Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:17:07 2012 Optimize a model with 1 rows, 28 columns and 28 nonzeros Model has 191 quadratic objective terms Modified 28 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 28 columns, 28 nonzeros Presolved model has 219 quadratic objective terms Variable types: 0 continuous, 28 integer (28 binary) Found heuristic solution: objective 101.0000000 Root relaxation: objective 0.000000e+00, 30 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 28 101.00000 0.00000 100% - 0s H 0 0 92.0000000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s 0 2 3.35601 0 28 85.00000 3.35601 96.1% - 0s H 10 10 82.0000000 7.24900 91.2% 1.8 0s H 357 291 79.0000000 14.04600 82.2% 2.0 0s H 1243 624 78.0000000 23.37276 70.0% 2.1 0s H 1250 594 75.0000000 23.37276 68.8% 2.1 0s H 2011 816 73.0000000 29.34168 59.8% 2.1 0s 78035 23656 67.18682 32 11 73.00000 53.89991 26.2% 2.0 5s 164128 35775 71.98633 34 9 73.00000 58.59532 19.7% 2.0 10s 243276 38707 67.31684 31 12 73.00000 61.27702 16.1% 2.0 15s 324521 33952 70.63761 33 10 73.00000 63.44585 13.1% 2.0 20s 405766 20995 66.19574 32 11 73.00000 66.19574 9.32% 2.0 25s Explored 457473 nodes (925323 simplex iterations) in 28.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.300000000000e+01, best bound 7.300000000000e+01, gap 0.0%