Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:45 2013 Optimize a model with 660 rows, 2030 columns and 5550 nonzeros Presolve removed 10 rows and 10 columns Presolve time: 0.05s Presolved: 650 rows, 2020 columns, 5040 nonzeros Variable types: 1520 continuous, 500 integer (500 binary) Root relaxation: objective 1.791602e+04, 152 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17916.0191 0 6 - 17916.0191 - - 0s 0 0 17935.0277 0 4 - 17935.0277 - - 0s 0 0 17939.8393 0 4 - 17939.8393 - - 0s 0 0 17945.0086 0 4 - 17945.0086 - - 0s 0 0 17946.8995 0 8 - 17946.8995 - - 0s 0 0 17948.8399 0 4 - 17948.8399 - - 0s 0 0 17950.5965 0 8 - 17950.5965 - - 0s 0 0 17950.7035 0 4 - 17950.7035 - - 0s 0 0 17952.2496 0 8 - 17952.2496 - - 0s 0 0 17952.2567 0 4 - 17952.2567 - - 0s 0 0 17952.2805 0 10 - 17952.2805 - - 0s 0 0 17952.6237 0 10 - 17952.6237 - - 0s 0 0 17952.6287 0 10 - 17952.6287 - - 0s 0 0 17952.6287 0 10 - 17952.6287 - - 0s H 0 0 18046.829906 17952.6287 0.52% - 0s 0 1 17954.7665 0 5 18046.8299 17954.7665 0.51% - 0s * 50 6 43 17984.792630 17984.1440 0.00% 7.6 0s Cutting planes: Gomory: 1 Implied bound: 19 Flow cover: 6 Explored 51 nodes (731 simplex iterations) in 0.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.798479263040e+04, best bound 1.798414404221e+04, gap 0.0036%