Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:16:50 2013 Optimize a model with 48438 rows, 47748 columns and 190578 nonzeros Presolve removed 69 rows and 0 columns Presolve time: 0.21s Presolved: 48369 rows, 47748 columns, 190509 nonzeros Variable types: 47679 continuous, 69 integer (69 binary) Root relaxation: objective 6.204602e+04, 6477 iterations, 4.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62046.0213 0 56 - 62046.0213 - - 4s H 0 0 110984.00000 62046.0213 44.1% - 8s 0 0 79579.5523 0 16 110984.000 79579.5523 28.3% - 16s H 0 0 96667.021023 79579.5523 17.7% - 16s H 0 0 89777.000000 79579.5523 11.4% - 16s H 0 0 89316.000000 79579.5523 10.9% - 16s 0 0 83721.0977 0 4 89316.0000 83721.0977 6.26% - 17s H 0 0 89078.461606 83721.0977 6.01% - 17s H 0 0 85724.000000 83721.0977 2.34% - 17s 0 0 84044.9029 0 3 85724.0000 84044.9029 1.96% - 18s 0 2 84057.8846 0 3 85724.0000 84057.8846 1.94% - 19s H 5 4 84440.085714 84160.8773 0.33% 128 19s 7 7 84254.6835 5 2 84440.0857 84160.8773 0.33% 135 20s * 37 13 7 84419.000000 84208.2198 0.25% 152 22s H 49 1 84307.366337 84278.8911 0.03% 138 23s H 50 0 84295.142857 84278.9714 0.02% 138 23s * 51 0 8 84282.000000 84282.0000 0.0% 136 23s Cutting planes: Implied bound: 67 Explored 52 nodes (21577 simplex iterations) in 23.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.428200000000e+04, best bound 8.428200000000e+04, gap 0.0%