Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:40 2012 Optimize a model with 502 rows, 141 columns and 1004 nonzeros Presolve removed 88 rows and 0 columns Presolve time: 0.00s Presolved: 414 rows, 141 columns, 879 nonzeros Variable types: 0 continuous, 141 integer (141 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.816667e+01, 271 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58.16667 0 121 43.00000 58.16667 35.3% - 0s H 0 0 46.0000000 58.16667 26.4% - 0s 0 0 57.71429 0 133 46.00000 57.71429 25.5% - 0s 0 0 57.11716 0 139 46.00000 57.11716 24.2% - 0s H 0 0 47.0000000 57.11716 21.5% - 0s 0 0 56.71429 0 138 47.00000 56.71429 20.7% - 0s 0 0 56.21179 0 139 47.00000 56.21179 19.6% - 0s H 0 0 50.0000000 56.21179 12.4% - 0s 0 0 55.78306 0 138 50.00000 55.78306 11.6% - 0s 0 0 55.55341 0 140 50.00000 55.55341 11.1% - 0s 0 0 55.53629 0 140 50.00000 55.53629 11.1% - 0s 0 0 55.53629 0 140 50.00000 55.53629 11.1% - 0s 0 2 55.53629 0 140 50.00000 55.53629 11.1% - 0s Cutting planes: Gomory: 1 Zero half: 132 Explored 806 nodes (20177 simplex iterations) in 0.71 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%