Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:01:09 2013 Optimize a model with 47971 rows, 4356 columns and 145926 nonzeros Presolve removed 6021 rows and 2248 columns Presolve time: 0.38s Presolved: 41950 rows, 2108 columns, 127487 nonzeros Variable types: 26 continuous, 2082 integer (2082 binary) Found heuristic solution: objective 86213.000000 Root relaxation: objective 6.926880e+04, 7900 iterations, 0.63 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 69268.7986 0 11 86213.0000 69268.7986 19.7% - 1s H 0 0 69288.000000 69268.7986 0.03% - 1s H 0 0 69283.000000 69268.7986 0.02% - 1s H 0 0 69278.000000 69268.7986 0.01% - 1s 0 0 69270.6184 0 20 69278.0000 69270.6184 0.01% - 1s 0 0 69270.6184 0 11 69278.0000 69270.6184 0.01% - 1s 0 0 69270.6184 0 24 69278.0000 69270.6184 0.01% - 1s 0 0 69271.0386 0 27 69278.0000 69271.0386 0.01% - 1s 0 2 69271.1849 0 25 69278.0000 69271.1849 0.01% - 1s Cutting planes: MIR: 9 Explored 1 nodes (9330 simplex iterations) in 1.68 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.927800000000e+04, best bound 6.927200000000e+04, gap 0.0087%