Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:46:13 2012 Optimize a model with 27233 rows, 31862 columns and 112672 nonzeros Presolve removed 34 rows and 5698 columns Presolve time: 0.60s Presolved: 27199 rows, 26164 columns, 106670 nonzeros Variable types: 0 continuous, 26164 integer (26164 binary) Found heuristic solution: objective 178.0000000 Root relaxation: objective 2.000000e+00, 19133 iterations, 1.18 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 264 178.00000 2.00000 98.9% - 3s H 0 0 165.0000000 2.00000 98.8% - 3s 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 Clique: 2 Zero half: 8 Explored 0 nodes (63352 simplex iterations) in 4.17 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%