Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:53:40 2013 Optimize a model with 15225 rows, 2025 columns and 46575 nonzeros Presolve removed 1849 rows and 1036 columns Presolve time: 0.10s Presolved: 13376 rows, 989 columns, 40925 nonzeros Variable types: 19 continuous, 970 integer (970 binary) Found heuristic solution: objective 50367.000000 Root relaxation: objective 3.978181e+04, 5195 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39781.8077 0 9 50367.0000 39781.8077 21.0% - 0s H 0 0 39806.000000 39781.8077 0.06% - 0s H 0 0 39795.000000 39781.8077 0.03% - 0s H 0 0 39794.000000 39781.8077 0.03% - 0s 0 0 39783.7332 0 30 39794.0000 39783.7332 0.03% - 0s 0 0 39783.7332 0 9 39794.0000 39783.7332 0.03% - 0s H 0 0 39793.000000 39783.7332 0.02% - 0s 0 0 39784.8628 0 24 39793.0000 39784.8628 0.02% - 0s 0 1 39785.2797 0 24 39793.0000 39785.2797 0.02% - 0s H 1 1 39792.000000 39785.2797 0.02% 1.0 0s H 41 5 39789.000000 39787.8211 0.00% 9.5 0s Cutting planes: Gomory: 7 Cover: 1 Clique: 1 MIR: 10 Zero half: 2 Explored 41 nodes (5926 simplex iterations) in 0.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.978900000000e+04, best bound 3.978800000000e+04, gap 0.0025%