Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:16:25 2012 Optimize a model with 9395 rows, 2970 columns and 30886 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.20s Presolved: 9393 rows, 2968 columns, 30538 nonzeros Variable types: 0 continuous, 2968 integer (2968 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 2.000000e+00, 2394 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 51.0000000 2.00000 96.1% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 523 5.00000 2.66667 46.7% - 1s 0 0 2.66667 0 1616 5.00000 2.66667 46.7% - 1s 0 0 2.66667 0 152 5.00000 2.66667 46.7% - 3s 0 0 2.67097 0 2533 5.00000 2.67097 46.6% - 4s 0 0 2.67097 0 2542 5.00000 2.67097 46.6% - 5s 0 0 2.67097 0 2537 5.00000 2.67097 46.6% - 5s 0 0 2.67097 0 2540 5.00000 2.67097 46.6% - 6s 0 0 2.67097 0 2386 5.00000 2.67097 46.6% - 7s 0 0 2.67097 0 2533 5.00000 2.67097 46.6% - 7s 0 0 2.67097 0 2538 5.00000 2.67097 46.6% - 8s 0 0 2.67097 0 2520 5.00000 2.67097 46.6% - 8s 0 0 2.67097 0 2497 5.00000 2.67097 46.6% - 9s 0 0 2.67097 0 2554 5.00000 2.67097 46.6% - 10s 0 0 2.67097 0 2554 5.00000 2.67097 46.6% - 10s 0 2 2.80000 0 2554 5.00000 2.80000 44.0% - 15s * 23 5 16 4.0000000 3.00000 25.0% 252 16s Cutting planes: Clique: 102 Zero half: 2 Explored 29 nodes (29074 simplex iterations) in 16.10 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%