Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:16:44 2013 Optimize a model with 600 rows, 14440 columns and 96340 nonzeros Presolve removed 20 rows and 2260 columns Presolve time: 0.20s Presolved: 580 rows, 12180 columns, 88340 nonzeros Variable types: 12020 continuous, 160 integer (160 binary) Root relaxation: objective 3.839329e+04, 502 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38393.2919 0 10 - 38393.2919 - - 0s 0 0 38394.7977 0 10 - 38394.7977 - - 0s 0 0 38394.9860 0 10 - 38394.9860 - - 0s 0 0 38395.0991 0 10 - 38395.0991 - - 0s 0 0 38395.1249 0 9 - 38395.1249 - - 0s 0 0 38395.6727 0 10 - 38395.6727 - - 0s 0 0 38395.9887 0 10 - 38395.9887 - - 0s 0 0 38396.2297 0 15 - 38396.2297 - - 0s 0 0 38396.2345 0 15 - 38396.2345 - - 0s 0 0 38396.2559 0 15 - 38396.2559 - - 1s 0 0 38396.2622 0 15 - 38396.2622 - - 1s 0 0 38396.2622 0 15 - 38396.2622 - - 1s H 0 0 41641.480422 38396.2622 7.79% - 2s 0 2 38396.3927 0 15 41641.4804 38396.3927 7.79% - 2s H 27 14 38654.373014 38513.4243 0.36% 13.0 2s * 36 21 33 38653.737751 38513.4243 0.36% 11.0 2s * 37 20 33 38653.721027 38513.4243 0.36% 10.7 2s H 54 9 38634.720802 38630.8464 0.01% 8.6 2s Cutting planes: Flow cover: 8 Explored 59 nodes (1555 simplex iterations) in 2.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.863472080165e+04, best bound 3.863121439469e+04, gap 0.0091%