Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:19:43 2012 Optimize a model with 221 rows, 173 columns and 723 nonzeros Presolve time: 0.00s Presolved: 221 rows, 173 columns, 723 nonzeros Variable types: 0 continuous, 173 integer (173 binary) Found heuristic solution: objective 57.0000000 Found heuristic solution: objective 47.0000000 Root relaxation: objective 0.000000e+00, 92 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 63 47.00000 0.00000 100% - 0s H 0 0 46.0000000 0.00000 100% - 0s H 0 0 43.0000000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s 0 0 0.62178 0 65 39.00000 0.62178 98.4% - 0s H 0 0 26.0000000 0.62178 97.6% - 0s 0 0 0.65150 0 66 26.00000 0.65150 97.5% - 0s 0 0 0.69622 0 67 26.00000 0.69622 97.3% - 0s 0 0 0.73368 0 67 26.00000 0.73368 97.2% - 0s 0 0 0.76847 0 67 26.00000 0.76847 97.0% - 0s 0 0 0.79801 0 71 26.00000 0.79801 96.9% - 0s 0 0 0.80000 0 67 26.00000 0.80000 96.9% - 0s 0 0 0.80000 0 67 26.00000 0.80000 96.9% - 0s 0 2 0.82759 0 67 26.00000 0.82759 96.8% - 0s * 21 21 14 23.0000000 3.03448 86.8% 26.3 0s * 24 21 16 22.0000000 3.03448 86.2% 24.6 0s * 50 26 18 21.0000000 3.03448 85.6% 24.8 0s * 63 29 10 18.0000000 7.03448 60.9% 25.6 0s Cutting planes: Gomory: 1 Zero half: 8 Mod-K: 1 Explored 266 nodes (5580 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%