Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:06:02 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 5.078782e+04, 930 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50787.8202 0 8 - 50787.8202 - - 0s H 0 0 52917.000000 50787.8202 4.02% - 0s 0 0 50969.5851 0 4 52917.0000 50969.5851 3.68% - 0s H 0 0 52868.154026 50969.5851 3.59% - 0s H 0 0 52550.000000 50969.5851 3.01% - 0s 0 0 51002.1827 0 3 52550.0000 51002.1827 2.95% - 0s H 0 0 52512.000000 51002.1827 2.88% - 0s 0 0 51012.8317 0 4 52512.0000 51012.8317 2.85% - 0s H 0 0 52505.000000 51012.8317 2.84% - 0s 0 0 51014.9365 0 5 52505.0000 51014.9365 2.84% - 0s H 0 0 52477.000000 51014.9365 2.79% - 0s 0 0 51016.6610 0 5 52477.0000 51016.6610 2.78% - 0s 0 0 51018.2389 0 4 52477.0000 51018.2389 2.78% - 0s 0 0 51019.6009 0 3 52477.0000 51019.6009 2.78% - 0s H 0 0 52232.998001 51019.6009 2.32% - 0s H 0 0 51821.000000 51019.6009 1.55% - 0s 0 2 51020.5645 0 3 51821.0000 51020.5645 1.54% - 0s H 4 4 51315.000000 51079.0741 0.46% 29.8 0s H 6 4 51305.814815 51079.0741 0.44% 23.7 0s * 7 4 6 51250.000000 51079.0741 0.33% 26.3 0s * 16 1 6 51248.000000 51135.5990 0.22% 30.8 0s H 18 1 51221.507463 51147.4074 0.14% 30.8 0s * 22 1 7 51199.000000 51193.2941 0.01% 31.4 0s Cutting planes: Implied bound: 100 Flow cover: 5 Explored 24 nodes (2014 simplex iterations) in 0.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.119900000000e+04, best bound 5.119900000000e+04, gap 0.0%