Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:32 2012 Optimize a model with 377 rows, 126 columns and 754 nonzeros Presolve removed 71 rows and 4 columns Presolve time: 0.00s Presolved: 306 rows, 122 columns, 645 nonzeros Variable types: 0 continuous, 122 integer (122 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.500000e+01, 178 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 46.00000 55.00000 19.6% - 0s 0 0 54.00000 0 94 46.00000 54.00000 17.4% - 0s 0 0 53.80000 0 113 46.00000 53.80000 17.0% - 0s 0 0 53.28571 0 114 46.00000 53.28571 15.8% - 0s H 0 0 47.0000000 53.28571 13.4% - 0s 0 0 52.90909 0 112 47.00000 52.90909 12.6% - 0s H 0 0 48.0000000 52.90909 10.2% - 0s 0 0 52.61538 0 115 48.00000 52.61538 9.62% - 0s 0 0 52.33735 0 116 48.00000 52.33735 9.04% - 0s 0 0 52.03169 0 116 48.00000 52.03169 8.40% - 0s 0 0 51.94203 0 115 48.00000 51.94203 8.21% - 0s 0 0 51.80000 0 111 48.00000 51.80000 7.92% - 0s 0 0 51.77473 0 112 48.00000 51.77473 7.86% - 0s 0 0 51.77473 0 107 48.00000 51.77473 7.86% - 0s 0 2 51.77473 0 107 48.00000 51.77473 7.86% - 0s H 39 8 49.0000000 51.45349 5.01% 20.0 0s * 63 5 11 50.0000000 51.08383 2.17% 19.0 0s Cutting planes: Gomory: 1 Zero half: 64 Explored 69 nodes (2077 simplex iterations) in 0.10 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%