Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:42:22 2013 Optimize a model with 1400 rows, 100500 columns and 201000 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.30s Presolved: 1600 rows, 100600 columns, 201300 nonzeros Variable types: 100400 continuous, 200 integer (200 binary) Root relaxation: objective 9.188392e+05, 6656 iterations, 0.72 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 918839.221 0 8 - 918839.221 - - 1s H 0 0 944579.43994 918839.221 2.73% - 2s H 0 0 943391.91312 918839.221 2.60% - 2s 0 0 918950.768 0 8 943391.913 918950.768 2.59% - 2s H 0 0 921451.51041 918950.768 0.27% - 3s 0 0 918990.780 0 6 921451.510 918990.780 0.27% - 3s 0 0 918994.023 0 6 921451.510 918994.023 0.27% - 3s 0 0 918996.489 0 4 921451.510 918996.489 0.27% - 4s 0 0 918998.115 0 4 921451.510 918998.115 0.27% - 4s 0 0 918998.115 0 4 921451.510 918998.115 0.27% - 4s 0 0 918999.248 0 4 921451.510 918999.248 0.27% - 5s 0 0 918999.248 0 4 921451.510 918999.248 0.27% - 5s 0 0 918999.534 0 4 921451.510 918999.534 0.27% - 5s 0 0 918999.821 0 4 921451.510 918999.821 0.27% - 6s 0 0 918999.882 0 4 921451.510 918999.882 0.27% - 6s 0 0 918999.925 0 4 921451.510 918999.925 0.27% - 6s 0 0 918999.949 0 4 921451.510 918999.949 0.27% - 7s 0 0 918999.954 0 4 921451.510 918999.954 0.27% - 7s 0 0 919000.087 0 4 921451.510 919000.087 0.27% - 8s 0 0 919000.087 0 4 921451.510 919000.087 0.27% - 8s 0 2 919018.731 0 4 921451.510 919018.731 0.26% - 9s 1 3 919030.551 1 4 921451.510 919030.551 0.26% 271 10s * 11 6 10 919347.86857 919039.658 0.03% 104 12s Cutting planes: Flow cover: 25 Explored 30 nodes (11034 simplex iterations) in 14.44 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193478685680e+05, best bound 9.192779854079e+05, gap 0.0076%