Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:53:12 2013 Optimize a model with 13287 rows, 1849 columns and 40678 nonzeros Presolve removed 1676 rows and 945 columns Presolve time: 0.09s Presolved: 11611 rows, 904 columns, 35633 nonzeros Variable types: 20 continuous, 884 integer (884 binary) Found heuristic solution: objective 43452.000000 Root relaxation: objective 3.331683e+04, 4858 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 33316.8333 0 12 43452.0000 33316.8333 23.3% - 0s H 0 0 33346.000000 33316.8333 0.09% - 0s H 0 0 33334.000000 33316.8333 0.05% - 0s 0 0 33317.0000 0 16 33334.0000 33317.0000 0.05% - 0s 0 0 33317.0000 0 11 33334.0000 33317.0000 0.05% - 0s H 0 0 33331.000000 33317.0000 0.04% - 0s 0 0 33317.0000 0 14 33331.0000 33317.0000 0.04% - 0s 0 2 33317.0000 0 11 33331.0000 33317.0000 0.04% - 0s H 5 4 33329.000000 33317.0000 0.04% 2.8 0s H 6 5 33327.000000 33317.0000 0.03% 2.3 0s H 174 69 33324.000000 33318.0916 0.02% 16.7 0s Cutting planes: Gomory: 5 Cover: 4 MIR: 45 Zero half: 10 Explored 463 nodes (12823 simplex iterations) in 0.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.332400000000e+04, best bound 3.332100000000e+04, gap 0.0090%