Gurobi 5.0.1 (linux64) logging started Fri Nov 16 10:36:53 2012 Optimize a model with 17407 rows, 4692 columns and 56574 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.58s Presolved: 17405 rows, 4690 columns, 56062 nonzeros Variable types: 0 continuous, 4690 integer (4690 binary) Found heuristic solution: objective 68.0000000 Root relaxation: objective 2.000000e+00, 3296 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 136 68.00000 2.00000 97.1% - 1s H 0 0 67.0000000 2.00000 97.0% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 3.00000 0 3300 5.00000 3.00000 40.0% - 19s 0 0 3.00000 0 2621 5.00000 3.00000 40.0% - 22s H 0 0 4.0000000 3.00000 25.0% - 22s 0 0 3.00000 0 2629 4.00000 3.00000 25.0% - 24s 0 0 3.00000 0 1373 4.00000 3.00000 25.0% - 31s 0 0 3.00000 0 2495 4.00000 3.00000 25.0% - 37s 0 0 3.00000 0 108 4.00000 3.00000 25.0% - 45s Cutting planes: Clique: 19 Zero half: 1 Explored 0 nodes (129731 simplex iterations) in 46.61 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%