Trace number 3096256

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 0.076988 0.0780799

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v600-c2556-S727005963-093.SATISFIABLE.cnf
MD5SUM91e4bda9499071fffccca1352d82691f
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.017996
Satisfiable
(Un)Satisfiability was proved
Number of variables600
Number of clauses2556
Sum of the clauses size7668
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 32556
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

0.03/0.07	c MultiFlip version 1.01 by Jingchao Chen,  Feb. 2011 
0.03/0.07	c input CNF file=HOME/instance-3096256-1301757890.cnf 
0.03/0.07	c var#=600 clause#=2556 
0.03/0.07	c clause#=2556 var#=600 ratio=4 
0.03/0.07	c Unsat#=         3 flip#=      7500 
0.03/0.07	c Unsat#=         2 flip#=      8149 
0.03/0.07	c Unsat#=         1 flip#=      9193 
0.03/0.07	c Unsat#=         0 flip#=     35481 
0.03/0.07	c try 1-th flip# 35481
0.03/0.07	c A solution is found
0.03/0.07	c verified 
0.03/0.07	s SATISFIABLE
0.03/0.07	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 
0.03/0.07	v 0
0.03/0.07	c Done (Running cputime is 0.071 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-3096256-1301757890/watcher-3096256-1301757890 -o /tmp/evaluation-result-3096256-1301757890/solver-3096256-1301757890 -C 2400 -W 1300 -M 7680 MultiFlip HOME/instance-3096256-1301757890.cnf 

running on 2 cores: 1,3

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: 4.00 4.00 3.91 3/187 25123
/proc/meminfo: memFree=23167576/32951124 swapFree=67111524/67111528
[pid=25123] ppid=25121 vsize=3112 CPUtime=0 cores=1,3
/proc/25123/stat : 25123 (MultiFlip) R 25121 25123 24832 0 -1 4202496 373 0 0 0 0 0 0 0 25 0 1 0 287386955 3186688 311 33554432000 134512640 134540672 4292917648 18446744073709551615 12506620 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/25123/statm: 778 311 219 7 0 135 0

[startup+0.0355009 s]
/proc/loadavg: 4.00 4.00 3.91 3/187 25123
/proc/meminfo: memFree=23167576/32951124 swapFree=67111524/67111528
[pid=25123] ppid=25121 vsize=3112 CPUtime=0.03 cores=1,3
/proc/25123/stat : 25123 (MultiFlip) R 25121 25123 24832 0 -1 4202496 373 0 0 0 3 0 0 0 25 0 1 0 287386955 3186688 311 33554432000 134512640 134540672 4292917648 18446744073709551615 134524713 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/25123/statm: 778 311 219 7 0 135 0
Current children cumulated CPU time (s) 0.03
Current children cumulated vsize (KiB) 3112

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

[startup+0.0355009 s]
/proc/loadavg: 4.00 4.00 3.91 3/187 25123
/proc/meminfo: memFree=23167576/32951124 swapFree=67111524/67111528
[pid=25123] ppid=25121 vsize=3112 CPUtime=0.03 cores=1,3
/proc/25123/stat : 25123 (MultiFlip) R 25121 25123 24832 0 -1 4202496 373 0 0 0 3 0 0 0 25 0 1 0 287386955 3186688 311 33554432000 134512640 134540672 4292917648 18446744073709551615 134524713 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/25123/statm: 778 311 219 7 0 135 0
Current children cumulated CPU time (s) 0.03
Current children cumulated vsize (KiB) 3112

Child status: 10
Real time (s): 0.0780799
CPU time (s): 0.076988
CPU user time (s): 0.076988
CPU system time (s): 0
CPU usage (%): 98.6016
Max. virtual memory (cumulated for all children) (KiB): 3112

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.076988
system time used= 0
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 403
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= 3

runsolver used 0.000999 second user time and 0.004999 second system time

The end

Launcher Data 

Begin job on node136 at 2011-04-02 17:24:50
IDJOB=3096256
IDBENCH=82938
IDSOLVER=1523
FILE ID=node136/3096256-1301757890
RUNJOBID= node136-1301756587-24852
PBS_JOBID= 12841051
Free space on /tmp= 71508 MiB

SOLVER NAME= MultiFlip 2011-02-11
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v600-c2556-S727005963-093.SATISFIABLE.cnf
COMMAND LINE= MultiFlip BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3096256-1301757890/watcher-3096256-1301757890 -o /tmp/evaluation-result-3096256-1301757890/solver-3096256-1301757890 -C 2400 -W 1300 -M 7680  MultiFlip HOME/instance-3096256-1301757890.cnf

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

MD5SUM BENCH= 91e4bda9499071fffccca1352d82691f
RANDOM SEED=331759699

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:      23167840 kB
Buffers:        312184 kB
Cached:        9140848 kB
SwapCached:          4 kB
Active:        4252864 kB
Inactive:      5265608 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      23167840 kB
SwapTotal:    67111528 kB
SwapFree:     67111524 kB
Dirty:             176 kB
Writeback:           0 kB
AnonPages:       64932 kB
Mapped:          16052 kB
Slab:           201384 kB
PageTables:       4360 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS:   252120 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 17:24:50