Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:33:14 2013 Optimize a model with 2200 rows, 103800 columns and 214900 nonzeros Presolve removed 100 rows and 1300 columns Presolve time: 0.25s Presolved: 2100 rows, 102500 columns, 212900 nonzeros Variable types: 102100 continuous, 400 integer (400 binary) Root relaxation: objective 9.481640e+05, 5892 iterations, 0.41 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 948163.962 0 8 - 948163.962 - - 0s H 0 0 1150046.3192 948163.962 17.6% - 1s 0 0 948321.135 0 8 1150046.32 948321.135 17.5% - 1s 0 0 948362.888 0 8 1150046.32 948362.888 17.5% - 1s 0 0 948366.209 0 8 1150046.32 948366.209 17.5% - 2s 0 0 948373.252 0 8 1150046.32 948373.252 17.5% - 2s 0 0 948377.671 0 8 1150046.32 948377.671 17.5% - 2s 0 0 948377.671 0 8 1150046.32 948377.671 17.5% - 2s 0 0 948377.695 0 8 1150046.32 948377.695 17.5% - 2s 0 0 948377.740 0 8 1150046.32 948377.740 17.5% - 3s 0 0 948377.740 0 8 1150046.32 948377.740 17.5% - 4s 0 2 948383.170 0 8 1150046.32 948383.170 17.5% - 5s H 27 21 950377.30622 948477.693 0.20% 91.9 8s 48 20 949894.239 44 2 950377.306 948477.693 0.20% 53.4 10s 118 20 949849.340 4 2 950377.306 949400.928 0.10% 60.6 15s * 165 20 26 950276.23626 949737.730 0.06% 63.0 18s 217 8 cutoff 23 950276.236 950131.078 0.02% 53.8 20s Cutting planes: Flow cover: 17 Explored 221 nodes (19300 simplex iterations) in 20.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.502762362556e+05, best bound 9.502059930357e+05, gap 0.0074%