Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:19 2012 Optimize a model with 1 rows, 40 columns and 40 nonzeros Model has 81 quadratic objective terms Modified 38 Q diagonals Presolve removed 0 rows and 1 columns Presolve time: 0.01s Presolved: 1 rows, 39 columns, 39 nonzeros Presolved model has 119 quadratic objective terms Variable types: 0 continuous, 39 integer (38 binary) Found heuristic solution: objective 35.0000000 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 38 35.00000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 2 0.00000 0 38 22.00000 0.00000 100% - 0s H 62 50 20.0000000 1.65612 91.7% 2.4 0s H 76 60 19.0000000 1.65612 91.3% 2.4 0s H 102 72 18.0000000 2.99684 83.4% 2.5 0s H 108 73 17.0000000 2.99684 82.4% 2.4 0s H 497 292 16.0000000 4.59220 71.3% 2.5 0s Explored 7777 nodes (20169 simplex iterations) in 0.59 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%