Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:18:07 2012 Optimize a model with 256 rows, 722 columns and 722 nonzeros Model has 510 quadratic constraints Presolve removed 0 rows and 21 columns Presolve time: 2.97s Presolved: 256 rows, 701 columns, 701 nonzeros Variable types: 510 continuous, 191 integer (190 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 0 134.0000000 - - - 2s 0 0 0.00000 0 3 134.00000 0.00000 100% - 2s 0 0 0.00000 0 3 134.00000 0.00000 100% - 2s 0 0 0.00000 0 3 134.00000 0.00000 100% - 3s 0 2 0.00000 0 2 134.00000 0.00000 100% - 3s * 31 31 22 29.0000000 0.30935 98.9% 80.9 3s * 85 71 36 28.0000000 0.57576 97.9% 48.3 3s * 148 104 22 26.0000000 1.00000 96.2% 42.2 3s H 505 221 23.0000000 4.00000 82.6% 29.2 3s 617 274 7.60607 18 414 23.00000 5.31186 76.9% 35.3 5s * 1820 439 45 21.0000000 11.24658 46.4% 34.5 7s 2877 641 17.84812 36 412 21.00000 13.34812 36.4% 32.9 10s * 2946 556 46 20.0000000 13.42254 32.9% 33.1 10s 4046 497 17.14789 34 421 20.00000 15.00000 25.0% 33.1 15s 4854 345 17.33099 37 400 20.00000 16.28448 18.6% 33.0 20s Explored 5610 nodes (184327 simplex iterations) in 22.46 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%