Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:53:51 2012 Optimize a model with 15099 rows, 22952 columns and 67495 nonzeros Presolve removed 42 rows and 6042 columns Presolve time: 0.28s Presolved: 15057 rows, 16910 columns, 61255 nonzeros Variable types: 0 continuous, 16910 integer (16910 binary) Found heuristic solution: objective 151.0000000 Root relaxation: objective 2.000000e+00, 10662 iterations, 0.41 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 116 151.00000 2.00000 98.7% - 1s H 0 0 48.0000000 2.00000 95.8% - 1s H 0 0 4.0000000 2.00000 50.0% - 1s H 0 0 3.0000000 2.00000 33.3% - 1s Cutting planes: Zero half: 1 Explored 0 nodes (37138 simplex iterations) in 1.54 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%