Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:25:17 2013 Optimize a model with 71484 rows, 70644 columns and 282324 nonzeros Presolve removed 2992 rows and 0 columns Presolve time: 0.47s Presolved: 68492 rows, 70644 columns, 276340 nonzeros Variable types: 70560 continuous, 84 integer (84 binary) Root relaxation: objective 9.548120e+04, 15257 iterations, 3.78 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 95481.2000 0 1 - 95481.2000 - - 4s H 0 0 95893.000000 95481.2000 0.43% - 4s 0 0 95481.4112 0 2 95893.0000 95481.4112 0.43% - 5s 0 0 95481.4112 0 1 95893.0000 95481.4112 0.43% - 7s 0 0 95482.3900 0 3 95893.0000 95482.3900 0.43% - 8s 0 2 95486.9222 0 3 95893.0000 95486.9222 0.42% - 10s Cutting planes: Gomory: 2 Explored 14 nodes (22573 simplex iterations) in 11.62 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.589300000000e+04, best bound 9.588560000000e+04, gap 0.0077%