Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:19:42 2012 Optimize a model with 1 rows, 51 columns and 51 nonzeros Model has 121 quadratic objective terms Modified 51 Q diagonals Presolve time: 0.02s Presolved: 1 rows, 51 columns, 51 nonzeros Presolved model has 172 quadratic objective terms Variable types: 0 continuous, 51 integer (51 binary) Found heuristic solution: objective 60.0000000 Root relaxation: objective 0.000000e+00, 53 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 51 60.00000 0.00000 100% - 0s H 0 0 52.0000000 0.00000 100% - 0s H 0 0 45.0000000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s H 0 0 34.0000000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s 0 2 1.85495 0 51 33.00000 1.85495 94.4% - 0s H 54 54 32.0000000 3.87230 87.9% 2.4 0s H 237 199 31.0000000 5.22856 83.1% 2.4 0s H 297 252 30.0000000 5.22856 82.6% 2.5 0s H 459 371 29.0000000 5.32256 81.6% 2.4 0s H 626 445 28.0000000 6.26041 77.6% 2.5 0s H 1033 552 27.0000000 8.13942 69.9% 2.6 0s H 1376 609 26.0000000 9.92816 61.8% 2.6 0s 58762 17538 cutoff 32 26.00000 19.75899 24.0% 2.7 5s 117768 21539 24.62180 28 31 26.00000 21.52674 17.2% 2.7 10s 177431 14217 24.42167 28 28 26.00000 22.97097 11.7% 2.7 15s Explored 212465 nodes (570532 simplex iterations) in 18.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%