Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:28:18 2013 Optimize a model with 51262 rows, 50552 columns and 201782 nonzeros Presolve removed 71 rows and 0 columns Presolve time: 0.23s Presolved: 51191 rows, 50552 columns, 201711 nonzeros Variable types: 50481 continuous, 71 integer (71 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 7017 6.5140718e+04 1.389361e+04 0.000000e+00 5s 7817 6.5245171e+04 0.000000e+00 0.000000e+00 6s Root relaxation: objective 6.524517e+04, 7817 iterations, 6.35 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65245.1715 0 58 - 65245.1715 - - 6s H 0 0 112243.00000 65245.1715 41.9% - 10s 0 0 83350.8645 0 16 112243.000 83350.8645 25.7% - 20s H 0 0 111442.44263 83350.8645 25.2% - 20s H 0 0 95956.000000 83350.8645 13.1% - 20s 0 0 86686.2908 0 6 95956.0000 86686.2908 9.66% - 22s H 0 0 93288.831855 86686.2908 7.08% - 22s H 0 0 92230.000000 86686.2908 6.01% - 22s H 0 0 86807.000000 86686.2908 0.14% - 22s 0 0 86686.4152 0 5 86807.0000 86686.4152 0.14% - 22s 0 0 86686.4152 0 45 86807.0000 86686.4152 0.14% - 27s 0 0 86686.4152 0 9 86807.0000 86686.4152 0.14% - 33s 0 0 86686.4152 0 6 86807.0000 86686.4152 0.14% - 34s 0 0 86686.4152 0 5 86807.0000 86686.4152 0.14% - 34s 0 2 86692.2635 0 5 86807.0000 86692.2635 0.13% - 36s Cutting planes: Gomory: 4 Implied bound: 51 Explored 35 nodes (27819 simplex iterations) in 38.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.680700000000e+04, best bound 8.679888501391e+04, gap 0.0093%