Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:35 2012 Optimize a model with 448 rows, 128 columns and 896 nonzeros Presolve removed 85 rows and 3 columns Presolve time: 0.00s Presolved: 363 rows, 125 columns, 770 nonzeros Variable types: 0 continuous, 125 integer (125 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 5.500000e+01, 189 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55.00000 0 98 44.00000 55.00000 25.0% - 0s 0 0 53.26923 0 122 44.00000 53.26923 21.1% - 0s 0 0 52.52273 0 123 44.00000 52.52273 19.4% - 0s 0 0 51.81356 0 124 44.00000 51.81356 17.8% - 0s 0 0 51.53712 0 122 44.00000 51.53712 17.1% - 0s 0 0 51.30804 0 123 44.00000 51.30804 16.6% - 0s H 0 0 45.0000000 51.30804 14.0% - 0s 0 0 51.18657 0 123 45.00000 51.18657 13.7% - 0s H 0 0 46.0000000 51.18657 11.3% - 0s 0 0 51.03866 0 124 46.00000 51.03866 11.0% - 0s 0 0 50.85285 0 124 46.00000 50.85285 10.5% - 0s 0 0 50.72600 0 125 46.00000 50.72600 10.3% - 0s 0 0 50.64815 0 124 46.00000 50.64815 10.1% - 0s 0 0 50.63982 0 124 46.00000 50.63982 10.1% - 0s 0 0 50.63982 0 123 46.00000 50.63982 10.1% - 0s H 0 0 47.0000000 50.63982 7.74% - 0s 0 2 50.63949 0 123 47.00000 50.63949 7.74% - 0s Cutting planes: Gomory: 1 Zero half: 102 Explored 87 nodes (3946 simplex iterations) in 0.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%