Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:33:20 2013 Optimize a model with 36660 rows, 36060 columns and 144060 nonzeros Presolve removed 2043 rows and 0 columns Presolve time: 0.21s Presolved: 34617 rows, 36060 columns, 139974 nonzeros Variable types: 36000 continuous, 60 integer (60 binary) Root relaxation: objective 6.560735e+04, 7651 iterations, 1.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65607.3462 0 6 - 65607.3462 - - 1s H 0 0 67886.000000 65607.3462 3.36% - 1s 0 0 65611.5275 0 8 67886.0000 65611.5275 3.35% - 1s H 0 0 65978.000000 65611.5275 0.56% - 1s 0 0 65612.0116 0 7 65978.0000 65612.0116 0.55% - 2s 0 0 65612.1167 0 7 65978.0000 65612.1167 0.55% - 2s 0 0 65612.1167 0 7 65978.0000 65612.1167 0.55% - 2s 0 0 65612.1167 0 7 65978.0000 65612.1167 0.55% - 2s 0 0 65612.1167 0 7 65978.0000 65612.1167 0.55% - 2s 0 0 65612.1167 0 7 65978.0000 65612.1167 0.55% - 2s 0 0 65621.8991 0 5 65978.0000 65621.8991 0.54% - 3s 0 0 65621.8991 0 5 65978.0000 65621.8991 0.54% - 4s 0 0 65623.3658 0 6 65978.0000 65623.3658 0.54% - 4s 0 0 65623.5520 0 6 65978.0000 65623.5520 0.54% - 4s H 0 0 65870.000000 65623.5520 0.37% - 5s 0 2 65626.8434 0 6 65870.0000 65626.8434 0.37% - 5s * 8 5 7 65845.000000 65744.5526 0.15% 104 5s Cutting planes: Gomory: 3 Flow cover: 7 Explored 17 nodes (12600 simplex iterations) in 6.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.584500000000e+04, best bound 6.584500000000e+04, gap 0.0%