Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:27:39 2012 Optimize a model with 10552 rows, 3782 columns and 35134 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.27s Presolved: 10611 rows, 3780 columns, 38509 nonzeros Variable types: 0 continuous, 3780 integer (3780 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 2.000000e+00, 2803 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 122 61.00000 2.00000 96.7% - 0s H 0 0 52.0000000 2.00000 96.2% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s H 0 0 4.0000000 2.00000 50.0% - 0s 0 0 2.66667 0 3264 4.00000 2.66667 33.3% - 2s 0 0 2.67045 0 3206 4.00000 2.67045 33.2% - 3s 0 0 2.67045 0 3206 4.00000 2.67045 33.2% - 4s 0 0 2.67045 0 2902 4.00000 2.67045 33.2% - 10s 0 0 2.67045 0 2761 4.00000 2.67045 33.2% - 14s 0 0 2.67045 0 2727 4.00000 2.67045 33.2% - 20s 0 0 2.67045 0 2811 4.00000 2.67045 33.2% - 25s 0 0 2.67045 0 2967 4.00000 2.67045 33.2% - 29s 0 0 2.67045 0 2957 4.00000 2.67045 33.2% - 34s 0 0 2.67045 0 2942 4.00000 2.67045 33.2% - 40s 0 0 2.67045 0 2976 4.00000 2.67045 33.2% - 44s 0 0 2.67045 0 3090 4.00000 2.67045 33.2% - 48s 0 0 2.67045 0 3090 4.00000 2.67045 33.2% - 52s 0 2 2.80000 0 3090 4.00000 2.80000 30.0% - 70s Cutting planes: Clique: 62 Zero half: 10 Explored 23 nodes (183750 simplex iterations) in 73.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%