Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:47:01 2013 Optimize a model with 280 rows, 3650 columns and 22150 nonzeros Presolve removed 10 rows and 570 columns Presolve time: 0.03s Presolved: 270 rows, 3080 columns, 20150 nonzeros Variable types: 3010 continuous, 70 integer (70 binary) Root relaxation: objective 2.337984e+04, 138 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 23379.8401 0 4 - 23379.8401 - - 0s 0 0 23380.9849 0 4 - 23380.9849 - - 0s 0 0 23512.7227 0 7 - 23512.7227 - - 0s 0 0 23512.7227 0 7 - 23512.7227 - - 0s H 0 0 24505.275686 23512.7227 4.05% - 0s 0 2 23512.7227 0 7 24505.2757 23512.7227 4.05% - 0s * 25 13 21 23572.094420 23512.7227 0.25% 6.0 0s * 27 10 21 23571.979997 23512.7227 0.25% 5.6 0s * 43 11 14 23558.383411 23521.3253 0.16% 4.7 0s H 55 9 23553.820361 23523.3914 0.13% 4.1 0s * 60 10 13 23552.771836 23523.3914 0.12% 4.0 0s * 75 6 12 23530.799222 23523.9131 0.03% 3.6 0s * 77 3 12 23530.700530 23523.9131 0.03% 3.6 0s * 93 2 9 23527.305205 23525.7636 0.01% 3.3 0s Cutting planes: Flow cover: 1 Explored 94 nodes (707 simplex iterations) in 0.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.352730520463e+04, best bound 2.352576363818e+04, gap 0.0066%