Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:59:38 2013 Optimize a model with 451 rows, 16851 columns and 33661 nonzeros Presolve time: 0.02s Presolved: 451 rows, 16851 columns, 33661 nonzeros Variable types: 16810 continuous, 41 integer (41 binary) Root relaxation: objective 4.128450e+04, 738 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41284.4994 0 8 - 41284.4994 - - 0s H 0 0 43605.000000 41284.4994 5.32% - 0s H 0 0 41841.000000 41284.4994 1.33% - 0s 0 0 41728.0080 0 5 41841.0000 41728.0080 0.27% - 0s 0 0 41754.0947 0 4 41841.0000 41754.0947 0.21% - 0s 0 0 41755.8561 0 4 41841.0000 41755.8561 0.20% - 0s 0 0 41756.7493 0 5 41841.0000 41756.7493 0.20% - 0s 0 0 41760.0991 0 4 41841.0000 41760.0991 0.19% - 0s 0 0 41760.4651 0 4 41841.0000 41760.4651 0.19% - 0s 0 0 41760.4881 0 5 41841.0000 41760.4881 0.19% - 0s 0 0 41768.3700 0 2 41841.0000 41768.3700 0.17% - 0s H 0 0 41775.000000 41768.3700 0.02% - 0s 0 0 41768.3700 0 3 41775.0000 41768.3700 0.02% - 0s 0 0 41768.3700 0 3 41775.0000 41768.3700 0.02% - 0s 0 0 41768.3700 0 2 41775.0000 41768.3700 0.02% - 0s 0 0 41770.4545 0 1 41775.0000 41770.4545 0.01% - 0s 0 0 41772.0909 0 1 41775.0000 41772.0909 0.01% - 0s Cutting planes: Implied bound: 34 Flow cover: 3 Explored 0 nodes (1523 simplex iterations) in 0.44 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.177500000000e+04, best bound 4.177209090909e+04, gap 0.0070%