Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:43:54 2013 Optimize a model with 420 rows, 4260 columns and 8800 nonzeros Presolve removed 40 rows and 40 columns Presolve time: 0.02s Presolved: 380 rows, 4220 columns, 8660 nonzeros Variable types: 4140 continuous, 80 integer (80 binary) Root relaxation: objective 4.013975e+04, 436 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 2 - 40139.7487 - - 0s 0 0 40139.7487 0 2 - 40139.7487 - - 0s 0 0 40139.7487 0 2 - 40139.7487 - - 0s 0 0 40141.0492 0 2 - 40141.0492 - - 0s 0 0 40141.0492 0 2 - 40141.0492 - - 0s H 0 0 40192.884408 40141.0492 0.13% - 0s 0 1 40147.7455 0 2 40192.8844 40147.7455 0.11% - 0s Cutting planes: Flow cover: 4 Explored 3 nodes (592 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.019288440837e+04, best bound 4.018960229249e+04, gap 0.0082%