Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:50:52 2013 Optimize a model with 640 rows, 24700 columns and 248380 nonzeros Presolve removed 20 rows and 500 columns Presolve time: 0.49s Presolved: 620 rows, 24200 columns, 228380 nonzeros Variable types: 24020 continuous, 180 integer (180 binary) Root relaxation: objective 3.839329e+04, 607 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38393.2919 0 14 - 38393.2919 - - 0s 0 0 38393.8935 0 14 - 38393.8935 - - 0s 0 0 38393.9936 0 13 - 38393.9936 - - 0s 0 0 38394.2263 0 14 - 38394.2263 - - 1s 0 0 38394.3657 0 14 - 38394.3657 - - 1s 0 0 38394.4220 0 14 - 38394.4220 - - 1s 0 0 38394.4374 0 16 - 38394.4374 - - 1s 0 0 38394.4924 0 16 - 38394.4924 - - 1s 0 0 38394.5181 0 14 - 38394.5181 - - 1s 0 0 38394.5422 0 16 - 38394.5422 - - 1s 0 0 38394.5563 0 23 - 38394.5563 - - 1s 0 0 38394.5563 0 23 - 38394.5563 - - 2s H 0 0 40477.921272 38394.5563 5.15% - 3s 0 2 38395.5421 0 23 40477.9213 38395.5421 5.14% - 4s * 44 24 39 38676.587628 38542.5241 0.35% 10.3 4s H 54 2 38640.304016 38634.5237 0.01% 9.3 4s 59 3 38639.4859 19 5 38640.3040 38634.5237 0.01% 8.8 5s * 70 4 29 38639.916656 38634.5237 0.01% 8.1 5s * 105 7 43 38634.964468 38634.6905 0.00% 6.4 5s Cutting planes: Flow cover: 11 Explored 106 nodes (1656 simplex iterations) in 5.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.863496446840e+04, best bound 3.863469048177e+04, gap 0.0007%