Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:55:37 2013 Optimize a model with 12635 rows, 12285 columns and 49035 nonzeros Presolve removed 883 rows and 0 columns Presolve time: 0.06s Presolved: 11752 rows, 12285 columns, 47269 nonzeros Variable types: 12250 continuous, 35 integer (35 binary) Root relaxation: objective 3.880768e+04, 1653 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38807.6838 0 3 - 38807.6838 - - 0s H 0 0 38949.000000 38807.6838 0.36% - 0s H 0 0 38812.000000 38807.6838 0.01% - 0s 0 0 38810.9600 0 2 38812.0000 38810.9600 0.00% - 0s Cutting planes: Gomory: 1 Flow cover: 9 Explored 0 nodes (1663 simplex iterations) in 0.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.881200000000e+04, best bound 3.881096000000e+04, gap 0.0027%