Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:47:49 2013 Optimize a model with 4280 rows, 8040 columns and 24020 nonzeros Presolve removed 60 rows and 40 columns Presolve time: 0.17s Presolved: 4220 rows, 8000 columns, 19960 nonzeros Variable types: 6020 continuous, 1980 integer (1980 binary) Root relaxation: objective 3.573401e+04, 1619 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35734.0139 0 3 - 35734.0139 - - 0s 0 0 35838.5374 0 5 - 35838.5374 - - 0s 0 0 35839.6542 0 5 - 35839.6542 - - 0s 0 0 35851.2780 0 5 - 35851.2780 - - 0s 0 0 35851.2780 0 5 - 35851.2780 - - 0s 0 0 35851.3652 0 6 - 35851.3652 - - 0s 0 2 35854.2398 0 6 - 35854.2398 - - 0s H 104 74 36198.189007 35968.4877 0.63% 10.5 1s H 104 74 36198.128401 35968.4877 0.63% 10.5 1s H 181 125 36184.943558 35991.7023 0.53% 12.0 1s * 184 126 83 36182.983558 35991.7023 0.53% 12.6 2s H 366 221 36175.744452 36081.1376 0.26% 12.9 2s * 373 219 64 36174.621982 36081.1376 0.26% 14.1 2s * 400 227 63 36174.061198 36084.5072 0.25% 13.8 2s * 494 251 62 36173.801501 36090.9742 0.23% 14.5 2s H 495 250 36173.782956 36090.9742 0.23% 14.4 2s * 497 248 63 36173.469392 36090.9742 0.23% 14.5 2s 718 338 36126.7719 17 5 36173.4694 36096.1982 0.21% 18.6 5s Cutting planes: Gomory: 2 Flow cover: 15 Explored 2007 nodes (41033 simplex iterations) in 8.53 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.617346939151e+04, best bound 3.616986583374e+04, gap 0.0100%