Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:41 2013 Optimize a model with 2140 rows, 3020 columns and 10010 nonzeros Presolve removed 30 rows and 20 columns Presolve time: 0.16s Presolved: 2110 rows, 3000 columns, 7980 nonzeros Variable types: 2010 continuous, 990 integer (990 binary) Root relaxation: objective 1.997658e+04, 834 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19976.5790 0 2 - 19976.5790 - - 0s 0 0 20063.0046 0 4 - 20063.0046 - - 0s 0 0 20096.6562 0 4 - 20096.6562 - - 0s H 0 0 20286.922528 20096.6562 0.94% - 0s 0 0 20106.0420 0 4 20286.9225 20106.0420 0.89% - 0s H 0 0 20194.486832 20106.0420 0.44% - 0s 0 0 20106.0420 0 2 20194.4868 20106.0420 0.44% - 0s 0 0 20106.0420 0 4 20194.4868 20106.0420 0.44% - 0s 0 0 20106.0420 0 4 20194.4868 20106.0420 0.44% - 0s 0 2 20107.9815 0 4 20194.4868 20107.9815 0.43% - 0s H 39 18 20180.539297 20140.9299 0.20% 2.3 0s * 40 16 39 20179.925527 20140.9299 0.19% 2.9 0s H 54 19 20172.219705 20140.9536 0.15% 2.8 0s * 87 41 45 20163.805507 20140.9536 0.11% 3.6 0s * 167 92 4 20159.742505 20143.3024 0.08% 4.3 0s * 168 91 5 20158.964704 20143.4758 0.08% 4.6 0s * 308 137 13 20158.445957 20146.2647 0.06% 5.4 0s Cutting planes: Flow cover: 5 Explored 627 nodes (4672 simplex iterations) in 0.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.015844595680e+04, best bound 2.015646472965e+04, gap 0.0098%