Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:27:58 2013 Optimize a model with 638 rows, 33698 columns and 67338 nonzeros Presolve time: 0.05s Presolved: 638 rows, 33698 columns, 67338 nonzeros Variable types: 33640 continuous, 58 integer (58 binary) Root relaxation: objective 5.078434e+04, 1012 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50784.3369 0 12 - 50784.3369 - - 0s H 0 0 53144.000000 50784.3369 4.44% - 0s 0 0 51231.6829 0 8 53144.0000 51231.6829 3.60% - 0s H 0 0 51495.000000 51231.6829 0.51% - 0s 0 0 51296.7900 0 8 51495.0000 51296.7900 0.38% - 0s 0 0 51296.7900 0 12 51495.0000 51296.7900 0.38% - 0s 0 0 51296.7900 0 8 51495.0000 51296.7900 0.38% - 0s 0 0 51297.7309 0 8 51495.0000 51297.7309 0.38% - 0s 0 0 51307.0031 0 9 51495.0000 51307.0031 0.37% - 0s 0 0 51315.3391 0 5 51495.0000 51315.3391 0.35% - 0s 0 0 51319.0190 0 6 51495.0000 51319.0190 0.34% - 0s 0 0 51320.1527 0 5 51495.0000 51320.1527 0.34% - 0s 0 0 51320.3684 0 5 51495.0000 51320.3684 0.34% - 0s 0 0 51320.4054 0 4 51495.0000 51320.4054 0.34% - 0s 0 0 51320.5550 0 7 51495.0000 51320.5550 0.34% - 0s 0 0 51320.6227 0 4 51495.0000 51320.6227 0.34% - 0s H 0 0 51425.000000 51320.6227 0.20% - 0s 0 2 51322.2440 0 4 51425.0000 51322.2440 0.20% - 0s * 5 3 5 51420.000000 51384.4439 0.07% 43.6 1s Cutting planes: Implied bound: 151 Flow cover: 19 Explored 9 nodes (2750 simplex iterations) in 1.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.142000000000e+04, best bound 5.142000000000e+04, gap 0.0%