Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:08 2013 Optimize a model with 23568 rows, 23088 columns and 92208 nonzeros Presolve removed 1651 rows and 0 columns Presolve time: 0.13s Presolved: 21917 rows, 23088 columns, 88906 nonzeros Variable types: 23040 continuous, 48 integer (48 binary) Root relaxation: objective 4.722396e+04, 4037 iterations, 0.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47223.9631 0 5 - 47223.9631 - - 0s H 0 0 47912.000000 47223.9631 1.44% - 0s H 0 0 47575.000000 47223.9631 0.74% - 0s 0 0 47226.5209 0 6 47575.0000 47226.5209 0.73% - 0s 0 0 47226.6980 0 6 47575.0000 47226.6980 0.73% - 0s 0 0 47226.8415 0 7 47575.0000 47226.8415 0.73% - 1s 0 0 47227.0460 0 6 47575.0000 47227.0460 0.73% - 1s 0 0 47227.0688 0 7 47575.0000 47227.0688 0.73% - 1s 0 0 47227.0919 0 8 47575.0000 47227.0919 0.73% - 1s 0 0 47227.1261 0 7 47575.0000 47227.1261 0.73% - 1s 0 0 47435.4270 0 3 47575.0000 47435.4270 0.29% - 1s 0 0 47437.0040 0 2 47575.0000 47437.0040 0.29% - 1s H 0 0 47493.000000 47437.0040 0.12% - 2s 0 0 47437.0040 0 2 47493.0000 47437.0040 0.12% - 2s 0 0 47437.0175 0 3 47493.0000 47437.0175 0.12% - 2s 0 0 47437.0388 0 3 47493.0000 47437.0388 0.12% - 2s 0 0 47437.1932 0 3 47493.0000 47437.1932 0.12% - 2s 0 2 47442.3924 0 3 47493.0000 47442.3924 0.11% - 2s Cutting planes: Gomory: 1 Flow cover: 1 Explored 4 nodes (5372 simplex iterations) in 2.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.749300000000e+04, best bound 4.749300000000e+04, gap 0.0%