Gurobi 5.0.1 (linux64) logging started Fri Nov 16 20:46:55 2012 Optimize a model with 17060 rows, 20022 columns and 70498 nonzeros Presolve removed 28 rows and 3668 columns Presolve time: 0.32s Presolved: 17032 rows, 16354 columns, 66590 nonzeros Variable types: 0 continuous, 16354 integer (16354 binary) Found heuristic solution: objective 141.0000000 Root relaxation: objective 2.000000e+00, 12040 iterations, 0.59 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 214 141.00000 2.00000 98.6% - 1s H 0 0 139.0000000 2.00000 98.6% - 1s H 0 0 4.0000000 2.00000 50.0% - 1s H 0 0 3.0000000 2.00000 33.3% - 2s Cutting planes: Zero half: 1 Explored 0 nodes (39334 simplex iterations) in 2.08 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%