Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:07 2013 Optimize a model with 2280 rows, 6040 columns and 16020 nonzeros Presolve removed 60 rows and 40 columns Presolve time: 0.09s Presolved: 2220 rows, 6000 columns, 13960 nonzeros Variable types: 5020 continuous, 980 integer (980 binary) Root relaxation: objective 4.370285e+04, 1212 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43702.8549 0 2 - 43702.8549 - - 0s 0 0 43736.9966 0 1 - 43736.9966 - - 0s 0 0 43739.2059 0 1 - 43739.2059 - - 0s 0 0 43739.2059 0 1 - 43739.2059 - - 0s 0 0 43739.2292 0 1 - 43739.2292 - - 0s H 0 0 48096.672504 43739.2292 9.06% - 0s 0 2 43745.3823 0 1 48096.6725 43745.3823 9.05% - 0s H 81 80 44188.741301 43822.8190 0.83% 7.4 0s * 102 77 101 44052.747892 43822.8190 0.52% 7.4 0s H 107 14 43920.073523 43841.3356 0.18% 7.6 1s * 108 10 7 43900.849511 43841.3356 0.14% 8.0 1s Cutting planes: Gomory: 2 Flow cover: 6 Explored 149 nodes (2513 simplex iterations) in 1.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.390084951135e+04, best bound 4.389978879244e+04, gap 0.0024%