Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:31:01 2013 Optimize a model with 52632 rows, 51912 columns and 207432 nonzeros Presolve removed 3350 rows and 0 columns Presolve time: 0.32s Presolved: 49282 rows, 51912 columns, 200732 nonzeros Variable types: 51840 continuous, 72 integer (72 binary) Root relaxation: objective 7.981971e+04, 9689 iterations, 1.70 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 79819.7078 0 1 - 79819.7078 - - 2s H 0 0 80496.000000 79819.7078 0.84% - 2s 0 0 79819.9922 0 2 80496.0000 79819.9922 0.84% - 2s 0 0 79819.9922 0 2 80496.0000 79819.9922 0.84% - 3s 0 0 79819.9922 0 1 80496.0000 79819.9922 0.84% - 6s 0 0 79819.9922 0 2 80496.0000 79819.9922 0.84% - 6s 0 0 79819.9922 0 2 80496.0000 79819.9922 0.84% - 7s 0 2 79827.9500 0 2 80496.0000 79827.9500 0.83% - 8s H 5 5 80148.763976 79978.1284 0.21% 120 9s H 6 3 80013.958333 79978.1284 0.04% 106 9s * 7 1 6 79993.000000 79978.1284 0.02% 92.6 9s Cutting planes: Gomory: 1 Flow cover: 3 Explored 9 nodes (16372 simplex iterations) in 9.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.999300000000e+04, best bound 7.999300000000e+04, gap 0.0%