Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:06:11 2013 Optimize a model with 517 rows, 22137 columns and 44227 nonzeros Presolve time: 0.03s Presolved: 517 rows, 22137 columns, 44227 nonzeros Variable types: 22090 continuous, 47 integer (47 binary) Root relaxation: objective 5.032219e+04, 1145 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50322.1876 0 6 - 50322.1876 - - 0s H 0 0 52459.000000 50322.1876 4.07% - 0s 0 0 50641.6523 0 3 52459.0000 50641.6523 3.46% - 0s H 0 0 51703.510204 50641.6523 2.05% - 0s H 0 0 51366.000000 50641.6523 1.41% - 0s 0 0 50697.9027 0 2 51366.0000 50697.9027 1.30% - 0s H 0 0 51155.000000 50697.9027 0.89% - 0s 0 0 50705.4371 0 4 51155.0000 50705.4371 0.88% - 0s 0 0 50712.0850 0 3 51155.0000 50712.0850 0.87% - 0s 0 0 50712.5653 0 3 51155.0000 50712.5653 0.86% - 0s H 0 0 51140.000000 50712.5653 0.84% - 0s 0 0 50712.9304 0 2 51140.0000 50712.9304 0.84% - 0s 0 0 50712.9304 0 2 51140.0000 50712.9304 0.84% - 0s 0 2 50730.8791 0 2 51140.0000 50730.8791 0.80% - 0s H 4 3 51020.318681 50918.1201 0.20% 61.8 0s * 16 4 6 51017.000000 50953.0000 0.13% 29.6 0s H 18 2 50983.312500 50966.5000 0.03% 27.3 0s * 20 3 6 50983.000000 50970.1771 0.03% 25.2 0s Cutting planes: Implied bound: 113 Flow cover: 9 Explored 24 nodes (1953 simplex iterations) in 0.65 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.098300000000e+04, best bound 5.097994951923e+04, gap 0.0060%