Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:43:09 2013 Optimize a model with 9919 rows, 1521 columns and 30420 nonzeros Presolve removed 1979 rows and 805 columns Presolve time: 0.07s Presolved: 7940 rows, 716 columns, 24179 nonzeros Variable types: 10 continuous, 706 integer (706 binary) Found heuristic solution: objective 34835.000000 Root relaxation: objective 2.716576e+04, 1592 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 27165.7619 0 8 34835.0000 27165.7619 22.0% - 0s H 0 0 27175.000000 27165.7619 0.03% - 0s 0 0 27166.5664 0 21 27175.0000 27166.5664 0.03% - 0s 0 0 27166.5664 0 6 27175.0000 27166.5664 0.03% - 0s 0 0 27166.5664 0 22 27175.0000 27166.5664 0.03% - 0s H 0 0 27174.000000 27166.5664 0.03% - 0s 0 1 27166.6299 0 22 27174.0000 27166.6299 0.03% - 0s H 4 2 27173.000000 27166.9252 0.02% 0.0 0s H 9 6 27172.000000 27168.7140 0.01% 0.0 0s Cutting planes: Gomory: 4 Cover: 1 MIR: 8 Zero half: 1 Explored 13 nodes (2053 simplex iterations) in 0.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.717200000000e+04, best bound 2.717000000000e+04, gap 0.0074%