Gurobi 5.0.1 (linux64) logging started Fri Jan 18 06:03:35 2013 Optimize a model with 25800 rows, 75150 columns and 225250 nonzeros Presolve removed 50 rows and 50 columns Presolve time: 0.88s Presolved: 25750 rows, 75100 columns, 200200 nonzeros Variable types: 50100 continuous, 25000 integer (25000 binary) Root relaxation: objective 2.198499e+05, 3994 iterations, 0.23 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 219849.939 0 4 - 219849.939 - - 1s 0 0 219896.345 0 3 - 219896.345 - - 2s 0 0 219912.451 0 2 - 219912.451 - - 2s 0 0 219914.265 0 2 - 219914.265 - - 2s 0 0 219922.529 0 2 - 219922.529 - - 2s 0 0 219922.529 0 2 - 219922.529 - - 3s 0 0 219923.448 0 2 - 219923.448 - - 3s 0 0 219923.448 0 2 - 219923.448 - - 3s 0 0 219925.167 0 2 - 219925.167 - - 4s 0 0 219925.167 0 2 - 219925.167 - - 4s 0 0 219925.167 0 2 - 219925.167 - - 4s 0 0 219925.167 0 2 - 219925.167 - - 5s 0 2 219925.167 0 2 - 219925.167 - - 9s 6 8 220558.631 3 4 - 220558.631 - 180 10s * 75 25 38 222622.35999 220950.526 0.75% 48.2 13s 94 24 221981.124 11 2 222622.360 221014.973 0.72% 51.1 15s * 105 19 17 221990.67135 221014.973 0.44% 46.3 15s * 164 6 32 221988.58808 221923.775 0.03% 39.1 18s Cutting planes: Gomory: 1 Implied bound: 72 Flow cover: 1 Explored 198 nodes (12633 simplex iterations) in 19.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.219885880773e+05, best bound 2.219885880773e+05, gap 0.0%