Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:44:21 2013 Optimize a model with 680 rows, 45200 columns and 528420 nonzeros Presolve removed 20 rows and 980 columns Presolve time: 1.90s Presolved: 660 rows, 44220 columns, 488420 nonzeros Variable types: 44020 continuous, 200 integer (200 binary) Root relaxation: objective 4.013975e+04, 538 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40139.7487 0 16 - 40139.7487 - - 2s 0 0 40139.7487 0 16 - 40139.7487 - - 2s 0 0 40139.7487 0 16 - 40139.7487 - - 3s 0 0 40139.7597 0 16 - 40139.7597 - - 3s 0 0 40139.7597 0 16 - 40139.7597 - - 4s 0 0 40139.7597 0 16 - 40139.7597 - - 4s 0 2 40140.6913 0 16 - 40140.6913 - - 11s * 403 363 171 40790.303715 40142.8767 1.59% 3.2 14s * 406 364 173 40761.259945 40142.8767 1.52% 3.2 14s H 431 60 40197.172756 40143.1190 0.13% 3.2 14s * 453 64 19 40197.169531 40143.1190 0.13% 3.2 14s 485 68 40195.3431 11 7 40197.1695 40143.3597 0.13% 3.3 15s * 494 65 20 40196.833824 40143.3597 0.13% 3.3 15s * 526 54 22 40196.143314 40144.1232 0.13% 3.3 15s * 527 52 22 40195.994785 40144.1232 0.13% 3.3 15s * 531 53 21 40195.551320 40144.1232 0.13% 3.3 15s * 577 60 31 40195.527519 40145.2045 0.13% 3.3 15s * 859 16 22 40195.226871 40191.4506 0.01% 3.5 18s Cutting planes: Flow cover: 6 Explored 860 nodes (4544 simplex iterations) in 18.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.019522687141e+04, best bound 4.019145062122e+04, gap 0.0094%