Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:23 2012 Optimize a model with 1 rows, 40 columns and 40 nonzeros Model has 87 quadratic objective terms Modified 40 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 40 columns, 40 nonzeros Presolved model has 127 quadratic objective terms Variable types: 0 continuous, 40 integer (40 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 0.000000e+00, 42 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 52.00000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 2 1.14560 0 40 25.00000 1.14560 95.4% - 0s H 16 16 23.0000000 2.27443 90.1% 1.9 0s H 25 25 22.0000000 2.27443 89.7% 2.0 0s H 50 41 20.0000000 2.27892 88.6% 2.5 0s H 83 54 17.0000000 3.96533 76.7% 2.4 0s H 85 52 16.0000000 3.96533 75.2% 2.4 0s Explored 5307 nodes (13851 simplex iterations) in 0.44 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.600000000000e+01, best bound 1.600000000000e+01, gap 0.0%