Gurobi 5.0.1 (linux64) logging started Sun Dec 23 02:17:46 2012 Optimize a model with 23102 rows, 22801 columns and 137300 nonzeros Presolve removed 10989 rows and 11637 columns Presolve time: 0.30s Presolved: 12113 rows, 11164 columns, 58666 nonzeros Variable types: 150 continuous, 11014 integer (11014 binary) Root relaxation: objective 8.008960e+02, 1233 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 800.89599 0 234 - 800.89599 - - 0s 0 0 819.77658 0 128 - 819.77658 - - 0s 0 0 823.00000 0 115 - 823.00000 - - 1s 0 0 823.33708 0 123 - 823.33708 - - 1s 0 0 823.33708 0 120 - 823.33708 - - 1s 0 0 823.33708 0 116 - 823.33708 - - 1s 0 0 823.33708 0 112 - 823.33708 - - 1s 0 0 823.33708 0 112 - 823.33708 - - 1s 0 0 823.33708 0 41 - 823.33708 - - 1s 0 0 823.33708 0 40 - 823.33708 - - 1s 0 0 824.65217 0 33 - 824.65217 - - 2s 0 0 825.57971 0 72 - 825.57971 - - 2s 0 0 827.00000 0 24 - 827.00000 - - 2s 0 0 827.00000 0 24 - 827.00000 - - 2s 0 2 827.00000 0 24 - 827.00000 - - 4s 16 18 832.57088 14 55 - 827.00000 - 16.8 5s * 305 55 23 835.0000000 829.04651 0.71% 13.2 8s H 447 48 834.0000000 832.00000 0.24% 12.2 9s Cutting planes: Learned: 17 Gomory: 4 Cover: 30 Implied bound: 1 Clique: 5 MIR: 39 GUB cover: 14 Zero half: 6 Mod-K: 1 Explored 539 nodes (9310 simplex iterations) in 9.73 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.340000000000e+02, best bound 8.340000000000e+02, gap 0.0%