Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:59:50 2013 Optimize a model with 1700 rows, 128000 columns and 1351050 nonzeros Presolve removed 50 rows and 2450 columns Presolve time: 3.48s Presolved: 1650 rows, 125550 columns, 1251050 nonzeros Variable types: 125050 continuous, 500 integer (500 binary) Root relaxation: objective 1.749223e+05, 2373 iterations, 0.27 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 174922.321 0 16 - 174922.321 - - 4s 0 0 174923.194 0 16 - 174923.194 - - 5s 0 0 174923.559 0 16 - 174923.559 - - 6s 0 0 174923.559 0 16 - 174923.559 - - 6s 0 0 174923.559 0 16 - 174923.559 - - 7s 0 0 174923.559 0 16 - 174923.559 - - 8s 0 0 174923.559 0 16 - 174923.559 - - 9s 0 0 174923.559 0 16 - 174923.559 - - 9s 0 0 174923.559 0 16 - 174923.559 - - 11s 0 2 174929.140 0 16 - 174929.140 - - 25s 76 78 175778.302 76 8 - 174952.207 - 14.1 30s 161 159 181612.333 157 8 - 174952.207 - 10.8 35s 240 231 181711.060 219 8 - 174952.207 - 8.7 40s * 255 208 234 181711.23032 174952.207 3.72% 8.3 40s H 285 164 176879.08855 174958.766 1.09% 9.1 41s 381 241 176784.582 63 8 176879.089 175059.838 1.03% 9.4 45s * 485 338 165 176833.44345 175059.838 1.00% 7.9 46s 601 443 175885.218 11 16 176833.443 175063.667 1.00% 7.4 55s 607 447 176820.300 146 16 176833.443 175063.667 1.00% 7.3 60s 614 452 175400.017 15 8 176833.443 175217.711 0.91% 16.0 65s H 637 428 176226.95505 175655.800 0.32% 16.1 69s 641 428 176210.777 32 8 176226.955 175655.800 0.32% 16.0 70s * 668 394 52 176211.95151 175655.800 0.32% 15.7 73s Cutting planes: Flow cover: 7 Explored 703 nodes (17091 simplex iterations) in 74.81 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.762119515142e+05, best bound 1.762104714471e+05, gap 0.0008%