Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:04 2012 Optimize a model with 484 rows, 136 columns and 968 nonzeros Presolve removed 101 rows and 2 columns Presolve time: 0.00s Presolved: 383 rows, 134 columns, 830 nonzeros Variable types: 0 continuous, 134 integer (134 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.600000e+01, 232 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 0 108 43.00000 56.00000 30.2% - 0s 0 0 55.00000 0 106 43.00000 55.00000 27.9% - 0s H 0 0 44.0000000 55.00000 25.0% - 0s 0 0 54.58824 0 129 44.00000 54.58824 24.1% - 0s 0 0 54.00000 0 129 44.00000 54.00000 22.7% - 0s 0 0 53.90000 0 130 44.00000 53.90000 22.5% - 0s H 0 0 46.0000000 53.90000 17.2% - 0s 0 0 53.66667 0 128 46.00000 53.66667 16.7% - 0s 0 0 53.42691 0 130 46.00000 53.42691 16.1% - 0s 0 0 53.09542 0 131 46.00000 53.09542 15.4% - 0s H 0 0 49.0000000 53.09542 8.36% - 0s 0 0 52.94342 0 130 49.00000 52.94342 8.05% - 0s 0 0 52.78965 0 132 49.00000 52.78965 7.73% - 0s 0 0 52.74417 0 133 49.00000 52.74417 7.64% - 0s 0 0 52.70404 0 133 49.00000 52.70404 7.56% - 0s 0 0 52.70404 0 133 49.00000 52.70404 7.56% - 0s 0 2 52.69030 0 133 49.00000 52.69030 7.53% - 0s Cutting planes: Gomory: 2 Zero half: 121 Explored 135 nodes (5970 simplex iterations) in 0.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%