Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:10 2013 Optimize a model with 520 rows, 4460 columns and 9500 nonzeros Presolve removed 40 rows and 40 columns Presolve time: 0.03s Presolved: 480 rows, 4420 columns, 9360 nonzeros Variable types: 4240 continuous, 180 integer (180 binary) Root relaxation: objective 3.573401e+04, 456 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35734.0139 0 3 - 35734.0139 - - 0s 0 0 35786.6170 0 4 - 35786.6170 - - 0s 0 0 35788.0697 0 4 - 35788.0697 - - 0s 0 0 35788.0697 0 4 - 35788.0697 - - 0s 0 0 35788.0697 0 4 - 35788.0697 - - 0s H 0 0 36173.213881 35788.0697 1.06% - 0s 0 2 35811.6994 0 4 36173.2139 35811.6994 1.00% - 0s Cutting planes: Gomory: 3 Flow cover: 8 Explored 34 nodes (1200 simplex iterations) in 0.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.617321388123e+04, best bound 3.617321388123e+04, gap 0.0%