Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:36:45 2012 Optimize a model with 9349 rows, 3080 columns and 30853 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.19s Presolved: 9402 rows, 3078 columns, 33538 nonzeros Variable types: 0 continuous, 3078 integer (3078 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 2.000000e+00, 2427 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 110 55.00000 2.00000 96.4% - 0s H 0 0 54.0000000 2.00000 96.3% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 145 5.00000 2.66667 46.7% - 1s 0 0 2.67089 0 2791 5.00000 2.67089 46.6% - 1s 0 0 2.67089 0 2789 5.00000 2.67089 46.6% - 2s 0 0 2.67089 0 2779 5.00000 2.67089 46.6% - 3s 0 0 2.67089 0 2771 5.00000 2.67089 46.6% - 3s 0 0 2.67089 0 2786 5.00000 2.67089 46.6% - 4s 0 0 2.67089 0 2560 5.00000 2.67089 46.6% - 5s 0 0 2.67089 0 2588 5.00000 2.67089 46.6% - 6s 0 0 2.67089 0 2530 5.00000 2.67089 46.6% - 6s 0 0 2.67089 0 2585 5.00000 2.67089 46.6% - 7s 0 0 2.67089 0 2583 5.00000 2.67089 46.6% - 8s 0 0 2.67089 0 2595 5.00000 2.67089 46.6% - 9s 0 0 2.67089 0 2647 5.00000 2.67089 46.6% - 10s 0 0 2.67089 0 2647 5.00000 2.67089 46.6% - 10s 0 2 2.80000 0 2647 5.00000 2.80000 44.0% - 15s * 27 4 21 4.0000000 3.00000 25.0% 283 16s Cutting planes: Clique: 99 Zero half: 16 Explored 32 nodes (44182 simplex iterations) in 17.44 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%