Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:46:16 2012 Optimize a model with 276 rows, 771 columns and 771 nonzeros Model has 550 quadratic constraints Presolve removed 0 rows and 20 columns Presolve time: 3.21s Presolved: 276 rows, 751 columns, 751 nonzeros Variable types: 550 continuous, 201 integer (200 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 0 131.0000000 - - - 3s 0 0 0.00000 0 2 131.00000 0.00000 100% - 3s 0 0 0.00000 0 2 131.00000 0.00000 100% - 3s 0 0 0.00000 0 101 131.00000 0.00000 100% - 3s 0 2 0.00000 0 101 131.00000 0.00000 100% - 3s H 39 39 28.0000000 2.11111 92.5% 42.1 3s H 411 259 27.0000000 4.36923 83.8% 22.3 3s H 412 245 26.0000000 4.36923 83.2% 22.3 3s 606 365 6.44604 13 444 26.00000 6.44604 75.2% 26.8 5s * 877 427 47 23.0000000 6.44604 72.0% 40.0 6s 2206 576 14.00000 30 439 23.00000 13.00000 43.5% 39.0 10s 3170 778 16.19298 29 446 23.00000 14.45455 37.2% 36.9 15s 4377 936 22.00000 38 440 23.00000 15.54839 32.4% 36.0 20s H 5044 893 22.0000000 16.07595 26.9% 35.9 22s H 5510 758 21.0000000 16.53731 21.3% 35.7 24s 5634 738 cutoff 33 21.00000 16.78889 20.1% 35.5 25s 6748 249 cutoff 35 21.00000 18.96907 9.67% 36.2 30s Explored 7024 nodes (255674 simplex iterations) in 30.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%