Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:04 2012 Optimize a model with 450 rows, 94 columns and 900 nonzeros Presolve removed 153 rows and 0 columns Presolve time: 0.00s Presolved: 297 rows, 94 columns, 732 nonzeros Variable types: 0 continuous, 94 integer (94 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.487500e+01, 194 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.87500 0 84 25.00000 34.87500 39.5% - 0s H 0 0 28.0000000 34.87500 24.6% - 0s 0 0 33.63158 0 89 28.00000 33.63158 20.1% - 0s 0 0 33.52477 0 94 28.00000 33.52477 19.7% - 0s 0 0 33.23469 0 92 28.00000 33.23469 18.7% - 0s 0 0 32.85075 0 89 28.00000 32.85075 17.3% - 0s 0 0 32.70647 0 89 28.00000 32.70647 16.8% - 0s 0 0 32.57078 0 93 28.00000 32.57078 16.3% - 0s 0 0 32.52527 0 93 28.00000 32.52527 16.2% - 0s 0 0 32.47520 0 91 28.00000 32.47520 16.0% - 0s 0 0 32.46869 0 93 28.00000 32.46869 16.0% - 0s 0 0 32.46869 0 93 28.00000 32.46869 16.0% - 0s 0 2 32.46737 0 93 28.00000 32.46737 16.0% - 0s * 199 19 9 29.0000000 31.00000 6.90% 19.8 0s Cutting planes: Clique: 3 Zero half: 47 Explored 244 nodes (5231 simplex iterations) in 0.20 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%