Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:27:18 2012 Optimize a model with 294 rows, 815 columns and 815 nonzeros Model has 586 quadratic constraints Presolve removed 0 rows and 12 columns Presolve time: 3.42s Presolved: 294 rows, 803 columns, 803 nonzeros Variable types: 586 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 0 160.0000000 - - - 3s 0 0 0.00000 0 2 160.00000 0.00000 100% - 3s 0 0 0.00000 0 3 160.00000 0.00000 100% - 3s 0 0 0.00000 0 127 160.00000 0.00000 100% - 3s 0 2 0.00000 0 123 160.00000 0.00000 100% - 3s H 41 41 31.0000000 3.03529 90.2% 38.7 3s H 54 52 29.0000000 3.03529 89.5% 36.7 3s * 58 54 45 28.0000000 3.03529 89.2% 35.3 3s * 62 48 48 27.0000000 3.03529 88.8% 33.6 3s * 132 93 28 23.0000000 3.86364 83.2% 28.2 3s 605 325 14.06757 9 500 23.00000 8.40500 63.5% 24.0 5s 1982 553 15.19406 35 481 23.00000 14.00000 39.1% 37.6 10s 4164 974 19.28108 42 469 23.00000 16.47216 28.4% 33.6 15s 6400 1134 22.25962 41 509 23.00000 17.84625 22.4% 32.5 20s 8801 1133 20.25143 44 450 23.00000 18.84058 18.1% 31.2 25s 11218 851 22.70270 39 396 23.00000 19.75555 14.1% 30.5 30s 13687 260 22.08434 47 423 23.00000 21.09901 8.27% 30.0 35s Explored 14200 nodes (421636 simplex iterations) in 35.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%