Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:59:41 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 4.248302e+04, 627 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42483.0205 0 7 - 42483.0205 - - 0s H 0 0 43537.000000 42483.0205 2.42% - 0s 0 0 42692.3103 0 5 43537.0000 42692.3103 1.94% - 0s 0 0 42714.0342 0 5 43537.0000 42714.0342 1.89% - 0s 0 0 42722.9643 0 2 43537.0000 42722.9643 1.87% - 0s 0 0 42723.9922 0 6 43537.0000 42723.9922 1.87% - 0s 0 0 42726.0893 0 2 43537.0000 42726.0893 1.86% - 0s 0 0 42726.0893 0 2 43537.0000 42726.0893 1.86% - 0s 0 0 42727.9159 0 5 43537.0000 42727.9159 1.86% - 0s 0 0 42729.7321 0 2 43537.0000 42729.7321 1.85% - 0s 0 0 42730.4231 0 3 43537.0000 42730.4231 1.85% - 0s 0 0 42730.7695 0 5 43537.0000 42730.7695 1.85% - 0s 0 2 42731.0588 0 5 43537.0000 42731.0588 1.85% - 0s H 1 1 43456.384615 42731.0588 1.67% 0.0 0s H 3 3 43180.807407 42749.5048 1.00% 26.3 0s H 5 4 42780.000000 42752.2308 0.06% 22.6 0s * 7 2 6 42766.000000 42752.2308 0.03% 24.4 0s * 9 0 2 42755.000000 42755.0000 0.0% 24.3 0s Cutting planes: Implied bound: 60 Flow cover: 7 Explored 10 nodes (1107 simplex iterations) in 0.47 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.275500000000e+04, best bound 4.275500000000e+04, gap 0.0%