Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:29:37 2013 Optimize a model with 1500 rows, 51100 columns and 270850 nonzeros Presolve removed 50 rows and 5650 columns Presolve time: 0.46s Presolved: 1450 rows, 45450 columns, 250850 nonzeros Variable types: 45050 continuous, 400 integer (400 binary) Root relaxation: objective 1.959342e+05, 2986 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 195934.242 0 15 - 195934.242 - - 0s 0 0 195943.554 0 15 - 195943.554 - - 0s 0 0 195944.205 0 15 - 195944.205 - - 1s 0 0 195944.333 0 15 - 195944.333 - - 1s 0 0 195944.363 0 15 - 195944.363 - - 1s 0 0 195944.363 0 15 - 195944.363 - - 1s 0 0 195944.363 0 15 - 195944.363 - - 1s 0 0 195945.191 0 15 - 195945.191 - - 1s 0 0 195945.191 0 15 - 195945.191 - - 2s 0 0 195945.191 0 15 - 195945.191 - - 2s 0 2 195949.152 0 15 - 195949.152 - - 5s * 203 164 183 199519.29522 195969.236 1.78% 11.0 9s 205 161 195972.829 2 14 199519.295 195972.829 1.78% 11.2 10s H 232 30 196568.54214 195994.434 0.29% 12.7 10s H 259 38 196567.05378 196180.056 0.20% 13.4 11s * 277 45 28 196566.55727 196180.056 0.20% 13.0 11s * 365 31 28 196564.86070 196530.425 0.02% 14.8 12s Cutting planes: Flow cover: 6 Explored 401 nodes (10077 simplex iterations) in 12.61 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.965648606974e+05, best bound 1.965461784953e+05, gap 0.0095%