Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:43:16 2012 Optimize a model with 1 rows, 44 columns and 44 nonzeros Model has 101 quadratic objective terms Modified 42 Q diagonals Presolve removed 0 rows and 1 columns Presolve time: 0.01s Presolved: 1 rows, 43 columns, 43 nonzeros Presolved model has 143 quadratic objective terms Variable types: 0 continuous, 43 integer (42 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 0.000000e+00, 46 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 42 54.00000 0.00000 100% - 0s H 0 0 46.0000000 0.00000 100% - 0s H 0 0 36.0000000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s H 0 0 29.0000000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 2 0.00000 0 42 25.00000 0.00000 100% - 0s H 486 350 24.0000000 6.09368 74.6% 2.7 0s H 675 457 23.0000000 6.14910 73.3% 2.8 0s Explored 43995 nodes (111469 simplex iterations) in 3.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%