Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:02:17 2012 Optimize a model with 287 rows, 797 columns and 797 nonzeros Model has 572 quadratic constraints Presolve removed 0 rows and 17 columns Presolve time: 3.34s Presolved: 287 rows, 780 columns, 780 nonzeros Variable types: 572 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 0 138.0000000 - - - 3s 0 0 0.00000 0 116 138.00000 0.00000 100% - 3s 0 0 0.02574 0 195 138.00000 0.02574 100% - 3s 0 2 0.05116 0 195 138.00000 0.05116 100% - 3s H 54 54 35.0000000 1.75168 95.0% 28.7 3s * 61 61 33 32.0000000 1.75168 94.5% 28.0 3s * 104 84 27 28.0000000 1.84615 93.4% 29.2 3s * 353 211 40 26.0000000 5.00000 80.8% 28.8 3s H 376 185 25.0000000 5.00000 80.0% 28.3 3s 606 276 8.08844 13 472 25.00000 8.08844 67.6% 32.6 5s 2164 639 17.76882 29 483 25.00000 14.12587 43.5% 37.0 10s 4312 1144 17.53514 35 469 25.00000 16.63717 33.5% 34.4 15s * 5730 1218 44 24.0000000 17.50000 27.1% 33.6 18s H 5869 1047 23.0000000 17.66667 23.2% 34.0 18s 6388 973 21.27218 34 468 23.00000 18.20000 20.9% 34.5 20s 7706 669 21.97440 35 414 23.00000 19.58140 14.9% 34.8 25s 8143 460 21.74468 33 463 23.00000 20.41935 11.2% 34.9 30s 8536 197 21.49351 39 400 23.00000 21.25058 7.61% 34.7 35s Explored 8753 nodes (301828 simplex iterations) in 36.31 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%