Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:59:06 2012 Optimize a model with 19994 rows, 24180 columns and 83388 nonzeros Presolve removed 31 rows and 4497 columns Presolve time: 0.41s Presolved: 19963 rows, 19683 columns, 78635 nonzeros Variable types: 0 continuous, 19683 integer (19683 binary) Found heuristic solution: objective 155.0000000 Root relaxation: objective 2.000000e+00, 12835 iterations, 0.55 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 200 155.00000 2.00000 98.7% - 2s H 0 0 145.0000000 2.00000 98.6% - 2s H 0 0 4.0000000 2.00000 50.0% - 2s 0 0 2.27273 0 357 4.00000 2.27273 43.2% - 3s H 0 0 3.0000000 2.27273 24.2% - 3s Cutting planes: Gomory: 2 Zero half: 1 Explored 0 nodes (47112 simplex iterations) in 3.58 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%