Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:48:44 2012 Optimize a model with 30787 rows, 32220 columns and 123687 nonzeros Presolve removed 22 rows and 3582 columns Presolve time: 0.68s Presolved: 30765 rows, 28638 columns, 119763 nonzeros Variable types: 0 continuous, 28638 integer (28638 binary) Found heuristic solution: objective 179.0000000 Root relaxation: objective 2.000000e+00, 20453 iterations, 1.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 294 179.00000 2.00000 98.9% - 4s H 0 0 107.0000000 2.00000 98.1% - 4s H 0 0 4.0000000 2.00000 50.0% - 4s H 0 0 3.0000000 2.00000 33.3% - 4s 0 0 infeasible 0 3.00000 2.00000 33.3% - 4s Cutting planes: Gomory: 1 Zero half: 12 Explored 0 nodes (66037 simplex iterations) in 4.54 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%