Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:33:56 2013 Optimize a model with 660 rows, 36060 columns and 72060 nonzeros Presolve time: 0.05s Presolved: 660 rows, 36060 columns, 72060 nonzeros Variable types: 36000 continuous, 60 integer (60 binary) Root relaxation: objective 5.911537e+04, 1378 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59115.3671 0 8 - 59115.3671 - - 0s H 0 0 62358.000000 59115.3671 5.20% - 0s 0 0 59674.4350 0 4 62358.0000 59674.4350 4.30% - 0s H 0 0 59999.000000 59674.4350 0.54% - 0s 0 0 59711.2602 0 1 59999.0000 59711.2602 0.48% - 0s 0 0 59725.7138 0 2 59999.0000 59725.7138 0.46% - 0s 0 0 59739.1111 0 3 59999.0000 59739.1111 0.43% - 0s 0 0 59739.3413 0 2 59999.0000 59739.3413 0.43% - 0s 0 0 59739.5706 0 4 59999.0000 59739.5706 0.43% - 0s 0 0 59739.5789 0 2 59999.0000 59739.5789 0.43% - 0s 0 0 59739.7988 0 2 59999.0000 59739.7988 0.43% - 0s 0 0 59739.9259 0 1 59999.0000 59739.9259 0.43% - 0s 0 0 59739.9259 0 8 59999.0000 59739.9259 0.43% - 0s 0 0 59739.9259 0 4 59999.0000 59739.9259 0.43% - 0s 0 0 59739.9259 0 1 59999.0000 59739.9259 0.43% - 1s 0 0 59739.9259 0 2 59999.0000 59739.9259 0.43% - 1s 0 0 59739.9259 0 4 59999.0000 59739.9259 0.43% - 1s 0 0 59739.9259 0 2 59999.0000 59739.9259 0.43% - 1s 0 0 59739.9259 0 5 59999.0000 59739.9259 0.43% - 1s 0 0 59739.9259 0 2 59999.0000 59739.9259 0.43% - 1s 0 0 59739.9259 0 5 59999.0000 59739.9259 0.43% - 1s 0 0 59739.9259 0 2 59999.0000 59739.9259 0.43% - 1s 0 0 59739.9259 0 5 59999.0000 59739.9259 0.43% - 1s 0 2 59788.2921 0 5 59999.0000 59788.2921 0.35% - 1s Cutting planes: Implied bound: 107 Flow cover: 22 Explored 6 nodes (3489 simplex iterations) in 1.61 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.999900000000e+04, best bound 5.999900000000e+04, gap 0.0%