Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:53:31 2013 Optimize a model with 319 rows, 8439 columns and 16849 nonzeros Presolve time: 0.01s Presolved: 319 rows, 8439 columns, 16849 nonzeros Variable types: 8410 continuous, 29 integer (29 binary) Root relaxation: objective 2.767080e+04, 287 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 27670.8042 0 6 - 27670.8042 - - 0s H 0 0 28439.000000 27670.8042 2.70% - 0s H 0 0 28081.000000 27670.8042 1.46% - 0s 0 0 27977.2553 0 3 28081.0000 27977.2553 0.37% - 0s 0 0 27984.3137 0 2 28081.0000 27984.3137 0.34% - 0s 0 0 27988.9977 0 2 28081.0000 27988.9977 0.33% - 0s H 0 0 28024.000000 27988.9977 0.12% - 0s 0 0 27989.2086 0 3 28024.0000 27989.2086 0.12% - 0s 0 0 27993.0237 0 2 28024.0000 27993.0237 0.11% - 0s 0 0 27993.2432 0 1 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 1 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 6 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 3 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 2 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 2 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 3 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 2 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 2 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 2 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 3 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 1 28024.0000 27993.2432 0.11% - 0s 0 0 27993.2432 0 1 28024.0000 27993.2432 0.11% - 0s 0 2 27995.0842 0 1 28024.0000 27995.0842 0.10% - 0s * 3 1 3 28017.000000 28017.0000 0.0% 19.3 0s Cutting planes: Implied bound: 54 Flow cover: 4 Explored 4 nodes (924 simplex iterations) in 0.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.801700000000e+04, best bound 2.801700000000e+04, gap 0.0%