Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:01:53 2012 Optimize a model with 31292 rows, 33672 columns and 126634 nonzeros Presolve removed 40 rows and 6956 columns Presolve time: 0.64s Presolved: 31252 rows, 26716 columns, 119338 nonzeros Variable types: 0 continuous, 26716 integer (26716 binary) Found heuristic solution: objective 183.0000000 Root relaxation: objective 2.000000e+00, 17781 iterations, 1.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 254 183.00000 2.00000 98.9% - 3s H 0 0 182.0000000 2.00000 98.9% - 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: 20 Explored 0 nodes (61395 simplex iterations) in 4.33 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%