Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:21:32 2012 Optimize a model with 267 rows, 760 columns and 760 nonzeros Model has 532 quadratic constraints Presolve removed 0 rows and 20 columns Presolve time: 3.11s Presolved: 267 rows, 740 columns, 740 nonzeros Variable types: 532 continuous, 208 integer (207 binary) Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 137.0000000 - - - 3s 0 0 0.00000 0 57 137.00000 0.00000 100% - 3s 0 0 0.00000 0 78 137.00000 0.00000 100% - 3s 0 0 0.00000 0 78 137.00000 0.00000 100% - 3s 0 2 0.00000 0 64 137.00000 0.00000 100% - 3s H 43 43 30.0000000 1.86408 93.8% 40.6 3s H 126 85 27.0000000 2.55789 90.5% 23.7 3s * 126 84 42 26.0000000 2.55789 90.2% 23.8 3s H 155 90 24.0000000 2.56250 89.3% 23.8 3s H 189 116 23.0000000 2.59375 88.7% 24.1 3s H 572 243 22.0000000 5.63934 74.4% 20.5 3s * 615 256 57 21.0000000 5.63934 73.1% 19.5 3s 712 306 6.66258 13 705 21.00000 6.66258 68.3% 22.8 5s * 834 337 39 20.0000000 6.66258 66.7% 30.7 5s * 1005 344 51 19.0000000 7.50000 60.5% 31.5 6s * 1057 325 47 18.0000000 8.60345 52.2% 31.8 6s Explored 1899 nodes (61630 simplex iterations) in 7.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%