Gurobi 5.0.1 (linux64) logging started Fri Nov 16 19:51:13 2012 Optimize a model with 11134 rows, 17292 columns and 50040 nonzeros Presolve removed 38 rows and 4718 columns Presolve time: 0.19s Presolved: 11096 rows, 12574 columns, 45154 nonzeros Variable types: 0 continuous, 12574 integer (12574 binary) Found heuristic solution: objective 131.0000000 Root relaxation: objective 2.000000e+00, 7945 iterations, 0.33 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 131.00000 2.00000 98.5% - 0s H 0 0 69.0000000 2.00000 97.1% - 0s H 0 0 4.0000000 2.00000 50.0% - 0s H 0 0 3.0000000 2.00000 33.3% - 0s Cutting planes: Zero half: 1 Explored 0 nodes (24430 simplex iterations) in 1.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 2.000000000000e+00, gap 33.3333%