Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:26:51 2013 Optimize a model with 63279 rows, 62489 columns and 249719 nonzeros Presolve removed 3482 rows and 0 columns Presolve time: 0.41s Presolved: 59797 rows, 62489 columns, 242755 nonzeros Variable types: 62410 continuous, 79 integer (79 binary) Root relaxation: objective 9.072175e+04, 13440 iterations, 3.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 90721.7535 0 4 - 90721.7535 - - 3s H 0 0 93481.000000 90721.7535 2.95% - 3s H 0 0 93244.000000 90721.7535 2.70% - 4s H 0 0 90977.000000 90721.7535 0.28% - 4s 0 0 90724.3681 0 8 90977.0000 90724.3681 0.28% - 4s 0 0 90724.4242 0 8 90977.0000 90724.4242 0.28% - 5s 0 0 90724.5177 0 8 90977.0000 90724.5177 0.28% - 5s 0 0 90724.7211 0 7 90977.0000 90724.7211 0.28% - 7s 0 0 90725.0384 0 7 90977.0000 90725.0384 0.28% - 8s 0 0 90725.0384 0 4 90977.0000 90725.0384 0.28% - 13s 0 0 90725.0384 0 7 90977.0000 90725.0384 0.28% - 13s 0 0 90725.0384 0 7 90977.0000 90725.0384 0.28% - 14s 0 0 90725.3325 0 5 90977.0000 90725.3325 0.28% - 15s 0 2 90726.0721 0 5 90977.0000 90726.0721 0.28% - 16s * 10 1 3 90869.000000 90869.0000 0.0% 185 17s Cutting planes: Gomory: 1 Flow cover: 9 Explored 11 nodes (21159 simplex iterations) in 17.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.086900000000e+04, best bound 9.086900000000e+04, gap 0.0%