Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:20:12 2013 Optimize a model with 30855 rows, 30305 columns and 121055 nonzeros Presolve removed 2470 rows and 0 columns Presolve time: 0.17s Presolved: 28385 rows, 30305 columns, 116115 nonzeros Variable types: 30250 continuous, 55 integer (55 binary) Root relaxation: objective 6.583865e+04, 6609 iterations, 0.78 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65838.6533 0 4 - 65838.6533 - - 1s H 0 0 67062.000000 65838.6533 1.82% - 1s 0 0 65849.4642 0 6 67062.0000 65849.4642 1.81% - 1s 0 0 65849.8762 0 6 67062.0000 65849.8762 1.81% - 1s 0 0 65849.9320 0 6 67062.0000 65849.9320 1.81% - 1s 0 0 65849.9320 0 6 67062.0000 65849.9320 1.81% - 2s 0 2 65850.0771 0 6 67062.0000 65850.0771 1.81% - 3s H 5 4 66038.765957 65949.3350 0.14% 182 3s * 7 2 6 65954.000000 65949.3350 0.01% 138 3s Cutting planes: Gomory: 3 Flow cover: 6 Explored 8 nodes (7640 simplex iterations) in 3.53 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.595400000000e+04, best bound 6.594933500326e+04, gap 0.0071%