Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:35 2013 Optimize a model with 30 rows, 532 columns and 4437 nonzeros Presolve removed 12 rows and 124 columns Presolve time: 0.01s Presolved: 18 rows, 408 columns, 4014 nonzeros Variable types: 400 continuous, 8 integer (8 binary) Root relaxation: objective 3.501964e+03, 9 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3501.96355 0 3 - 3501.96355 - - 0s 0 0 3501.96798 0 3 - 3501.96798 - - 0s 0 0 3501.96798 0 3 - 3501.96798 - - 0s H 0 0 3502.0000000 3501.96798 0.00% - 0s Cutting planes: Implied bound: 1 Flow cover: 3 Explored 0 nodes (21 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.502000000000e+03, best bound 3.501967975291e+03, gap 0.0009%