Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:04:21 2012 Optimize a model with 229 rows, 656 columns and 656 nonzeros Model has 456 quadratic constraints Presolve removed 0 rows and 22 columns Presolve time: 2.66s Presolved: 229 rows, 634 columns, 634 nonzeros Variable types: 456 continuous, 178 integer (177 binary) Root relaxation: objective 0.000000e+00, 81 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 109.0000000 - - - 2s 0 0 0.00000 0 2 109.00000 0.00000 100% - 2s 0 0 0.00000 0 2 109.00000 0.00000 100% - 2s 0 0 0.00000 0 2 109.00000 0.00000 100% - 2s 0 2 0.00000 0 2 109.00000 0.00000 100% - 2s H 38 38 20.0000000 0.00000 100% 66.8 2s * 39 37 31 19.0000000 0.00000 100% 65.9 2s * 146 103 31 18.0000000 0.89157 95.0% 37.4 2s H 182 105 17.0000000 1.00000 94.1% 35.9 3s * 336 125 15 16.0000000 3.54687 77.8% 30.4 3s 709 258 6.59155 29 397 16.00000 6.59155 58.8% 43.9 5s * 789 257 46 15.0000000 6.59155 56.1% 44.7 5s Explored 1105 nodes (47103 simplex iterations) in 5.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%