Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:46:23 2012 Optimize a model with 653 rows, 162 columns and 1306 nonzeros Presolve removed 125 rows and 2 columns Presolve time: 0.00s Presolved: 528 rows, 160 columns, 1131 nonzeros Variable types: 0 continuous, 160 integer (160 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.600000e+01, 245 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.00000 0 122 46.00000 66.00000 43.5% - 0s 0 0 65.50000 0 151 46.00000 65.50000 42.4% - 0s H 0 0 52.0000000 65.50000 26.0% - 0s 0 0 64.79167 0 157 52.00000 64.79167 24.6% - 0s 0 0 63.78032 0 156 52.00000 63.78032 22.7% - 0s 0 0 63.18033 0 158 52.00000 63.18033 21.5% - 0s 0 0 62.78802 0 157 52.00000 62.78802 20.7% - 0s 0 0 62.63158 0 156 52.00000 62.63158 20.4% - 0s 0 0 62.49790 0 158 52.00000 62.49790 20.2% - 0s 0 0 62.45910 0 157 52.00000 62.45910 20.1% - 0s 0 0 62.42593 0 157 52.00000 62.42593 20.0% - 0s 0 0 62.42593 0 157 52.00000 62.42593 20.0% - 0s 0 2 62.42593 0 157 52.00000 62.42593 20.0% - 0s H 52 40 53.0000000 62.38005 17.7% 41.8 0s H 81 46 54.0000000 61.81332 14.5% 38.1 0s * 209 71 10 55.0000000 60.73000 10.4% 38.3 0s 613 204 58.26897 8 157 55.00000 59.53333 8.24% 33.3 5s 2270 203 56.29688 25 127 55.00000 57.16667 3.94% 34.7 10s Cutting planes: Gomory: 6 Zero half: 246 Explored 2771 nodes (91453 simplex iterations) in 10.72 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%