Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:22:22 2012 Optimize a model with 286 rows, 798 columns and 798 nonzeros Model has 570 quadratic constraints Presolve removed 0 rows and 16 columns Presolve time: 3.32s Presolved: 286 rows, 782 columns, 782 nonzeros Variable types: 570 continuous, 212 integer (211 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 0 152.0000000 - - - 3s 0 0 0.00000 0 170 152.00000 0.00000 100% - 3s 0 0 0.28482 0 200 152.00000 0.28482 100% - 3s 0 2 0.28579 0 200 152.00000 0.28579 100% - 3s H 52 52 27.0000000 2.56542 90.5% 26.0 3s * 60 52 34 26.0000000 2.56542 90.1% 27.6 3s H 100 75 23.0000000 2.57478 88.8% 26.3 3s 605 283 17.30070 9 487 23.00000 9.02174 60.8% 30.2 5s 1966 631 18.15556 37 445 23.00000 12.00000 47.8% 42.6 10s * 3323 899 55 22.0000000 14.00000 36.4% 38.6 13s 3978 982 18.41799 36 473 22.00000 14.77778 32.8% 38.2 15s 5356 980 20.81818 38 496 22.00000 15.91892 27.6% 38.4 20s 5631 974 18.36364 36 494 22.00000 16.00000 27.3% 38.3 25s 6246 948 20.87640 40 448 22.00000 16.47826 25.1% 38.0 30s 7390 808 18.41520 40 430 22.00000 17.18605 21.9% 38.1 35s 8494 620 20.31293 37 484 22.00000 18.00000 18.2% 37.7 40s 9907 160 cutoff 40 22.00000 20.07602 8.75% 37.4 45s Explored 10082 nodes (376903 simplex iterations) in 45.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%