Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:09:06 2013 Optimize a model with 539 rows, 24059 columns and 48069 nonzeros Presolve time: 0.03s Presolved: 539 rows, 24059 columns, 48069 nonzeros Variable types: 24010 continuous, 49 integer (49 binary) Root relaxation: objective 4.836579e+04, 905 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 48365.7927 0 8 - 48365.7927 - - 0s H 0 0 51350.000000 48365.7927 5.81% - 0s 0 0 48702.7246 0 4 51350.0000 48702.7246 5.16% - 0s H 0 0 49938.000000 48702.7246 2.47% - 0s 0 0 48734.2300 0 5 49938.0000 48734.2300 2.41% - 0s H 0 0 49908.000000 48734.2300 2.35% - 0s 0 0 48734.4696 0 4 49908.0000 48734.4696 2.35% - 0s H 0 0 49891.000000 48734.4696 2.32% - 0s 0 0 48737.4359 0 2 49891.0000 48737.4359 2.31% - 0s 0 0 48738.1795 0 2 49891.0000 48738.1795 2.31% - 0s 0 0 48738.3846 0 1 49891.0000 48738.3846 2.31% - 0s H 0 0 49540.307692 48738.3846 1.62% - 0s H 0 0 49228.000000 48738.3846 0.99% - 0s 0 0 48738.3846 0 1 49228.0000 48738.3846 0.99% - 0s H 0 0 49068.000000 48738.3846 0.67% - 0s 0 2 48738.4658 0 1 49068.0000 48738.4658 0.67% - 0s * 20 4 6 49029.000000 48883.7167 0.30% 45.8 0s * 30 5 11 48941.000000 48893.9481 0.10% 37.6 0s Cutting planes: Implied bound: 94 Flow cover: 5 Explored 36 nodes (2358 simplex iterations) in 0.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.894100000000e+04, best bound 4.894100000000e+04, gap 0.0%