Gurobi 5.0.1 (linux64) logging started Fri Nov 16 21:55:44 2012 Optimize a model with 30226 rows, 32942 columns and 122716 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.70s Presolved: 30405 rows, 32940 columns, 155143 nonzeros Variable types: 0 continuous, 32940 integer (32940 binary) Found heuristic solution: objective 181.0000000 Root relaxation: objective 2.000000e+00, 19744 iterations, 1.28 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 274 181.00000 2.00000 98.9% - 4s H 0 0 179.0000000 2.00000 98.9% - 4s H 0 0 4.0000000 2.00000 50.0% - 4s 0 0 2.14286 0 10648 4.00000 2.14286 46.4% - 10s H 0 0 3.0000000 2.14286 28.6% - 18s Cutting planes: Gomory: 1 Zero half: 6 Explored 0 nodes (75741 simplex iterations) in 18.56 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%