Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:17:20 2013 Optimize a model with 28726 rows, 28196 columns and 112466 nonzeros Presolve removed 53 rows and 0 columns Presolve time: 0.12s Presolved: 28673 rows, 28196 columns, 112413 nonzeros Variable types: 28143 continuous, 53 integer (53 binary) Root relaxation: objective 5.812893e+04, 6011 iterations, 2.85 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58128.9281 0 46 - 58128.9281 - - 3s H 0 0 75491.000000 58128.9281 23.0% - 5s 0 0 72518.6918 0 3 75491.0000 72518.6918 3.94% - 7s H 0 0 73085.964083 72518.6918 0.78% - 7s H 0 0 72814.000000 72518.6918 0.41% - 7s H 0 0 72569.000000 72518.6918 0.07% - 7s 0 0 72521.7696 0 2 72569.0000 72521.7696 0.07% - 7s 0 0 72533.9000 0 1 72569.0000 72533.9000 0.05% - 7s 0 0 72557.5414 0 1 72569.0000 72557.5414 0.02% - 7s 0 0 72566.0000 0 1 72569.0000 72566.0000 0.00% - 7s Cutting planes: Implied bound: 46 Explored 0 nodes (8712 simplex iterations) in 7.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.256900000000e+04, best bound 7.256600000000e+04, gap 0.0041%