Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:49:55 2012 Optimize a model with 163 rows, 406 columns and 406 nonzeros Model has 324 quadratic constraints Presolve removed 0 rows and 2 columns Presolve time: 1.89s Presolved: 163 rows, 404 columns, 404 nonzeros Variable types: 324 continuous, 80 integer (79 binary) Root relaxation: objective 0.000000e+00, 41 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 84.0000000 - - - 1s 0 0 0.00000 0 2 84.00000 0.00000 100% - 1s 0 0 0.00000 0 69 84.00000 0.00000 100% - 1s 0 0 0.00000 0 63 84.00000 0.00000 100% - 1s 0 2 0.00000 0 63 84.00000 0.00000 100% - 1s H 50 50 41.0000000 2.30508 94.4% 37.0 2s * 50 50 29 40.0000000 2.30508 94.2% 37.7 2s H 86 58 32.0000000 3.56250 88.9% 32.6 2s * 112 65 16 27.0000000 5.00000 81.5% 31.3 2s * 842 309 49 26.0000000 12.91429 50.3% 36.9 3s 2029 254 cutoff 32 26.00000 18.00000 30.8% 29.4 5s * 2159 227 39 25.0000000 18.26648 26.9% 28.6 5s Explored 3137 nodes (79482 simplex iterations) in 6.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0%