Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:23:23 2012 Optimize a model with 7127 rows, 4422 columns and 25474 nonzeros Presolve removed 596 rows and 2 columns Presolve time: 0.23s Presolved: 6597 rows, 4420 columns, 28180 nonzeros Variable types: 0 continuous, 4420 integer (4420 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 3.000000e+00, 4250 iterations, 0.38 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 273 66.00000 3.00000 95.5% - 2s H 0 0 43.0000000 3.00000 93.0% - 2s H 0 0 4.0000000 3.00000 25.0% - 2s 0 0 3.00000 0 363 4.00000 3.00000 25.0% - 2s H 0 0 3.0000000 3.00000 0.0% - 2s Cutting planes: Zero half: 7 Explored 0 nodes (19780 simplex iterations) in 2.79 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%