Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:53:25 2013 Optimize a model with 14234 rows, 1936 columns and 43560 nonzeros Presolve removed 3391 rows and 1038 columns Presolve time: 0.10s Presolved: 10843 rows, 898 columns, 33181 nonzeros Variable types: 16 continuous, 882 integer (882 binary) Found heuristic solution: objective 43477.000000 Root relaxation: objective 3.456658e+04, 3298 iterations, 0.15 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34566.5833 0 6 43477.0000 34566.5833 20.5% - 0s H 0 0 34577.000000 34566.5833 0.03% - 0s H 0 0 34576.000000 34566.5833 0.03% - 0s H 0 0 34571.000000 34566.5833 0.01% - 0s 0 0 34569.9482 0 19 34571.0000 34569.9482 0.00% - 0s Cutting planes: Gomory: 3 MIR: 4 Mod-K: 1 Explored 0 nodes (3335 simplex iterations) in 0.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.457100000000e+04, best bound 3.457000000000e+04, gap 0.0029%