Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:22 2013 Optimize a model with 473 rows, 18533 columns and 37023 nonzeros Presolve time: 0.02s Presolved: 473 rows, 18533 columns, 37023 nonzeros Variable types: 18490 continuous, 43 integer (43 binary) Root relaxation: objective 4.944497e+04, 837 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 49444.9668 0 4 - 49444.9668 - - 0s H 0 0 50631.000000 49444.9668 2.34% - 0s H 0 0 49983.000000 49444.9668 1.08% - 0s 0 0 49638.1245 0 5 49983.0000 49638.1245 0.69% - 0s 0 0 49668.6744 0 4 49983.0000 49668.6744 0.63% - 0s 0 0 49674.9311 0 3 49983.0000 49674.9311 0.62% - 0s 0 0 49676.6548 0 3 49983.0000 49676.6548 0.61% - 0s 0 0 49678.5282 0 2 49983.0000 49678.5282 0.61% - 0s H 0 0 49929.000000 49678.5282 0.50% - 0s 0 0 49678.5282 0 4 49929.0000 49678.5282 0.50% - 0s 0 0 49678.5282 0 5 49929.0000 49678.5282 0.50% - 0s 0 0 49678.5282 0 4 49929.0000 49678.5282 0.50% - 0s 0 0 49678.5282 0 3 49929.0000 49678.5282 0.50% - 0s 0 0 49678.5282 0 2 49929.0000 49678.5282 0.50% - 0s 0 0 49678.5282 0 2 49929.0000 49678.5282 0.50% - 0s 0 2 49687.3486 0 2 49929.0000 49687.3486 0.48% - 0s H 6 3 49890.000000 49835.6963 0.11% 25.0 0s H 7 4 49863.000000 49835.6963 0.05% 22.4 0s * 8 4 7 49854.000000 49835.6963 0.04% 20.8 0s Cutting planes: Implied bound: 34 Flow cover: 4 Explored 12 nodes (2266 simplex iterations) in 0.64 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.985400000000e+04, best bound 4.984981348637e+04, gap 0.0084%