Gurobi 5.0.1 (linux64) logging started Fri Jan 18 03:55:06 2013 Optimize a model with 2800 rows, 111000 columns and 292500 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.36s Presolved: 2700 rows, 110900 columns, 282400 nonzeros Variable types: 110200 continuous, 700 integer (700 binary) Root relaxation: objective 9.188392e+05, 6585 iterations, 0.45 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 918839.221 0 12 - 918839.221 - - 1s 0 0 918905.722 0 12 - 918905.722 - - 1s 0 0 918921.106 0 11 - 918921.106 - - 1s 0 0 918922.247 0 11 - 918922.247 - - 2s 0 0 918931.037 0 12 - 918931.037 - - 2s 0 0 918934.534 0 12 - 918934.534 - - 2s 0 0 918934.941 0 12 - 918934.941 - - 3s 0 0 918936.165 0 13 - 918936.165 - - 3s 0 0 918936.971 0 13 - 918936.971 - - 4s 0 0 918936.971 0 13 - 918936.971 - - 5s 0 2 918940.695 0 13 - 918940.695 - - 9s 2 4 918991.046 2 10 - 918984.088 - 289 10s 26 28 919536.301 23 3 - 919050.739 - 71.9 15s 59 61 919970.876 56 3 - 919050.739 - 36.0 20s 99 101 920963.943 96 3 - 919050.739 - 24.8 25s 208 210 922251.140 205 1 - 919050.739 - 13.6 30s * 209 145 206 922252.17631 919050.739 0.35% 13.5 30s H 240 14 919373.45818 919054.027 0.03% 15.5 34s 242 14 919319.013 31 3 919373.458 919054.027 0.03% 15.4 35s * 252 15 38 919373.12438 919054.027 0.03% 15.1 35s Cutting planes: Flow cover: 23 Explored 293 nodes (15099 simplex iterations) in 38.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193731243770e+05, best bound 9.192828672397e+05, gap 0.0098%