Gurobi 5.0.1 (linux64) logging started Wed Dec 19 14:01:18 2012 Optimize a model with 442 rows, 441 columns and 1939 nonzeros Presolve removed 286 rows and 236 columns Presolve time: 0.01s Presolved: 156 rows, 205 columns, 1299 nonzeros Variable types: 20 continuous, 185 integer (185 binary) Root relaxation: objective 2.314285e+02, 57 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 231.42851 0 19 - 231.42851 - - 0s 0 0 244.00000 0 18 - 244.00000 - - 0s 0 0 244.00000 0 14 - 244.00000 - - 0s * 0 0 0 244.0000000 244.00000 0.0% - 0s Cutting planes: Cover: 2 Implied bound: 5 Clique: 2 MIR: 5 GUB cover: 2 Mod-K: 1 Explored 0 nodes (123 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.440000000000e+02, best bound 2.440000000000e+02, gap 0.0%