Trace number 3096326

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
MultiFlip 2011-02-11SAT 0.061989 0.0615809

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v650-c2769-S4140122-004.SATISFIABLE.cnf
MD5SUM2b3c7a221faca9e629eac8ef7f1b0cd7
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.031995
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 

0.04/0.06	c MultiFlip version 1.01 by Jingchao Chen,  Feb. 2011 
0.04/0.06	c input CNF file=HOME/instance-3096326-1301759239.cnf 
0.04/0.06	c var#=650 clause#=2769 
0.04/0.06	c clause#=2769 var#=650 ratio=4 
0.04/0.06	c Unsat#=         3 flip#=      7611 
0.04/0.06	c Unsat#=         2 flip#=     10801 
0.04/0.06	c Unsat#=         1 flip#=     11428 
0.04/0.06	c Unsat#=         0 flip#=     14623 
0.04/0.06	c try 1-th flip# 14623
0.04/0.06	c A solution is found
0.04/0.06	c verified 
0.04/0.06	s SATISFIABLE
0.04/0.06	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 
0.04/0.06	v 0
0.04/0.06	c Done (Running cputime is 0.053 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-3096326-1301759239/watcher-3096326-1301759239 -o /tmp/evaluation-result-3096326-1301759239/solver-3096326-1301759239 -C 2400 -W 1300 -M 7680 MultiFlip HOME/instance-3096326-1301759239.cnf 

running on 2 cores: 4,6

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: 3.96 3.99 3.94 4/189 25594
/proc/meminfo: memFree=23164340/32951124 swapFree=67111524/67111528
[pid=25594] ppid=25592 vsize=3112 CPUtime=0 cores=4,6
/proc/25594/stat : 25594 (MultiFlip) R 25592 25594 24832 0 -1 4202496 371 0 0 0 0 0 0 0 25 0 1 0 287521867 3186688 309 33554432000 134512640 134540672 4292270240 18446744073709551615 12506620 0 0 4096 0 0 0 0 17 4 0 0 0
/proc/25594/statm: 778 310 219 7 0 135 0

[startup+0.0514621 s]
/proc/loadavg: 3.96 3.99 3.94 4/189 25594
/proc/meminfo: memFree=23164340/32951124 swapFree=67111524/67111528
[pid=25594] ppid=25592 vsize=3112 CPUtime=0.04 cores=4,6
/proc/25594/stat : 25594 (MultiFlip) R 25592 25594 24832 0 -1 4202496 378 0 0 0 4 0 0 0 25 0 1 0 287521867 3186688 316 33554432000 134512640 134540672 4292270240 18446744073709551615 134524754 0 0 4096 0 0 0 0 17 4 0 0 0
/proc/25594/statm: 778 316 219 7 0 135 0
Current children cumulated CPU time (s) 0.04
Current children cumulated vsize (KiB) 3112

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

[startup+0.0514621 s]
/proc/loadavg: 3.96 3.99 3.94 4/189 25594
/proc/meminfo: memFree=23164340/32951124 swapFree=67111524/67111528
[pid=25594] ppid=25592 vsize=3112 CPUtime=0.04 cores=4,6
/proc/25594/stat : 25594 (MultiFlip) R 25592 25594 24832 0 -1 4202496 378 0 0 0 4 0 0 0 25 0 1 0 287521867 3186688 316 33554432000 134512640 134540672 4292270240 18446744073709551615 134524754 0 0 4096 0 0 0 0 17 4 0 0 0
/proc/25594/statm: 778 316 219 7 0 135 0
Current children cumulated CPU time (s) 0.04
Current children cumulated vsize (KiB) 3112

Child status: 10
Real time (s): 0.0615809
CPU time (s): 0.061989
CPU user time (s): 0.05999
CPU system time (s): 0.001999
CPU usage (%): 100.663
Max. virtual memory (cumulated for all children) (KiB): 3112

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.05999
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= 409
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= 1

runsolver used 0.002999 second user time and 0.002999 second system time

The end

Launcher Data 

Begin job on node136 at 2011-04-02 17:47:19
IDJOB=3096326
IDBENCH=83008
IDSOLVER=1523
FILE ID=node136/3096326-1301759239
RUNJOBID= node136-1301756587-24851
PBS_JOBID= 12841051
Free space on /tmp= 71508 MiB

SOLVER NAME= MultiFlip 2011-02-11
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v650-c2769-S4140122-004.SATISFIABLE.cnf
COMMAND LINE= MultiFlip BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3096326-1301759239/watcher-3096326-1301759239 -o /tmp/evaluation-result-3096326-1301759239/solver-3096326-1301759239 -C 2400 -W 1300 -M 7680  MultiFlip HOME/instance-3096326-1301759239.cnf

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

MD5SUM BENCH= 2b3c7a221faca9e629eac8ef7f1b0cd7
RANDOM SEED=1399909910

node136.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		: 2666.809
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	: 5333.61
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		: 2666.809
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		: 2666.809
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		: 2666.809
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	: 5332.76
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		: 2666.809
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		: 2666.809
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		: 2666.809
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		: 2666.809
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:      23164620 kB
Buffers:        312732 kB
Cached:        9141292 kB
SwapCached:          4 kB
Active:        4255680 kB
Inactive:      5265996 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      23164620 kB
SwapTotal:    67111528 kB
SwapFree:     67111524 kB
Dirty:             248 kB
Writeback:           0 kB
AnonPages:       67592 kB
Mapped:          16172 kB
Slab:           201340 kB
PageTables:       5272 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS:   252704 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= 71508 MiB
End job on node136 at 2011-04-02 17:47:19