Trace number 3096177

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 0.036993 0.0370061

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v400-c1704-S1462223811-042.SATISFIABLE.cnf
MD5SUMcd0b1f588aad9c4aef9bf4b7912f7c0d
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.004999
Satisfiable
(Un)Satisfiability was proved
Number of variables400
Number of clauses1704
Sum of the clauses size5112
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 31704
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

0.00/0.03	c MultiFlip version 1.01 by Jingchao Chen,  Feb. 2011 
0.00/0.03	c input CNF file=HOME/instance-3096177-1301754054.cnf 
0.00/0.03	c var#=400 clause#=1704 
0.00/0.03	c clause#=1704 var#=400 ratio=4 
0.00/0.03	c Unsat#=         3 flip#=       740 
0.00/0.03	c Unsat#=         2 flip#=      2577 
0.00/0.03	c Unsat#=         1 flip#=      6640 
0.00/0.03	c Unsat#=         0 flip#=      6641 
0.00/0.03	c try 1-th flip# 6641
0.00/0.03	c A solution is found
0.00/0.03	c verified 
0.00/0.03	s SATISFIABLE
0.00/0.03	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 
0.00/0.03	v 0
0.00/0.03	c Done (Running cputime is 0.031 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-3096177-1301754054/watcher-3096177-1301754054 -o /tmp/evaluation-result-3096177-1301754054/solver-3096177-1301754054 -C 2400 -W 1300 -M 7680 MultiFlip HOME/instance-3096177-1301754054.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: 4.01 4.00 3.93 4/189 24272
/proc/meminfo: memFree=20911368/32951124 swapFree=67111524/67111528
[pid=24272] ppid=24270 vsize=2980 CPUtime=0 cores=4,6
/proc/24272/stat : 24272 (MultiFlip) R 24270 24272 23275 0 -1 4202496 353 0 0 0 0 0 0 0 25 0 1 0 365635846 3051520 292 33554432000 134512640 134540672 4291803552 18446744073709551615 134524695 0 0 4096 0 0 0 0 17 4 0 0 0
/proc/24272/statm: 745 292 219 7 0 102 0

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

Child status: 10
Real time (s): 0.0370061
CPU time (s): 0.036993
CPU user time (s): 0.034994
CPU system time (s): 0.001999
CPU usage (%): 99.9647
Max. virtual memory (cumulated for all children) (KiB): 0

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.034994
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= 376
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= 0

runsolver used 0.000999 second user time and 0.005999 second system time

The end

Launcher Data 

Begin job on node111 at 2011-04-02 16:20:54
IDJOB=3096177
IDBENCH=82859
IDSOLVER=1523
FILE ID=node111/3096177-1301754054
RUNJOBID= node111-1301748572-23294
PBS_JOBID= 12841026
Free space on /tmp= 71244 MiB

SOLVER NAME= MultiFlip 2011-02-11
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v400-c1704-S1462223811-042.SATISFIABLE.cnf
COMMAND LINE= MultiFlip BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3096177-1301754054/watcher-3096177-1301754054 -o /tmp/evaluation-result-3096177-1301754054/solver-3096177-1301754054 -C 2400 -W 1300 -M 7680  MultiFlip HOME/instance-3096177-1301754054.cnf

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

MD5SUM BENCH= cd0b1f588aad9c4aef9bf4b7912f7c0d
RANDOM SEED=1032570647

node111.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		: 2666.849
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	: 5333.69
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		: 2666.849
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	: 5428.12
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		: 2666.849
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		: 2666.849
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	: 5332.86
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		: 2666.849
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		: 2666.849
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		: 2666.849
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	: 5332.67
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		: 2666.849
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	: 5332.83
clflush size	: 64
cache_alignment	: 64
address sizes	: 40 bits physical, 48 bits virtual
power management: [8]


/proc/meminfo:
MemTotal:     32951124 kB
MemFree:      20911648 kB
Buffers:        349412 kB
Cached:       11326260 kB
SwapCached:          4 kB
Active:        7285596 kB
Inactive:      4459728 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951124 kB
LowFree:      20911648 kB
SwapTotal:    67111528 kB
SwapFree:     67111524 kB
Dirty:              28 kB
Writeback:           0 kB
AnonPages:       69520 kB
Mapped:          16152 kB
Slab:           230356 kB
PageTables:       5224 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587088 kB
Committed_AS:   253840 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= 71244 MiB
End job on node111 at 2011-04-02 16:20:54