Gurobi 5.0.1 (linux64) logging started Sun Dec 9 06:10:56 2012 Optimize a model with 570 rows, 540 columns and 1781 nonzeros Presolve removed 35 rows and 19 columns Presolve time: 0.01s Presolved: 535 rows, 521 columns, 1705 nonzeros Variable types: 344 continuous, 177 integer (177 binary) Root relaxation: objective 4.444670e+04, 249 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44446.7030 0 78 - 44446.7030 - - 0s H 0 0 68920.000000 44446.7030 35.5% - 0s 0 0 52479.0427 0 23 68920.0000 52479.0427 23.9% - 0s 0 0 52975.5821 0 10 68920.0000 52975.5821 23.1% - 0s 0 0 53043.5521 0 10 68920.0000 53043.5521 23.0% - 0s 0 0 53045.6617 0 13 68920.0000 53045.6617 23.0% - 0s 0 0 53046.7373 0 8 68920.0000 53046.7373 23.0% - 0s H 0 0 54366.000000 53046.7373 2.43% - 0s 0 2 53054.8196 0 8 54366.0000 53054.8196 2.41% - 0s H 30 30 54179.000000 53054.8196 2.07% 2.3 0s * 31 28 30 53691.000000 53054.8196 1.18% 2.4 0s * 60 46 26 53653.000000 53086.8918 1.06% 2.3 0s * 90 63 29 53465.000000 53092.7435 0.70% 2.3 0s * 119 70 26 53409.000000 53096.5917 0.58% 2.3 0s * 184 74 26 53324.000000 53115.9699 0.39% 2.3 0s * 208 80 21 53291.000000 53116.8293 0.33% 2.3 0s * 258 87 18 53281.000000 53136.9265 0.27% 2.3 0s * 299 88 17 53273.000000 53143.9851 0.24% 2.3 0s Cutting planes: Gomory: 8 Cover: 2 Flow cover: 60 Flow path: 36 Explored 577 nodes (1715 simplex iterations) in 0.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.327300000000e+04, best bound 5.326775332163e+04, gap 0.0098%