Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:52:24 2012 Optimize a model with 17759 rows, 22052 columns and 74590 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.32s Presolved: 17905 rows, 22050 columns, 96254 nonzeros Variable types: 0 continuous, 22050 integer (22050 binary) Found heuristic solution: objective 148.0000000 Root relaxation: objective 2.000000e+00, 13029 iterations, 0.69 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 202 148.00000 2.00000 98.6% - 2s H 0 0 114.0000000 2.00000 98.2% - 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: 5 Explored 0 nodes (43137 simplex iterations) in 2.40 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%