Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:18:41 2012 Optimize a model with 896 rows, 188 columns and 1792 nonzeros Presolve removed 186 rows and 0 columns Presolve time: 0.01s Presolved: 710 rows, 188 columns, 1542 nonzeros Variable types: 0 continuous, 188 integer (188 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 7.512500e+01, 375 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 75.12500 0 166 51.00000 75.12500 47.3% - 0s H 0 0 53.0000000 75.12500 41.7% - 0s 0 0 73.70833 0 184 53.00000 73.70833 39.1% - 0s 0 0 72.28854 0 187 53.00000 72.28854 36.4% - 0s 0 0 71.39029 0 186 53.00000 71.39029 34.7% - 0s 0 0 71.16637 0 188 53.00000 71.16637 34.3% - 0s 0 0 71.02271 0 188 53.00000 71.02271 34.0% - 0s 0 0 70.74326 0 187 53.00000 70.74326 33.5% - 0s 0 0 70.55536 0 187 53.00000 70.55536 33.1% - 0s 0 0 70.45181 0 187 53.00000 70.45181 32.9% - 0s H 0 0 54.0000000 70.45181 30.5% - 0s 0 0 70.32073 0 187 54.00000 70.32073 30.2% - 0s 0 0 70.22947 0 187 54.00000 70.22947 30.1% - 0s 0 0 70.02763 0 188 54.00000 70.02763 29.7% - 0s 0 0 69.83855 0 188 54.00000 69.83855 29.3% - 0s 0 0 69.73615 0 188 54.00000 69.73615 29.1% - 0s 0 0 69.69684 0 188 54.00000 69.69684 29.1% - 0s 0 0 69.69684 0 188 54.00000 69.69684 29.1% - 0s 0 2 69.69083 0 188 54.00000 69.69083 29.1% - 0s H 24 24 57.0000000 69.45645 21.9% 76.8 0s H 28 28 58.0000000 69.45645 19.8% 67.0 0s H 249 128 59.0000000 68.34031 15.8% 55.9 0s 608 318 64.32112 9 186 59.00000 67.14858 13.8% 50.4 5s 616 323 63.87500 6 187 59.00000 67.14858 13.8% 49.7 10s 624 328 63.61538 18 188 59.00000 67.14858 13.8% 49.1 15s 1516 568 64.69691 23 165 59.00000 65.97925 11.8% 56.3 20s H 2426 817 60.0000000 65.11967 8.53% 51.4 22s 3153 1091 63.83333 22 139 60.00000 64.65033 7.75% 49.5 25s 4941 1451 cutoff 33 60.00000 63.71910 6.20% 46.5 30s 7190 1580 cutoff 28 60.00000 63.01307 5.02% 43.8 35s 9617 1491 61.67647 27 140 60.00000 62.49355 4.16% 41.0 40s 12713 548 61.00000 31 122 60.00000 61.60000 2.67% 38.3 45s Cutting planes: Gomory: 2 Clique: 1 Zero half: 237 Explored 13501 nodes (503037 simplex iterations) in 45.75 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%