Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:12 2012 Optimize a model with 265 rows, 106 columns and 530 nonzeros Presolve removed 91 rows and 19 columns Presolve time: 0.00s Presolved: 174 rows, 87 columns, 365 nonzeros Variable types: 0 continuous, 87 integer (87 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 4.900000e+01, 111 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 49.00000 0 72 44.00000 49.00000 11.4% - 0s H 0 0 45.0000000 49.00000 8.89% - 0s 0 0 48.50000 0 81 45.00000 48.50000 7.78% - 0s H 0 0 46.0000000 48.50000 5.43% - 0s 0 0 47.66667 0 81 46.00000 47.66667 3.62% - 0s 0 0 47.62500 0 84 46.00000 47.62500 3.53% - 0s 0 0 47.50000 0 73 46.00000 47.50000 3.26% - 0s 0 0 47.50000 0 63 46.00000 47.50000 3.26% - 0s 0 0 47.36364 0 84 46.00000 47.36364 2.96% - 0s 0 0 47.17647 0 68 46.00000 47.17647 2.56% - 0s 0 0 47.00000 0 61 46.00000 47.00000 2.17% - 0s 0 0 cutoff 0 46.00000 46.99995 2.17% - 0s Cutting planes: Zero half: 60 Explored 0 nodes (367 simplex iterations) in 0.02 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%