Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:13:36 2012 Optimize a model with 307 rows, 847 columns and 847 nonzeros Model has 612 quadratic constraints Presolve removed 0 rows and 18 columns Presolve time: 3.58s Presolved: 307 rows, 829 columns, 829 nonzeros Variable types: 612 continuous, 217 integer (216 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 0 162.0000000 - - - 3s 0 0 0.00000 0 179 162.00000 0.00000 100% - 3s 0 0 0.27641 0 208 162.00000 0.27641 100% - 3s 0 2 0.27766 0 208 162.00000 0.27766 100% - 3s H 50 50 32.0000000 2.37500 92.6% 35.0 3s H 174 111 30.0000000 5.50282 81.7% 28.0 3s 607 346 9.00000 11 817 30.00000 9.00000 70.0% 34.3 5s * 1022 474 60 29.0000000 9.00000 69.0% 40.5 6s * 1312 481 35 28.0000000 12.23091 56.3% 38.8 7s 2230 672 25.59341 34 470 28.00000 16.81529 39.9% 35.7 10s 3139 943 20.00535 27 482 28.00000 18.00000 35.7% 33.8 15s 3786 1074 26.91861 34 446 28.00000 18.79769 32.9% 32.1 20s 5179 1292 25.35958 33 490 28.00000 19.88889 29.0% 31.3 25s 6558 1483 25.97801 34 470 28.00000 20.61742 26.4% 30.8 30s * 6994 1411 38 27.0000000 20.90748 22.6% 30.6 31s 8219 1366 23.90748 29 433 27.00000 21.53750 20.2% 30.0 35s 9636 1188 25.14754 34 465 27.00000 22.39441 17.1% 30.2 40s 11455 833 23.97959 34 395 27.00000 23.33333 13.6% 30.0 45s Explored 13232 nodes (396577 simplex iterations) in 49.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%