Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:42:47 2012 Optimize a model with 871 rows, 183 columns and 1742 nonzeros Presolve removed 203 rows and 0 columns Presolve time: 0.00s Presolved: 668 rows, 183 columns, 1481 nonzeros Variable types: 0 continuous, 183 integer (183 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 7.200000e+01, 365 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 72.00000 0 144 54.00000 72.00000 33.3% - 0s 0 0 71.35100 0 181 54.00000 71.35100 32.1% - 0s 0 0 70.44258 0 182 54.00000 70.44258 30.4% - 0s 0 0 69.79515 0 182 54.00000 69.79515 29.3% - 0s 0 0 69.36973 0 180 54.00000 69.36973 28.5% - 0s H 0 0 56.0000000 69.36973 23.9% - 0s 0 0 68.96374 0 181 56.00000 68.96374 23.1% - 0s 0 0 68.66797 0 182 56.00000 68.66797 22.6% - 0s 0 0 68.45628 0 179 56.00000 68.45628 22.2% - 0s 0 0 68.28807 0 181 56.00000 68.28807 21.9% - 0s 0 0 68.17423 0 182 56.00000 68.17423 21.7% - 0s 0 0 68.11307 0 181 56.00000 68.11307 21.6% - 0s 0 0 68.10918 0 180 56.00000 68.10918 21.6% - 0s 0 0 68.05038 0 182 56.00000 68.05038 21.5% - 0s H 0 0 58.0000000 68.05038 17.3% - 0s 0 0 68.04568 0 183 58.00000 68.04568 17.3% - 0s 0 0 68.04568 0 182 58.00000 68.04568 17.3% - 0s 0 2 68.04567 0 180 58.00000 68.04567 17.3% - 0s H 434 179 59.0000000 65.60000 11.2% 46.9 1s 616 245 60.20000 16 180 59.00000 65.18561 10.5% 45.6 5s 2243 736 62.60000 28 142 59.00000 63.66887 7.91% 44.2 10s * 5423 677 41 60.0000000 62.00000 3.33% 35.6 14s 5737 473 cutoff 28 60.00000 61.55882 2.60% 35.1 15s Cutting planes: Gomory: 4 Zero half: 71 Mod-K: 1 Explored 6268 nodes (210002 simplex iterations) in 15.28 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%