Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:57:06 2012 Optimize a model with 325 rows, 893 columns and 893 nonzeros Model has 648 quadratic constraints Presolve removed 0 rows and 17 columns Presolve time: 3.83s Presolved: 325 rows, 876 columns, 876 nonzeros Variable types: 648 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 0 165.0000000 - - - 3s 0 0 0.00000 0 161 165.00000 0.00000 100% - 3s 0 0 0.13753 0 207 165.00000 0.13753 100% - 3s 0 2 0.15341 0 207 165.00000 0.15341 100% - 3s H 54 54 35.0000000 1.31169 96.3% 38.9 4s H 80 78 33.0000000 1.31169 96.0% 37.1 4s * 80 70 49 32.0000000 1.31169 95.9% 37.1 4s * 325 235 36 31.0000000 4.19316 86.5% 38.8 4s 538 327 15.35735 7 199 31.00000 7.09836 77.1% 36.7 5s 1812 629 19.90338 36 527 31.00000 14.00000 54.8% 42.7 10s 3450 1136 27.00000 39 486 31.00000 17.92265 42.2% 39.1 15s H 3492 932 29.0000000 17.97207 38.0% 39.1 15s 5168 1157 26.07843 40 521 29.00000 20.50360 29.3% 36.9 20s H 5633 1047 28.0000000 20.95429 25.2% 36.4 23s H 5661 876 27.0000000 20.96371 22.4% 36.5 25s 5940 843 23.88835 37 545 27.00000 21.37313 20.8% 36.8 30s 6080 820 24.76166 44 502 27.00000 21.57500 20.1% 36.9 35s 6477 762 25.12500 37 482 27.00000 22.25000 17.6% 36.7 40s 7323 536 25.88889 42 474 27.00000 23.50000 13.0% 36.0 45s Explored 8107 nodes (283862 simplex iterations) in 48.20 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%