Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:56:58 2012 Optimize a model with 283 rows, 165 columns and 870 nonzeros Presolve time: 0.00s Presolved: 283 rows, 165 columns, 870 nonzeros Variable types: 0 continuous, 165 integer (165 binary) Found heuristic solution: objective 73.0000000 Found heuristic solution: objective 69.0000000 Root relaxation: objective 0.000000e+00, 44 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 24 69.00000 0.00000 100% - 0s 0 0 0.91887 0 38 69.00000 0.91887 98.7% - 0s H 0 0 67.0000000 0.91887 98.6% - 0s 0 0 1.05000 0 26 67.00000 1.05000 98.4% - 0s 0 0 1.07437 0 47 67.00000 1.07437 98.4% - 0s 0 0 1.10000 0 26 67.00000 1.10000 98.4% - 0s 0 0 1.10000 0 26 67.00000 1.10000 98.4% - 0s 0 0 1.10000 0 26 67.00000 1.10000 98.4% - 0s 0 0 1.10000 0 26 67.00000 1.10000 98.4% - 0s H 0 0 65.0000000 1.10000 98.3% - 0s H 0 0 64.0000000 1.10000 98.3% - 0s 0 2 1.19530 0 26 64.00000 1.19530 98.1% - 0s * 183 97 15 63.0000000 20.25000 67.9% 27.0 0s * 194 103 14 62.0000000 20.68333 66.6% 26.8 0s * 206 101 15 61.0000000 20.68333 66.1% 25.7 0s * 232 105 15 60.0000000 20.70000 65.5% 24.9 0s * 294 124 14 58.0000000 23.20000 60.0% 24.7 0s * 320 139 14 56.0000000 23.23125 58.5% 24.6 0s * 369 138 14 55.0000000 26.75000 51.4% 23.8 0s Cutting planes: Gomory: 1 Mod-K: 2 Explored 2641 nodes (52434 simplex iterations) in 1.46 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%