Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:57:06 2012 Optimize a model with 277 rows, 162 columns and 852 nonzeros Presolve time: 0.00s Presolved: 277 rows, 162 columns, 852 nonzeros Variable types: 0 continuous, 162 integer (162 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 0.000000e+00, 46 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 75.00000 0.00000 100% - 0s H 0 0 70.0000000 0.00000 100% - 0s H 0 0 68.0000000 0.00000 100% - 0s 0 0 0.66667 0 26 68.00000 0.66667 99.0% - 0s H 0 0 66.0000000 0.66667 99.0% - 0s 0 0 0.94766 0 42 66.00000 0.94766 98.6% - 0s 0 0 1.11111 0 26 66.00000 1.11111 98.3% - 0s 0 0 1.11111 0 26 66.00000 1.11111 98.3% - 0s 0 0 1.11111 0 26 66.00000 1.11111 98.3% - 0s H 0 0 64.0000000 1.11111 98.3% - 0s 0 2 1.12257 0 26 64.00000 1.12257 98.2% - 0s * 23 23 12 62.0000000 9.05983 85.4% 32.1 0s H 198 115 61.0000000 22.00000 63.9% 23.9 0s * 218 120 15 59.0000000 22.00000 62.7% 23.0 0s * 741 280 28 58.0000000 30.57143 47.3% 22.0 0s * 944 245 28 57.0000000 30.57143 46.4% 22.0 0s * 1679 217 26 55.0000000 38.00000 30.9% 20.6 0s Cutting planes: Gomory: 1 Mod-K: 2 Explored 3819 nodes (70148 simplex iterations) in 2.07 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%