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 in four parts:
  1. 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 provide some useful information on the computer.
  2. 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 !
  3. 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 1200 seconds. 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 1230 seconds which will send a SIGXPU to the solver. The last limit is on the virtual memory used by the process (900Mb).
    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.
  4. 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.

General information on the benchmark

Nameweb/www.ps.uni-sb.de/~walser/benchmarks/course-ass/normalized-ss97-6.opb
MD5SUM5d90b7cbb5bac2aa14257b9c5448f25d
Bench Categoryoptimization, small integers (OPTSMALLINT)
Has Objective FunctionYES
SatisfiableYES
(Un)Satisfiability was provedYES
Best value of the objective function 304
Optimality of the best value was proved YES
Number of terms in the objective function 173
Biggest coefficient in the objective function 100
Number of bits for the biggest coefficient in the objective function 7
Sum of the numbers in the objective function 8448
Number of bits of the sum of numbers in the objective function 14
Biggest number in a constraint 100
Number of bits of the biggest number in a constraint 7
Biggest sum of numbers in a constraint 8448
Number of bits of the biggest sum of numbers14
Best result obtained on this benchmarkOPTIMUM FOUND
Best CPU time to get the best result obtained on this benchmark1.87471
Number of variables257
Total number of constraints353
Number of constraints which are clauses0
Number of constraints which are cardinality constraints (but not clauses)353
Number of constraints which are nor clauses,nor cardinality constraints0
Minimum length of a constraint1
Maximum length of a constraint44

Trace number 9824

Launcher Data

LAUNCH ON wulflinc26 THE 2005-09-23 15:48:45 (client local time)
PB2005-SCRIPT v4.0 
MARKUPS: idlaunch=8589 boxname=wulflinc26 idbench=385 idsolver=8 numberseed=0
MD5SUM SOLVER: 
MD5SUM BENCH:  5d90b7cbb5bac2aa14257b9c5448f25d  /oldhome/oroussel/tmp/wulflinc26/normalized-ss97-6.opb
REAL COMMAND:  pb2sat /oldhome/oroussel/tmp/wulflinc26/normalized-ss97-6.opb
IDLAUNCH: 8589
/proc/cpuinfo:
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.055
cache size	: 512 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips	: 888.83

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 7
model name	: Pentium III (Katmai)
stepping	: 3
cpu MHz		: 451.055
cache size	: 512 KB
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips	: 899.07

/proc/meminfo:
MemTotal:      1034660 kB
MemFree:        926644 kB
Buffers:         11012 kB
Cached:          80380 kB
SwapCached:          0 kB
Active:          44156 kB
Inactive:        50076 kB
HighTotal:      131008 kB
HighFree:        47768 kB
LowTotal:       903652 kB
LowFree:        878876 kB
SwapTotal:     2097892 kB
SwapFree:      2097892 kB
Dirty:              28 kB
Writeback:           0 kB
Mapped:           6972 kB
Slab:             8288 kB
Committed_AS:    63656 kB
PageTables:        328 kB
VmallocTotal:   114680 kB
VmallocUsed:      1368 kB
VmallocChunk:   113252 kB
JOB ENDED THE 2005-09-23 15:48:52 (client local time) WITH STATUS 30 IN 6.81896 SECONDS
stats: 8589 0 6.81896 30

Solver Data

c This solver internally uses Chaff 2004.11.15 Simplified
c running zchaff...
c got solution with objective value: 2825
c small objective detected
c CONFLICT during preprocess 
c [startup+1.44741 s]  setting bit 13 to 0
c CONFLICT during preprocess 
c [startup+1.54208 s]  setting bit 12 to 0
c got solution with objective value: 702
c [startup+2.78747 s]  setting bit 11 to 1
c CONFLICT during preprocess 
c [startup+2.88599 s]  setting bit 10 to 0
c [startup+3.00378 s]  setting bit 9 to 0
c got solution with objective value: 498
c [startup+3.22946 s]  setting bit 8 to 1
c [startup+5.0268 s]  setting bit 7 to 0
c got solution with objective value: 399
c [startup+5.222 s]  setting bit 6 to 1
c got solution with objective value: 398
c [startup+5.40199 s]  setting bit 5 to 1
c got solution with objective value: 397
c [startup+5.58056 s]  setting bit 4 to 1
c got solution with objective value: 397
c [startup+5.75779 s]  setting bit 3 to 1
c got solution with objective value: 396
c [startup+5.94098 s]  setting bit 2 to 1
c got solution with objective value: 394
c [startup+6.21796 s]  setting bit 1 to 1
c got solution with objective value: 393
c [startup+6.85977 s]  setting bit 0 to 1
s OPTIMUM FOUND
v one -v1 -v10 -v100 -v101 -v102 -v103 -v104 -v105 -v106 -v107 -v108 -v109 -v11 -v110 v111 -v112 -v113 -v114 -v115 -v116 v117 v118 -v119 v12 v120 v121 -v122 -v123 v124 -v125 v126 -v127 -v128 v129 v13 v130 v131 v132 v133 -v134 -v135 -v136 -v137 v138 -v139 -v14 -v140 -v141 v142 -v143 -v144 -v145 -v146 -v147 v148 -v149 -v15 v150 -v151 v152 v153 v154 -v155 -v156 -v157 -v158 -v159 -v16 -v160 -v161 -v162 v163 -v164 -v165 v166 v167 -v168 -v169 -v17 -v170 v171 -v172 -v173 -v174 -v175 -v176 v177 -v178 v179 -v18 v180 v181 v182 v183 -v184 v185 -v186 v187 v188 -v189 v19 -v190 -v191 v192 v193 v194 v195 -v196 -v197 -v198 -v199 v2 -v20 v200 -v201 -v202 -v203 v204 v205 -v206 v207 -v208 -v209 -v21 -v210 v211 v212 v213 v214 v215 -v216 -v217 v218 -v219 -v22 -v220 -v221 -v222 -v223 v224 -v225 v226 -v227 -v228 v229 -v23 v230 v231 -v232 -v233 -v234 -v235 v236 v237 v238 v239 -v24 -v240 v241 v242 v243 -v244 -v245 v246 -v247 v248 v249 -v25 v250 -v251 -v252 -v253 -v254 -v255 v256 v26 -v27 -v28 -v29 v3 -v30 -v31 -v32 -v33 -v34 -v35 -v36 v37 -v38 -v39 -v4 v40 -v41 -v42 -v43 -v44 -v45 -v46 -v47 v48 -v49 v5 -v50 -v51 -v52 -v53 -v54 -v55 -v56 -v57 v58 v59 -v6 -v60 v61 -v62 -v63 -v64 -v65 -v66 -v67 v68 v69 v7 -v70 v71 v72 -v73 -v74 -v75 -v76 -v77 -v78 -v79 v8 -v80 -v81 -v82 -v83 -v84 -v85 -v86 -v87 -v88 -v89 v9 -v90 -v91 -v92 -v93 -v94 -v95 -v96 -v97 -v98 v99

Watcher Data

Enforcing CPU limit (will send SIGTERM then SIGKILL): 1200 seconds
Enforcing CPUTime (will send SIGXCPU) limit: 1230 seconds
Enforcing Stack size limit: 67108864 bytes
Enforcing memory limit (will send SIGTERM then SIGKILL): 921600 Kb
Enforcing VSIZE limit: 994918400 bytes
Current StackSize limit: 67108864 bytes
Raw data (/proc/7494/stat): 7494 (pb2sat) R 7493 7494 4005 0 -1 0 18 0 0 0 0 0 0 0 23 0 1 0 21355500 1527808 2 4294967295 134512640 135987407 3221224576 3221224576 134512928 0 0 5 0 0 0 0 17 1 0 0
Raw data (/proc/7494/statm): 373 2 364 364 0 9 0
[pid=7494] vsize: 1492
open syscall for file /oldhome/oroussel/tmp/wulflinc26/normalized-ss97-6.opb
One traced child (pid=7494) exited with status: 30
All traced children have exited ! Game is over.

Child status: 30
Real time (s): 6.91989
CPU time (s): 6.81896
CPU user time (s): 6.63399
CPU system time (s): 0.184971
CPU usage (%): 98.5415
Max. virtual memory (cumulated for all children) (Kb): 0

Verifier Data

Verifier:	OK	304