Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:47:12 2013 Optimize a model with 280 rows, 2100 columns and 11250 nonzeros Presolve removed 10 rows and 10 columns Presolve time: 0.01s Presolved: 270 rows, 2090 columns, 10240 nonzeros Variable types: 2020 continuous, 70 integer (70 binary) Root relaxation: objective 1.836170e+04, 118 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 18361.7044 0 3 - 18361.7044 - - 0s 0 0 18362.2378 0 3 - 18362.2378 - - 0s 0 0 18381.2294 0 3 - 18381.2294 - - 0s 0 0 18394.8305 0 12 - 18394.8305 - - 0s 0 0 18399.9340 0 12 - 18399.9340 - - 0s 0 0 18399.9340 0 12 - 18399.9340 - - 0s H 0 0 18570.834575 18399.9340 0.92% - 0s 0 0 18415.8485 0 5 18570.8346 18415.8485 0.83% - 0s 0 0 18415.9012 0 6 18570.8346 18415.9012 0.83% - 0s 0 0 18415.9012 0 6 18570.8346 18415.9012 0.83% - 0s H 0 0 18418.263500 18415.9012 0.01% - 0s 0 1 18418.1710 0 2 18418.2635 18418.1710 0.00% - 0s Cutting planes: Gomory: 1 Flow cover: 1 Explored 1 nodes (580 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.841826350024e+04, best bound 1.841817096645e+04, gap 0.0005%