Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:15 2013 Optimize a model with 440 rows, 4340 columns and 9520 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.01s Presolved: 420 rows, 4320 columns, 9300 nonzeros Variable types: 4240 continuous, 80 integer (80 binary) Root relaxation: objective 4.370285e+04, 510 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43702.8549 0 6 - 43702.8549 - - 0s 0 0 43723.5780 0 3 - 43723.5780 - - 0s 0 0 43723.6619 0 3 - 43723.6619 - - 0s 0 0 43724.5939 0 3 - 43724.5939 - - 0s 0 0 43724.7642 0 7 - 43724.7642 - - 0s 0 0 43725.2427 0 7 - 43725.2427 - - 0s 0 0 43725.5107 0 3 - 43725.5107 - - 0s 0 0 43725.5107 0 4 - 43725.5107 - - 0s 0 0 43725.6713 0 3 - 43725.6713 - - 0s 0 0 43725.7283 0 3 - 43725.7283 - - 0s 0 0 43725.7283 0 3 - 43725.7283 - - 0s H 0 0 44529.286095 43725.7283 1.80% - 0s 0 2 43725.9325 0 3 44529.2861 43725.9325 1.80% - 0s * 10 9 8 44059.523259 43789.9883 0.61% 19.0 0s * 13 4 6 44041.268606 43789.9883 0.57% 15.2 0s * 22 9 7 44038.692081 43852.8700 0.42% 16.9 0s H 27 1 43900.453435 43878.1632 0.05% 14.3 0s Cutting planes: Flow cover: 8 Explored 34 nodes (1152 simplex iterations) in 0.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.390045343473e+04, best bound 4.389694531587e+04, gap 0.0080%