Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:16:30 2012 Optimize a model with 1 rows, 28 columns and 28 nonzeros Model has 189 quadratic objective terms Modified 28 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 28 columns, 28 nonzeros Presolved model has 217 quadratic objective terms Variable types: 0 continuous, 28 integer (28 binary) Found heuristic solution: objective 98.0000000 Root relaxation: objective 0.000000e+00, 30 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 28 98.00000 0.00000 100% - 0s H 0 0 89.0000000 0.00000 100% - 0s 0 2 3.09275 0 28 89.00000 3.09275 96.5% - 0s H 19 19 87.0000000 6.69474 92.3% 1.9 0s H 55 43 80.0000000 6.71422 91.6% 2.0 0s H 608 446 79.0000000 15.03799 81.0% 2.1 0s H 677 453 76.0000000 15.03799 80.2% 2.1 0s H 3723 1808 75.0000000 33.34107 55.5% 2.1 0s H17453 7998 74.0000000 43.60315 41.1% 2.0 1s 84778 28395 72.48339 36 7 74.00000 53.64801 27.5% 2.0 5s 174327 44401 57.97346 29 14 74.00000 57.97346 21.7% 2.0 10s 262879 53182 60.51507 31 12 74.00000 60.51507 18.2% 2.0 15s 352094 55614 69.51733 33 10 74.00000 62.47273 15.6% 2.0 20s 442408 51168 71.35292 35 8 74.00000 64.20548 13.2% 2.0 25s 535119 39346 70.87450 32 11 74.00000 66.11275 10.7% 2.0 30s 621856 17810 69.07929 32 11 74.00000 69.07929 6.65% 2.0 35s Explored 654068 nodes (1342160 simplex iterations) in 37.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.400000000000e+01, best bound 7.400000000000e+01, gap 0.0%