Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:07:46 2013 Optimize a model with 2028 rows, 6044 columns and 16082 nonzeros Presolve removed 828 rows and 2446 columns Presolve time: 0.19s Presolved: 1200 rows, 3598 columns, 7196 nonzeros Variable types: 2404 continuous, 1194 integer (1194 binary) Root relaxation: objective 7.659086e+03, 5 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 7659.08578 0 1 - 7659.08578 - - 0s H 0 0 7673.8627950 7659.08578 0.19% - 0s H 0 0 7664.8067361 7659.08578 0.07% - 0s 0 0 7664.38369 0 2 7664.80674 7664.38369 0.01% - 0s Cutting planes: Cover: 1 Explored 0 nodes (201 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.664806736066e+03, best bound 7.664383686964e+03, gap 0.0055%