Trace number 3096410

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 0.267959 0.270206

General information on the benchmark

Namerandom/medium/
unif-k5-r21.3-v100-c2130-S332580795-055.SATISFIABLE.cnf
MD5SUM1e018578440519156ef15a041316c93e
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkSAT
Best CPU time to get the best result obtained on this benchmark0.05599
Satisfiable
(Un)Satisfiability was proved
Number of variables100
Number of clauses2130
Sum of the clauses size10650
Maximum clause length5
Minimum clause length5
Number of clauses of size 10
Number of clauses of size 20
Number of clauses of size 30
Number of clauses of size 40
Number of clauses of size 52130
Number of clauses of size over 50

Solver Data 

0.19/0.27	c MultiFlip version 1.01 by Jingchao Chen,  Feb. 2011 
0.19/0.27	c input CNF file=HOME/instance-3096410-1301760985.cnf 
0.19/0.27	c var#=100 clause#=2130 
0.19/0.27	c clause#=2130 var#=100 ratio=21 
0.19/0.27	c Unsat#=         3 flip#=       213 
0.19/0.27	c Unsat#=         2 flip#=       984 
0.19/0.27	c Unsat#=         1 flip#=       986 
0.19/0.27	c Unsat#=         0 flip#=    103572 
0.19/0.27	c try 1-th flip# 103572
0.19/0.27	c A solution is found
0.19/0.27	c verified 
0.19/0.27	s SATISFIABLE
0.19/0.27	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 
0.19/0.27	v 0
0.19/0.27	c Done (Running cputime is 0.243 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-3096410-1301760985/watcher-3096410-1301760985 -o /tmp/evaluation-result-3096410-1301760985/solver-3096410-1301760985 -C 2400 -W 1300 -M 7680 MultiFlip HOME/instance-3096410-1301760985.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: 3.87 3.97 3.94 4/189 16352
/proc/meminfo: memFree=21553620/32950928 swapFree=67111528/67111528
[pid=16352] ppid=16350 vsize=2980 CPUtime=0 cores=0,2
/proc/16352/stat : 16352 (MultiFlip) R 16350 16352 15327 0 -1 4202496 344 0 0 0 0 0 0 0 25 0 1 0 287697195 3051520 283 33554432000 134512640 134540672 4293917504 18446744073709551615 4650492 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/16352/statm: 745 283 217 7 0 102 0

[startup+0.0976031 s]
/proc/loadavg: 3.87 3.97 3.94 4/189 16352
/proc/meminfo: memFree=21553620/32950928 swapFree=67111528/67111528
[pid=16352] ppid=16350 vsize=2980 CPUtime=0.09 cores=0,2
/proc/16352/stat : 16352 (MultiFlip) R 16350 16352 15327 0 -1 4202496 363 0 0 0 9 0 0 0 25 0 1 0 287697195 3051520 302 33554432000 134512640 134540672 4293917504 18446744073709551615 134524142 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/16352/statm: 745 302 220 7 0 102 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 2980

[startup+0.100602 s]
/proc/loadavg: 3.87 3.97 3.94 4/189 16352
/proc/meminfo: memFree=21553620/32950928 swapFree=67111528/67111528
[pid=16352] ppid=16350 vsize=2980 CPUtime=0.09 cores=0,2
/proc/16352/stat : 16352 (MultiFlip) R 16350 16352 15327 0 -1 4202496 363 0 0 0 9 0 0 0 25 0 1 0 287697195 3051520 302 33554432000 134512640 134540672 4293917504 18446744073709551615 134524145 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/16352/statm: 745 302 220 7 0 102 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 2980

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

[startup+0.200586 s]
/proc/loadavg: 3.87 3.97 3.94 4/189 16352
/proc/meminfo: memFree=21553620/32950928 swapFree=67111528/67111528
[pid=16352] ppid=16350 vsize=2980 CPUtime=0.19 cores=0,2
/proc/16352/stat : 16352 (MultiFlip) R 16350 16352 15327 0 -1 4202496 363 0 0 0 19 0 0 0 25 0 1 0 287697195 3051520 302 33554432000 134512640 134540672 4293917504 18446744073709551615 134524247 0 0 4096 0 0 0 0 17 0 0 0 0
/proc/16352/statm: 745 302 220 7 0 102 0
Current children cumulated CPU time (s) 0.19
Current children cumulated vsize (KiB) 2980

Child status: 10
Real time (s): 0.270206
CPU time (s): 0.267959
CPU user time (s): 0.267959
CPU system time (s): 0
CPU usage (%): 99.1684
Max. virtual memory (cumulated for all children) (KiB): 2980

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 0.267959
system time used= 0
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 389
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 0.004999 second system time

The end

Launcher Data 

Begin job on node126 at 2011-04-02 18:16:25
IDJOB=3096410
IDBENCH=83092
IDSOLVER=1523
FILE ID=node126/3096410-1301760985
RUNJOBID= node126-1301757062-15345
PBS_JOBID= 12841073
Free space on /tmp= 71688 MiB

SOLVER NAME= MultiFlip 2011-02-11
BENCH NAME= SAT11/random/medium/unif-k5-r21.3-v100-c2130-S332580795-055.SATISFIABLE.cnf
COMMAND LINE= MultiFlip BENCHNAME
RUNSOLVER COMMAND LINE= BIN/runsolver --timestamp -w /tmp/evaluation-result-3096410-1301760985/watcher-3096410-1301760985 -o /tmp/evaluation-result-3096410-1301760985/solver-3096410-1301760985 -C 2400 -W 1300 -M 7680  MultiFlip HOME/instance-3096410-1301760985.cnf

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

MD5SUM BENCH= 1e018578440519156ef15a041316c93e
RANDOM SEED=537308746

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:      21553884 kB
Buffers:        350272 kB
Cached:       10712572 kB
SwapCached:          0 kB
Active:        7247160 kB
Inactive:      3882908 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:     32950928 kB
LowFree:      21553884 kB
SwapTotal:    67111528 kB
SwapFree:     67111528 kB
Dirty:             764 kB
Writeback:           0 kB
AnonPages:       67264 kB
Mapped:          16240 kB
Slab:           204676 kB
PageTables:       5372 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:  83586992 kB
Committed_AS:   251228 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 18:16:25