Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:03 2013 Optimize a model with 440 rows, 4760 columns and 10980 nonzeros Presolve removed 20 rows and 260 columns Presolve time: 0.02s Presolved: 420 rows, 4500 columns, 10580 nonzeros Variable types: 4420 continuous, 80 integer (80 binary) Root relaxation: objective 4.642213e+04, 568 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46422.1265 0 6 - 46422.1265 - - 0s 0 0 46439.5557 0 4 - 46439.5557 - - 0s 0 0 46439.8956 0 6 - 46439.8956 - - 0s 0 0 46441.5339 0 4 - 46441.5339 - - 0s 0 0 46441.7399 0 6 - 46441.7399 - - 0s 0 0 46442.6387 0 4 - 46442.6387 - - 0s 0 0 46442.6387 0 4 - 46442.6387 - - 0s 0 0 46442.6387 0 4 - 46442.6387 - - 0s 0 0 46442.6387 0 4 - 46442.6387 - - 0s H 0 0 47019.374336 46442.6387 1.23% - 0s 0 2 46442.6387 0 4 47019.3743 46442.6387 1.23% - 0s * 7 5 6 46797.700049 46594.8010 0.43% 33.9 0s * 19 3 6 46742.720716 46674.7292 0.15% 26.5 0s Cutting planes: Flow cover: 6 Explored 22 nodes (1305 simplex iterations) in 0.35 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%