Gurobi 5.0.1 (linux64) logging started Mon Feb 4 17:08:42 2013 Optimize a model with 4991 rows, 961 columns and 15376 nonzeros Presolve removed 1154 rows and 509 columns Presolve time: 0.04s Presolved: 3837 rows, 452 columns, 11847 nonzeros Variable types: 12 continuous, 440 integer (440 binary) Found heuristic solution: objective 20728.000000 Root relaxation: objective 1.778596e+04, 1596 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 17785.9630 0 9 20728.0000 17785.9630 14.2% - 0s H 0 0 17800.000000 17785.9630 0.08% - 0s 0 0 17786.7536 0 17 17800.0000 17786.7536 0.07% - 0s 0 0 17786.7536 0 9 17800.0000 17786.7536 0.07% - 0s 0 0 17786.9299 0 19 17800.0000 17786.9299 0.07% - 0s 0 1 17786.9305 0 19 17800.0000 17786.9305 0.07% - 0s H 3 3 17798.000000 17786.9305 0.06% 0.0 0s H 4 3 17795.000000 17786.9658 0.05% 0.0 0s H 7 5 17793.000000 17790.0982 0.02% 0.0 0s H 12 8 17791.000000 17790.1937 0.00% 0.0 0s Cutting planes: Gomory: 2 MIR: 6 Zero half: 3 Explored 12 nodes (2079 simplex iterations) in 0.17 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.779100000000e+04, best bound 1.779100000000e+04, gap 0.0%