Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:49:36 2012 Optimize a model with 5105 rows, 2162 columns and 17248 nonzeros Presolve removed 1152 rows and 2 columns Presolve time: 0.13s Presolved: 3999 rows, 2160 columns, 16432 nonzeros Variable types: 0 continuous, 2160 integer (2160 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 3.000000e+00, 3580 iterations, 0.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 85 46.00000 3.00000 93.5% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 135 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 91 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 101 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 113 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 110 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 69 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 60 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 57 4.00000 3.00000 25.0% - 13s 0 0 3.00000 0 100 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 16s 0 0 3.00000 0 88 4.00000 3.00000 25.0% - 18s 0 0 3.00000 0 117 4.00000 3.00000 25.0% - 20s 0 0 3.00000 0 117 4.00000 3.00000 25.0% - 20s 0 2 3.00000 0 117 4.00000 3.00000 25.0% - 21s 4 4 3.00000 1 180 4.00000 3.00000 25.0% 668 25s 8 7 3.00000 1 104 4.00000 3.00000 25.0% 334 32s 11 11 3.00000 10 76 4.00000 3.00000 25.0% 5239 36s 14 13 3.00000 11 70 4.00000 3.00000 25.0% 4248 40s Cutting planes: Gomory: 12 Zero half: 21 Explored 37 nodes (177901 simplex iterations) in 42.12 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%