Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:28 2012 Optimize a model with 367 rows, 124 columns and 734 nonzeros Presolve removed 61 rows and 6 columns Presolve time: 0.00s Presolved: 306 rows, 118 columns, 638 nonzeros Variable types: 0 continuous, 118 integer (118 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 5.500000e+01, 169 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 94 44.00000 55.00000 25.0% - 0s 0 0 54.00000 0 112 44.00000 54.00000 22.7% - 0s 0 0 53.35714 0 115 44.00000 53.35714 21.3% - 0s 0 0 52.98214 0 117 44.00000 52.98214 20.4% - 0s H 0 0 45.0000000 52.98214 17.7% - 0s 0 0 52.31933 0 114 45.00000 52.31933 16.3% - 0s H 0 0 46.0000000 52.31933 13.7% - 0s 0 0 52.05903 0 116 46.00000 52.05903 13.2% - 0s H 0 0 47.0000000 52.05903 10.8% - 0s 0 0 51.85357 0 113 47.00000 51.85357 10.3% - 0s H 0 0 48.0000000 51.85357 8.03% - 0s 0 0 51.75082 0 116 48.00000 51.75082 7.81% - 0s 0 0 51.55072 0 117 48.00000 51.55072 7.40% - 0s H 0 0 49.0000000 51.55072 5.21% - 0s 0 0 51.50939 0 117 49.00000 51.50939 5.12% - 0s 0 0 51.50939 0 116 49.00000 51.50939 5.12% - 0s 0 2 51.50570 0 116 49.00000 51.50570 5.11% - 0s Cutting planes: Zero half: 77 Explored 44 nodes (1790 simplex iterations) in 0.09 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%