Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:58:21 2012 Optimize a model with 1 rows, 49 columns and 49 nonzeros Model has 118 quadratic objective terms Modified 49 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 49 columns, 49 nonzeros Presolved model has 167 quadratic objective terms Variable types: 0 continuous, 49 integer (49 binary) Found heuristic solution: objective 66.0000000 Root relaxation: objective 0.000000e+00, 51 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 49 66.00000 0.00000 100% - 0s H 0 0 43.0000000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s 0 2 1.78604 0 49 28.00000 1.78604 93.6% - 0s 63571 28534 24.22800 29 32 28.00000 19.31045 31.0% 2.6 5s 128449 48640 26.99121 33 29 28.00000 20.87978 25.4% 2.6 10s 192150 63147 26.91106 32 24 28.00000 21.78090 22.2% 2.6 15s 255103 73488 23.54340 31 29 28.00000 22.42393 19.9% 2.6 20s 318182 80310 25.03026 30 31 28.00000 22.94541 18.1% 2.6 25s 381180 83654 26.41654 34 26 28.00000 23.39194 16.5% 2.6 30s 444250 83797 24.94768 29 32 28.00000 23.78214 15.1% 2.6 35s 507930 80418 26.51697 29 31 28.00000 24.15254 13.7% 2.6 40s 571508 73538 26.16673 33 26 28.00000 24.51424 12.4% 2.6 45s 633911 63186 26.66785 29 33 28.00000 24.88022 11.1% 2.6 50s 696168 48762 26.75630 33 29 28.00000 25.30228 9.63% 2.6 55s 757774 28237 25.89043 34 28 28.00000 25.89043 7.53% 2.6 60s Explored 803407 nodes (2052055 simplex iterations) in 64.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%