Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:09:44 2012 Optimize a model with 1 rows, 27 columns and 27 nonzeros Model has 178 quadratic objective terms Modified 27 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 27 columns, 27 nonzeros Presolved model has 205 quadratic objective terms Variable types: 0 continuous, 27 integer (27 binary) Found heuristic solution: objective 90.0000000 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 90.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s H 0 0 76.0000000 0.00000 100% - 0s 0 2 2.62621 0 27 76.00000 2.62621 96.5% - 0s H 134 101 75.0000000 10.29362 86.3% 2.0 0s * 517 403 15 74.0000000 14.55705 80.3% 2.0 0s H 564 421 73.0000000 15.67276 78.5% 2.0 0s H 585 434 72.0000000 15.67276 78.2% 2.0 0s H 1396 705 71.0000000 23.49776 66.9% 2.1 0s H13760 6124 69.0000000 40.93436 40.7% 2.0 0s H60170 18980 68.0000000 50.16287 26.2% 2.0 4s 73732 21318 65.79304 25 11 68.00000 51.39720 24.4% 2.0 5s 144217 27987 59.92292 24 12 68.00000 55.85381 17.9% 2.0 10s 216228 24944 64.48210 25 11 68.00000 59.00125 13.2% 2.0 15s 289933 8979 63.43943 25 11 68.00000 63.43943 6.71% 2.0 20s Explored 306259 nodes (615984 simplex iterations) in 21.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.800000000000e+01, best bound 6.800000000000e+01, gap 0.0%