Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:39:29 2013 Optimize a model with 320 rows, 11350 columns and 122190 nonzeros Presolve removed 10 rows and 250 columns Presolve time: 0.25s Presolved: 310 rows, 11100 columns, 112190 nonzeros Variable types: 11010 continuous, 90 integer (90 binary) Root relaxation: objective 1.997658e+04, 173 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19976.5790 0 14 - 19976.5790 - - 0s 0 0 19976.8125 0 14 - 19976.8125 - - 0s 0 0 20149.8316 0 12 - 20149.8316 - - 0s 0 0 20149.8316 0 12 - 20149.8316 - - 0s 0 2 20149.8376 0 12 - 20149.8376 - - 1s * 22 17 21 20235.187133 20149.8376 0.42% 9.7 1s * 37 13 12 20162.132470 20150.0795 0.06% 6.8 1s * 56 17 15 20161.091765 20150.1279 0.05% 5.2 1s * 69 21 13 20160.416589 20150.1666 0.05% 4.7 1s * 134 14 16 20158.536011 20157.1264 0.01% 3.4 1s Cutting planes: Flow cover: 2 Explored 135 nodes (1057 simplex iterations) in 1.91 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.015853601105e+04, best bound 2.015712636672e+04, gap 0.0070%