Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:43:50 2013 Optimize a model with 400 rows, 4420 columns and 9340 nonzeros Presolve removed 20 rows and 140 columns Presolve time: 0.01s Presolved: 380 rows, 4280 columns, 9140 nonzeros Variable types: 4220 continuous, 60 integer (60 binary) Root relaxation: objective 3.709539e+04, 414 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37095.3933 0 4 - 37095.3933 - - 0s 0 0 37118.8012 0 3 - 37118.8012 - - 0s 0 0 37118.8012 0 3 - 37118.8012 - - 0s 0 0 37120.1646 0 4 - 37120.1646 - - 0s 0 0 37122.0855 0 2 - 37122.0855 - - 0s 0 0 37122.0855 0 2 - 37122.0855 - - 0s 0 0 37122.0855 0 2 - 37122.0855 - - 0s 0 0 37122.0855 0 2 - 37122.0855 - - 0s 0 0 37122.0855 0 2 - 37122.0855 - - 0s H 0 0 37252.786539 37122.0855 0.35% - 0s 0 2 37153.6257 0 1 37252.7865 37153.6257 0.27% - 0s * 4 0 3 37250.989291 37250.9893 0.0% 22.2 0s Cutting planes: Flow cover: 8 Explored 5 nodes (768 simplex iterations) in 0.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.725098929094e+04, best bound 3.725098929094e+04, gap 0.0%