Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:08 2013 Optimize a model with 560 rows, 9300 columns and 48300 nonzeros Presolve removed 20 rows and 1140 columns Presolve time: 0.13s Presolved: 540 rows, 8160 columns, 44300 nonzeros Variable types: 8020 continuous, 140 integer (140 binary) Root relaxation: objective 3.860476e+04, 537 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38604.7615 0 12 - 38604.7615 - - 0s 0 0 38611.6943 0 12 - 38611.6943 - - 0s 0 0 38611.6943 0 12 - 38611.6943 - - 0s 0 0 38611.6943 0 12 - 38611.6943 - - 0s H 0 0 44917.381834 38611.6943 14.0% - 0s 0 2 38611.6943 0 12 44917.3818 38611.6943 14.0% - 1s * 16 12 16 38870.848722 38767.8330 0.27% 13.9 1s H 27 12 38870.276040 38772.0171 0.25% 10.8 1s * 30 10 10 38867.413780 38772.0171 0.25% 9.8 1s * 39 7 9 38861.063445 38830.2345 0.08% 9.1 1s Cutting planes: Flow cover: 4 Explored 46 nodes (1194 simplex iterations) in 1.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.886106344529e+04, best bound 3.885922462694e+04, gap 0.0047%