Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:21:01 2012 Optimize a model with 5999 rows, 2550 columns and 20298 nonzeros Presolve removed 1402 rows and 2 columns Presolve time: 0.14s Presolved: 4647 rows, 2548 columns, 19264 nonzeros Variable types: 0 continuous, 2548 integer (2548 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 3.000000e+00, 4744 iterations, 0.57 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 454 50.00000 3.00000 94.0% - 1s H 0 0 46.0000000 3.00000 93.5% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 infeasible 0 4.00000 3.00001 25.0% - 2s Cutting planes: Gomory: 2 Zero half: 63 Explored 0 nodes (12203 simplex iterations) in 2.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%