Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:01:02 2012 Optimize a model with 1 rows, 49 columns and 49 nonzeros Model has 124 quadratic objective terms Modified 49 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 49 columns, 49 nonzeros Presolved model has 173 quadratic objective terms Variable types: 0 continuous, 49 integer (49 binary) Found heuristic solution: objective 67.0000000 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 67.00000 0.00000 100% - 0s H 0 0 54.0000000 0.00000 100% - 0s H 0 0 42.0000000 0.00000 100% - 0s H 0 0 34.0000000 0.00000 100% - 0s H 0 0 29.0000000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s 0 2 1.96376 0 49 28.00000 1.96376 93.0% - 0s H 487 343 27.0000000 6.13411 77.3% 2.6 0s H 541 375 26.0000000 6.59405 74.6% 2.6 0s H 732 455 25.0000000 6.91962 72.3% 2.6 0s Explored 34962 nodes (95285 simplex iterations) in 3.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.500000000000e+01, best bound 2.500000000000e+01, gap 0.0%