Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:26:06 2013 Optimize a model with 71484 rows, 70644 columns and 282324 nonzeros Presolve removed 2221 rows and 0 columns Presolve time: 0.47s Presolved: 69263 rows, 70644 columns, 277882 nonzeros Variable types: 70560 continuous, 84 integer (84 binary) Root relaxation: objective 9.037209e+04, 12482 iterations, 3.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 90372.0928 0 3 - 90372.0928 - - 3s H 0 0 92195.000000 90372.0928 1.98% - 4s 0 0 90379.0576 0 6 92195.0000 90379.0576 1.97% - 4s 0 0 90379.1865 0 6 92195.0000 90379.1865 1.97% - 5s 0 0 90379.4521 0 6 92195.0000 90379.4521 1.97% - 5s 0 2 90382.4986 0 6 92195.0000 90382.4986 1.97% - 8s H 5 5 90835.989011 90692.6535 0.16% 207 9s H 6 4 90807.923077 90692.6535 0.13% 197 9s H 7 4 90797.542105 90692.6535 0.12% 172 9s * 8 3 7 90780.000000 90692.6535 0.10% 162 10s Cutting planes: Gomory: 1 Flow cover: 5 Explored 13 nodes (14424 simplex iterations) in 10.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.078000000000e+04, best bound 9.078000000000e+04, gap 0.0%