Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:12:29 2013 Optimize a model with 561 rows, 26061 columns and 52071 nonzeros Presolve time: 0.04s Presolved: 561 rows, 26061 columns, 52071 nonzeros Variable types: 26010 continuous, 51 integer (51 binary) Root relaxation: objective 5.299289e+04, 990 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 52992.8949 0 9 - 52992.8949 - - 0s H 0 0 55879.000000 52992.8949 5.16% - 0s 0 0 53253.7546 0 10 55879.0000 53253.7546 4.70% - 0s 0 0 53266.4877 0 5 55879.0000 53266.4877 4.68% - 0s H 0 0 55395.000000 53266.4877 3.84% - 0s 0 0 53276.9752 0 7 55395.0000 53276.9752 3.82% - 0s 0 0 53284.7356 0 8 55395.0000 53284.7356 3.81% - 0s H 0 0 54704.000000 53284.7356 2.59% - 0s 0 0 53290.9332 0 7 54704.0000 53290.9332 2.58% - 0s 0 0 53291.0911 0 6 54704.0000 53291.0911 2.58% - 0s 0 0 53291.0924 0 6 54704.0000 53291.0924 2.58% - 0s 0 0 53291.0966 0 6 54704.0000 53291.0966 2.58% - 0s H 0 0 53689.000000 53291.0966 0.74% - 0s 0 2 53291.9114 0 6 53689.0000 53291.9114 0.74% - 0s H 13 11 53663.663515 53366.1758 0.55% 34.4 0s H 14 11 53653.304348 53366.1758 0.54% 32.2 0s H 15 11 53563.390441 53366.1758 0.37% 32.7 0s * 19 10 18 53472.000000 53366.1758 0.20% 29.3 0s H 27 9 53462.000000 53374.6471 0.16% 33.0 0s * 30 11 10 53452.000000 53374.6471 0.14% 31.6 0s Cutting planes: Implied bound: 102 Flow cover: 11 Explored 45 nodes (2472 simplex iterations) in 1.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.345200000000e+04, best bound 5.344865546218e+04, gap 0.0063%