Trace number 3096336

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 0.078987 0.0798859

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v500-c2130-S831119356-083.SATISFIABLE.cnf
MD5SUM0ac8a1d876c0f6cbfe96d1c05d468900
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.002999
Satisfiable
(Un)Satisfiability was proved
Number of variables500
Number of clauses2130
Sum of the clauses size6390
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 32130
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

0.06/0.07	c MultiFlip version 1.01 by Jingchao Chen,  Feb. 2011 
0.06/0.07	c input CNF file=HOME/instance-3096336-1301759455.cnf 
0.06/0.07	c var#=500 clause#=2130 
0.06/0.07	c clause#=2130 var#=500 ratio=4 
0.06/0.07	c Unsat#=         3 flip#=      6328 
0.06/0.07	c Unsat#=         2 flip#=      6438 
0.06/0.07	c Unsat#=         1 flip#=     69872 
0.06/0.07	c Unsat#=         0 flip#=     70748 
0.06/0.07	c try 1-th flip# 70748
0.06/0.07	c A solution is found
0.06/0.07	c verified 
0.06/0.07	s SATISFIABLE
0.06/0.07	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 
0.06/0.07	v 0
0.06/0.07	c Done (Running cputime is 0.072 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-3096336-1301759455/watcher-3096336-1301759455 -o /tmp/evaluation-result-3096336-1301759455/solver-3096336-1301759455 -C 2400 -W 1300 -M 7680 MultiFlip HOME/instance-3096336-1301759455.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: 4.01 4.00 3.93 2/185 26933
/proc/meminfo: memFree=21347492/32951124 swapFree=67111528/67111528
[pid=26933] ppid=26931 vsize=2980 CPUtime=0 cores=1,3
/proc/26933/stat : 26933 (MultiFlip) R 26931 26933 26496 0 -1 4202496 357 0 0 0 0 0 0 0 23 0 1 0 268361368 3051520 296 33554432000 134512640 134540672 4288062176 18446744073709551615 3819004 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/26933/statm: 745 297 219 7 0 102 0

[startup+0.069307 s]
/proc/loadavg: 4.01 4.00 3.93 2/185 26933
/proc/meminfo: memFree=21347492/32951124 swapFree=67111528/67111528
[pid=26933] ppid=26931 vsize=2980 CPUtime=0.06 cores=1,3
/proc/26933/stat : 26933 (MultiFlip) R 26931 26933 26496 0 -1 4202496 367 0 0 0 6 0 0 0 23 0 1 0 268361368 3051520 306 33554432000 134512640 134540672 4288062176 18446744073709551615 134523879 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/26933/statm: 745 306 220 7 0 102 0
Current children cumulated CPU time (s) 0.06
Current children cumulated vsize (KiB) 2980

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

[startup+0.069307 s]
/proc/loadavg: 4.01 4.00 3.93 2/185 26933
/proc/meminfo: memFree=21347492/32951124 swapFree=67111528/67111528
[pid=26933] ppid=26931 vsize=2980 CPUtime=0.06 cores=1,3
/proc/26933/stat : 26933 (MultiFlip) R 26931 26933 26496 0 -1 4202496 367 0 0 0 6 0 0 0 23 0 1 0 268361368 3051520 306 33554432000 134512640 134540672 4288062176 18446744073709551615 134523879 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/26933/statm: 745 306 220 7 0 102 0
Current children cumulated CPU time (s) 0.06
Current children cumulated vsize (KiB) 2980

Child status: 10
Real time (s): 0.0798859
CPU time (s): 0.078987
CPU user time (s): 0.077988
CPU system time (s): 0.000999
CPU usage (%): 98.8748
Max. virtual memory (cumulated for all children) (KiB): 2980

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.077988
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= 388
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= 12
involuntary context switches= 0

runsolver used 0.001999 second user time and 0.003999 second system time

The end

Launcher Data 

Begin job on node147 at 2011-04-02 17:50:55
IDJOB=3096336
IDBENCH=83018
IDSOLVER=1523
FILE ID=node147/3096336-1301759455
RUNJOBID= node147-1301756850-26516
PBS_JOBID= 12841062
Free space on /tmp= 71756 MiB

SOLVER NAME= MultiFlip 2011-02-11
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v500-c2130-S831119356-083.SATISFIABLE.cnf
COMMAND LINE= MultiFlip BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3096336-1301759455/watcher-3096336-1301759455 -o /tmp/evaluation-result-3096336-1301759455/solver-3096336-1301759455 -C 2400 -W 1300 -M 7680  MultiFlip HOME/instance-3096336-1301759455.cnf

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

MD5SUM BENCH= 0ac8a1d876c0f6cbfe96d1c05d468900
RANDOM SEED=730385296

node147.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		: 2666.836
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	: 5333.67
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		: 2666.836
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		: 2666.836
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	: 5332.82
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		: 2666.836
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		: 2666.836
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	: 5332.82
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		: 2666.836
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	: 5332.76
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		: 2666.836
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		: 2666.836
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	: 5332.75
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32951124 kB
MemFree:      21347756 kB
Buffers:        358364 kB
Cached:       10908784 kB
SwapCached:          0 kB
Active:        7078784 kB
Inactive:      4256512 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      21347756 kB
SwapTotal:    67111528 kB
SwapFree:     67111528 kB
Dirty:              16 kB
Writeback:           0 kB
AnonPages:       68024 kB
Mapped:          16100 kB
Slab:           205700 kB
PageTables:       5132 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS:   270556 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= 71756 MiB
End job on node147 at 2011-04-02 17:50:55