Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:44:53 2012 Optimize a model with 301 rows, 231 columns and 981 nonzeros Presolve time: 0.00s Presolved: 301 rows, 231 columns, 981 nonzeros Variable types: 0 continuous, 231 integer (231 binary) Found heuristic solution: objective 69.0000000 Found heuristic solution: objective 66.0000000 Root relaxation: objective 0.000000e+00, 116 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 80 66.00000 0.00000 100% - 0s H 0 0 58.0000000 0.00000 100% - 0s H 0 0 48.0000000 0.00000 100% - 0s 0 0 0.50000 0 81 48.00000 0.50000 99.0% - 0s H 0 0 47.0000000 0.50000 98.9% - 0s 0 0 0.55339 0 83 47.00000 0.55339 98.8% - 0s H 0 0 45.0000000 0.55339 98.8% - 0s 0 0 0.57692 0 82 45.00000 0.57692 98.7% - 0s H 0 0 43.0000000 0.57692 98.7% - 0s 0 0 0.59857 0 84 43.00000 0.59857 98.6% - 0s 0 0 0.59857 0 84 43.00000 0.59857 98.6% - 0s H 0 0 39.0000000 0.59857 98.5% - 0s H 0 0 38.0000000 0.59857 98.4% - 0s H 0 0 35.0000000 0.59857 98.3% - 0s 0 2 0.62393 0 84 35.00000 0.62393 98.2% - 0s * 31 31 18 29.0000000 3.32692 88.5% 30.5 0s H 54 44 26.0000000 3.40724 86.9% 30.7 0s * 182 74 12 21.0000000 9.44000 55.0% 27.1 0s Cutting planes: Gomory: 1 Zero half: 1 Mod-K: 2 Explored 745 nodes (15798 simplex iterations) in 0.53 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%