Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:55:18 2013 Optimize a model with 1900 rows, 101700 columns and 204100 nonzeros Presolve removed 200 rows and 300 columns Presolve time: 0.69s Presolved: 1700 rows, 101400 columns, 202800 nonzeros Variable types: 101000 continuous, 400 integer (400 binary) Root relaxation: objective 9.188392e+05, 7922 iterations, 0.96 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 1008922.4953 918839.221 8.93% - 2s H 0 0 964242.10084 918839.221 4.71% - 2s 0 0 918950.802 0 4 964242.101 918950.802 4.70% - 2s H 0 0 926269.25049 918950.802 0.79% - 3s 0 0 918991.369 0 3 926269.250 918991.369 0.79% - 3s 0 0 918994.998 0 3 926269.250 918994.998 0.79% - 3s 0 0 918998.930 0 2 926269.250 918998.930 0.78% - 4s 0 0 918998.930 0 2 926269.250 918998.930 0.78% - 4s 0 0 918998.930 0 2 926269.250 918998.930 0.78% - 5s 0 0 918998.930 0 2 926269.250 918998.930 0.78% - 5s 0 0 918998.930 0 2 926269.250 918998.930 0.78% - 6s 0 0 918998.930 0 2 926269.250 918998.930 0.78% - 6s 0 2 919002.574 0 2 926269.250 919002.574 0.78% - 7s 17 16 919356.891 16 1 926269.250 919049.563 0.78% 66.4 10s H 27 3 919655.74906 919049.563 0.07% 42.6 10s * 91 4 8 919365.22666 919067.834 0.03% 17.7 13s 101 1 cutoff 3 919365.227 919364.497 0.00% 26.5 15s Cutting planes: Flow cover: 18 Explored 102 nodes (11753 simplex iterations) in 15.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.193652266644e+05, best bound 9.193644974252e+05, gap 0.0001%