Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:43:14 2013 Optimize a model with 2600 rows, 102300 columns and 207500 nonzeros Presolve removed 200 rows and 200 columns Presolve time: 0.35s Presolved: 2400 rows, 102100 columns, 206800 nonzeros Variable types: 101200 continuous, 900 integer (900 binary) Root relaxation: objective 9.188392e+05, 6899 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 4 - 918839.221 - - 0s H 0 0 1111274.5456 918839.221 17.3% - 1s H 0 0 1010072.4967 918839.221 9.03% - 1s 0 0 918947.087 0 4 1010072.50 918947.087 9.02% - 1s 0 0 918993.459 0 3 1010072.50 918993.459 9.02% - 1s 0 0 918999.750 0 3 1010072.50 918999.750 9.02% - 2s 0 0 919000.870 0 2 1010072.50 919000.870 9.02% - 2s 0 0 919000.870 0 2 1010072.50 919000.870 9.02% - 2s 0 0 919001.805 0 2 1010072.50 919001.805 9.02% - 2s 0 0 919002.017 0 3 1010072.50 919002.017 9.02% - 2s 0 0 919002.419 0 2 1010072.50 919002.419 9.02% - 3s 0 0 919002.870 0 2 1010072.50 919002.870 9.02% - 3s 0 0 919002.870 0 2 1010072.50 919002.870 9.02% - 3s 0 2 919008.865 0 2 1010072.50 919008.865 9.02% - 4s 3 5 919064.147 2 1 1010072.50 919064.147 9.01% 277 5s H 54 7 919941.52890 919071.162 0.09% 25.6 8s 86 5 919482.118 84 1 919941.529 919071.162 0.09% 17.0 10s 216 5 919831.440 214 1 919941.529 919071.162 0.09% 8.0 15s H 351 6 919369.63105 919233.910 0.01% 13.0 18s Cutting planes: Flow cover: 18 Explored 354 nodes (12935 simplex iterations) in 18.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193696310472e+05, best bound 9.192779831077e+05, gap 0.0100%