Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:02 2012 Optimize a model with 426 rows, 92 columns and 852 nonzeros Presolve removed 128 rows and 0 columns Presolve time: 0.00s Presolved: 298 rows, 92 columns, 695 nonzeros Variable types: 0 continuous, 92 integer (92 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.476190e+01, 208 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.76190 0 88 25.00000 34.76190 39.0% - 0s 0 0 33.97998 0 91 25.00000 33.97998 35.9% - 0s 0 0 33.71874 0 92 25.00000 33.71874 34.9% - 0s H 0 0 26.0000000 33.71874 29.7% - 0s 0 0 33.39103 0 90 26.00000 33.39103 28.4% - 0s 0 0 33.21346 0 91 26.00000 33.21346 27.7% - 0s 0 0 32.90651 0 91 26.00000 32.90651 26.6% - 0s 0 0 32.77919 0 89 26.00000 32.77919 26.1% - 0s 0 0 32.64286 0 89 26.00000 32.64286 25.5% - 0s 0 0 32.62500 0 91 26.00000 32.62500 25.5% - 0s 0 0 32.62500 0 91 26.00000 32.62500 25.5% - 0s 0 2 32.61925 0 91 26.00000 32.61925 25.5% - 0s H 93 43 27.0000000 31.31481 16.0% 22.7 0s H 145 36 28.0000000 31.13636 11.2% 20.6 0s Cutting planes: Clique: 2 Zero half: 61 Explored 367 nodes (7259 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%