Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:54:33 2012 Optimize a model with 4652 rows, 2256 columns and 15978 nonzeros Presolve removed 1224 rows and 2 columns Presolve time: 0.11s Presolved: 3428 rows, 2254 columns, 12871 nonzeros Variable types: 0 continuous, 2254 integer (2254 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 3.000000e+00, 3377 iterations, 0.27 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 105 47.00000 3.00000 93.6% - 1s H 0 0 41.0000000 3.00000 92.7% - 1s H 0 0 6.0000000 3.00000 50.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 119 4.00000 3.00000 25.0% - 1s H 0 0 3.0000000 3.00000 0.0% - 1s Cutting planes: Gomory: 1 Zero half: 4 Explored 0 nodes (9490 simplex iterations) in 1.34 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%