Gurobi 5.0.1 (linux64) logging started Wed Apr 24 04:26:19 2013 Optimize a model with 71484 rows, 70644 columns and 282324 nonzeros Presolve removed 7218 rows and 0 columns Presolve time: 0.46s Presolved: 64266 rows, 70644 columns, 267888 nonzeros Variable types: 70560 continuous, 84 integer (84 binary) Root relaxation: objective 9.898564e+04, 16578 iterations, 4.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 98985.6419 0 3 - 98985.6419 - - 4s H 0 0 101989.00000 98985.6419 2.94% - 4s 0 0 98989.9355 0 5 101989.000 98989.9355 2.94% - 5s H 0 0 99801.000000 98989.9355 0.81% - 6s 0 0 98989.9570 0 6 99801.0000 98989.9570 0.81% - 6s 0 0 98989.9727 0 5 99801.0000 98989.9727 0.81% - 7s 0 0 98989.9727 0 3 99801.0000 98989.9727 0.81% - 13s 0 0 98989.9727 0 5 99801.0000 98989.9727 0.81% - 13s 0 0 98989.9803 0 5 99801.0000 98989.9803 0.81% - 14s 0 2 98996.7032 0 5 99801.0000 98996.7032 0.81% - 16s * 9 7 8 99630.000000 99134.6661 0.50% 171 17s * 16 5 5 99423.000000 99175.8835 0.25% 163 18s * 19 5 6 99346.000000 99175.8835 0.17% 142 18s Cutting planes: Gomory: 2 Flow cover: 2 Explored 23 nodes (27733 simplex iterations) in 18.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.934600000000e+04, best bound 9.934600000000e+04, gap 0.0%