Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:01 2012 Optimize a model with 169 rows, 123 columns and 543 nonzeros Presolve time: 0.00s Presolved: 169 rows, 123 columns, 543 nonzeros Variable types: 0 continuous, 123 integer (123 binary) Found heuristic solution: objective 42.0000000 Found heuristic solution: objective 39.0000000 Root relaxation: objective 0.000000e+00, 59 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 39 39.00000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.68058 0 41 30.00000 0.68058 97.7% - 0s H 0 0 28.0000000 0.68058 97.6% - 0s 0 0 0.87697 0 43 28.00000 0.87697 96.9% - 0s 0 0 0.89721 0 43 28.00000 0.89721 96.8% - 0s 0 0 0.90207 0 44 28.00000 0.90207 96.8% - 0s 0 2 0.92856 0 44 28.00000 0.92856 96.7% - 0s * 13 13 8 19.0000000 3.50000 81.6% 27.7 0s * 30 14 8 18.0000000 3.50877 80.5% 22.2 0s * 47 15 7 16.0000000 7.05263 55.9% 22.3 0s * 50 15 10 15.0000000 7.05263 53.0% 21.3 0s Cutting planes: Gomory: 1 Zero half: 2 Mod-K: 1 Explored 88 nodes (1863 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%