Gurobi 5.0.1 (linux64) logging started Sat Dec 8 03:30:37 2012 Optimize a model with 555 rows, 540 columns and 1777 nonzeros Presolve removed 52 rows and 31 columns Presolve time: 0.01s Presolved: 503 rows, 509 columns, 1689 nonzeros Variable types: 339 continuous, 170 integer (170 binary) Root relaxation: objective 5.222160e+04, 249 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 52221.6007 0 77 - 52221.6007 - - 0s H 0 0 76890.000000 52221.6007 32.1% - 0s 0 0 61914.5787 0 26 76890.0000 61914.5787 19.5% - 0s 0 0 62149.8997 0 34 76890.0000 62149.8997 19.2% - 0s 0 0 62207.9797 0 21 76890.0000 62207.9797 19.1% - 0s 0 0 62251.7143 0 21 76890.0000 62251.7143 19.0% - 0s 0 0 62255.7251 0 19 76890.0000 62255.7251 19.0% - 0s 0 0 62264.7428 0 20 76890.0000 62264.7428 19.0% - 0s 0 2 62265.1679 0 20 76890.0000 62265.1679 19.0% - 0s H 27 27 63658.000000 62266.4585 2.19% 3.4 0s * 51 42 45 63410.000000 62266.4585 1.80% 3.2 0s * 156 94 55 63089.000000 62281.4991 1.28% 3.7 0s * 157 87 56 63046.000000 62281.4991 1.21% 3.7 0s H 202 107 62941.000000 62314.5357 1.00% 3.9 0s * 203 101 37 62919.000000 62314.5357 0.96% 3.9 0s H 600 277 62819.000000 62424.6489 0.63% 4.8 0s H 1469 270 62776.000000 62553.4389 0.35% 4.8 0s * 1484 257 30 62757.000000 62553.4389 0.32% 4.8 0s * 1540 185 31 62710.000000 62564.2134 0.23% 4.9 0s * 1576 131 28 62678.000000 62574.4920 0.17% 4.8 0s * 1809 37 28 62674.000000 62652.4715 0.03% 4.6 0s Cutting planes: Gomory: 9 Cover: 5 Flow cover: 48 Flow path: 22 Explored 1842 nodes (8839 simplex iterations) in 0.70 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.267400000000e+04, best bound 6.266786186865e+04, gap 0.0098%