 -x13 -x14 x15 -x16 -x17 -x18 -x19 -x20 -x21 -x22 -x23 -x24 -x25 x26 -x27 -x28 -x29 -x30 -x31 -x32 -x33 -x34 -x35 -x36 x37 -x38 -x39 x40 -x41 -x42 -x43 -x44 -x45 -x46 -x47 -x48 x49 -x50 -x51 -x52 -x53 -x54 -x55 -x56 -x57 -x58 -x59 -x60 -x61 x62 -x63 -x64 -x65 -x66 -x67 -x68 -x69 -x70 x71 -x72 -x73 -x74 -x75 -x76 -x77 -x78 -x79 x80 -x81 x82 x83 -x84

Verifier Data 

OK	0

Watcher Data 

runsolver Copyright (C) 2010-2011 Olivier ROUSSEL

This is runsolver version 3.3.1 (svn: 989)

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-3716446-1338214929/watcher-3716446-1338214929 -o /tmp/evaluation-result-3716446-1338214929/solver-3716446-1338214929 -C 1800 -W 1900 -M 15500 HOME/runWbo2sat.sh HOME/instance-3716446-1338214929.wbo 1305219085 HOME HOME 

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

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: 2.03 2.01 2.00 3/179 21660
/proc/meminfo: memFree=27336404/32873648 swapFree=6864/6864
[pid=21660] ppid=21658 vsize=9148 CPUtime=0 cores=1,3,5,7
/proc/21660/stat : 21660 (runWbo2sat.sh) S 21658 21660 19725 0 -1 4202496 358 0 0 0 0 0 0 0 20 0 1 0 287618891 9367552 275 33554432000 4194304 5064252 140737434247152 140737434246064 226084152910 0 65536 4100 65538 18446744071579302229 0 0 17 5 0 0 0 0 0
/proc/21660/statm: 2287 275 233 213 0 72 0

[startup+0.0344379 s]
/proc/loadavg: 2.03 2.01 2.00 3/179 21660
/proc/meminfo: memFree=27336404/32873648 swapFree=6864/6864
[pid=21660] ppid=21658 vsize=9148 CPUtime=0 cores=1,3,5,7
/proc/21660/stat : 21660 (runWbo2sat.sh) S 21658 21660 19725 0 -1 4202496 358 0 0 0 0 0 0 0 20 0 1 0 287618891 9367552 275 33554432000 4194304 5064252 140737434247152 140737434246064 226084152910 0 65536 4100 65538 18446744071579302229 0 0 17 5 0 0 0 0 0
/proc/21660/statm: 2287 275 233 213 0 72 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 9148

[startup+0.100208 s]
/proc/loadavg: 2.03 2.01 2.00 3/179 21660
/proc/meminfo: memFree=27336404/32873648 swapFree=6864/6864
[pid=21660] ppid=21658 vsize=9148 CPUtime=0 cores=1,3,5,7
/proc/21660/stat : 21660 (runWbo2sat.sh) S 21658 21660 19725 0 -1 4202496 358 0 0 0 0 0 0 0 20 0 1 0 287618891 9367552 275 33554432000 4194304 5064252 140737434247152 140737434246064 226084152910 0 65536 4100 65538 18446744071579302229 0 0 17 5 0 0 0 0 0
/proc/21660/statm: 2287 275 233 213 0 72 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 9148

[startup+0.300206 s]
/proc/loadavg: 2.03 2.01 2.00 3/179 21660
/proc/meminfo: memFree=27336404/32873648 swapFree=6864/6864
[pid=21660] ppid=21658 vsize=9148 CPUtime=0 cores=1,3,5,7
/proc/21660/stat : 21660 (runWbo2sat.sh) S 21658 21660 19725 0 -1 4202496 358 0 0 0 0 0 0 0 20 0 1 0 287618891 9367552 275 33554432000 4194304 5064252 140737434247152 140737434246064 226084152910 0 65536 4100 65538 18446744071579302229 0 0 17 5 0 0 0 0 0
/proc/21660/statm: 2287 275 233 213 0 72 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 9148

[startup+0.70025 s]
/proc/loadavg: 2.03 2.01 2.00 3/179 21660
/proc/meminfo: memFree=27336404/32873648 swapFree=6864/6864
[pid=21660] ppid=21658 vsize=9148 CPUtime=0 cores=1,3,5,7
/proc/21660/stat : 21660 (runWbo2sat.sh) S 21658 21660 19725 0 -1 4202496 358 0 0 0 0 0 0 0 20 0 1 0 287618891 9367552 275 33554432000 4194304 5064252 140737434247152 140737434246064 226084152910 0 65536 4100 65538 18446744071579302229 0 0 17 5 0 0 0 0 0
/proc/21660/statm: 2287 275 233 213 0 72 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 9148

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

[startup+0.900249 s]
/proc/loadavg: 2.03 2.01 2.00 3/179 21660
/proc/meminfo: memFree=27336404/32873648 swapFree=6864/6864
[pid=21660] ppid=21658 vsize=9148 CPUtime=0 cores=1,3,5,7
/proc/21660/stat : 21660 (runWbo2sat.sh) S 21658 21660 19725 0 -1 4202496 358 0 0 0 0 0 0 0 20 0 1 0 287618891 9367552 275 33554432000 4194304 5064252 140737434247152 140737434246064 226084152910 0 65536 4100 65538 18446744071579302229 0 0 17 5 0 0 0 0 0
/proc/21660/statm: 2287 275 233 213 0 72 0
Current children cumulated CPU time (s) 0
Current children cumulated vsize (KiB) 9148

[startup+1.00025 s]
/proc/loadavg: 2.03 2.01 2.00 3/183 21673
/proc/meminfo: memFree=27325204/32873648 swapFree=6864/6864
[pid=21660] ppid=21658 vsize=9148 CPUtime=0 cores=1,3,5,7
/proc/21660/stat : 21660 (runWbo2sat.sh) S 21658 21660 19725 0 -1 4202496 358 0 0 0 0 0 0 0 20 0 1 0 287618891 9367552 275 33554432000 4194304 5064252 140737434247152 140737434246064 226084152910 0 65536 4100 65538 18446744071579302229 0 0 17 5 0 0 0 0 0
/proc/21660/statm: 2287 275 233 213 0 72 0
[pid=21661] ppid=21660 vsize=8932 CPUtime=0.95 cores=1,3,5,7
/proc/21661/stat : 21661 (wbo2sat) R 21660 21660 19725 0 -1 4202496 108455 12528 0 0 44 20 28 3 20 0 1 0 287618891 9146368 1906 33554432000 4194304 5872148 140735729534048 140735729527320 5123914 0 65536 4102 0 0 0 0 17 3 0 0 0 0 0
/proc/21661/statm: 2233 1906 174 410 0 1815 0
Current children cumulated CPU time (s) 0.95
Current children cumulated vsize (KiB) 18080

Child status: 0
Real time (s): 1.01283
CPU time (s): 1.00885
CPU user time (s): 0.765883
CPU system time (s): 0.242963
CPU usage (%): 99.6068
Max. virtual memory (cumulated for all children) (KiB): 18080

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.765883
system time used= 0.242963
maximum resident set size= 282460
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 123948
page faults= 0
swaps= 0
block input operations= 0
block output operations= 11872
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 31
involuntary context switches= 25

runsolver used 0 second user time and 0.005999 second system time

The end

Launcher Data 

Begin job on node120 at 2012-05-28 16:22:09
IDJOB=3716446
IDBENCH=79348
IDSOLVER=2298
FILE ID=node120/3716446-1338214929
RUNJOBID= node120-1338194468-19742
PBS_JOBID= 14624598
Free space on /tmp= 71408 MiB

SOLVER NAME= wbo2sat 2012-05-19
BENCH NAME= PB10/normalized-PB10/PARTIAL-SMALLINT-LIN/wcsp/academics/normalized-send_wcsp.wbo
COMMAND LINE= DIR/runWbo2sat.sh BENCHNAME RANDOMSEED TMPDIR DIR
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3716446-1338214929/watcher-3716446-1338214929 -o /tmp/evaluation-result-3716446-1338214929/solver-3716446-1338214929 -C 1800 -W 1900 -M 15500  HOME/runWbo2sat.sh HOME/instance-3716446-1338214929.wbo 1305219085 HOME HOME

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

MD5SUM BENCH= 579550ba8a4368ea911c9080981cd647
RANDOM SEED=1305219085

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		: 2666.456
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	: 5332.91
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		: 2666.456
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	: 5331.91
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		: 2666.456
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	: 5331.92
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		: 2666.456
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	: 5331.88
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		: 2666.456
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	: 5331.91
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		: 2666.456
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	: 5331.83
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		: 2666.456
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	: 5331.91
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		: 2666.456
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	: 5331.91
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management:


/proc/meminfo:
MemTotal:       32873648 kB
MemFree:        27336296 kB
Buffers:          431176 kB
Cached:          3883812 kB
SwapCached:          636 kB
Active:          1538328 kB
Inactive:        3133696 kB
Active(anon):     345280 kB
Inactive(anon):    12532 kB
Active(file):    1193048 kB
Inactive(file):  3121164 kB
Unevictable:        6864 kB
Mlocked:            6864 kB
SwapTotal:      67108856 kB
SwapFree:       67107896 kB
Dirty:              8968 kB
Writeback:             0 kB
AnonPages:        410220 kB
Mapped:            15176 kB
Shmem:               120 kB
Slab:             725820 kB
SReclaimable:     170120 kB
SUnreclaim:       555700 kB
KernelStack:        1520 kB
PageTables:         4556 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    83545680 kB
Committed_AS:     561400 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      346400 kB
VmallocChunk:   34341988052 kB
HardwareCorrupted:     0 kB
AnonHugePages:    337920 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:        7680 kB
DirectMap2M:    33538048 kB

Free space on /tmp at the end= 71400 MiB
End job on node120 at 2012-05-28 16:22:10