Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:19:44 2013 Optimize a model with 61776 rows, 60996 columns and 243516 nonzeros Presolve removed 78 rows and 0 columns Presolve time: 0.28s Presolved: 61698 rows, 60996 columns, 243438 nonzeros Variable types: 60918 continuous, 78 integer (78 binary) Root simplex log... Iteration Objective Primal Inf. Dual Inf. Time 7003 6.6517485e+04 3.672544e+03 0.000000e+00 5s 7552 6.6628043e+04 0.000000e+00 0.000000e+00 6s Root relaxation: objective 6.662804e+04, 7552 iterations, 6.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66628.0431 0 62 - 66628.0431 - - 6s H 0 0 109395.00000 66628.0431 39.1% - 11s 0 0 83197.4014 0 20 109395.000 83197.4014 23.9% - 23s H 0 0 109024.72799 83197.4014 23.7% - 23s H 0 0 99695.000000 83197.4014 16.5% - 23s 0 0 87122.5648 0 6 99695.0000 87122.5648 12.6% - 25s H 0 0 98601.000000 87122.5648 11.6% - 25s 0 0 88389.3876 0 4 98601.0000 88389.3876 10.4% - 27s H 0 0 95382.046393 88389.3876 7.33% - 27s H 0 0 93984.000000 88389.3876 5.95% - 27s H 0 0 91603.424485 88389.3876 3.51% - 28s H 0 0 88596.550000 88389.3876 0.23% - 28s H 0 0 88591.000000 88389.3876 0.23% - 29s 0 2 88414.1237 0 3 88591.0000 88414.1237 0.20% - 29s 2 4 88577.8571 2 1 88591.0000 88511.0865 0.09% 370 30s Cutting planes: Implied bound: 77 Explored 8 nodes (18125 simplex iterations) in 30.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.859100000000e+04, best bound 8.859100000000e+04, gap 0.0%