Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:10:45 2012 Optimize a model with 1 rows, 27 columns and 27 nonzeros Model has 186 quadratic objective terms Modified 27 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 27 columns, 27 nonzeros Presolved model has 213 quadratic objective terms Variable types: 0 continuous, 27 integer (27 binary) Found heuristic solution: objective 96.0000000 Root relaxation: objective 0.000000e+00, 28 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 96.00000 0.00000 100% - 0s H 0 0 88.0000000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s 0 2 2.63244 0 27 83.00000 2.63244 96.8% - 0s H 17 17 79.0000000 6.07825 92.3% 1.9 0s * 455 381 21 78.0000000 14.67957 81.2% 2.0 0s * 496 381 13 74.0000000 15.47895 79.1% 2.0 0s H 3384 1509 73.0000000 32.63688 55.3% 2.0 0s H27670 10364 71.0000000 47.21637 33.5% 2.0 2s 65118 18339 61.59223 24 12 71.00000 52.76146 25.7% 2.0 5s 122641 24547 60.94748 24 12 71.00000 57.19878 19.4% 2.0 10s 180332 24174 60.23361 24 12 71.00000 60.23361 15.2% 2.0 15s 235710 17216 63.03900 25 11 71.00000 63.03900 11.2% 2.0 20s Explored 285769 nodes (573091 simplex iterations) in 24.62 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.100000000000e+01, best bound 7.100000000000e+01, gap 0.0%