Trace number 3096294

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 0.088985 0.092114

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v550-c2343-S927210717-059.SATISFIABLE.cnf
MD5SUM7954e0b477e9d5cbd0a1f159f4b0eef6
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.007998
Satisfiable
(Un)Satisfiability was proved
Number of variables550
Number of clauses2343
Sum of the clauses size7029
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 32343
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

0.01/0.09	c MultiFlip version 1.01 by Jingchao Chen,  Feb. 2011 
0.01/0.09	c input CNF file=HOME/instance-3096294-1301758365.cnf 
0.01/0.09	c var#=550 clause#=2343 
0.01/0.09	c clause#=2343 var#=550 ratio=4 
0.01/0.09	c Unsat#=         3 flip#=      2022 
0.01/0.09	c Unsat#=         2 flip#=      2202 
0.01/0.09	c Unsat#=         1 flip#=      6302 
0.01/0.09	c Unsat#=         0 flip#=     72733 
0.01/0.09	c try 1-th flip# 72733
0.01/0.09	c A solution is found
0.01/0.09	c verified 
0.01/0.09	s SATISFIABLE
0.01/0.09	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 
0.01/0.09	v 0
0.01/0.09	c Done (Running cputime is 0.083 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-3096294-1301758365/watcher-3096294-1301758365 -o /tmp/evaluation-result-3096294-1301758365/solver-3096294-1301758365 -C 2400 -W 1300 -M 7680 MultiFlip HOME/instance-3096294-1301758365.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: 3.79 3.97 3.89 4/184 15765
/proc/meminfo: memFree=21555716/32950928 swapFree=67111528/67111528
[pid=15765] ppid=15763 vsize=2984 CPUtime=0 cores=1,3
/proc/15765/stat : 15765 (MultiFlip) R 15763 15765 15327 0 -1 4202496 335 0 0 0 0 0 0 0 25 0 1 0 287435187 3055616 274 33554432000 134512640 134540672 4291125344 18446744073709551615 4524192 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/15765/statm: 746 274 215 7 0 103 0

[startup+0.0167591 s]
/proc/loadavg: 3.79 3.97 3.89 4/184 15765
/proc/meminfo: memFree=21555716/32950928 swapFree=67111528/67111528
[pid=15765] ppid=15763 vsize=3108 CPUtime=0.01 cores=1,3
/proc/15765/stat : 15765 (MultiFlip) R 15763 15765 15327 0 -1 4202496 369 0 0 0 1 0 0 0 25 0 1 0 287435187 3182592 307 33554432000 134512640 134540672 4291125344 18446744073709551615 134525376 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/15765/statm: 777 307 219 7 0 134 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 3108

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

[startup+0.0167591 s]
/proc/loadavg: 3.79 3.97 3.89 4/184 15765
/proc/meminfo: memFree=21555716/32950928 swapFree=67111528/67111528
[pid=15765] ppid=15763 vsize=3108 CPUtime=0.01 cores=1,3
/proc/15765/stat : 15765 (MultiFlip) R 15763 15765 15327 0 -1 4202496 369 0 0 0 1 0 0 0 25 0 1 0 287435187 3182592 307 33554432000 134512640 134540672 4291125344 18446744073709551615 134525376 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/15765/statm: 777 307 219 7 0 134 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 3108

Child status: 10
Real time (s): 0.092114
CPU time (s): 0.088985
CPU user time (s): 0.087986
CPU system time (s): 0.000999
CPU usage (%): 96.6031
Max. virtual memory (cumulated for all children) (KiB): 3108

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.087986
system time used= 0.000999
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 396
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 0.000999 second user time and 0.005999 second system time

The end

Launcher Data 

Begin job on node126 at 2011-04-02 17:32:45
IDJOB=3096294
IDBENCH=82976
IDSOLVER=1523
FILE ID=node126/3096294-1301758365
RUNJOBID= node126-1301757062-15347
PBS_JOBID= 12841073
Free space on /tmp= 71688 MiB

SOLVER NAME= MultiFlip 2011-02-11
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v550-c2343-S927210717-059.SATISFIABLE.cnf
COMMAND LINE= MultiFlip BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3096294-1301758365/watcher-3096294-1301758365 -o /tmp/evaluation-result-3096294-1301758365/solver-3096294-1301758365 -C 2400 -W 1300 -M 7680  MultiFlip HOME/instance-3096294-1301758365.cnf

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

MD5SUM BENCH= 7954e0b477e9d5cbd0a1f159f4b0eef6
RANDOM SEED=303372132

node126.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		: 2666.783
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	: 5333.56
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		: 2666.783
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		: 2666.783
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		: 2666.783
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	: 5332.74
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		: 2666.783
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	: 5332.80
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		: 2666.783
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	: 5332.75
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		: 2666.783
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	: 5332.82
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		: 2666.783
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:     32950928 kB
MemFree:      21555748 kB
Buffers:        349444 kB
Cached:       10712140 kB
SwapCached:          0 kB
Active:        7244356 kB
Inactive:      3882592 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32950928 kB
LowFree:      21555748 kB
SwapTotal:    67111528 kB
SwapFree:     67111528 kB
Dirty:              12 kB
Writeback:           0 kB
AnonPages:       65772 kB
Mapped:          16108 kB
Slab:           204116 kB
PageTables:       4780 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83586992 kB
Committed_AS:   230444 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= 71688 MiB
End job on node126 at 2011-04-02 17:32:45