Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:11:30 2013 Optimize a model with 8280 rows, 12040 columns and 40020 nonzeros Presolve removed 60 rows and 40 columns Presolve time: 0.19s Presolved: 8220 rows, 12000 columns, 31960 nonzeros Variable types: 8020 continuous, 3980 integer (3980 binary) Root relaxation: objective 3.894400e+04, 3469 iterations, 0.26 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38944.0027 0 2 - 38944.0027 - - 0s H 0 0 39442.131435 38944.0027 1.26% - 0s 0 0 39057.5450 0 2 39442.1314 39057.5450 0.98% - 0s 0 0 39061.8674 0 2 39442.1314 39061.8674 0.96% - 0s 0 0 39070.4027 0 2 39442.1314 39070.4027 0.94% - 0s 0 0 39080.7359 0 2 39442.1314 39080.7359 0.92% - 0s 0 0 39083.3384 0 2 39442.1314 39083.3384 0.91% - 1s 0 0 39083.3384 0 2 39442.1314 39083.3384 0.91% - 1s 0 0 39083.3384 0 2 39442.1314 39083.3384 0.91% - 1s 0 0 39083.3384 0 2 39442.1314 39083.3384 0.91% - 1s 0 0 39083.3384 0 2 39442.1314 39083.3384 0.91% - 1s 0 0 39083.3384 0 2 39442.1314 39083.3384 0.91% - 1s 0 0 39083.3384 0 2 39442.1314 39083.3384 0.91% - 1s 0 0 39083.3384 0 2 39442.1314 39083.3384 0.91% - 1s 0 0 39084.7812 0 3 39442.1314 39084.7812 0.91% - 1s 0 0 39084.9983 0 2 39442.1314 39084.9983 0.91% - 1s 0 2 39085.9796 0 2 39442.1314 39085.9796 0.90% - 2s H 61 36 39248.369836 39105.0432 0.37% 10.1 2s H 62 35 39247.736113 39105.0432 0.36% 10.6 2s H 62 35 39247.135892 39105.0432 0.36% 10.6 3s 601 284 39245.5790 9 2 39247.1359 39220.3946 0.07% 3.7 5s 3010 376 39236.2097 26 1 39247.1359 39236.2097 0.03% 3.1 10s Cutting planes: Gomory: 1 Flow cover: 8 Explored 3850 nodes (18366 simplex iterations) in 11.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.924713589172e+04, best bound 3.924322314240e+04, gap 0.0100%