Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:44 2012 Optimize a model with 439 rows, 132 columns and 878 nonzeros Presolve removed 89 rows and 2 columns Presolve time: 0.00s Presolved: 350 rows, 130 columns, 752 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 5.600000e+01, 205 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 56.00000 0 106 44.00000 56.00000 27.3% - 0s 0 0 55.00000 0 118 44.00000 55.00000 25.0% - 0s H 0 0 47.0000000 55.00000 17.0% - 0s 0 0 54.50000 0 105 47.00000 54.50000 16.0% - 0s 0 0 54.22535 0 125 47.00000 54.22535 15.4% - 0s 0 0 53.70175 0 123 47.00000 53.70175 14.3% - 0s H 0 0 48.0000000 53.70175 11.9% - 0s 0 0 53.45810 0 122 48.00000 53.45810 11.4% - 0s 0 0 53.18182 0 126 48.00000 53.18182 10.8% - 0s 0 0 52.86087 0 122 48.00000 52.86087 10.1% - 0s 0 0 52.74340 0 126 48.00000 52.74340 9.88% - 0s 0 0 52.67438 0 126 48.00000 52.67438 9.74% - 0s 0 0 52.55999 0 123 48.00000 52.55999 9.50% - 0s 0 0 52.53356 0 124 48.00000 52.53356 9.44% - 0s 0 0 52.53356 0 118 48.00000 52.53356 9.44% - 0s 0 2 52.52657 0 118 48.00000 52.52657 9.43% - 0s H 10 10 49.0000000 52.51368 7.17% 40.5 0s * 58 5 5 50.0000000 51.33333 2.67% 33.0 0s Cutting planes: Gomory: 1 Zero half: 89 Explored 65 nodes (3037 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%