Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:50:21 2012 Optimize a model with 5151 rows, 2162 columns and 17386 nonzeros Presolve removed 1014 rows and 2 columns Presolve time: 0.11s Presolved: 4183 rows, 2160 columns, 17022 nonzeros Variable types: 0 continuous, 2160 integer (2160 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 3.000000e+00, 3892 iterations, 0.44 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 70 46.00000 3.00000 93.5% - 1s H 0 0 13.0000000 3.00000 76.9% - 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 0 473 4.00000 3.00000 25.0% - 1s 0 0 3.00000 0 64 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 60 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 54 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 94 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 54 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 123 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 50 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 121 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 97 4.00000 3.00000 25.0% - 12s 0 2 3.00000 0 97 4.00000 3.00000 25.0% - 13s 4 4 3.00000 1 894 4.00000 3.00000 25.0% 594 16s Cutting planes: Gomory: 17 Zero half: 44 Explored 4 nodes (87491 simplex iterations) in 16.33 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%