Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:40 2013 Optimize a model with 506 rows, 21206 columns and 42366 nonzeros Presolve time: 0.03s Presolved: 506 rows, 21206 columns, 42366 nonzeros Variable types: 21160 continuous, 46 integer (46 binary) Root relaxation: objective 4.416983e+04, 698 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44169.8345 0 7 - 44169.8345 - - 0s H 0 0 46672.000000 44169.8345 5.36% - 0s H 0 0 45357.000000 44169.8345 2.62% - 0s 0 0 44658.8162 0 6 45357.0000 44658.8162 1.54% - 0s 0 0 44788.9807 0 6 45357.0000 44788.9807 1.25% - 0s 0 0 44791.4801 0 4 45357.0000 44791.4801 1.25% - 0s 0 0 44798.4723 0 3 45357.0000 44798.4723 1.23% - 0s 0 0 44798.4723 0 3 45357.0000 44798.4723 1.23% - 0s 0 0 44798.4723 0 3 45357.0000 44798.4723 1.23% - 0s H 0 0 45071.000000 44798.4723 0.60% - 0s 0 0 44798.4723 0 7 45071.0000 44798.4723 0.60% - 0s 0 0 44798.4723 0 6 45071.0000 44798.4723 0.60% - 0s 0 0 44798.4723 0 4 45071.0000 44798.4723 0.60% - 0s 0 0 44798.4723 0 4 45071.0000 44798.4723 0.60% - 0s 0 0 44798.4723 0 3 45071.0000 44798.4723 0.60% - 0s 0 0 44798.4723 0 3 45071.0000 44798.4723 0.60% - 0s 0 0 44798.4723 0 3 45071.0000 44798.4723 0.60% - 0s 0 2 44801.5475 0 3 45071.0000 44801.5475 0.60% - 0s H 6 3 45033.000000 44908.9433 0.28% 29.3 0s * 7 4 7 44989.000000 44908.9433 0.18% 25.9 0s Cutting planes: Implied bound: 80 Flow cover: 1 Explored 13 nodes (2092 simplex iterations) in 0.76 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.498900000000e+04, best bound 4.498900000000e+04, gap 0.0%