Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:05 2012 Optimize a model with 424 rows, 94 columns and 848 nonzeros Presolve removed 147 rows and 0 columns Presolve time: 0.00s Presolved: 277 rows, 94 columns, 673 nonzeros Variable types: 0 continuous, 94 integer (94 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.466667e+01, 150 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.66667 0 76 25.00000 34.66667 38.7% - 0s H 0 0 26.0000000 34.66667 33.3% - 0s 0 0 34.03232 0 92 26.00000 34.03232 30.9% - 0s 0 0 33.63889 0 91 26.00000 33.63889 29.4% - 0s 0 0 33.33843 0 93 26.00000 33.33843 28.2% - 0s H 0 0 27.0000000 33.33843 23.5% - 0s 0 0 33.26199 0 93 27.00000 33.26199 23.2% - 0s 0 0 33.09721 0 93 27.00000 33.09721 22.6% - 0s H 0 0 28.0000000 33.09721 18.2% - 0s H 0 0 29.0000000 33.09721 14.1% - 0s 0 0 32.93182 0 88 29.00000 32.93182 13.6% - 0s 0 0 32.81117 0 92 29.00000 32.81117 13.1% - 0s 0 0 32.75227 0 93 29.00000 32.75227 12.9% - 0s 0 0 32.73723 0 93 29.00000 32.73723 12.9% - 0s 0 0 32.73723 0 92 29.00000 32.73723 12.9% - 0s 0 2 32.73088 0 92 29.00000 32.73088 12.9% - 0s Cutting planes: Gomory: 1 Clique: 1 Zero half: 60 Explored 143 nodes (4327 simplex iterations) in 0.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%