Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:54:27 2013 Optimize a model with 19649 rows, 2401 columns and 60025 nonzeros Presolve removed 2372 rows and 1230 columns Presolve time: 0.14s Presolved: 17277 rows, 1171 columns, 52797 nonzeros Variable types: 21 continuous, 1150 integer (1150 binary) Found heuristic solution: objective 53918.000000 Root relaxation: objective 4.406432e+04, 6471 iterations, 0.38 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44064.3195 0 9 53918.0000 44064.3195 18.3% - 0s H 0 0 44078.000000 44064.3195 0.03% - 0s H 0 0 44072.000000 44064.3195 0.02% - 0s 0 0 44067.5156 0 22 44072.0000 44067.5156 0.01% - 0s 0 0 44067.5156 0 7 44072.0000 44067.5156 0.01% - 0s 0 0 44067.7722 0 22 44072.0000 44067.7722 0.01% - 0s Cutting planes: Gomory: 3 Cover: 1 Implied bound: 2 MIR: 10 Mod-K: 2 Explored 0 nodes (6633 simplex iterations) in 0.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.407200000000e+04, best bound 4.406800000000e+04, gap 0.0091%