Gurobi 5.0.1 (linux64) logging started Fri Nov 16 22:41:11 2012 Optimize a model with 40143 rows, 37442 columns and 156907 nonzeros Presolve removed 27 rows and 4827 columns Presolve time: 0.88s Presolved: 40116 rows, 32615 columns, 151666 nonzeros Variable types: 0 continuous, 32615 integer (32615 binary) Found heuristic solution: objective 193.0000000 Root relaxation: objective 2.000000e+00, 24595 iterations, 1.63 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 332 193.00000 2.00000 99.0% - 5s H 0 0 115.0000000 2.00000 98.3% - 5s H 0 0 4.0000000 2.00000 50.0% - 5s H 0 0 3.0000000 2.00000 33.3% - 5s Cutting planes: Gomory: 1 Explored 0 nodes (80128 simplex iterations) in 5.80 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%