Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:50 2012 Optimize a model with 1 rows, 41 columns and 41 nonzeros Model has 92 quadratic objective terms Modified 40 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 41 columns, 41 nonzeros Presolved model has 132 quadratic objective terms Variable types: 0 continuous, 41 integer (41 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 0.000000e+00, 44 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 40 48.00000 0.00000 100% - 0s H 0 0 36.0000000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 2 0.00000 0 40 25.00000 0.00000 100% - 0s H 11 11 22.0000000 2.47877 88.7% 2.6 0s H 47 37 21.0000000 2.48685 88.2% 2.7 0s H 653 383 20.0000000 5.07634 74.6% 2.7 0s Explored 12809 nodes (34086 simplex iterations) in 0.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%