Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:08:51 2012 Optimize a model with 1 rows, 27 columns and 27 nonzeros Model has 170 quadratic objective terms Modified 27 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 27 columns, 27 nonzeros Presolved model has 197 quadratic objective terms Variable types: 0 continuous, 27 integer (27 binary) Found heuristic solution: objective 93.0000000 Root relaxation: objective 0.000000e+00, 29 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 27 93.00000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s H 0 0 66.0000000 0.00000 100% - 0s 0 2 2.62142 0 27 66.00000 2.62142 96.0% - 0s H 1139 589 65.0000000 21.09008 67.6% 2.0 0s 93754 20740 58.21059 28 8 65.00000 51.11300 21.4% 2.0 5s 194364 21742 62.70942 24 12 65.00000 55.63283 14.4% 2.0 10s 292814 1194 63.07433 25 11 65.00000 63.07433 2.96% 2.0 15s Explored 294112 nodes (592502 simplex iterations) in 15.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.500000000000e+01, best bound 6.500000000000e+01, gap 0.0%