Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:16:19 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 6.112259e+04, 6918 iterations, 4.58 seconds Total elapsed time = 5.02s Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61122.5926 0 54 - 61122.5926 - - 5s H 0 0 97005.000000 61122.5926 37.0% - 8s 0 0 76650.0342 0 20 97005.0000 76650.0342 21.0% - 17s H 0 0 91826.000000 76650.0342 16.5% - 17s 0 0 82680.8893 0 8 91826.0000 82680.8893 10.0% - 20s H 0 0 88175.000000 82680.8893 6.23% - 20s H 0 0 84135.000000 82680.8893 1.73% - 20s 0 0 82875.7161 0 7 84135.0000 82875.7161 1.50% - 20s 0 0 82916.9999 0 5 84135.0000 82916.9999 1.45% - 21s 0 2 82918.5345 0 5 84135.0000 82918.5345 1.45% - 22s H 15 14 83652.563934 83060.1992 0.71% 227 24s 18 18 83442.4279 14 3 83652.5639 83060.1992 0.71% 221 25s H 21 19 83548.148148 83060.1992 0.58% 191 25s * 25 15 20 83503.000000 83060.1992 0.53% 185 25s H 30 10 83326.878788 83094.2056 0.28% 197 26s * 32 12 8 83304.000000 83094.2056 0.25% 198 26s * 75 13 21 83277.000000 83121.3907 0.19% 145 28s Cutting planes: Implied bound: 69 Explored 90 nodes (27249 simplex iterations) in 29.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.327700000000e+04, best bound 8.326878125000e+04, gap 0.0099%