Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:02:57 2012 Optimize a model with 877 rows, 186 columns and 1754 nonzeros Presolve removed 227 rows and 5 columns Presolve time: 0.01s Presolved: 650 rows, 181 columns, 1432 nonzeros Variable types: 0 continuous, 181 integer (181 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 7.316667e+01, 412 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 73.16667 0 159 51.00000 73.16667 43.5% - 0s 0 0 72.01262 0 178 51.00000 72.01262 41.2% - 0s H 0 0 52.0000000 72.01262 38.5% - 0s 0 0 71.62333 0 178 52.00000 71.62333 37.7% - 0s H 0 0 53.0000000 71.62333 35.1% - 0s 0 0 71.33807 0 178 53.00000 71.33807 34.6% - 0s H 0 0 54.0000000 71.33807 32.1% - 0s 0 0 70.92628 0 178 54.00000 70.92628 31.3% - 0s 0 0 70.62231 0 177 54.00000 70.62231 30.8% - 0s 0 0 70.23335 0 178 54.00000 70.23335 30.1% - 0s 0 0 70.02617 0 180 54.00000 70.02617 29.7% - 0s 0 0 69.92869 0 181 54.00000 69.92869 29.5% - 0s 0 0 69.78069 0 181 54.00000 69.78069 29.2% - 0s H 0 0 56.0000000 69.78069 24.6% - 0s 0 0 69.61807 0 181 56.00000 69.61807 24.3% - 0s 0 0 69.56996 0 179 56.00000 69.56996 24.2% - 0s 0 0 69.53217 0 180 56.00000 69.53217 24.2% - 0s 0 0 69.46772 0 180 56.00000 69.46772 24.0% - 0s 0 0 69.41802 0 179 56.00000 69.41802 24.0% - 0s 0 0 69.31540 0 180 56.00000 69.31540 23.8% - 0s 0 0 69.23937 0 179 56.00000 69.23937 23.6% - 0s 0 0 69.16652 0 180 56.00000 69.16652 23.5% - 0s 0 0 69.09323 0 180 56.00000 69.09323 23.4% - 0s 0 0 69.01902 0 180 56.00000 69.01902 23.2% - 0s 0 0 68.94493 0 181 56.00000 68.94493 23.1% - 0s 0 0 68.89601 0 181 56.00000 68.89601 23.0% - 0s 0 0 68.87718 0 181 56.00000 68.87718 23.0% - 0s 0 0 68.87718 0 179 56.00000 68.87718 23.0% - 0s 0 2 68.86939 0 179 56.00000 68.86939 23.0% - 0s H 47 27 57.0000000 68.54410 20.3% 49.6 0s H 50 25 58.0000000 68.54410 18.2% 47.3 0s H 133 61 59.0000000 67.99861 15.3% 52.1 0s 609 262 64.88660 9 180 59.00000 66.45937 12.6% 48.4 5s 1925 792 64.00000 23 141 59.00000 65.81818 11.6% 47.6 10s 4660 1934 60.82143 27 131 59.00000 64.11310 8.67% 38.3 15s 8379 2886 60.00000 47 111 59.00000 63.33929 7.35% 33.7 20s 12593 3514 60.00000 33 92 59.00000 62.65385 6.19% 31.2 25s *14071 2565 35 60.0000000 62.47244 4.12% 30.6 26s 17505 893 cutoff 35 60.00000 61.33333 2.22% 29.1 30s Cutting planes: Gomory: 5 Zero half: 73 Explored 18458 nodes (521116 simplex iterations) in 30.40 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%