Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:44 2013 Optimize a model with 432 rows, 846 columns and 2890 nonzeros Presolve removed 80 rows and 142 columns Presolve time: 0.03s Presolved: 352 rows, 704 columns, 2093 nonzeros Variable types: 362 continuous, 342 integer (342 binary) Root relaxation: objective 4.448911e+03, 12 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 4448.91121 0 2 - 4448.91121 - - 0s 0 0 4450.10323 0 3 - 4450.10323 - - 0s 0 0 4453.55235 0 2 - 4453.55235 - - 0s 0 0 4453.79632 0 2 - 4453.79632 - - 0s 0 0 4453.93409 0 2 - 4453.93409 - - 0s 0 0 4454.00156 0 2 - 4454.00156 - - 0s 0 0 4454.06814 0 2 - 4454.06814 - - 0s 0 0 4454.13384 0 2 - 4454.13384 - - 0s 0 0 4454.19868 0 2 - 4454.19868 - - 0s 0 0 4454.26269 0 2 - 4454.26269 - - 0s 0 0 4454.32589 0 2 - 4454.32589 - - 0s 0 0 4454.38829 0 2 - 4454.38829 - - 0s 0 0 4454.44992 0 2 - 4454.44992 - - 0s 0 0 4454.51080 0 2 - 4454.51080 - - 0s 0 0 4454.57094 0 2 - 4454.57094 - - 0s 0 0 4454.63037 0 2 - 4454.63037 - - 0s 0 0 4454.68909 0 2 - 4454.68909 - - 0s 0 2 4454.68909 0 2 - 4454.68909 - - 0s * 21 6 14 4458.9448858 4458.94489 0.0% 12.9 0s Cutting planes: Gomory: 1 Cover: 3 Flow cover: 2 Explored 22 nodes (338 simplex iterations) in 0.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.458944885800e+03, best bound 4.458944885800e+03, gap 0.0%