Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:13 2013 Optimize a model with 440 rows, 4340 columns and 9520 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.01s Presolved: 420 rows, 4320 columns, 9300 nonzeros Variable types: 4240 continuous, 80 integer (80 binary) Root relaxation: objective 3.839329e+04, 393 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38393.2919 0 6 - 38393.2919 - - 0s 0 0 38420.7397 0 6 - 38420.7397 - - 0s 0 0 38443.7500 0 10 - 38443.7500 - - 0s 0 0 38444.5715 0 10 - 38444.5715 - - 0s 0 0 38445.8217 0 10 - 38445.8217 - - 0s 0 0 38455.1401 0 10 - 38455.1401 - - 0s 0 0 38464.0100 0 10 - 38464.0100 - - 0s 0 0 38467.3449 0 10 - 38467.3449 - - 0s 0 0 38468.6908 0 10 - 38468.6908 - - 0s 0 0 38469.2990 0 10 - 38469.2990 - - 0s 0 0 38473.0890 0 10 - 38473.0890 - - 0s 0 0 38473.1633 0 10 - 38473.1633 - - 0s 0 0 38473.1876 0 10 - 38473.1876 - - 0s 0 0 38473.1876 0 10 - 38473.1876 - - 0s H 0 0 41563.260880 38473.1876 7.43% - 0s 0 2 38474.7593 0 10 41563.2609 38474.7593 7.43% - 0s * 14 10 13 38634.233867 38517.2099 0.30% 19.5 0s Cutting planes: Flow cover: 14 Explored 22 nodes (1087 simplex iterations) in 0.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.863423386685e+04, best bound 3.863423386685e+04, gap 0.0%