Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:59:06 2013 Optimize a model with 39773 rows, 3844 columns and 121086 nonzeros Presolve removed 4242 rows and 1967 columns Presolve time: 0.30s Presolved: 35531 rows, 1877 columns, 108125 nonzeros Variable types: 26 continuous, 1851 integer (1851 binary) Found heuristic solution: objective 82320.000000 Root relaxation: objective 6.139189e+04, 10571 iterations, 0.77 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61391.8889 0 10 82320.0000 61391.8889 25.4% - 1s H 0 0 61415.000000 61391.8889 0.04% - 1s H 0 0 61408.000000 61391.8889 0.03% - 1s H 0 0 61401.000000 61391.8889 0.01% - 1s 0 0 61392.1364 0 22 61401.0000 61392.1364 0.01% - 1s 0 0 61392.1364 0 8 61401.0000 61392.1364 0.01% - 1s 0 0 61392.5004 0 24 61401.0000 61392.5004 0.01% - 1s 0 0 61392.5336 0 27 61401.0000 61392.5336 0.01% - 1s H 0 0 61395.000000 61392.5336 0.00% - 1s Cutting planes: Gomory: 1 MIR: 5 Zero half: 1 Explored 0 nodes (11938 simplex iterations) in 1.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.139500000000e+04, best bound 6.139300000000e+04, gap 0.0033%