Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:16:42 2012 Optimize a model with 8855 rows, 2970 columns and 29266 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.18s Presolved: 8907 rows, 2968 columns, 31854 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 2.000000e+00, 2297 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 108 54.00000 2.00000 96.3% - 0s H 0 0 44.0000000 2.00000 95.5% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 245 5.00000 2.66667 46.7% - 1s 0 0 2.67974 0 2715 5.00000 2.67974 46.4% - 1s 0 0 2.67974 0 2693 5.00000 2.67974 46.4% - 2s 0 0 2.67974 0 2677 5.00000 2.67974 46.4% - 3s 0 0 2.67974 0 2691 5.00000 2.67974 46.4% - 3s 0 0 2.67974 0 2418 5.00000 2.67974 46.4% - 5s 0 0 2.67974 0 2557 5.00000 2.67974 46.4% - 5s 0 0 2.67974 0 2582 5.00000 2.67974 46.4% - 7s 0 0 2.67974 0 2581 5.00000 2.67974 46.4% - 8s 0 0 2.67974 0 2557 5.00000 2.67974 46.4% - 9s 0 0 2.67974 0 2565 5.00000 2.67974 46.4% - 10s 0 0 2.67974 0 2565 5.00000 2.67974 46.4% - 10s 0 2 3.00000 0 2565 5.00000 3.00000 40.0% - 15s * 21 3 14 4.0000000 4.00000 0.0% 310 16s Cutting planes: Clique: 142 Zero half: 2 Explored 22 nodes (31925 simplex iterations) in 16.16 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%