Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:31:47 2012 Optimize a model with 1 rows, 52 columns and 52 nonzeros Model has 123 quadratic objective terms Modified 52 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 52 columns, 52 nonzeros Presolved model has 175 quadratic objective terms Variable types: 0 continuous, 52 integer (52 binary) Found heuristic solution: objective 62.0000000 Root relaxation: objective 0.000000e+00, 54 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 52 62.00000 0.00000 100% - 0s H 0 0 45.0000000 0.00000 100% - 0s H 0 0 43.0000000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s H 0 0 34.0000000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 2 1.86038 0 52 31.00000 1.86038 94.0% - 0s H 145 125 30.0000000 3.60599 88.0% 2.5 0s H 209 176 29.0000000 3.69745 87.3% 2.4 0s H 216 179 28.0000000 3.69745 86.8% 2.4 0s H 1280 732 27.0000000 8.28184 69.3% 2.6 0s H 1497 734 26.0000000 9.03671 65.2% 2.6 0s 57522 23316 24.23174 30 30 26.00000 18.23361 29.9% 2.5 5s 115685 38255 24.62341 25 35 26.00000 19.67512 24.3% 2.5 10s 173222 47833 20.53923 23 36 26.00000 20.53851 21.0% 2.5 15s 230626 53229 22.14192 26 33 26.00000 21.17801 18.5% 2.5 20s 288132 54704 22.86000 29 29 26.00000 21.70415 16.5% 2.5 25s 345804 52314 22.16166 25 36 26.00000 22.16166 14.8% 2.5 30s 403695 45818 24.05252 27 33 26.00000 22.62840 13.0% 2.5 35s 461046 35011 24.47883 26 34 26.00000 23.14060 11.0% 2.5 40s 517950 17218 24.56364 29 32 26.00000 23.93360 7.95% 2.5 45s Explored 544974 nodes (1365593 simplex iterations) in 47.60 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%