Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:22 2012 Optimize a model with 386 rows, 119 columns and 772 nonzeros Presolve removed 86 rows and 5 columns Presolve time: 0.00s Presolved: 300 rows, 114 columns, 652 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 5.165000e+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 51.65000 0 109 41.00000 51.65000 26.0% - 0s H 0 0 46.0000000 51.65000 12.3% - 0s H 0 0 47.0000000 51.65000 9.89% - 0s 0 0 50.81973 0 109 47.00000 50.81973 8.13% - 0s 0 0 50.39087 0 107 47.00000 50.39087 7.21% - 0s 0 0 49.95588 0 109 47.00000 49.95588 6.29% - 0s 0 0 49.43804 0 110 47.00000 49.43804 5.19% - 0s 0 0 49.29545 0 110 47.00000 49.29545 4.88% - 0s 0 0 49.22043 0 111 47.00000 49.22043 4.72% - 0s 0 0 49.19861 0 111 47.00000 49.19861 4.68% - 0s 0 0 49.19861 0 110 47.00000 49.19861 4.68% - 0s 0 2 49.19818 0 110 47.00000 49.19818 4.68% - 0s Cutting planes: Zero half: 37 Explored 16 nodes (1085 simplex iterations) in 0.07 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%