Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:52:40 2013 Optimize a model with 715 rows, 42315 columns and 84565 nonzeros Presolve time: 0.06s Presolved: 715 rows, 42315 columns, 84565 nonzeros Variable types: 42250 continuous, 65 integer (65 binary) Root relaxation: objective 7.407405e+04, 1642 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 74074.0506 0 9 - 74074.0506 - - 0s H 0 0 80181.000000 74074.0506 7.62% - 0s H 0 0 75559.000000 74074.0506 1.97% - 0s 0 0 74455.1141 0 4 75559.0000 74455.1141 1.46% - 0s 0 0 74478.0312 0 3 75559.0000 74478.0312 1.43% - 0s 0 0 74482.2030 0 4 75559.0000 74482.2030 1.43% - 0s 0 0 74485.9941 0 4 75559.0000 74485.9941 1.42% - 0s 0 0 74487.4418 0 4 75559.0000 74487.4418 1.42% - 0s 0 0 74487.7303 0 2 75559.0000 74487.7303 1.42% - 0s 0 0 74487.7303 0 2 75559.0000 74487.7303 1.42% - 0s 0 0 74487.7303 0 2 75559.0000 74487.7303 1.42% - 0s H 0 0 74754.000000 74487.7303 0.36% - 0s 0 0 74487.7303 0 9 74754.0000 74487.7303 0.36% - 1s 0 0 74487.7303 0 4 74754.0000 74487.7303 0.36% - 1s 0 0 74487.7303 0 3 74754.0000 74487.7303 0.36% - 1s 0 0 74487.7303 0 4 74754.0000 74487.7303 0.36% - 1s 0 0 74487.7303 0 5 74754.0000 74487.7303 0.36% - 1s 0 0 74487.7303 0 3 74754.0000 74487.7303 0.36% - 1s 0 0 74487.7303 0 2 74754.0000 74487.7303 0.36% - 1s 0 2 74528.5893 0 2 74754.0000 74528.5893 0.30% - 1s * 9 5 8 74729.000000 74712.0754 0.02% 58.2 1s Cutting planes: Implied bound: 83 Flow cover: 4 Explored 13 nodes (3876 simplex iterations) in 1.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.472900000000e+04, best bound 7.472232425743e+04, gap 0.0089%