Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:42 2013 Optimize a model with 428 rows, 1244 columns and 3282 nonzeros Presolve removed 395 rows and 1141 columns Presolve time: 0.04s Presolved: 33 rows, 103 columns, 206 nonzeros Variable types: 76 continuous, 27 integer (27 binary) Root relaxation: objective 3.881594e+03, 6 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3881.59364 0 1 - 3881.59364 - - 0s 0 0 3881.86365 0 1 - 3881.86365 - - 0s 0 0 3893.87067 0 2 - 3893.87067 - - 0s 0 0 3893.87080 0 2 - 3893.87080 - - 0s 0 0 3893.88670 0 2 - 3893.88670 - - 0s H 0 0 3893.8998644 3893.88670 0.00% - 0s Cutting planes: Cover: 2 Implied bound: 1 Flow cover: 2 Explored 0 nodes (38 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.893899864365e+03, best bound 3.893886702111e+03, gap 0.0003%