Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:24:10 2013 Optimize a model with 6017 rows, 1089 columns and 18513 nonzeros Presolve removed 905 rows and 557 columns Presolve time: 0.04s Presolved: 5112 rows, 532 columns, 15815 nonzeros Variable types: 16 continuous, 516 integer (516 binary) Found heuristic solution: objective 18808.000000 Root relaxation: objective 1.272318e+04, 2155 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12723.1778 0 4 18808.0000 12723.1778 32.4% - 0s H 0 0 12727.000000 12723.1778 0.03% - 0s 0 0 12724.1086 0 10 12727.0000 12724.1086 0.02% - 0s 0 0 12724.1086 0 5 12727.0000 12724.1086 0.02% - 0s 0 0 12724.2119 0 16 12727.0000 12724.2119 0.02% - 0s 0 0 12724.4818 0 21 12727.0000 12724.4818 0.02% - 0s 0 0 12724.7301 0 19 12727.0000 12724.7301 0.02% - 0s 0 0 12724.9964 0 20 12727.0000 12724.9964 0.02% - 0s 0 1 12725.0247 0 20 12727.0000 12725.0247 0.02% - 0s Cutting planes: Gomory: 3 Implied bound: 3 MIR: 2 Explored 5 nodes (2324 simplex iterations) in 0.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.272700000000e+04, best bound 1.272700000000e+04, gap 0.0%