Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:19:45 2013 Optimize a model with 3000 rows, 121100 columns and 402800 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.52s Presolved: 2900 rows, 121000 columns, 382700 nonzeros Variable types: 120200 continuous, 800 integer (800 binary) Root relaxation: objective 9.053666e+05, 7139 iterations, 0.65 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 905366.638 0 6 - 905366.638 - - 1s 0 0 905383.842 0 6 - 905383.842 - - 2s 0 0 905393.986 0 6 - 905393.986 - - 2s 0 0 905393.986 0 6 - 905393.986 - - 2s 0 0 905396.229 0 6 - 905396.229 - - 3s 0 0 905396.229 0 6 - 905396.229 - - 3s 0 0 905396.229 0 6 - 905396.229 - - 4s 0 0 905396.266 0 6 - 905396.266 - - 4s 0 0 905396.483 0 6 - 905396.483 - - 4s 0 0 905396.483 0 6 - 905396.483 - - 6s 0 2 905446.043 0 6 - 905446.043 - - 11s 9 11 907412.900 8 3 - 905634.164 - 163 15s 42 44 908056.652 41 2 - 905634.164 - 55.6 20s * 47 16 46 908059.68334 905634.164 0.27% 50.0 20s * 63 16 16 908018.35356 906281.749 0.19% 57.2 21s 71 21 907298.806 8 3 908018.354 906855.150 0.13% 67.1 25s 129 31 907287.985 4 3 908018.354 907287.985 0.08% 62.4 30s Cutting planes: Flow cover: 13 Explored 180 nodes (21054 simplex iterations) in 34.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.080183535562e+05, best bound 9.079333838417e+05, gap 0.0094%