Gurobi 5.0.1 (linux64) logging started Mon Feb 4 19:05:17 2013 Optimize a model with 62268 rows, 5184 columns and 189216 nonzeros Presolve removed 3825 rows and 2607 columns Presolve time: 0.46s Presolved: 58443 rows, 2577 columns, 178019 nonzeros Variable types: 39 continuous, 2538 integer (2538 binary) Found heuristic solution: objective 105064.00000 Root relaxation: objective 7.727923e+04, 28176 iterations, 3.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 77279.2308 0 16 105064.000 77279.2308 26.4% - 3s H 0 0 77294.000000 77279.2308 0.02% - 3s H 0 0 77293.000000 77279.2308 0.02% - 3s H 0 0 77291.000000 77279.2308 0.02% - 3s 0 0 77280.1538 0 20 77291.0000 77280.1538 0.01% - 4s 0 0 77280.1538 0 16 77291.0000 77280.1538 0.01% - 4s H 0 0 77290.000000 77280.1538 0.01% - 4s 0 0 77280.5385 0 25 77290.0000 77280.5385 0.01% - 4s 0 2 77280.5833 0 23 77290.0000 77280.5833 0.01% - 4s 6 6 77280.7179 0 38 77290.0000 77280.7179 0.01% 7.0 5s H 13 9 77288.000000 77282.0453 0.01% 3.2 5s Cutting planes: Gomory: 3 MIR: 20 Zero half: 5 Explored 13 nodes (33783 simplex iterations) in 5.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.728800000000e+04, best bound 7.728300000000e+04, gap 0.0065%