Gurobi 5.0.1 (linux64) logging started Mon Nov 19 07:03:12 2012 Optimize a model with 4002 rows, 126 columns and 8004 nonzeros Presolve removed 2879 rows and 0 columns Presolve time: 0.14s Presolved: 1123 rows, 126 columns, 7908 nonzeros Variable types: 0 continuous, 126 integer (126 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.637987e+01, 641 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 16.37987 0 124 7.00000 16.37987 134% - 0s H 0 0 8.0000000 16.37987 105% - 0s 0 0 16.08582 0 124 8.00000 16.08582 101% - 0s 0 0 16.00159 0 125 8.00000 16.00159 100% - 0s 0 0 15.96869 0 125 8.00000 15.96869 100% - 0s 0 0 15.87188 0 125 8.00000 15.87188 98.4% - 0s H 0 0 9.0000000 15.87188 76.4% - 0s 0 0 15.77395 0 125 9.00000 15.77395 75.3% - 1s 0 0 15.73182 0 125 9.00000 15.73182 74.8% - 1s 0 0 15.70076 0 126 9.00000 15.70076 74.5% - 1s 0 0 15.68634 0 125 9.00000 15.68634 74.3% - 1s 0 0 15.67400 0 125 9.00000 15.67400 74.2% - 1s 0 0 15.63808 0 125 9.00000 15.63808 73.8% - 1s 0 0 15.62631 0 126 9.00000 15.62631 73.6% - 2s 0 0 15.62049 0 126 9.00000 15.62049 73.6% - 2s 0 0 15.61907 0 126 9.00000 15.61907 73.5% - 2s 0 0 15.61800 0 126 9.00000 15.61800 73.5% - 2s 0 0 15.61179 0 126 9.00000 15.61179 73.5% - 2s 0 0 15.60270 0 126 9.00000 15.60270 73.4% - 3s 0 0 15.60220 0 126 9.00000 15.60220 73.4% - 3s 0 0 15.60211 0 126 9.00000 15.60211 73.4% - 3s 0 0 15.60210 0 126 9.00000 15.60210 73.4% - 3s 0 2 15.60174 0 126 9.00000 15.60174 73.4% - 3s 227 117 10.96360 14 56 9.00000 14.44577 60.5% 68.7 5s Cutting planes: Clique: 130 Zero half: 1 Explored 731 nodes (44436 simplex iterations) in 7.57 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%