Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:32:50 2012 Optimize a model with 1 rows, 52 columns and 52 nonzeros Model has 131 quadratic objective terms Modified 52 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 52 columns, 52 nonzeros Presolved model has 183 quadratic objective terms Variable types: 0 continuous, 52 integer (52 binary) Found heuristic solution: objective 72.0000000 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 72.00000 0.00000 100% - 0s H 0 0 46.0000000 0.00000 100% - 0s H 0 0 44.0000000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s 0 2 1.88019 0 52 32.00000 1.88019 94.1% - 0s H 643 491 31.0000000 6.05531 80.5% 2.5 0s H 659 479 30.0000000 6.05531 79.8% 2.5 0s 56103 27371 22.01350 22 39 30.00000 19.53530 34.9% 2.4 5s H59403 27193 29.0000000 19.67341 32.2% 2.4 5s 112714 43987 26.81333 29 31 29.00000 21.18567 26.9% 2.4 10s 169560 57625 22.98313 28 31 29.00000 22.15022 23.6% 2.4 15s 225654 68049 26.70814 29 31 29.00000 22.80470 21.4% 2.4 20s 281882 75677 25.73277 28 33 29.00000 23.33977 19.5% 2.4 25s 337482 80869 24.60002 29 30 29.00000 23.79083 18.0% 2.4 30s 393261 83435 27.44742 32 24 29.00000 24.17634 16.6% 2.4 35s 448954 83657 24.52431 24 37 29.00000 24.52431 15.4% 2.4 40s 505008 81374 27.74302 29 32 29.00000 24.85348 14.3% 2.4 45s 561338 76763 25.75276 27 34 29.00000 25.16738 13.2% 2.4 50s 617191 69598 27.43966 28 33 29.00000 25.48233 12.1% 2.4 55s 672695 60007 25.81720 27 33 29.00000 25.81041 11.0% 2.4 60s 728031 47286 26.19235 26 35 29.00000 26.19235 9.68% 2.4 65s 782637 29899 26.79269 26 35 29.00000 26.72216 7.85% 2.4 70s Explored 832835 nodes (1999163 simplex iterations) in 75.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%