Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:21:29 2012 Optimize a model with 10552 rows, 3782 columns and 35134 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.27s Presolved: 10550 rows, 3780 columns, 34788 nonzeros Variable types: 0 continuous, 3780 integer (3780 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 2.000000e+00, 2835 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 122 61.00000 2.00000 96.7% - 0s H 0 0 60.0000000 2.00000 96.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s H 0 0 4.0000000 2.00000 50.0% - 0s 0 0 2.66667 0 815 4.00000 2.66667 33.3% - 1s 0 0 2.66667 0 2988 4.00000 2.66667 33.3% - 1s 0 0 2.66667 0 143 4.00000 2.66667 33.3% - 5s 0 0 2.67045 0 3218 4.00000 2.67045 33.2% - 7s 0 0 2.67045 0 3179 4.00000 2.67045 33.2% - 7s 0 0 2.67045 0 3156 4.00000 2.67045 33.2% - 8s 0 0 2.67045 0 3156 4.00000 2.67045 33.2% - 9s 0 0 2.67045 0 3084 4.00000 2.67045 33.2% - 11s 0 0 2.67045 0 3050 4.00000 2.67045 33.2% - 11s 0 0 2.67045 0 3029 4.00000 2.67045 33.2% - 13s 0 0 2.67045 0 3038 4.00000 2.67045 33.2% - 14s 0 0 2.67045 0 3034 4.00000 2.67045 33.2% - 15s 0 0 2.67045 0 3033 4.00000 2.67045 33.2% - 16s 0 0 2.67045 0 3025 4.00000 2.67045 33.2% - 18s 0 0 2.67045 0 3025 4.00000 2.67045 33.2% - 19s 0 0 2.67045 0 3025 4.00000 2.67045 33.2% - 20s 0 0 2.67045 0 3025 4.00000 2.67045 33.2% - 22s 0 2 2.80000 0 3025 4.00000 2.80000 30.0% - 27s Cutting planes: Clique: 70 Zero half: 8 Explored 11 nodes (71284 simplex iterations) in 29.84 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%