Gurobi 5.0.1 (linux64) logging started Fri Nov 16 05:31:24 2012 Optimize a model with 9349 rows, 3080 columns and 30853 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.20s Presolved: 9347 rows, 3078 columns, 30513 nonzeros Variable types: 0 continuous, 3078 integer (3078 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 2.000000e+00, 2351 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 0 110 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 0 525 5.00000 2.66667 46.7% - 1s H 0 0 4.0000000 2.66667 33.3% - 1s 0 0 2.66667 0 2901 4.00000 2.66667 33.3% - 1s 0 0 2.66667 0 159 4.00000 2.66667 33.3% - 4s 0 0 2.67089 0 2588 4.00000 2.67089 33.2% - 6s 0 0 2.67089 0 2643 4.00000 2.67089 33.2% - 6s 0 0 2.67089 0 2630 4.00000 2.67089 33.2% - 8s 0 0 2.67089 0 2636 4.00000 2.67089 33.2% - 9s 0 0 2.67089 0 2648 4.00000 2.67089 33.2% - 11s 0 0 2.67089 0 2632 4.00000 2.67089 33.2% - 13s 0 0 2.67089 0 2637 4.00000 2.67089 33.2% - 14s 0 0 2.67089 0 2531 4.00000 2.67089 33.2% - 16s 0 0 2.67089 0 2686 4.00000 2.67089 33.2% - 18s 0 0 2.67089 0 2686 4.00000 2.67089 33.2% - 19s 0 2 2.80000 0 2686 4.00000 2.80000 30.0% - 25s Cutting planes: Clique: 95 Zero half: 13 Explored 13 nodes (73301 simplex iterations) in 29.05 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%