Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:04:46 2012 Optimize a model with 227 rows, 653 columns and 653 nonzeros Model has 452 quadratic constraints Presolve removed 0 rows and 22 columns Presolve time: 2.67s Presolved: 227 rows, 631 columns, 631 nonzeros Variable types: 452 continuous, 179 integer (178 binary) Root relaxation: objective 0.000000e+00, 79 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 103.0000000 - - - 2s 0 0 0.00000 0 3 103.00000 0.00000 100% - 2s 0 0 0.00000 0 2 103.00000 0.00000 100% - 2s 0 0 0.00000 0 101 103.00000 0.00000 100% - 2s 0 2 0.00000 0 99 103.00000 0.00000 100% - 2s * 40 34 31 21.0000000 2.60705 87.6% 36.1 2s H 108 65 18.0000000 3.66667 79.6% 24.6 2s * 199 91 17 17.0000000 4.30435 74.7% 21.4 3s 781 314 cutoff 33 17.00000 7.32000 56.9% 36.2 5s * 817 300 39 16.0000000 7.32000 54.3% 36.1 5s * 1610 153 38 15.0000000 10.27896 31.5% 35.3 6s Explored 2104 nodes (73629 simplex iterations) in 7.50 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%