Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:53:06 2012 Optimize a model with 1 rows, 18 columns and 18 nonzeros Model has 77 quadratic objective terms Modified 18 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 18 columns, 18 nonzeros Presolved model has 95 quadratic objective terms Variable types: 0 continuous, 18 integer (18 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 20 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 18 43.00000 0.00000 100% - 0s H 0 0 42.0000000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s 0 2 2.63785 0 18 32.00000 2.63785 91.8% - 0s H 28 23 29.0000000 5.02169 82.7% 2.0 0s * 679 260 26 28.0000000 15.37142 45.1% 2.1 0s * 1156 194 26 27.0000000 16.72630 38.1% 2.1 0s Explored 2241 nodes (4670 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%