Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:32:40 2012 Optimize a model with 15749 rows, 4970 columns and 51868 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.54s Presolved: 15747 rows, 4968 columns, 51418 nonzeros Variable types: 0 continuous, 4968 integer (4968 binary) Found heuristic solution: objective 70.0000000 Root relaxation: objective 2.000000e+00, 3403 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 140 70.00000 2.00000 97.1% - 0s H 0 0 68.0000000 2.00000 97.1% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 263 5.00000 2.66667 46.7% - 9s 0 0 2.67327 0 4419 5.00000 2.67327 46.5% - 9s 0 0 2.67327 0 4411 5.00000 2.67327 46.5% - 11s 0 0 2.67327 0 4405 5.00000 2.67327 46.5% - 12s 0 0 2.67327 0 4400 5.00000 2.67327 46.5% - 13s 0 0 2.67327 0 4406 5.00000 2.67327 46.5% - 13s 0 0 2.67327 0 4124 5.00000 2.67327 46.5% - 16s 0 2 3.00000 0 4124 5.00000 3.00000 40.0% - 36s * 16 5 12 4.0000000 3.00000 25.0% 498 37s Cutting planes: Clique: 142 Zero half: 10 Explored 26 nodes (52671 simplex iterations) in 38.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%