Trace number 3377679

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
borg-sat 11.03.02-seq-random (fixed)SAT 0.610906 0.93597

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v700-c2982-S115072124-051.SATISFIABLE.cnf
MD5SUM6052486ba02fcb82855c9fc5130e5550
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.095985
Satisfiable
(Un)Satisfiability was proved
Number of variables700
Number of clauses2982
Sum of the clauses size8946
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 32982
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

0.38/0.72	c INFO: loaded portfolio from HOME/etc/borg-mix+class.random.pickle
0.38/0.72	c INFO: solving HOME/instance-3377679-1305456829.cnf
0.38/0.72	c INFO: computing task features
0.38/0.73	c INFO: computed variable-clause graph statistics
0.38/0.73	c INFO: computed clause balance statistics
0.38/0.78	c INFO: computed variable balance statistics
0.38/0.82	c INFO: computed small-clause counts
0.38/0.82	c INFO: computed Horn-clause counts
0.38/0.83	c INFO: computed variable graph statistics
0.38/0.83	c INFO: collected features for HOME/instance-3377679-1305456829.cnf in 0.11 s
0.49/0.84	c INFO: running gnovelty+2@0 for 97 with 2399 remaining (b = 0.58)
0.51/0.91	s SATISFIABLE
0.51/0.91	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 -441 -442 443 444 -445 446 447 -448 449 450 -451 -452 -453 -454 -455 456 -457 458 -459 -460 461 462 463 464 465 -466 467 -468 469 -470 -471 472 473 474 -475 -476 -477 -478 -479 -480 481 -482 -483 -484 485 -486 487 -488 489 -490 -491 -492 493 494 495 496 -497 -498 499 -500 501 502 503 504 505 -506 -507 -508 509 -510 -511 -512 -513 -514 515 -516 -517 518 519 -520 -521 -522 -523 524 525 526 527 -528 529 -530 -531 532 533 534 535 536 -537 538 539 540 541 542 -543 544 -545 546 547 548 -549 -550 -551 552 553 554 -555 556 -557 558 -559 -560 561 562 -563 564 -565 -566 567 -568 -569 -570 571 -572 573 -574 575 -576 -577 -578 579 -580 581 -582 -583 -584 585 586 -587 588 589 -590 591 -592 -593 594 -595 -596 -597 598 -599 -600 601 -602 -603 -604 605 606 -607 -608 -609 610 -611 -612 613 -614 -615 616 -617 618 -619 620 -621 -622 623 624 -625 -626 627 628 -629 630 -631 -632 633 634 -635 -636 637 638 639 640 641 -642 643 644 -645 646 647 648 -649 650 -651 652 653 654 -655 656 -657 658 659 -660 661 662 -663 664 -665 666 667 -668 669 -670 -671 672 -673 -674 -675 -676 -677 678 -679 -680 681 -682 -683 684 -685 -686 -687 -688 689 690 691 692 -693 694 -695 -696 697 698 699 -700 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-3377679-1305456829/watcher-3377679-1305456829 -o /tmp/evaluation-result-3377679-1305456829/solver-3377679-1305456829 -C 2400 -W 1300 -M 7680 python HOME/solve HOME/etc/borg-mix+class.random.pickle HOME/instance-3377679-1305456829.cnf -seed 1598203726 -budget 2400 

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: 3.94 4.03 3.52 5/412 6861
/proc/meminfo: memFree=20713840/32951124 swapFree=67111348/67111528
[pid=6861] ppid=6859 vsize=15776 CPUtime=0 cores=0,2
/proc/6861/stat : 6861 (python) S 6859 6861 5042 0 -1 4202496 902 0 0 0 0 0 0 0 17 0 1 0 638099032 16154624 784 33554432000 4194304 5683644 140734466677072 18446744073709551615 255106766848 0 2147483391 16781312 2 18446744071699199166 0 0 17 0 0 0 0
/proc/6861/statm: 3944 784 346 364 0 431 0

[startup+0.0963849 s]
/proc/loadavg: 3.94 4.03 3.52 5/412 6861
/proc/meminfo: memFree=20713840/32951124 swapFree=67111348/67111528
[pid=6861] ppid=6859 vsize=84524 CPUtime=0.05 cores=0,2
/proc/6861/stat : 6861 (python) S 6859 6861 5042 0 -1 4202496 2271 0 0 0 4 1 0 0 17 0 1 0 638099032 86552576 2017 33554432000 4194304 5683644 140734466677072 18446744073709551615 255106795292 0 0 16781312 2 0 0 0 17 2 0 0 0
/proc/6861/statm: 21131 2017 633 364 0 1335 0
Current children cumulated CPU time (s) 0.05
Current children cumulated vsize (KiB) 84524

[startup+0.102544 s]
/proc/loadavg: 3.94 4.03 3.52 5/412 6861
/proc/meminfo: memFree=20713840/32951124 swapFree=67111348/67111528
[pid=6861] ppid=6859 vsize=85620 CPUtime=0.06 cores=0,2
/proc/6861/stat : 6861 (python) S 6859 6861 5042 0 -1 4202496 2628 0 0 0 5 1 0 0 17 0 1 0 638099032 87674880 2348 33554432000 4194304 5683644 140734466677072 18446744073709551615 255106766848 0 2147483391 16781312 2 18446744071699945619 0 0 17 2 0 0 0
/proc/6861/statm: 21405 2348 713 364 0 1622 0
Current children cumulated CPU time (s) 0.06
Current children cumulated vsize (KiB) 85620

[startup+0.302086 s]
/proc/loadavg: 3.94 4.03 3.52 5/412 6861
/proc/meminfo: memFree=20713840/32951124 swapFree=67111348/67111528
[pid=6861] ppid=6859 vsize=135748 CPUtime=0.16 cores=0,2
/proc/6861/stat : 6861 (python) S 6859 6861 5042 0 -1 4202496 5967 934 1 0 12 4 0 0 17 0 1 0 638099032 139005952 4149 33554432000 4194304 5683644 140734466677072 18446744073709551615 255106764805 0 2147483391 16781312 2 18446744071699945619 0 0 17 2 0 0 0
/proc/6861/statm: 33937 4149 1032 364 0 3123 0
Current children cumulated CPU time (s) 0.16
Current children cumulated vsize (KiB) 135748

[startup+0.700969 s]
/proc/loadavg: 3.94 4.03 3.52 5/412 6861
/proc/meminfo: memFree=20713840/32951124 swapFree=67111348/67111528
[pid=6861] ppid=6859 vsize=259460 CPUtime=0.38 cores=0,2
/proc/6861/stat : 6861 (python) S 6859 6861 5042 0 -1 4202496 8692 934 1 0 29 9 0 0 16 0 1 0 638099032 265687040 6479 33554432000 4194304 5683644 140734466677072 18446744073709551615 255106766848 0 2147483391 16781312 2 18446744071699199166 0 0 17 2 0 0 0
/proc/6861/statm: 64865 6479 1656 364 0 5223 0
Current children cumulated CPU time (s) 0.38
Current children cumulated vsize (KiB) 259460

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

[startup+0.900988 s]
/proc/loadavg: 3.94 4.03 3.52 5/412 6861
/proc/meminfo: memFree=20713840/32951124 swapFree=67111348/67111528
[pid=6861] ppid=6859 vsize=288856 CPUtime=0.51 cores=0,2
/proc/6861/stat : 6861 (python) S 6859 6861 5042 0 -1 4202496 9816 934 1 0 42 9 0 0 18 0 2 0 638099032 295788544 7101 33554432000 4194304 5683644 140734466677072 18446744073709551615 255118595531 0 0 16781312 2 18446744073709551615 0 0 17 2 0 0 0
/proc/6861/statm: 72214 7101 1875 364 0 8132 0
Current children cumulated CPU time (s) 0.51
Current children cumulated vsize (KiB) 288856

Child status: 0
Real time (s): 0.93597
CPU time (s): 0.610906
CPU user time (s): 0.500923
CPU system time (s): 0.109983
CPU usage (%): 65.2698
Max. virtual memory (cumulated for all children) (KiB): 288856

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.500923
system time used= 0.109983
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 16740
page faults= 1
swaps= 0
block input operations= 0
block output operations= 0
messages sent= 0
messages received= 0
signals received= 0
voluntary context switches= 11439
involuntary context switches= 33

runsolver used 0.008998 second user time and 0.017997 second system time

The end

Launcher Data 

Begin job on node144 at 2011-05-15 12:53:49
IDJOB=3377679
IDBENCH=82988
IDSOLVER=1857
FILE ID=node144/3377679-1305456829
RUNJOBID= node144-1305455526-6439
PBS_JOBID= 13324838
Free space on /tmp= 73192 MiB

SOLVER NAME= borg-sat 11.03.02-seq-random (fixed)
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v700-c2982-S115072124-051.SATISFIABLE.cnf
COMMAND LINE= python DIR/solve DIR/etc/borg-mix+class.random.pickle BENCHNAME -seed RANDOMSEED -budget TIMEOUT
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3377679-1305456829/watcher-3377679-1305456829 -o /tmp/evaluation-result-3377679-1305456829/solver-3377679-1305456829 -C 2400 -W 1300 -M 7680  python HOME/solve HOME/etc/borg-mix+class.random.pickle HOME/instance-3377679-1305456829.cnf -seed 1598203726 -budget 2400

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

MD5SUM BENCH= 6052486ba02fcb82855c9fc5130e5550
RANDOM SEED=1598203726

node144.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		: 2666.850
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	: 5333.70
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		: 2666.850
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	: 5226.16
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		: 2666.850
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		: 2666.850
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		: 2666.850
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		: 2666.850
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	: 5332.82
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		: 2666.850
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		: 2666.850
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	: 5332.76
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32951124 kB
MemFree:      20714368 kB
Buffers:        306696 kB
Cached:        3982616 kB
SwapCached:          0 kB
Active:        8991764 kB
Inactive:      2882672 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      20714368 kB
SwapTotal:    67111528 kB
SwapFree:     67111348 kB
Dirty:           63740 kB
Writeback:           0 kB
AnonPages:     7584440 kB
Mapped:          36688 kB
Slab:           250284 kB
PageTables:      46716 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS: 93827692 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= 73128 MiB
End job on node144 at 2011-05-15 12:53:50