Trace number 3094327

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
MPhaseSAT 2011-02-15SAT 1.01084 1.01116

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v650-c2769-S1894319588-015.SATISFIABLE.cnf
MD5SUMc06f05996bba25e7e26c6579a49532fc
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.013997
Satisfiable
(Un)Satisfiability was proved
Number of variables650
Number of clauses2769
Sum of the clauses size8307
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 32769
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

1.00/1.01	c MPhaseSAT version 401 by Jingchao Chen,  April 1, 2011
1.00/1.01	c input CNF file=HOME/instance-3094327-1301753795.cnf 
1.00/1.01	c Clause#=2769  var#=650  ratio=4 
1.00/1.01	c Simplified clause#=2769 
1.00/1.01	c XOR_varElimination deleted var#=1 clauses#=2762 
1.00/1.01	c inative var#=0 
1.00/1.01	c free var#=627  
1.00/1.01	c local search on 
1.00/1.01	c A solution found by local search 
1.00/1.01	c unfixed var#=22 var#=650 
1.00/1.01	c verified 
1.00/1.01	c 
1.00/1.01	s SATISFIABLE
1.00/1.01	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 -412 413 415 416 417 418 419 -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 -622 623 624 625 626 628 -629 630 631 -632 -633 -634 -635 -636 637 -638 -639 -640 -641 -642 643 -644 645 -646 -647 648 649 650 
1.00/1.01	v 0
1.00/1.01	c 
1.00/1.01	c  Running time=1.008847

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-3094327-1301753795/watcher-3094327-1301753795 -o /tmp/evaluation-result-3094327-1301753795/solver-3094327-1301753795 -C 2400 -W 1300 -M 7680 MPhaseSAT HOME/instance-3094327-1301753795.cnf 

running on 2 cores: 5,7

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 3.97 3.91 4/189 31299
/proc/meminfo: memFree=20195144/32950940 swapFree=67111528/67111528
[pid=31299] ppid=31297 vsize=3160 CPUtime=0 cores=5,7
/proc/31299/stat : 31299 (MPhaseSAT) R 31297 31299 30604 0 -1 4202496 384 0 0 0 0 0 0 0 25 0 1 0 365610292 3235840 323 33554432000 134512640 134731564 4294342848 18446744073709551615 134578280 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/31299/statm: 790 323 237 54 0 100 0

[startup+0.0153969 s]
/proc/loadavg: 3.85 3.97 3.91 4/189 31299
/proc/meminfo: memFree=20195144/32950940 swapFree=67111528/67111528
[pid=31299] ppid=31297 vsize=3428 CPUtime=0.01 cores=5,7
/proc/31299/stat : 31299 (MPhaseSAT) R 31297 31299 30604 0 -1 4202496 472 0 0 0 1 0 0 0 25 0 1 0 365610292 3510272 410 33554432000 134512640 134731564 4294342848 18446744073709551615 134722293 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/31299/statm: 857 410 260 54 0 167 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 3428

[startup+0.100381 s]
/proc/loadavg: 3.85 3.97 3.91 4/189 31299
/proc/meminfo: memFree=20195144/32950940 swapFree=67111528/67111528
[pid=31299] ppid=31297 vsize=3824 CPUtime=0.09 cores=5,7
/proc/31299/stat : 31299 (MPhaseSAT) R 31297 31299 30604 0 -1 4202496 566 0 0 0 9 0 0 0 25 0 1 0 365610292 3915776 504 33554432000 134512640 134731564 4294342848 18446744073709551615 134659337 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/31299/statm: 956 504 269 54 0 266 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 3824

[startup+0.300345 s]
/proc/loadavg: 3.85 3.97 3.91 4/189 31299
/proc/meminfo: memFree=20195144/32950940 swapFree=67111528/67111528
[pid=31299] ppid=31297 vsize=3956 CPUtime=0.29 cores=5,7
/proc/31299/stat : 31299 (MPhaseSAT) R 31297 31299 30604 0 -1 4202496 615 0 0 0 29 0 0 0 25 0 1 0 365610292 4050944 553 33554432000 134512640 134731564 4294342848 18446744073709551615 134659320 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/31299/statm: 989 553 269 54 0 299 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 3956

[startup+0.700276 s]
/proc/loadavg: 3.85 3.97 3.91 4/189 31299
/proc/meminfo: memFree=20195144/32950940 swapFree=67111528/67111528
[pid=31299] ppid=31297 vsize=4352 CPUtime=0.69 cores=5,7
/proc/31299/stat : 31299 (MPhaseSAT) R 31297 31299 30604 0 -1 4202496 707 0 0 0 69 0 0 0 25 0 1 0 365610292 4456448 645 33554432000 134512640 134731564 4294342848 18446744073709551615 134715348 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/31299/statm: 1088 645 269 54 0 398 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 4352

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

[startup+0.90024 s]
/proc/loadavg: 3.85 3.97 3.91 4/189 31299
/proc/meminfo: memFree=20195144/32950940 swapFree=67111528/67111528
[pid=31299] ppid=31297 vsize=4352 CPUtime=0.89 cores=5,7
/proc/31299/stat : 31299 (MPhaseSAT) R 31297 31299 30604 0 -1 4202496 718 0 0 0 89 0 0 0 25 0 1 0 365610292 4456448 656 33554432000 134512640 134731564 4294342848 18446744073709551615 134717142 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/31299/statm: 1088 656 269 54 0 398 0
Current children cumulated CPU time (s) 0.89
Current children cumulated vsize (KiB) 4352

[startup+1.00022 s]
/proc/loadavg: 3.85 3.97 3.91 5/190 31327
/proc/meminfo: memFree=20195392/32950940 swapFree=67111528/67111528
[pid=31299] ppid=31297 vsize=4616 CPUtime=1 cores=5,7
/proc/31299/stat : 31299 (MPhaseSAT) R 31297 31299 30604 0 -1 4202496 766 0 0 0 100 0 0 0 25 0 1 0 365610292 4726784 704 33554432000 134512640 134731564 4294342848 18446744073709551615 134605531 0 0 4096 1026 0 0 0 17 5 0 0 0
/proc/31299/statm: 1154 704 272 54 0 464 0
Current children cumulated CPU time (s) 1
Current children cumulated vsize (KiB) 4616

Child status: 10
Real time (s): 1.01116
CPU time (s): 1.01084
CPU user time (s): 1.00885
CPU system time (s): 0.001999
CPU usage (%): 99.9685
Max. virtual memory (cumulated for all children) (KiB): 4616

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 1.00885
system time used= 0.001999
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 776
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= 6
involuntary context switches= 5

runsolver used 0.004999 second user time and 0.005999 second system time

The end

Launcher Data 

Begin job on node117 at 2011-04-02 16:16:35
IDJOB=3094327
IDBENCH=82809
IDSOLVER=1520
FILE ID=node117/3094327-1301753795
RUNJOBID= node117-1301748570-30625
PBS_JOBID= 12841020
Free space on /tmp= 71436 MiB

SOLVER NAME= MPhaseSAT 2011-02-15
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v650-c2769-S1894319588-015.SATISFIABLE.cnf
COMMAND LINE= MPhaseSAT BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3094327-1301753795/watcher-3094327-1301753795 -o /tmp/evaluation-result-3094327-1301753795/solver-3094327-1301753795 -C 2400 -W 1300 -M 7680  MPhaseSAT HOME/instance-3094327-1301753795.cnf

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

MD5SUM BENCH= c06f05996bba25e7e26c6579a49532fc
RANDOM SEED=1362012858

node117.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		: 2666.849
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		: 2666.849
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		: 2666.849
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		: 2666.849
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	: 5332.75
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		: 2666.849
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		: 2666.849
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	: 5332.74
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		: 2666.849
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		: 2666.849
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	: 5267.44
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32950940 kB
MemFree:      20195424 kB
Buffers:        384444 kB
Cached:       11997552 kB
SwapCached:          0 kB
Active:        7907276 kB
Inactive:      4547444 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32950940 kB
LowFree:      20195424 kB
SwapTotal:    67111528 kB
SwapFree:     67111528 kB
Dirty:            1368 kB
Writeback:           0 kB
AnonPages:       72540 kB
Mapped:          16760 kB
Slab:           238300 kB
PageTables:       5204 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83586996 kB
Committed_AS:   254992 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= 71436 MiB
End job on node117 at 2011-04-02 16:16:36