Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:53:18 2012 Optimize a model with 17549 rows, 22650 columns and 74548 nonzeros Presolve removed 30 rows and 4202 columns Presolve time: 0.35s Presolved: 17519 rows, 18448 columns, 70114 nonzeros Variable types: 0 continuous, 18448 integer (18448 binary) Found heuristic solution: objective 150.0000000 Root relaxation: objective 2.000000e+00, 12785 iterations, 0.57 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 168 150.00000 2.00000 98.7% - 2s H 0 0 97.0000000 2.00000 97.9% - 2s H 0 0 4.0000000 2.00000 50.0% - 2s H 0 0 3.0000000 2.00000 33.3% - 2s 0 0 infeasible 0 3.00000 2.00000 33.3% - 2s Cutting planes: Gomory: 1 Zero half: 2 Explored 0 nodes (41980 simplex iterations) in 2.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%