Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:06:01 2012 Optimize a model with 824 rows, 129 columns and 1648 nonzeros Presolve removed 315 rows and 0 columns Presolve time: 0.01s Presolved: 509 rows, 129 columns, 1309 nonzeros Variable types: 0 continuous, 129 integer (129 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.401675e+01, 352 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44.01675 0 124 30.00000 44.01675 46.7% - 0s H 0 0 31.0000000 44.01675 42.0% - 0s 0 0 43.42963 0 127 31.00000 43.42963 40.1% - 0s 0 0 42.83044 0 127 31.00000 42.83044 38.2% - 0s H 0 0 33.0000000 42.83044 29.8% - 0s 0 0 42.55979 0 125 33.00000 42.55979 29.0% - 0s 0 0 42.36984 0 125 33.00000 42.36984 28.4% - 0s 0 0 42.28319 0 126 33.00000 42.28319 28.1% - 0s 0 0 42.10768 0 126 33.00000 42.10768 27.6% - 0s 0 0 42.07982 0 125 33.00000 42.07982 27.5% - 0s 0 0 42.00098 0 126 33.00000 42.00098 27.3% - 0s 0 0 41.89648 0 119 33.00000 41.89648 27.0% - 0s 0 0 41.88212 0 124 33.00000 41.88212 26.9% - 0s 0 0 41.88212 0 124 33.00000 41.88212 26.9% - 0s 0 2 41.88212 0 124 33.00000 41.88212 26.9% - 0s H 6 6 34.0000000 41.88212 23.2% 90.7 0s 611 217 36.71111 16 125 34.00000 39.13235 15.1% 33.9 5s 628 228 36.00000 18 126 34.00000 39.13235 15.1% 32.9 10s 3142 340 35.25000 23 84 34.00000 36.32500 6.84% 30.7 15s Cutting planes: Clique: 9 Zero half: 77 Explored 3823 nodes (111246 simplex iterations) in 15.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%