Gurobi 5.0.1 (linux64) logging started Wed Dec 19 18:39:14 2012 Optimize a model with 3842 rows, 3721 columns and 22283 nonzeros Presolve removed 2653 rows and 2860 columns Presolve time: 0.08s Presolved: 1189 rows, 861 columns, 10160 nonzeros Variable types: 50 continuous, 811 integer (811 binary) Root relaxation: objective 5.832495e+02, 172 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 583.24950 0 47 - 583.24950 - - 0s 0 0 588.00847 0 30 - 588.00847 - - 0s 0 0 588.15926 0 27 - 588.15926 - - 0s 0 0 588.71189 0 31 - 588.71189 - - 0s 0 0 589.15926 0 28 - 589.15926 - - 0s 0 0 589.15926 0 30 - 589.15926 - - 0s 0 0 589.40926 0 33 - 589.40926 - - 0s 0 0 590.65926 0 18 - 590.65926 - - 0s 0 0 590.65926 0 18 - 590.65926 - - 0s H 0 0 603.0000000 590.65926 2.05% - 0s 0 0 590.65926 0 24 603.00000 590.65926 2.05% - 0s 0 0 591.00512 0 26 603.00000 591.00512 1.99% - 0s 0 0 591.30890 0 25 603.00000 591.30890 1.94% - 0s 0 0 591.57895 0 31 603.00000 591.57895 1.89% - 0s 0 0 591.57895 0 31 603.00000 591.57895 1.89% - 0s 0 0 591.57895 0 19 603.00000 591.57895 1.89% - 0s 0 0 591.57895 0 15 603.00000 591.57895 1.89% - 0s 0 2 593.70312 0 15 603.00000 593.70312 1.54% - 0s Cutting planes: Gomory: 3 Cover: 2 MIR: 2 GUB cover: 2 Explored 11 nodes (790 simplex iterations) in 0.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.030000000000e+02, best bound 6.030000000000e+02, gap 0.0%