Gurobi 5.0.1 (linux64) logging started Thu Dec 20 12:35:52 2012 Optimize a model with 6722 rows, 6561 columns and 39323 nonzeros Presolve removed 4199 rows and 4687 columns Presolve time: 0.11s Presolved: 2523 rows, 1874 columns, 13906 nonzeros Variable types: 71 continuous, 1803 integer (1803 binary) Root relaxation: objective 7.294630e+02, 349 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 729.46298 0 75 - 729.46298 - - 0s 0 0 742.38710 0 20 - 742.38710 - - 0s 0 0 743.00000 0 19 - 743.00000 - - 0s 0 0 743.00000 0 16 - 743.00000 - - 0s H 0 0 748.0000000 743.00000 0.67% - 0s 0 0 743.00000 0 10 748.00000 743.00000 0.67% - 0s 0 0 743.00000 0 48 748.00000 743.00000 0.67% - 0s 0 0 743.00000 0 19 748.00000 743.00000 0.67% - 0s 0 0 743.00000 0 16 748.00000 743.00000 0.67% - 0s 0 0 744.00000 0 17 748.00000 744.00000 0.53% - 0s 0 0 744.00000 0 14 748.00000 744.00000 0.53% - 0s 0 0 744.00000 0 21 748.00000 744.00000 0.53% - 0s 0 0 744.00000 0 16 748.00000 744.00000 0.53% - 0s 0 0 744.00000 0 10 748.00000 744.00000 0.53% - 0s 0 0 744.00000 0 13 748.00000 744.00000 0.53% - 0s 0 0 744.00000 0 8 748.00000 744.00000 0.53% - 0s 0 0 744.00000 0 11 748.00000 744.00000 0.53% - 0s 0 0 744.00000 0 11 748.00000 744.00000 0.53% - 0s 0 0 744.00000 0 11 748.00000 744.00000 0.53% - 0s 0 0 744.00000 0 11 748.00000 744.00000 0.53% - 0s 0 2 744.00000 0 11 748.00000 744.00000 0.53% - 0s Cutting planes: Learned: 2 Cover: 3 MIR: 9 GUB cover: 5 Zero half: 2 Explored 4 nodes (1265 simplex iterations) in 0.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.480000000000e+02, best bound 7.480000000000e+02, gap 0.0%