Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:16 2012 Optimize a model with 662 rows, 116 columns and 1324 nonzeros Presolve removed 238 rows and 0 columns Presolve time: 0.00s Presolved: 424 rows, 116 columns, 1058 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.043237e+01, 310 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.43237 0 113 30.00000 40.43237 34.8% - 0s 0 0 40.09029 0 113 30.00000 40.09029 33.6% - 0s 0 0 39.87648 0 112 30.00000 39.87648 32.9% - 0s H 0 0 31.0000000 39.87648 28.6% - 0s 0 0 39.48304 0 112 31.00000 39.48304 27.4% - 0s 0 0 39.23307 0 115 31.00000 39.23307 26.6% - 0s 0 0 39.02235 0 113 31.00000 39.02235 25.9% - 0s 0 0 38.80484 0 113 31.00000 38.80484 25.2% - 0s 0 0 38.74246 0 114 31.00000 38.74246 25.0% - 0s 0 0 38.72806 0 114 31.00000 38.72806 24.9% - 0s 0 0 38.69225 0 114 31.00000 38.69225 24.8% - 0s 0 0 38.63631 0 114 31.00000 38.63631 24.6% - 0s 0 0 38.58817 0 114 31.00000 38.58817 24.5% - 0s 0 0 38.53452 0 114 31.00000 38.53452 24.3% - 0s 0 0 38.49280 0 115 31.00000 38.49280 24.2% - 0s 0 0 38.48919 0 114 31.00000 38.48919 24.2% - 0s 0 0 38.48283 0 114 31.00000 38.48283 24.1% - 0s 0 0 38.48283 0 113 31.00000 38.48283 24.1% - 0s 0 2 38.48283 0 113 31.00000 38.48283 24.1% - 0s * 13 13 9 32.0000000 38.48283 20.3% 39.2 0s * 89 33 11 33.0000000 37.21429 12.8% 35.0 0s Cutting planes: Clique: 2 Zero half: 43 Explored 585 nodes (16212 simplex iterations) in 0.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%