Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:31 2012 Optimize a model with 645 rows, 116 columns and 1290 nonzeros Presolve removed 241 rows and 0 columns Presolve time: 0.00s Presolved: 404 rows, 116 columns, 1016 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.088218e+01, 275 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.88218 0 109 28.00000 40.88218 46.0% - 0s H 0 0 30.0000000 40.88218 36.3% - 0s 0 0 40.00000 0 111 30.00000 40.00000 33.3% - 0s H 0 0 31.0000000 40.00000 29.0% - 0s 0 0 39.81800 0 109 31.00000 39.81800 28.4% - 0s 0 0 39.46626 0 113 31.00000 39.46626 27.3% - 0s 0 0 39.35604 0 113 31.00000 39.35604 27.0% - 0s 0 0 39.28354 0 112 31.00000 39.28354 26.7% - 0s 0 0 39.13333 0 110 31.00000 39.13333 26.2% - 0s 0 0 39.00691 0 115 31.00000 39.00691 25.8% - 0s 0 0 38.97370 0 113 31.00000 38.97370 25.7% - 0s 0 0 38.92480 0 113 31.00000 38.92480 25.6% - 0s 0 0 38.84501 0 113 31.00000 38.84501 25.3% - 0s 0 0 38.76855 0 113 31.00000 38.76855 25.1% - 0s 0 0 38.66430 0 113 31.00000 38.66430 24.7% - 0s 0 0 38.63066 0 114 31.00000 38.63066 24.6% - 0s H 0 0 32.0000000 38.63066 20.7% - 0s 0 0 38.62076 0 115 32.00000 38.62076 20.7% - 0s 0 0 38.62076 0 115 32.00000 38.62076 20.7% - 0s 0 2 38.62076 0 115 32.00000 38.62076 20.7% - 0s H 4 4 33.0000000 38.61739 17.0% 113 0s * 33 7 6 35.0000000 38.25631 9.30% 40.8 0s Cutting planes: Clique: 3 Zero half: 63 Mod-K: 2 Explored 114 nodes (5645 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%