Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:16:03 2012 Optimize a model with 401 rows, 228 columns and 1228 nonzeros Presolve time: 0.00s Presolved: 401 rows, 228 columns, 1228 nonzeros Variable types: 0 continuous, 228 integer (228 binary) Found heuristic solution: objective 96.0000000 Found heuristic solution: objective 88.0000000 Root relaxation: objective 0.000000e+00, 58 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 28 88.00000 0.00000 100% - 0s 0 0 0.80769 0 30 88.00000 0.80769 99.1% - 0s 0 0 0.92308 0 30 88.00000 0.92308 99.0% - 0s 0 0 0.94301 0 47 88.00000 0.94301 98.9% - 0s 0 0 1.00000 0 30 88.00000 1.00000 98.9% - 0s 0 0 1.03846 0 30 88.00000 1.03846 98.8% - 0s 0 0 1.03846 0 30 88.00000 1.03846 98.8% - 0s 0 0 1.03846 0 30 88.00000 1.03846 98.8% - 0s 0 0 1.03846 0 30 88.00000 1.03846 98.8% - 0s 0 2 1.50769 0 30 88.00000 1.50769 98.3% - 0s * 211 144 16 87.0000000 28.42857 67.3% 37.5 0s * 296 168 17 86.0000000 28.58300 66.8% 34.5 0s * 431 235 15 84.0000000 34.58824 58.8% 33.5 0s * 455 241 18 83.0000000 34.76923 58.1% 32.9 0s * 1591 343 30 82.0000000 47.52941 42.0% 29.4 1s * 1687 352 29 81.0000000 48.00000 40.7% 29.1 1s * 1814 371 33 80.0000000 48.28571 39.6% 28.7 1s * 1815 361 32 79.0000000 48.28571 38.9% 28.7 1s 5335 601 74.94118 25 134 79.00000 59.89474 24.2% 25.0 5s Cutting planes: Gomory: 1 Mod-K: 3 Explored 10490 nodes (238146 simplex iterations) in 8.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.900000000000e+01, best bound 7.900000000000e+01, gap 0.0%