Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:18:59 2012 Optimize a model with 267 rows, 759 columns and 759 nonzeros Model has 532 quadratic constraints Presolve removed 0 rows and 22 columns Presolve time: 3.10s Presolved: 267 rows, 737 columns, 737 nonzeros Variable types: 532 continuous, 205 integer (204 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 0 122.0000000 - - - 3s 0 0 0.00000 0 3 122.00000 0.00000 100% - 3s 0 0 0.00000 0 5 122.00000 0.00000 100% - 3s 0 0 0.00000 0 127 122.00000 0.00000 100% - 3s 0 2 0.00000 0 118 122.00000 0.00000 100% - 3s H 40 40 28.0000000 2.55814 90.9% 43.8 3s * 48 46 38 27.0000000 2.55814 90.5% 39.6 3s * 106 69 29 26.0000000 2.56250 90.1% 27.7 3s H 264 171 25.0000000 4.41429 82.3% 24.6 3s * 502 180 13 21.0000000 6.42553 69.4% 23.5 3s 607 212 7.67957 13 716 21.00000 7.67957 63.4% 28.0 5s * 779 277 47 20.0000000 7.67957 61.6% 37.9 6s * 792 254 54 19.0000000 7.67957 59.6% 38.0 6s 2220 275 17.27500 38 397 19.00000 13.26984 30.2% 36.8 10s 3062 161 17.32570 35 432 19.00000 15.18516 20.1% 35.8 15s Explored 3460 nodes (123936 simplex iterations) in 17.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%