Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:54:07 2012 Optimize a model with 1 rows, 21 columns and 21 nonzeros Model has 111 quadratic objective terms Modified 21 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 21 columns, 21 nonzeros Presolved model has 132 quadratic objective terms Variable types: 0 continuous, 21 integer (21 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 0.000000e+00, 23 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 21 60.00000 0.00000 100% - 0s H 0 0 54.0000000 0.00000 100% - 0s H 0 0 53.0000000 0.00000 100% - 0s H 0 0 52.0000000 0.00000 100% - 0s H 0 0 51.0000000 0.00000 100% - 0s 0 2 2.63505 0 21 51.00000 2.63505 94.8% - 0s H 4 4 46.0000000 4.69365 89.8% 1.5 0s H 828 399 45.0000000 15.26411 66.1% 2.1 0s Explored 23795 nodes (48423 simplex iterations) in 1.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%