Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:52:28 2013 Optimize a model with 1900 rows, 101700 columns and 204100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.71s Presolved: 1700 rows, 101400 columns, 202800 nonzeros Variable types: 101000 continuous, 400 integer (400 binary) Root relaxation: objective 8.654105e+05, 8212 iterations, 0.88 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 865410.545 0 2 - 865410.545 - - 1s H 0 0 898678.98797 865410.545 3.70% - 1s 0 0 865465.499 0 2 898678.988 865465.499 3.70% - 2s 0 0 865509.124 0 2 898678.988 865509.124 3.69% - 2s 0 0 865517.196 0 2 898678.988 865517.196 3.69% - 3s 0 0 865528.342 0 2 898678.988 865528.342 3.69% - 3s 0 0 865531.410 0 2 898678.988 865531.410 3.69% - 3s 0 0 865531.410 0 2 898678.988 865531.410 3.69% - 3s 0 0 865531.410 0 2 898678.988 865531.410 3.69% - 4s 0 0 865531.410 0 2 898678.988 865531.410 3.69% - 4s 0 0 865531.410 0 2 898678.988 865531.410 3.69% - 5s 0 0 865531.410 0 2 898678.988 865531.410 3.69% - 5s 0 2 865566.040 0 2 898678.988 865566.040 3.68% - 5s 24 26 867428.125 23 1 898678.988 866231.143 3.61% 76.0 10s H 27 15 869098.88645 866231.143 0.33% 70.8 10s * 48 13 46 868077.72120 866231.143 0.21% 53.8 12s H 54 5 866990.89656 866643.327 0.04% 66.4 13s 124 9 866927.667 75 1 866990.897 866767.891 0.03% 30.5 15s * 127 8 78 866930.82542 866767.891 0.02% 29.8 15s * 131 4 16 866899.19924 866811.478 0.01% 30.5 15s Cutting planes: Flow cover: 12 Explored 133 nodes (13267 simplex iterations) in 15.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.668991992439e+05, best bound 8.668129519245e+05, gap 0.0099%