Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:45:58 2012 Optimize a model with 277 rows, 783 columns and 783 nonzeros Model has 552 quadratic constraints Presolve removed 0 rows and 23 columns Presolve time: 3.22s Presolved: 277 rows, 760 columns, 760 nonzeros Variable types: 552 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 0 133.0000000 - - - 3s 0 0 0.00000 0 110 133.00000 0.00000 100% - 3s 0 0 0.00000 0 137 133.00000 0.00000 100% - 3s 0 0 0.00000 0 102 133.00000 0.00000 100% - 3s 0 2 0.00000 0 102 133.00000 0.00000 100% - 3s H 40 40 29.0000000 2.52632 91.3% 46.6 3s * 50 50 28 24.0000000 2.52632 89.5% 41.8 3s * 222 180 23 23.0000000 4.97143 78.4% 29.5 3s * 444 225 19 22.0000000 6.87500 68.8% 28.1 3s 606 287 9.95652 13 452 22.00000 9.95652 54.7% 31.1 5s 2078 448 cutoff 34 22.00000 14.16438 35.6% 36.7 10s 4034 679 cutoff 43 22.00000 16.67601 24.2% 33.1 15s 6044 571 cutoff 38 22.00000 18.22379 17.2% 32.1 20s 8439 47 21.93617 47 271 22.00000 21.80000 0.91% 29.5 25s Explored 8497 nodes (252245 simplex iterations) in 25.07 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%