Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:09:43 2012 Optimize a model with 1 rows, 50 columns and 50 nonzeros Model has 136 quadratic objective terms Modified 50 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 50 columns, 50 nonzeros Presolved model has 186 quadratic objective terms Variable types: 0 continuous, 50 integer (50 binary) Found heuristic solution: objective 71.0000000 Root relaxation: objective 0.000000e+00, 52 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 50 71.00000 0.00000 100% - 0s H 0 0 56.0000000 0.00000 100% - 0s H 0 0 47.0000000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s H 0 0 36.0000000 0.00000 100% - 0s 0 2 1.83390 0 50 36.00000 1.83390 94.9% - 0s H 179 143 35.0000000 5.05111 85.6% 2.5 0s H 243 202 33.0000000 5.05111 84.7% 2.5 0s H 684 484 32.0000000 5.74622 82.0% 2.7 0s H 791 504 31.0000000 6.44678 79.2% 2.7 0s 57585 24845 27.16099 31 31 31.00000 21.57164 30.4% 2.4 5s 115918 41279 28.55308 35 27 31.00000 23.19090 25.2% 2.4 10s 174047 53485 27.88087 34 26 31.00000 24.18680 22.0% 2.4 15s 231434 62013 26.33916 28 34 31.00000 24.91237 19.6% 2.4 20s 288565 66969 25.49806 28 34 31.00000 25.49806 17.7% 2.4 25s 345818 68713 28.96134 32 30 31.00000 25.98258 16.2% 2.4 30s 402337 67536 26.41177 26 36 31.00000 26.41177 14.8% 2.4 35s 459214 63502 26.84423 30 32 31.00000 26.84423 13.4% 2.4 40s 516597 56325 29.76871 31 28 31.00000 27.28828 12.0% 2.4 45s 573014 45383 29.93470 36 26 31.00000 27.79404 10.3% 2.4 50s 629462 29040 28.48919 31 29 31.00000 28.48919 8.10% 2.4 55s Explored 681761 nodes (1619987 simplex iterations) in 59.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%