Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:30:02 2013 Optimize a model with 1600 rows, 100700 columns and 201900 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.33s Presolved: 1500 rows, 100600 columns, 201500 nonzeros Variable types: 100500 continuous, 100 integer (100 binary) Root relaxation: objective 9.188392e+05, 6066 iterations, 0.49 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 918839.221 0 4 - 918839.221 - - 0s H 0 0 943391.91312 918839.221 2.60% - 1s 0 0 918947.334 0 4 943391.913 918947.334 2.59% - 1s H 0 0 921451.51041 918947.334 0.27% - 2s 0 0 918993.613 0 3 921451.510 918993.613 0.27% - 2s 0 0 918996.855 0 2 921451.510 918996.855 0.27% - 2s 0 0 918996.855 0 2 921451.510 918996.855 0.27% - 2s 0 0 919000.733 0 2 921451.510 919000.733 0.27% - 3s 0 0 919000.733 0 2 921451.510 919000.733 0.27% - 3s 0 0 919000.733 0 2 921451.510 919000.733 0.27% - 3s 0 0 919001.322 0 2 921451.510 919001.322 0.27% - 3s 0 0 919001.916 0 2 921451.510 919001.916 0.27% - 4s 0 0 919002.311 0 2 921451.510 919002.311 0.27% - 4s 0 0 919002.889 0 2 921451.510 919002.889 0.27% - 4s 0 0 919002.965 0 2 921451.510 919002.965 0.27% - 5s 0 0 919003.067 0 2 921451.510 919003.067 0.27% - 5s 0 0 919003.067 0 2 921451.510 919003.067 0.27% - 5s 0 2 919009.776 0 2 921451.510 919009.776 0.26% - 6s * 15 3 14 919402.16779 919071.423 0.04% 62.0 7s H 27 2 919347.86857 919211.334 0.01% 64.1 8s Cutting planes: Implied bound: 1 Flow cover: 19 Explored 30 nodes (10336 simplex iterations) in 9.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193478685680e+05, best bound 9.192842681540e+05, gap 0.0069%