Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:43:04 2013 Optimize a model with 680 rows, 45200 columns and 528420 nonzeros Presolve removed 20 rows and 980 columns Presolve time: 1.61s Presolved: 660 rows, 44220 columns, 488420 nonzeros Variable types: 44020 continuous, 200 integer (200 binary) Root relaxation: objective 3.573401e+04, 528 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35734.0139 0 24 - 35734.0139 - - 2s 0 0 35734.2814 0 24 - 35734.2814 - - 2s 0 0 35734.3231 0 24 - 35734.3231 - - 3s 0 0 35734.4085 0 24 - 35734.4085 - - 3s 0 0 35734.4180 0 24 - 35734.4180 - - 3s 0 0 35734.4547 0 24 - 35734.4547 - - 3s 0 0 35734.4553 0 24 - 35734.4553 - - 4s 0 0 35734.4613 0 24 - 35734.4613 - - 4s 0 0 35734.4613 0 24 - 35734.4613 - - 5s 0 0 35734.4695 0 24 - 35734.4695 - - 5s 0 0 35734.4695 0 24 - 35734.4695 - - 5s 0 0 35734.4695 0 24 - 35734.4695 - - 6s H 0 0 37412.030341 35734.4695 4.48% - 6s H 0 0 36200.548764 35734.4695 1.29% - 8s 0 2 35734.4695 0 24 36200.5488 35734.4695 1.29% - 8s * 35 20 19 36180.907417 36170.7724 0.03% 17.5 9s * 39 19 22 36180.886743 36170.7724 0.03% 15.9 9s * 70 21 29 36179.606585 36173.3886 0.02% 10.7 9s * 88 13 22 36176.403235 36173.4170 0.01% 9.4 9s Cutting planes: Flow cover: 11 Explored 89 nodes (3139 simplex iterations) in 9.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.617640323458e+04, best bound 3.617341696292e+04, gap 0.0083%