Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:43:08 2013 Optimize a model with 9919 rows, 1521 columns and 30420 nonzeros Presolve removed 1125 rows and 773 columns Presolve time: 0.06s Presolved: 8794 rows, 748 columns, 26994 nonzeros Variable types: 17 continuous, 731 integer (731 binary) Found heuristic solution: objective 35029.000000 Root relaxation: objective 2.701162e+04, 3051 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 27011.6154 0 9 35029.0000 27011.6154 22.9% - 0s H 0 0 27033.000000 27011.6154 0.08% - 0s H 0 0 27027.000000 27011.6154 0.06% - 0s H 0 0 27024.000000 27011.6154 0.05% - 0s 0 0 27012.0000 0 12 27024.0000 27012.0000 0.04% - 0s 0 0 27012.0000 0 12 27024.0000 27012.0000 0.04% - 0s 0 0 27012.0000 0 16 27024.0000 27012.0000 0.04% - 0s H 0 0 27022.000000 27012.0000 0.04% - 0s 0 2 27012.5938 0 16 27022.0000 27012.5938 0.03% - 0s H 4 3 27021.000000 27012.5938 0.03% 13.2 0s H 16 11 27020.000000 27013.7300 0.02% 26.1 0s * 43 18 28 27019.000000 27014.7749 0.02% 13.3 0s Cutting planes: Gomory: 5 Implied bound: 1 MIR: 19 Zero half: 3 Explored 78 nodes (4275 simplex iterations) in 0.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.701900000000e+04, best bound 2.701700000000e+04, gap 0.0074%