Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:59:14 2013 Optimize a model with 39773 rows, 3844 columns and 121086 nonzeros Presolve removed 3619 rows and 1955 columns Presolve time: 0.31s Presolved: 36154 rows, 1889 columns, 110053 nonzeros Variable types: 27 continuous, 1862 integer (1862 binary) Found heuristic solution: objective 86452.000000 Root relaxation: objective 6.751335e+04, 11287 iterations, 0.85 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67513.3500 0 12 86452.0000 67513.3500 21.9% - 1s H 0 0 67543.000000 67513.3500 0.04% - 1s H 0 0 67532.000000 67513.3500 0.03% - 1s 0 0 67514.1070 0 31 67532.0000 67514.1070 0.03% - 1s 0 0 67514.1070 0 11 67532.0000 67514.1070 0.03% - 1s H 0 0 67529.000000 67514.1070 0.02% - 1s 0 0 67514.1233 0 33 67529.0000 67514.1233 0.02% - 1s 0 2 67514.2258 0 32 67529.0000 67514.2258 0.02% - 2s H 1 2 67524.000000 67514.2258 0.01% 5.0 2s H 10 7 67521.000000 67514.7390 0.01% 0.5 2s Cutting planes: Gomory: 5 MIR: 10 Zero half: 2 Explored 10 nodes (14897 simplex iterations) in 2.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.752100000000e+04, best bound 6.751500000000e+04, gap 0.0089%