Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:52:06 2012 Optimize a model with 17759 rows, 22052 columns and 74590 nonzeros Presolve removed 27 rows and 3702 columns Presolve time: 0.35s Presolved: 17732 rows, 18350 columns, 70650 nonzeros Variable types: 0 continuous, 18350 integer (18350 binary) Found heuristic solution: objective 148.0000000 Root relaxation: objective 2.000000e+00, 12616 iterations, 0.60 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 0 124.0000000 2.00000 98.4% - 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: 9 Explored 0 nodes (40471 simplex iterations) in 2.22 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%