Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:40 2013 Optimize a model with 560 rows, 6200 columns and 26500 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.03s Presolved: 540 rows, 6180 columns, 24480 nonzeros Variable types: 6040 continuous, 140 integer (140 binary) Root relaxation: objective 4.013975e+04, 383 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40139.7487 0 6 - 40139.7487 - - 0s 0 0 40139.7487 0 6 - 40139.7487 - - 0s 0 0 40139.7487 0 6 - 40139.7487 - - 0s 0 0 40139.8591 0 6 - 40139.8591 - - 0s 0 0 40139.8591 0 6 - 40139.8591 - - 0s H 0 0 40238.726267 40139.8591 0.25% - 0s 0 1 40147.7455 0 6 40238.7263 40147.7455 0.23% - 0s * 8 3 8 40195.179678 40194.1911 0.00% 19.2 0s Cutting planes: Flow cover: 3 Explored 9 nodes (869 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.019517967753e+04, best bound 4.019419109853e+04, gap 0.0025%