Trace number 3096191

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 0.039041

General information on the benchmark

Namerandom/medium/
unif-k3-r4.26-v350-c1491-S1914191877-004.SATISFIABLE.cnf
MD5SUMb24f876b5044256ac72c44cf51bd3297
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.005998
Satisfiable
(Un)Satisfiability was proved
Number of variables350
Number of clauses1491
Sum of the clauses size4473
Maximum clause length3
Minimum clause length3
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 31491
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data 

0.01/0.03	c MultiFlip version 1.01 by Jingchao Chen,  Feb. 2011 
0.01/0.03	c input CNF file=HOME/instance-3096191-1301754283.cnf 
0.01/0.03	c var#=350 clause#=1491 
0.01/0.03	c clause#=1491 var#=350 ratio=4 
0.01/0.03	c Unsat#=         3 flip#=       868 
0.01/0.03	c Unsat#=         2 flip#=      1505 
0.01/0.03	c Unsat#=         1 flip#=      1585 
0.01/0.03	c Unsat#=         0 flip#=     12875 
0.01/0.03	c try 1-th flip# 12875
0.01/0.03	c A solution is found
0.01/0.03	c verified 
0.01/0.03	s SATISFIABLE
0.01/0.03	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 
0.01/0.03	v 0
0.01/0.03	c Done (Running cputime is 0.032 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-3096191-1301754283/watcher-3096191-1301754283 -o /tmp/evaluation-result-3096191-1301754283/solver-3096191-1301754283 -C 2400 -W 1300 -M 7680 MultiFlip HOME/instance-3096191-1301754283.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: 3.92 3.98 3.94 5/187 16344
/proc/meminfo: memFree=21699200/32951132 swapFree=67111528/67111528
[pid=16344] ppid=16342 vsize=2848 CPUtime=0 cores=1,3
/proc/16344/stat : 16344 (MultiFlip) R 16342 16344 15364 0 -1 4202496 334 0 0 0 0 0 0 0 25 0 1 0 287027917 2916352 272 33554432000 134512640 134540672 4291882416 18446744073709551615 134521424 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/16344/statm: 712 273 219 7 0 69 0

[startup+0.0198831 s]
/proc/loadavg: 3.92 3.98 3.94 5/187 16344
/proc/meminfo: memFree=21699200/32951132 swapFree=67111528/67111528
[pid=16344] ppid=16342 vsize=2980 CPUtime=0.01 cores=1,3
/proc/16344/stat : 16344 (MultiFlip) R 16342 16344 15364 0 -1 4202496 347 0 0 0 1 0 0 0 25 0 1 0 287027917 3051520 285 33554432000 134512640 134540672 4291882416 18446744073709551615 134524689 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/16344/statm: 745 285 219 7 0 102 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 2980

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

[startup+0.0198831 s]
/proc/loadavg: 3.92 3.98 3.94 5/187 16344
/proc/meminfo: memFree=21699200/32951132 swapFree=67111528/67111528
[pid=16344] ppid=16342 vsize=2980 CPUtime=0.01 cores=1,3
/proc/16344/stat : 16344 (MultiFlip) R 16342 16344 15364 0 -1 4202496 347 0 0 0 1 0 0 0 25 0 1 0 287027917 3051520 285 33554432000 134512640 134540672 4291882416 18446744073709551615 134524689 0 0 4096 0 0 0 0 17 1 0 0 0
/proc/16344/statm: 745 285 219 7 0 102 0
Current children cumulated CPU time (s) 0.01
Current children cumulated vsize (KiB) 2980

Child status: 10
Real time (s): 0.039041
CPU time (s): 0.036993
CPU user time (s): 0.033994
CPU system time (s): 0.002999
CPU usage (%): 94.7544
Max. virtual memory (cumulated for all children) (KiB): 2980

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.033994
system time used= 0.002999
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 369
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 0.002999 second user time and 0.002999 second system time

The end

Launcher Data 

Begin job on node131 at 2011-04-02 16:24:43
IDJOB=3096191
IDBENCH=82873
IDSOLVER=1523
FILE ID=node131/3096191-1301754283
RUNJOBID= node131-1301748568-15384
PBS_JOBID= 12841006
Free space on /tmp= 71660 MiB

SOLVER NAME= MultiFlip 2011-02-11
BENCH NAME= SAT11/random/medium/unif-k3-r4.26-v350-c1491-S1914191877-004.SATISFIABLE.cnf
COMMAND LINE= MultiFlip BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3096191-1301754283/watcher-3096191-1301754283 -o /tmp/evaluation-result-3096191-1301754283/solver-3096191-1301754283 -C 2400 -W 1300 -M 7680  MultiFlip HOME/instance-3096191-1301754283.cnf

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

MD5SUM BENCH= b24f876b5044256ac72c44cf51bd3297
RANDOM SEED=1269972588

node131.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		: 2666.830
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	: 5333.66
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		: 2666.830
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		: 2666.830
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	: 5332.83
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		: 2666.830
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		: 2666.830
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	: 5332.77
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		: 2666.830
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		: 2666.830
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		: 2666.830
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:     32951132 kB
MemFree:      21699224 kB
Buffers:        352028 kB
Cached:       10568568 kB
SwapCached:          0 kB
Active:        6789088 kB
Inactive:      4200168 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32951132 kB
LowFree:      21699224 kB
SwapTotal:    67111528 kB
SwapFree:     67111528 kB
Dirty:              60 kB
Writeback:          28 kB
AnonPages:       68832 kB
Mapped:          16392 kB
Slab:           199364 kB
PageTables:       4996 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83587092 kB
Committed_AS:   252988 kB
VmallocTotal: 34359738367 kB
VmallocUsed:    296000 kB
VmallocChunk: 34359440975 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 71660 MiB
End job on node131 at 2011-04-02 16:24:43