Trace number 371932

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, and are wall clock time (not CPU 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
March KS 2007-02-08UNSAT 1.3268 1.32908

General information on the benchmark

Namerandom/2+p/p0.7/v5500/
unif2p-p0.7-v5500-c14685-S1110066181-15-UNSAT.cnf
MD5SUM02ac0323b8681994481799266f6a3a32
Bench CategoryRANDOM (random instances)
Best result obtained on this benchmarkUNSAT
Best CPU time to get the best result obtained on this benchmark0.171973
Satisfiable
(Un)Satisfiability was proved
Number of variables5496
Number of clauses14684
Sum of the clauses size39647
Maximum clause length3
Minimum clause length2
Number of clauses of size 10
Number of clauses of size 24405
Number of clauses of size 310279
Number of clauses of size 40
Number of clauses of size 50
Number of clauses of size over 50

Solver Data (download as text)

0.09/0.19	c main():: ***                                   [ march satisfiability solver ]                                   ***
0.09/0.19	c main()::  **            Copyright (C) 2001-2004 M. Dufour, M. Heule, J. van Zwieten and H. van Maaren            **
0.09/0.19	c main()::   * This program may be redistributed and/or modified under the terms of the GNU Gereral Public License *
0.09/0.19	c main()::
0.09/0.19	c initFormula():: searching for DIMACS p-line....
0.09/0.19	c initFormula():: the DIMACS p-line indicates a CNF of 5500 variables and 14684 clauses.
0.09/0.19	c parseCNF():: parsing....
0.09/0.19	c parseCNF():: the CNF contains 0 unary clauses.
0.09/0.19	c runParser():: parsing was successful, warming up engines...
0.09/0.19	c simplify_formula():: removed 0 tautological, 1120 satisfied and 0 duplicate clauses
0.09/0.19	c preprocessing fase I completed:: there are now 5169 free variables and 13564 clauses.
0.09/0.19	c stat :: sign balance is biased by 0.705
0.09/0.19	c shorten_equivalence(): average equivalence length reduced from nan to nan
0.09/0.19	c using 3-SAT heuristics (occurence based diff)
0.09/0.19	c longest clause has size 3
0.09/0.19	c simplify_formula():: removed 0 tautological, 0 satisfied and 34 duplicate clauses
0.09/0.19	c resolvent_look() :: found 16 resolvents
0.09/0.19	c lessRedundantTransformation():: nothing to be done.
0.09/0.19	c transformTo3SAT():: you gave me 5500 variables and 13580 clauses.
0.09/0.19	c transformTo3SAT():: by the way, the maximal clause length before transformation was 3.
0.09/0.19	c transformTo3SAT():: I will add 0 variables and 0 clauses!
0.09/0.19	c transformTo3SAT():: the transformation yielded 5500 variabels and 13580 clauses.
0.09/0.19	c main():: clause / variable ratio: ( 13580 / 5500 ) = 2.47
0.09/0.19	c longest clause has size 3
0.09/0.19	c simplify_formula():: removed 0 tautological, 0 satisfied and 0 duplicate clauses
0.09/0.19	c dynamic_preselect_setsize :: on
0.09/0.19	c suggested doublelook initial :: 0
0.09/0.19	c main():: all systems go!
0.09/0.19	c |----------------------------------------------------------------|
c |********************************
c |************************************************
c |****************************************************************| 0 NC: 5 JD: 0
1.29/1.32	c |----------------------------------------------------------------|
c |
1.29/1.32	c
1.29/1.32	c main():: nodeCount: 5
1.29/1.32	c main():: dead ends in main: 0
1.29/1.32	c main():: lookAheadCount: 107877
1.29/1.32	c main():: unitResolveCount: 652
1.29/1.32	c main():: time=1.320000
1.29/1.32	c main():: necessary_assignments: 5
1.29/1.32	c main():: bin_sat: 0, bin_unsat 0
1.29/1.32	c main():: doublelook: #: 211, succes #: 153
1.29/1.32	c main():: doublelook: overall 0.196 of all possible doublelooks executed
1.29/1.32	c main():: doublelook: succesrate: 72.512, average DL_trigger: 14939.746
1.29/1.32	s UNSATISFIABLE

Verifier Data (download as text)

No possible verification on an UNSAT instance

Watcher Data (download as text)

runsolver version 3.2.3 (c) roussel@cril.univ-artois.fr

command line: runsolver --timestamp -w ROOT/results/node48/watcher-371932-1177548951 -o ROOT/results/node48/solver-371932-1177548951 -C 5000 -W 7500 -M 1800 --output-limit 1,15 /tmp/evaluation/371932-1177548951/march_ks /tmp/evaluation/371932-1177548951/instance-371932-1177548951.cnf 

Enforcing CPUTime limit (soft limit, will send SIGTERM then SIGKILL): 5000 seconds
Enforcing CPUTime limit (hard limit, will send SIGXCPU): 5030 seconds
Enforcing wall clock limit (soft limit, will send SIGTERM then SIGKILL): 7500 seconds
Enforcing VSIZE limit (soft limit, will send SIGTERM then SIGKILL): 1843200 KiB
Enforcing VSIZE limit (hard limit, stack expansion will fail with SIGSEGV, brk() and mmap() will return ENOMEM): 1894400 KiB
Solver output will be limited to a maximum of 15728640 bytes. The first 1048576 bytes and the last 14680064 bytes will be preserved
Current StackSize limit: 10240 KiB


[startup+0 s]
/proc/loadavg: 0.91 0.95 0.90 3/64 12956
/proc/meminfo: memFree=1709168/2055920 swapFree=4183868/4192956
[pid=12956] ppid=12954 vsize=1200 CPUtime=0
/proc/12956/stat : 12956 (march_ks) R 12954 12956 12576 0 -1 4194304 201 0 0 0 0 0 0 0 18 0 1 0 109740415 1228800 187 18446744073709551615 134512640 135019032 4294956672 18446744073709551615 134662703 0 0 4096 0 0 0 0 17 1 0 0
/proc/12956/statm: 300 187 47 123 0 175 0

[startup+0.050066 s]
/proc/loadavg: 0.91 0.95 0.90 3/64 12956
/proc/meminfo: memFree=1709168/2055920 swapFree=4183868/4192956
[pid=12956] ppid=12954 vsize=2376 CPUtime=0.04
/proc/12956/stat : 12956 (march_ks) R 12954 12956 12576 0 -1 4194304 699 0 0 0 4 0 0 0 18 0 1 0 109740415 2433024 411 18446744073709551615 134512640 135019032 4294956672 18446744073709551615 134661572 0 0 4096 0 0 0 0 17 1 0 0
/proc/12956/statm: 594 411 52 123 0 469 0
Current children cumulated CPU time (s) 0.04
Current children cumulated vsize (KiB) 2376

[startup+0.10107 s]
/proc/loadavg: 0.91 0.95 0.90 3/64 12956
/proc/meminfo: memFree=1709168/2055920 swapFree=4183868/4192956
[pid=12956] ppid=12954 vsize=2440 CPUtime=0.09
/proc/12956/stat : 12956 (march_ks) R 12954 12956 12576 0 -1 4194304 1083 0 0 0 9 0 0 0 18 0 1 0 109740415 2498560 427 18446744073709551615 134512640 135019032 4294956672 18446744073709551615 134554589 0 0 4096 0 0 0 0 17 1 0 0
/proc/12956/statm: 610 427 52 123 0 485 0
Current children cumulated CPU time (s) 0.09
Current children cumulated vsize (KiB) 2440

[startup+0.301088 s]
/proc/loadavg: 0.91 0.95 0.90 3/64 12956
/proc/meminfo: memFree=1709168/2055920 swapFree=4183868/4192956
[pid=12956] ppid=12954 vsize=6508 CPUtime=0.29
/proc/12956/stat : 12956 (march_ks) R 12954 12956 12576 0 -1 4194304 2968 0 0 0 28 1 0 0 19 0 1 0 109740415 6664192 1408 18446744073709551615 134512640 135019032 4294956672 18446744073709551615 134526454 0 0 4096 0 0 0 0 17 1 0 0
/proc/12956/statm: 1627 1408 72 123 0 1502 0
Current children cumulated CPU time (s) 0.29
Current children cumulated vsize (KiB) 6508

[startup+0.701125 s]
/proc/loadavg: 0.91 0.95 0.90 3/64 12956
/proc/meminfo: memFree=1709168/2055920 swapFree=4183868/4192956
[pid=12956] ppid=12954 vsize=6508 CPUtime=0.69
/proc/12956/stat : 12956 (march_ks) R 12954 12956 12576 0 -1 4194304 2968 0 0 0 68 1 0 0 22 0 1 0 109740415 6664192 1408 18446744073709551615 134512640 135019032 4294956672 18446744073709551615 134526443 0 0 4096 0 0 0 0 17 1 0 0
/proc/12956/statm: 1627 1408 72 123 0 1502 0
Current children cumulated CPU time (s) 0.69
Current children cumulated vsize (KiB) 6508

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

[startup+1.10516 s]
/proc/loadavg: 0.91 0.95 0.90 2/65 12957
/proc/meminfo: memFree=1703720/2055920 swapFree=4183868/4192956
[pid=12956] ppid=12954 vsize=6640 CPUtime=1.09
/proc/12956/stat : 12956 (march_ks) R 12954 12956 12576 0 -1 4194304 2996 0 0 0 108 1 0 0 25 0 1 0 109740415 6799360 1436 18446744073709551615 134512640 135019032 4294956672 18446744073709551615 134538162 0 0 4096 0 0 0 0 17 1 0 0
/proc/12956/statm: 1660 1436 73 123 0 1535 0
Current children cumulated CPU time (s) 1.09
Current children cumulated vsize (KiB) 6640

[startup+1.30118 s]
/proc/loadavg: 0.91 0.95 0.90 2/65 12957
/proc/meminfo: memFree=1703720/2055920 swapFree=4183868/4192956
[pid=12956] ppid=12954 vsize=6756 CPUtime=1.29
/proc/12956/stat : 12956 (march_ks) R 12954 12956 12576 0 -1 4194304 3003 0 0 0 128 1 0 0 25 0 1 0 109740415 6918144 1443 18446744073709551615 134512640 135019032 4294956672 18446744073709551615 134526471 0 0 4096 0 0 0 0 17 1 0 0
/proc/12956/statm: 1689 1443 73 123 0 1564 0
Current children cumulated CPU time (s) 1.29
Current children cumulated vsize (KiB) 6756

Child status: 20
Real time (s): 1.32908
CPU time (s): 1.3268
CPU user time (s): 1.3118
CPU system time (s): 0.014997
CPU usage (%): 99.8285
Max. virtual memory (cumulated for all children) (KiB): 6756

getrusage(RUSAGE_CHILDREN,...) data:
user time used= 1.3118
system time used= 0.014997
maximum resident set size= 0
integral shared memory size= 0
integral unshared data size= 0
integral unshared stack size= 0
page reclaims= 3004
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= 8
involuntary context switches= 2

runsolver used 0.002999 second user time and 0.007998 second system time

The end

Launcher Data (download as text)

Begin job on node48 on Thu Apr 26 00:55:51 UTC 2007

IDJOB= 371932
IDBENCH= 20232
IDSOLVER= 180
FILE ID= node48/371932-1177548951

PBS_JOBID= 4696590

Free space on /tmp= 66484 MiB

SOLVER NAME= March KS 2007-02-08
BENCH NAME= HOME/pub/bench/SAT07/random/2+p/p0.7/v5500/unif2p-p0.7-v5500-c14685-S1110066181-15-UNSAT.cnf
COMMAND LINE= /tmp/evaluation/371932-1177548951/march_ks /tmp/evaluation/371932-1177548951/instance-371932-1177548951.cnf            
RUNSOLVER COMMAND LINE= runsolver  --timestamp  -w ROOT/results/node48/watcher-371932-1177548951 -o ROOT/results/node48/solver-371932-1177548951 -C 5000 -W 7500 -M 1800 --output-limit 1,15  /tmp/evaluation/371932-1177548951/march_ks /tmp/evaluation/371932-1177548951/instance-371932-1177548951.cnf            

META MD5SUM SOLVER= d41d8cd98f00b204e9800998ecf8427e
MD5SUM BENCH=  02ac0323b8681994481799266f6a3a32

RANDOM SEED= 842295934

TIME LIMIT= 5000 seconds
MEMORY LIMIT= 1800 MiB

Linux node48.alineos.net 2.6.9-22.EL.rootsmp #1 SMP Mon Oct 3 08:59:52 CEST 2005 x86_64 x86_64 x86_64 GNU/Linux

/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 15
model		: 4
model name	:                   Intel(R) Xeon(TM) CPU 3.00GHz
stepping	: 3
cpu MHz		: 3000.238
cache size	: 2048 KB
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
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 lm pni monitor ds_cpl cid cx16 xtpr
bogomips	: 5914.62
clflush size	: 64
cache_alignment	: 128
address sizes	: 36 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 15
model		: 4
model name	:                   Intel(R) Xeon(TM) CPU 3.00GHz
stepping	: 3
cpu MHz		: 3000.238
cache size	: 2048 KB
fpu		: yes
fpu_exception	: yes
cpuid level	: 5
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 lm pni monitor ds_cpl cid cx16 xtpr
bogomips	: 5586.94
clflush size	: 64
cache_alignment	: 128
address sizes	: 36 bits physical, 48 bits virtual
power management:


/proc/meminfo:
MemTotal:      2055920 kB
MemFree:       1709576 kB
Buffers:         27068 kB
Cached:         264932 kB
SwapCached:       3528 kB
Active:         156204 kB
Inactive:       146844 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055920 kB
LowFree:       1709576 kB
SwapTotal:     4192956 kB
SwapFree:      4183868 kB
Dirty:            2488 kB
Writeback:           0 kB
Mapped:          16368 kB
Slab:            29288 kB
Committed_AS:  1222024 kB
PageTables:       1396 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264952 kB
VmallocChunk: 536605679 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:     2048 kB

Free space on /tmp at the end= 66484 MiB

End job on node48 on Thu Apr 26 00:55:53 UTC 2007