Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:37 2012 Optimize a model with 453 rows, 129 columns and 906 nonzeros Presolve removed 92 rows and 1 columns Presolve time: 0.00s Presolved: 361 rows, 128 columns, 782 nonzeros Variable types: 0 continuous, 128 integer (128 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 5.400000e+01, 233 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54.00000 0 111 42.00000 54.00000 28.6% - 0s 0 0 53.33333 0 120 42.00000 53.33333 27.0% - 0s H 0 0 43.0000000 53.33333 24.0% - 0s 0 0 53.02174 0 124 43.00000 53.02174 23.3% - 0s 0 0 52.47727 0 122 43.00000 52.47727 22.0% - 0s H 0 0 44.0000000 52.47727 19.3% - 0s 0 0 51.97895 0 125 44.00000 51.97895 18.1% - 0s 0 0 51.71875 0 126 44.00000 51.71875 17.5% - 0s 0 0 51.48964 0 126 44.00000 51.48964 17.0% - 0s 0 0 51.39139 0 126 44.00000 51.39139 16.8% - 0s 0 0 51.31784 0 126 44.00000 51.31784 16.6% - 0s 0 0 51.24174 0 127 44.00000 51.24174 16.5% - 0s 0 0 51.14297 0 127 44.00000 51.14297 16.2% - 0s 0 0 51.10106 0 128 44.00000 51.10106 16.1% - 0s 0 0 51.04654 0 128 44.00000 51.04654 16.0% - 0s 0 0 51.03891 0 128 44.00000 51.03891 16.0% - 0s 0 0 51.03891 0 127 44.00000 51.03891 16.0% - 0s 0 2 51.03889 0 127 44.00000 51.03889 16.0% - 0s * 11 9 9 45.0000000 51.03702 13.4% 36.6 0s * 68 25 8 46.0000000 50.10842 8.93% 34.8 0s Cutting planes: Gomory: 1 Zero half: 133 Explored 487 nodes (14305 simplex iterations) in 0.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%