Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:59:51 2013 Optimize a model with 58596 rows, 57836 columns and 231116 nonzeros Presolve removed 4206 rows and 0 columns Presolve time: 0.37s Presolved: 54390 rows, 57836 columns, 222704 nonzeros Variable types: 57760 continuous, 76 integer (76 binary) Root relaxation: objective 9.224895e+04, 14187 iterations, 2.98 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 92248.9532 0 3 - 92248.9532 - - 3s H 0 0 95041.000000 92248.9532 2.94% - 3s 0 0 92249.8249 0 4 95041.0000 92249.8249 2.94% - 4s 0 0 92249.9952 0 4 95041.0000 92249.9952 2.94% - 4s 0 2 92251.4248 0 4 95041.0000 92251.4248 2.94% - 6s H 2 2 94039.000000 92265.6265 1.89% 45.0 6s * 4 3 4 92315.000000 92315.0000 0.0% 127 7s Cutting planes: Gomory: 1 Flow cover: 4 Explored 5 nodes (14720 simplex iterations) in 7.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.231500000000e+04, best bound 9.231500000000e+04, gap 0.0%