Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:48:27 2012 Optimize a model with 5335 rows, 2162 columns and 17938 nonzeros Presolve removed 1106 rows and 2 columns Presolve time: 0.12s Presolved: 4275 rows, 2160 columns, 17202 nonzeros Variable types: 0 continuous, 2160 integer (2160 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 3.000000e+00, 3615 iterations, 0.33 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 115 46.00000 3.00000 93.5% - 1s H 0 0 26.0000000 3.00000 88.5% - 1s H 0 0 18.0000000 3.00000 83.3% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s 0 0 3.00000 0 100 5.00000 3.00000 40.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 93 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 111 4.00000 3.00000 25.0% - 2s 0 0 3.00000 0 92 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 101 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 96 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 98 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 97 4.00000 3.00000 25.0% - 9s 0 2 3.00000 0 97 4.00000 3.00000 25.0% - 10s 8 8 3.00000 1 97 4.00000 3.00000 25.0% 2680 15s 15 13 3.00000 1 92 4.00000 3.00000 25.0% 1430 20s Cutting planes: Gomory: 15 Zero half: 38 Explored 27 nodes (112520 simplex iterations) in 24.53 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%