Trace number 3096138

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 0.062989 0.063691

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v450-c1917-S1915396418-078.SATISFIABLE.cnf
MD5SUM6f66bb3f92a8c8e75d9af481af0c129f
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.003999
Satisfiable
(Un)Satisfiability was proved
Number of variables450
Number of clauses1917
Sum of the clauses size5751
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 31917
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

0.00/0.06	c MultiFlip version 1.01 by Jingchao Chen,  Feb. 2011 
0.00/0.06	c input CNF file=HOME/instance-3096138-1301753783.cnf 
0.00/0.06	c var#=450 clause#=1917 
0.00/0.06	c clause#=1917 var#=450 ratio=4 
0.00/0.06	c Unsat#=         3 flip#=      1695 
0.00/0.06	c Unsat#=         2 flip#=      1918 
0.00/0.06	c Unsat#=         1 flip#=      2410 
0.00/0.06	c Unsat#=         0 flip#=     42343 
0.00/0.06	c try 1-th flip# 42343
0.00/0.06	c A solution is found
0.00/0.06	c verified 
0.00/0.06	s SATISFIABLE
0.00/0.06	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 
0.00/0.06	v 0
0.00/0.06	c Done (Running cputime is 0.056 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-3096138-1301753783/watcher-3096138-1301753783 -o /tmp/evaluation-result-3096138-1301753783/solver-3096138-1301753783 -C 2400 -W 1300 -M 7680 MultiFlip HOME/instance-3096138-1301753783.cnf 

running on 2 cores: 0,2

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: 3.93 3.99 3.94 5/189 16707
/proc/meminfo: memFree=22018404/32951124 swapFree=67111528/67111528
[pid=16707] ppid=16705 vsize=2980 CPUtime=0 cores=0,2
/proc/16707/stat : 16707 (MultiFlip) R 16705 16707 15854 0 -1 4202496 358 0 0 0 0 0 0 0 25 0 1 0 267794134 3051520 297 33554432000 134512640 134540672 4289601760 18446744073709551615 8693244 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/16707/statm: 745 297 219 7 0 102 0

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

Child status: 10
Real time (s): 0.063691
CPU time (s): 0.062989
CPU user time (s): 0.06199
CPU system time (s): 0.000999
CPU usage (%): 98.8978
Max. virtual memory (cumulated for all children) (KiB): 0

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.06199
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= 382
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= 1

runsolver used 0.002999 second user time and 0.002999 second system time

The end

Launcher Data 

Begin job on node145 at 2011-04-02 16:16:23
IDJOB=3096138
IDBENCH=82820
IDSOLVER=1523
FILE ID=node145/3096138-1301753783
RUNJOBID= node145-1301748567-15872
PBS_JOBID= 12840994
Free space on /tmp= 72360 MiB

SOLVER NAME= MultiFlip 2011-02-11
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v450-c1917-S1915396418-078.SATISFIABLE.cnf
COMMAND LINE= MultiFlip BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3096138-1301753783/watcher-3096138-1301753783 -o /tmp/evaluation-result-3096138-1301753783/solver-3096138-1301753783 -C 2400 -W 1300 -M 7680  MultiFlip HOME/instance-3096138-1301753783.cnf

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

MD5SUM BENCH= 6f66bb3f92a8c8e75d9af481af0c129f
RANDOM SEED=699978485

node145.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		: 2666.786
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	: 5333.57
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		: 2666.786
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	: 5332.76
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		: 2666.786
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		: 2666.786
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	: 5332.83
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		: 2666.786
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		: 2666.786
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		: 2666.786
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	: 5332.84
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		: 2666.786
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	: 5332.77
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32951124 kB
MemFree:      22018560 kB
Buffers:        357204 kB
Cached:       10251404 kB
SwapCached:          0 kB
Active:        6819976 kB
Inactive:      3855896 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      22018560 kB
SwapTotal:    67111528 kB
SwapFree:     67111528 kB
Dirty:              24 kB
Writeback:           0 kB
AnonPages:       67328 kB
Mapped:          16156 kB
Slab:           192012 kB
PageTables:       5180 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS:   248688 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= 72360 MiB
End job on node145 at 2011-04-02 16:16:23