Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:08:40 2012 Optimize a model with 1 rows, 27 columns and 27 nonzeros Model has 170 quadratic objective terms Modified 27 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 27 columns, 27 nonzeros Presolved model has 197 quadratic objective terms Variable types: 0 continuous, 27 integer (27 binary) Found heuristic solution: objective 101.0000000 Root relaxation: objective 0.000000e+00, 29 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 27 101.00000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s H 0 0 68.0000000 0.00000 100% - 0s 0 2 3.11236 0 27 68.00000 3.11236 95.4% - 0s H 1417 683 67.0000000 24.08305 64.1% 2.1 0s H 4622 2102 64.0000000 32.56135 49.1% 2.0 0s 87106 15799 57.68904 25 11 64.00000 51.74129 19.2% 2.0 5s 177384 5332 62.89590 26 10 64.00000 59.00764 7.80% 2.0 10s Explored 187614 nodes (379602 simplex iterations) in 10.61 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.400000000000e+01, best bound 6.400000000000e+01, gap 0.0%