Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:50:34 2012 Optimize a model with 2837 rows, 106 columns and 5674 nonzeros Presolve removed 2055 rows and 0 columns Presolve time: 0.08s Presolved: 782 rows, 106 columns, 5425 nonzeros Variable types: 0 continuous, 106 integer (106 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.438166e+01, 397 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.38166 0 102 6.00000 14.38166 140% - 0s H 0 0 7.0000000 14.38166 105% - 0s 0 0 13.94213 0 101 7.00000 13.94213 99.2% - 0s 0 0 13.79960 0 103 7.00000 13.79960 97.1% - 0s H 0 0 8.0000000 13.79960 72.5% - 0s 0 0 13.72863 0 105 8.00000 13.72863 71.6% - 0s 0 0 13.71940 0 105 8.00000 13.71940 71.5% - 0s 0 0 13.70825 0 106 8.00000 13.70825 71.4% - 0s 0 0 13.69880 0 105 8.00000 13.69880 71.2% - 0s 0 0 13.68666 0 105 8.00000 13.68666 71.1% - 0s 0 0 13.68270 0 105 8.00000 13.68270 71.0% - 1s 0 0 13.68024 0 105 8.00000 13.68024 71.0% - 1s 0 0 13.67865 0 105 8.00000 13.67865 71.0% - 1s 0 0 13.67707 0 105 8.00000 13.67707 71.0% - 1s 0 0 13.66454 0 105 8.00000 13.66454 70.8% - 1s 0 0 13.65925 0 106 8.00000 13.65925 70.7% - 1s 0 0 13.65699 0 106 8.00000 13.65699 70.7% - 1s 0 0 13.65438 0 106 8.00000 13.65438 70.7% - 1s 0 0 13.65247 0 106 8.00000 13.65247 70.7% - 1s 0 0 13.65037 0 106 8.00000 13.65037 70.6% - 2s 0 2 13.64933 0 106 8.00000 13.64933 70.6% - 2s * 250 64 7 9.0000000 11.79222 31.0% 51.6 2s Cutting planes: Clique: 106 Explored 322 nodes (17179 simplex iterations) in 3.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%