Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:17:58 2013 Optimize a model with 600 rows, 8220 columns and 48560 nonzeros Presolve removed 20 rows and 20 columns Presolve time: 0.06s Presolved: 580 rows, 8200 columns, 44540 nonzeros Variable types: 8040 continuous, 160 integer (160 binary) Root relaxation: objective 3.709539e+04, 467 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37095.3933 0 12 - 37095.3933 - - 0s 0 0 37096.4854 0 9 - 37096.4854 - - 0s 0 0 37096.4854 0 9 - 37096.4854 - - 0s 0 0 37096.5610 0 12 - 37096.5610 - - 0s 0 0 37096.6125 0 10 - 37096.6125 - - 0s 0 0 37096.6125 0 11 - 37096.6125 - - 0s 0 0 37096.6125 0 10 - 37096.6125 - - 0s 0 0 37096.6125 0 10 - 37096.6125 - - 0s 0 0 37096.6125 0 10 - 37096.6125 - - 0s 0 0 37096.6125 0 10 - 37096.6125 - - 0s 0 0 37096.6125 0 10 - 37096.6125 - - 0s 0 0 37096.6125 0 10 - 37096.6125 - - 0s H 0 0 41227.725013 37096.6125 10.0% - 0s 0 2 37118.6889 0 10 41227.7250 37118.6889 10.0% - 0s H 27 15 37297.530294 37236.1184 0.16% 5.3 1s * 56 10 11 37254.136767 37249.0211 0.01% 4.2 1s * 62 9 13 37253.494793 37249.0211 0.01% 4.0 1s Cutting planes: Flow cover: 10 Explored 67 nodes (1259 simplex iterations) in 1.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.725349479311e+04, best bound 3.725160783531e+04, gap 0.0051%