Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:32 2012 Optimize a model with 736 rows, 116 columns and 1472 nonzeros Presolve removed 290 rows and 0 columns Presolve time: 0.00s Presolved: 446 rows, 116 columns, 1170 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.831996e+01, 285 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.31996 0 115 28.00000 38.31996 36.9% - 0s 0 0 37.88938 0 116 28.00000 37.88938 35.3% - 0s 0 0 37.72565 0 116 28.00000 37.72565 34.7% - 0s 0 0 37.61665 0 116 28.00000 37.61665 34.3% - 0s 0 0 37.47170 0 116 28.00000 37.47170 33.8% - 0s 0 0 37.34169 0 115 28.00000 37.34169 33.4% - 0s 0 0 37.23891 0 115 28.00000 37.23891 33.0% - 0s H 0 0 29.0000000 37.23891 28.4% - 0s 0 0 37.13770 0 115 29.00000 37.13770 28.1% - 0s 0 0 37.07621 0 115 29.00000 37.07621 27.8% - 0s 0 0 37.03050 0 115 29.00000 37.03050 27.7% - 0s 0 0 36.90914 0 114 29.00000 36.90914 27.3% - 0s 0 0 36.87331 0 115 29.00000 36.87331 27.1% - 0s 0 0 36.82157 0 115 29.00000 36.82157 27.0% - 0s 0 0 36.78333 0 115 29.00000 36.78333 26.8% - 0s 0 0 36.77827 0 116 29.00000 36.77827 26.8% - 0s 0 0 36.77827 0 116 29.00000 36.77827 26.8% - 0s H 0 0 30.0000000 36.77827 22.6% - 0s 0 2 36.77685 0 116 30.00000 36.77685 22.6% - 0s H 163 34 31.0000000 35.61739 14.9% 33.4 0s Cutting planes: Clique: 3 Zero half: 43 Explored 687 nodes (21155 simplex iterations) in 0.87 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%