Gurobi 5.0.1 (linux64) logging started Mon Dec 10 23:29:46 2012 Optimize a model with 2190 rows, 2160 columns and 7147 nonzeros Presolve removed 90 rows and 51 columns Presolve time: 0.02s Presolved: 2100 rows, 2109 columns, 6946 nonzeros Variable types: 1400 continuous, 709 integer (709 binary) Root relaxation: objective 1.837647e+05, 1050 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 183764.655 0 365 - 183764.655 - - 0s H 0 0 317907.00000 183764.655 42.2% - 0s H 0 0 317574.00000 183764.655 42.1% - 0s 0 0 228419.345 0 79 317574.000 228419.345 28.1% - 0s 0 0 230193.906 0 35 317574.000 230193.906 27.5% - 0s 0 0 230418.409 0 18 317574.000 230418.409 27.4% - 0s 0 0 230509.047 0 22 317574.000 230509.047 27.4% - 0s 0 0 230509.047 0 22 317574.000 230509.047 27.4% - 0s H 0 0 231066.00000 230509.047 0.24% - 0s 0 2 230517.768 0 21 231066.000 230517.768 0.24% - 0s H 3 3 231051.00000 230517.768 0.23% 2.0 0s * 19 17 16 230976.00000 230517.768 0.20% 3.2 0s H 27 22 230807.00000 230517.768 0.13% 2.8 0s * 55 16 8 230690.00000 230520.044 0.07% 2.7 0s H 64 9 230633.00000 230532.497 0.04% 2.8 0s * 68 5 9 230570.00000 230532.497 0.02% 2.9 0s * 74 3 6 230540.00000 230536.810 0.00% 2.8 0s Cutting planes: Gomory: 29 Cover: 8 Implied bound: 2 Flow cover: 209 Flow path: 155 Explored 75 nodes (1753 simplex iterations) in 0.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.305400000000e+05, best bound 2.305368095274e+05, gap 0.0014%