Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:20:10 2012 Optimize a model with 1 rows, 51 columns and 51 nonzeros Model has 128 quadratic objective terms Modified 51 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 51 columns, 51 nonzeros Presolved model has 179 quadratic objective terms Variable types: 0 continuous, 51 integer (51 binary) Found heuristic solution: objective 70.0000000 Root relaxation: objective 0.000000e+00, 53 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 51 70.00000 0.00000 100% - 0s H 0 0 52.0000000 0.00000 100% - 0s H 0 0 45.0000000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s 0 2 1.79341 0 51 32.00000 1.79341 94.4% - 0s H 607 458 29.0000000 5.81002 80.0% 2.5 0s 61584 27977 22.06355 23 38 29.00000 19.98389 31.1% 2.6 5s 124156 48093 23.99614 26 34 29.00000 21.55886 25.7% 2.6 10s 186407 63194 26.94539 30 28 29.00000 22.50883 22.4% 2.6 15s 247912 74218 23.21483 28 33 29.00000 23.16952 20.1% 2.6 20s 309860 82036 27.08553 28 32 29.00000 23.71701 18.2% 2.6 25s 371801 86401 25.76667 30 29 29.00000 24.18029 16.6% 2.6 30s 433081 87442 27.49734 31 28 29.00000 24.57431 15.3% 2.6 35s 495002 85263 27.27299 31 26 29.00000 24.94861 14.0% 2.6 40s 556691 80116 26.84565 36 22 29.00000 25.29607 12.8% 2.6 45s 618117 71808 25.65158 26 35 29.00000 25.65158 11.5% 2.6 50s 678591 59965 26.03103 30 29 29.00000 26.03103 10.2% 2.6 55s 738726 43746 26.62345 29 31 29.00000 26.48818 8.66% 2.6 60s 797788 19799 27.20640 32 26 29.00000 27.20640 6.18% 2.6 65s Explored 824713 nodes (2135851 simplex iterations) in 67.56 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%