Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:30:53 2013 Optimize a model with 2400 rows, 103200 columns and 208100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.75s Presolved: 2200 rows, 102900 columns, 205800 nonzeros Variable types: 102000 continuous, 900 integer (900 binary) Root relaxation: objective 9.188392e+05, 6980 iterations, 0.85 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 - - 1s H 0 0 1111274.5456 918839.221 17.3% - 2s H 0 0 1010072.4967 918839.221 9.03% - 2s 0 0 918950.768 0 4 1010072.50 918950.768 9.02% - 3s 0 0 918992.767 0 3 1010072.50 918992.767 9.02% - 3s 0 0 918996.973 0 2 1010072.50 918996.973 9.02% - 4s 0 0 918998.365 0 2 1010072.50 918998.365 9.02% - 4s 0 0 918998.365 0 2 1010072.50 918998.365 9.02% - 5s 0 0 918999.658 0 2 1010072.50 918999.658 9.02% - 5s 0 0 918999.909 0 2 1010072.50 918999.909 9.02% - 6s 0 0 919000.395 0 2 1010072.50 919000.395 9.02% - 6s 0 0 919000.588 0 2 1010072.50 919000.588 9.02% - 6s 0 0 919000.588 0 2 1010072.50 919000.588 9.02% - 7s 0 2 919006.607 0 2 1010072.50 919006.607 9.02% - 8s 14 16 919324.213 14 1 1010072.50 919063.320 9.01% 41.4 10s H 27 6 919941.52890 919063.320 0.10% 22.3 11s 127 4 919578.594 127 1 919941.529 919063.320 0.10% 6.6 15s H 243 3 919369.63105 919076.918 0.03% 5.7 19s 250 4 919081.146 1 2 919369.631 919081.146 0.03% 6.6 20s Cutting planes: Flow cover: 21 Explored 262 nodes (10301 simplex iterations) in 20.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193696310472e+05, best bound 9.192837780476e+05, gap 0.0093%