Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:55:29 2013 Optimize a model with 1600 rows, 76750 columns and 650950 nonzeros Presolve removed 50 rows and 1250 columns Presolve time: 1.10s Presolved: 1550 rows, 75500 columns, 600950 nonzeros Variable types: 75050 continuous, 450 integer (450 binary) Root relaxation: objective 1.959342e+05, 3300 iterations, 0.29 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 195934.242 0 21 - 195934.242 - - 1s 0 0 195937.965 0 21 - 195937.965 - - 2s 0 0 195938.230 0 21 - 195938.230 - - 2s 0 0 195938.331 0 21 - 195938.331 - - 2s 0 0 195938.331 0 21 - 195938.331 - - 3s 0 0 195938.331 0 21 - 195938.331 - - 3s 0 0 195938.331 0 21 - 195938.331 - - 4s 0 0 195938.331 0 21 - 195938.331 - - 4s 0 0 195938.331 0 21 - 195938.331 - - 4s 0 0 195938.331 0 21 - 195938.331 - - 5s 0 2 195939.901 0 21 - 195939.901 - - 12s 55 57 196562.214 49 7 - 195989.308 - 17.0 15s * 147 86 132 196580.42572 195989.308 0.30% 7.4 17s H 176 80 196576.12321 196106.604 0.24% 9.4 18s * 219 90 11 196570.65000 196226.348 0.18% 9.8 19s 230 87 196543.649 6 7 196570.650 196242.348 0.17% 11.7 20s H 284 73 196569.78569 196468.638 0.05% 12.1 21s H 338 68 196568.99108 196516.461 0.03% 11.1 21s * 351 64 45 196567.35063 196516.461 0.03% 10.9 22s Cutting planes: Flow cover: 8 Explored 450 nodes (10114 simplex iterations) in 23.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.965673506301e+05, best bound 1.965486397216e+05, gap 0.0095%