Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:48:02 2012 Optimize a model with 10727 rows, 5256 columns and 37078 nonzeros Presolve removed 1874 rows and 2 columns Presolve time: 0.44s Presolved: 8925 rows, 5254 columns, 37408 nonzeros Variable types: 0 continuous, 5254 integer (5254 binary) Found heuristic solution: objective 72.0000000 Root relaxation: objective 3.000000e+00, 7739 iterations, 1.30 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 248 72.00000 3.00000 95.8% - 4s H 0 0 66.0000000 3.00000 95.5% - 4s H 0 0 8.0000000 3.00000 62.5% - 4s 0 0 3.00000 0 1424 8.00000 3.00000 62.5% - 5s H 0 0 3.0000000 3.00000 0.0% - 6s Cutting planes: Zero half: 8 Explored 0 nodes (22747 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%