Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:59:09 2012 Optimize a model with 279 rows, 780 columns and 780 nonzeros Model has 556 quadratic constraints Presolve removed 0 rows and 23 columns Presolve time: 3.24s Presolved: 279 rows, 757 columns, 757 nonzeros Variable types: 556 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 0 138.0000000 - - - 3s 0 0 0.00000 0 47 138.00000 0.00000 100% - 3s 0 0 0.00000 0 94 138.00000 0.00000 100% - 3s 0 0 0.00000 0 26 138.00000 0.00000 100% - 3s 0 2 0.00000 0 174 138.00000 0.00000 100% - 3s H 44 44 29.0000000 2.96296 89.8% 39.3 3s * 116 88 36 28.0000000 2.98894 89.3% 30.3 3s * 305 214 32 27.0000000 3.48433 87.1% 30.3 3s 606 351 6.58915 10 455 27.00000 6.58915 75.6% 33.3 5s * 969 433 66 26.0000000 6.58915 74.7% 42.6 6s * 1201 423 48 24.0000000 10.00000 58.3% 40.8 7s * 2143 476 34 22.0000000 12.93023 41.2% 36.3 9s 2233 483 cutoff 27 22.00000 13.00000 40.9% 35.9 10s 3219 559 21.00000 29 431 22.00000 15.00000 31.8% 35.3 15s 3888 535 cutoff 30 22.00000 16.22917 26.2% 35.0 20s 5529 270 19.98844 32 438 22.00000 18.46296 16.1% 33.0 25s Explored 6049 nodes (198944 simplex iterations) in 27.06 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%