Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:01:27 2013 Optimize a model with 473 rows, 18533 columns and 37023 nonzeros Presolve time: 0.03s Presolved: 473 rows, 18533 columns, 37023 nonzeros Variable types: 18490 continuous, 43 integer (43 binary) Root relaxation: objective 5.029728e+04, 1016 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50297.2754 0 2 - 50297.2754 - - 0s H 0 0 50438.000000 50297.2754 0.28% - 0s 0 0 50340.6658 0 2 50438.0000 50340.6658 0.19% - 0s 0 0 50340.6658 0 2 50438.0000 50340.6658 0.19% - 0s 0 0 50340.6658 0 2 50438.0000 50340.6658 0.19% - 0s 0 0 50341.2634 0 2 50438.0000 50341.2634 0.19% - 0s 0 0 50342.3487 0 2 50438.0000 50342.3487 0.19% - 0s 0 0 50343.4128 0 3 50438.0000 50343.4128 0.19% - 0s 0 0 50343.6089 0 3 50438.0000 50343.6089 0.19% - 0s 0 0 50407.8182 0 1 50438.0000 50407.8182 0.06% - 0s 0 2 50413.0078 0 1 50438.0000 50413.0078 0.05% - 0s * 1 1 1 50432.000000 50413.0078 0.04% 21.0 0s Cutting planes: Implied bound: 56 Flow cover: 2 Explored 3 nodes (1836 simplex iterations) in 0.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.043200000000e+04, best bound 5.043200000000e+04, gap 0.0%