Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:00:06 2013 Optimize a model with 43744 rows, 4096 columns and 133120 nonzeros Presolve removed 4978 rows and 2103 columns Presolve time: 0.34s Presolved: 38766 rows, 1993 columns, 117884 nonzeros Variable types: 26 continuous, 1967 integer (1967 binary) Found heuristic solution: objective 87967.000000 Root relaxation: objective 6.550605e+04, 10257 iterations, 0.74 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65506.0530 0 10 87967.0000 65506.0530 25.5% - 1s H 0 0 65517.000000 65506.0530 0.02% - 1s 0 0 65508.0157 0 11 65517.0000 65508.0157 0.01% - 1s 0 0 65508.0157 0 8 65517.0000 65508.0157 0.01% - 1s 0 0 65508.0157 0 11 65517.0000 65508.0157 0.01% - 1s H 0 0 65516.000000 65508.0157 0.01% - 1s H 0 0 65511.000000 65508.0157 0.00% - 1s Cutting planes: Gomory: 2 MIR: 3 Explored 0 nodes (12265 simplex iterations) in 1.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.551100000000e+04, best bound 6.550900000000e+04, gap 0.0031%