Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:40:18 2013 Optimize a model with 39122 rows, 38502 columns and 153822 nonzeros Presolve removed 1165 rows and 0 columns Presolve time: 0.22s Presolved: 37957 rows, 38502 columns, 151492 nonzeros Variable types: 38440 continuous, 62 integer (62 binary) Root relaxation: objective 7.028046e+04, 7823 iterations, 1.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70280.4583 0 4 - 70280.4583 - - 1s H 0 0 70633.000000 70280.4583 0.50% - 1s 0 0 70281.9748 0 4 70633.0000 70281.9748 0.50% - 1s 0 2 70282.0960 0 4 70633.0000 70282.0960 0.50% - 3s * 5 4 3 70471.000000 70357.4447 0.16% 288 3s H 9 1 70381.423729 70359.8286 0.03% 179 4s * 10 2 4 70360.000000 70360.0000 0.0% 164 4s Cutting planes: Gomory: 2 Flow cover: 1 Explored 11 nodes (9557 simplex iterations) in 4.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.036000000000e+04, best bound 7.036000000000e+04, gap 0.0%