Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:50:51 2012 Optimize a model with 41729 rows, 38220 columns and 162433 nonzeros Presolve removed 23 rows and 4097 columns Presolve time: 1.04s Presolved: 41706 rows, 34123 columns, 157910 nonzeros Variable types: 0 continuous, 34123 integer (34123 binary) Found heuristic solution: objective 195.0000000 Root relaxation: objective 2.000000e+00, 24663 iterations, 1.95 seconds Total elapsed time = 5.13s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 326 195.00000 2.00000 99.0% - 5s H 0 0 194.0000000 2.00000 99.0% - 5s H 0 0 4.0000000 2.00000 50.0% - 6s H 0 0 3.0000000 2.00000 33.3% - 6s 0 0 infeasible 0 3.00000 2.00000 33.3% - 6s Cutting planes: Gomory: 3 Zero half: 30 Explored 0 nodes (76800 simplex iterations) in 6.22 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%