Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:15:57 2013 Optimize a model with 480 rows, 4640 columns and 9620 nonzeros Presolve removed 40 rows and 60 columns Presolve time: 0.02s Presolved: 440 rows, 4580 columns, 9160 nonzeros Variable types: 4400 continuous, 180 integer (180 binary) Root relaxation: objective 4.642213e+04, 534 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46422.1265 0 3 - 46422.1265 - - 0s 0 0 46439.5557 0 2 - 46439.5557 - - 0s 0 0 46440.0930 0 3 - 46440.0930 - - 0s 0 0 46442.6387 0 2 - 46442.6387 - - 0s 0 0 46442.6387 0 2 - 46442.6387 - - 0s 0 0 46442.6387 0 2 - 46442.6387 - - 0s 0 0 46442.6387 0 2 - 46442.6387 - - 0s 0 0 46442.6387 0 2 - 46442.6387 - - 0s H 0 0 47019.374336 46442.6387 1.23% - 0s 0 2 46451.4758 0 2 47019.3743 46451.4758 1.21% - 0s * 12 9 7 46994.463488 46533.5550 0.98% 32.0 0s * 16 7 8 46989.286113 46533.5550 0.97% 27.6 0s H 27 11 46824.879384 46562.1337 0.56% 25.3 0s * 28 10 7 46799.107742 46562.1337 0.51% 25.2 0s * 32 6 7 46797.700049 46562.1337 0.50% 23.2 0s * 63 4 6 46756.955185 46702.6928 0.12% 21.3 0s * 69 0 7 46742.720716 46742.7207 0.0% 20.0 0s Cutting planes: Flow cover: 12 Explored 70 nodes (2094 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.674272071620e+04, best bound 4.674272071620e+04, gap 0.0%