Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:57:05 2013 Optimize a model with 30913 rows, 3249 columns and 94221 nonzeros Presolve removed 2443 rows and 1642 columns Presolve time: 0.19s Presolved: 28470 rows, 1607 columns, 86814 nonzeros Variable types: 26 continuous, 1581 integer (1581 binary) Found heuristic solution: objective 82187.000000 Root relaxation: objective 6.313036e+04, 10164 iterations, 0.64 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 63130.3569 0 11 82187.0000 63130.3569 23.2% - 0s H 0 0 63152.000000 63130.3569 0.03% - 0s H 0 0 63145.000000 63130.3569 0.02% - 0s H 0 0 63139.000000 63130.3569 0.01% - 0s 0 0 63131.4308 0 13 63139.0000 63131.4308 0.01% - 1s 0 0 63131.4308 0 9 63139.0000 63131.4308 0.01% - 1s 0 0 63131.6605 0 11 63139.0000 63131.6605 0.01% - 1s 0 2 63131.7292 0 11 63139.0000 63131.7292 0.01% - 1s H 7 6 63138.000000 63132.5291 0.01% 0.0 1s Cutting planes: Gomory: 3 Cover: 1 MIR: 4 Zero half: 1 Explored 7 nodes (10409 simplex iterations) in 1.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.313800000000e+04, best bound 6.313300000000e+04, gap 0.0079%