Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:01:18 2013 Optimize a model with 3200 rows, 151200 columns and 753100 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 1.04s Presolved: 3100 rows, 151100 columns, 703000 nonzeros Variable types: 150200 continuous, 900 integer (900 binary) Root relaxation: objective 8.258498e+05, 6329 iterations, 0.60 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 825849.833 0 3 - 825849.833 - - 2s 0 0 825850.387 0 3 - 825850.387 - - 2s 0 0 825850.464 0 3 - 825850.464 - - 3s 0 0 825850.644 0 3 - 825850.644 - - 3s 0 0 825851.162 0 3 - 825851.162 - - 4s 0 0 825852.010 0 5 - 825852.010 - - 4s 0 0 825852.010 0 5 - 825852.010 - - 5s 0 2 825852.470 0 5 - 825852.470 - - 12s * 6 3 6 826102.66657 825989.224 0.01% 96.0 14s Cutting planes: Flow cover: 5 Explored 8 nodes (7493 simplex iterations) in 14.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.261026665679e+05, best bound 8.261026665679e+05, gap 0.0%