Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:07:16 2013 Optimize a model with 2000 rows, 101100 columns and 203800 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.28s Presolved: 1900 rows, 101000 columns, 203200 nonzeros Variable types: 100700 continuous, 300 integer (300 binary) Root relaxation: objective 8.654105e+05, 6933 iterations, 0.59 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 4 - 865410.545 - - 1s H 0 0 898678.98797 865410.545 3.70% - 1s 0 0 865464.095 0 4 898678.988 865464.095 3.70% - 1s 0 0 865503.712 0 4 898678.988 865503.712 3.69% - 1s 0 0 865511.884 0 4 898678.988 865511.884 3.69% - 2s 0 0 865524.980 0 4 898678.988 865524.980 3.69% - 2s 0 0 865527.012 0 4 898678.988 865527.012 3.69% - 2s 0 0 865527.012 0 4 898678.988 865527.012 3.69% - 3s 0 0 865527.012 0 4 898678.988 865527.012 3.69% - 3s 0 0 865527.012 0 5 898678.988 865527.012 3.69% - 4s 0 0 865533.276 0 2 898678.988 865533.276 3.69% - 4s 0 0 865534.416 0 2 898678.988 865534.416 3.69% - 4s 0 0 865534.777 0 2 898678.988 865534.777 3.69% - 5s 0 0 865535.318 0 2 898678.988 865535.318 3.69% - 5s 0 0 865535.318 0 2 898678.988 865535.318 3.69% - 5s 0 2 865557.838 0 2 898678.988 865557.838 3.69% - 6s 26 28 866801.667 25 2 898678.988 866443.739 3.59% 46.4 10s H 27 9 866990.89656 866443.739 0.06% 44.7 10s * 46 10 45 866930.82542 866443.739 0.06% 28.0 10s * 68 8 18 866899.19924 866770.650 0.01% 48.5 12s * 72 4 17 866846.99594 866770.650 0.01% 46.1 12s Cutting planes: Flow cover: 17 Explored 73 nodes (11491 simplex iterations) in 12.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.668469959374e+05, best bound 8.667706496003e+05, gap 0.0088%