Gurobi 5.0.1 (linux64) logging started Wed Apr 24 12:19:07 2013 Optimize a model with 1760 rows, 256160 columns and 512160 nonzeros Presolve time: 0.67s Presolved: 1760 rows, 256160 columns, 512160 nonzeros Variable types: 256000 continuous, 160 integer (160 binary) Root relaxation: objective 2.853536e+05, 7940 iterations, 0.77 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 285353.610 0 7 - 285353.610 - - 1s H 0 0 306127.00000 285353.610 6.79% - 2s H 0 0 286471.00000 285353.610 0.39% - 3s 0 0 285524.837 0 3 286471.000 285524.837 0.33% - 3s 0 0 285524.837 0 7 286471.000 285524.837 0.33% - 4s 0 0 285524.837 0 3 286471.000 285524.837 0.33% - 5s 0 0 285528.134 0 3 286471.000 285528.134 0.33% - 5s 0 0 285528.134 0 3 286471.000 285528.134 0.33% - 6s 0 0 285528.134 0 3 286471.000 285528.134 0.33% - 6s 0 0 285528.134 0 3 286471.000 285528.134 0.33% - 6s 0 0 285528.134 0 3 286471.000 285528.134 0.33% - 6s H 0 0 286363.00000 285528.134 0.29% - 7s 0 2 285529.458 0 3 286363.000 285529.458 0.29% - 7s H 16 10 286040.00000 285595.199 0.16% 52.1 9s H 18 9 285843.00000 285595.199 0.09% 47.2 9s * 20 7 20 285813.00000 285595.199 0.08% 43.0 9s 32 5 285754.246 11 1 285813.000 285672.699 0.05% 60.4 10s Cutting planes: Implied bound: 87 Flow cover: 6 Explored 37 nodes (16273 simplex iterations) in 10.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.858130000000e+05, best bound 2.857870000000e+05, gap 0.0091%