Gurobi 5.0.1 (linux64) logging started Sat Nov 17 05:35:09 2012 Optimize a model with 66180 rows, 52670 columns and 250066 nonzeros Presolve removed 19 rows and 3895 columns Presolve time: 4.82s Presolved: 66161 rows, 48775 columns, 245595 nonzeros Variable types: 0 continuous, 48775 integer (48775 binary) Found heuristic solution: objective 229.0000000 Root relaxation: objective 2.000000e+00, 34811 iterations, 3.39 seconds Total elapsed time = 13.24s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 416 229.00000 2.00000 99.1% - 14s H 0 0 226.0000000 2.00000 99.1% - 14s H 0 0 4.0000000 2.00000 50.0% - 14s 0 0 2.66667 0 1262 4.00000 2.66667 33.3% - 38s H 0 0 3.0000000 2.66667 11.1% - 39s Cutting planes: Clique: 2 Zero half: 1 Explored 0 nodes (151642 simplex iterations) in 39.41 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%