Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:50:54 2012 Optimize a model with 319 rows, 880 columns and 880 nonzeros Model has 636 quadratic constraints Presolve removed 0 rows and 16 columns Presolve time: 3.69s Presolved: 319 rows, 864 columns, 864 nonzeros Variable types: 636 continuous, 228 integer (227 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 0 166.0000000 - - - 3s 0 0 0.00000 0 120 166.00000 0.00000 100% - 3s 0 0 0.00000 0 172 166.00000 0.00000 100% - 3s 0 0 0.00000 0 154 166.00000 0.00000 100% - 3s 0 2 0.00000 0 154 166.00000 0.00000 100% - 3s H 79 79 34.0000000 2.54286 92.5% 30.5 3s H 132 103 32.0000000 2.58824 91.9% 29.5 4s * 136 94 21 29.0000000 2.58824 91.1% 29.5 4s H 327 219 28.0000000 7.17757 74.4% 35.1 4s 603 315 15.65343 9 529 28.00000 9.00000 67.9% 33.6 5s 1937 602 27.00488 35 453 28.00000 14.97297 46.5% 41.4 10s 3802 1133 23.29756 33 522 28.00000 17.74641 36.6% 36.0 15s 5753 1564 25.20701 33 446 28.00000 19.33827 30.9% 33.7 20s * 6943 1320 36 26.0000000 19.88679 23.5% 32.3 22s 7778 1265 21.07982 29 506 26.00000 20.57193 20.9% 32.3 25s 9021 1056 cutoff 32 26.00000 21.70000 16.5% 32.2 30s 9357 971 23.85870 30 490 26.00000 21.98765 15.4% 32.1 35s 9636 883 23.56000 31 533 26.00000 22.24644 14.4% 32.4 40s 9888 802 cutoff 34 26.00000 22.50000 13.5% 32.4 45s 10234 670 24.35318 31 486 26.00000 22.97143 11.6% 32.3 50s 10534 490 24.89796 36 499 26.00000 23.55849 9.39% 32.4 55s Explored 11108 nodes (355056 simplex iterations) in 56.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%