Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:59:46 2012 Optimize a model with 1 rows, 25 columns and 25 nonzeros Model has 151 quadratic objective terms Modified 25 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 25 columns, 25 nonzeros Presolved model has 176 quadratic objective terms Variable types: 0 continuous, 25 integer (25 binary) Found heuristic solution: objective 74.0000000 Root relaxation: objective 0.000000e+00, 27 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 25 74.00000 0.00000 100% - 0s H 0 0 69.0000000 0.00000 100% - 0s H 0 0 64.0000000 0.00000 100% - 0s H 0 0 63.0000000 0.00000 100% - 0s 0 2 2.87352 0 25 63.00000 2.87352 95.4% - 0s H 150 112 62.0000000 10.44127 83.2% 2.0 0s H 214 159 61.0000000 10.73857 82.4% 2.0 0s H 959 515 60.0000000 20.11822 66.5% 2.1 0s 106111 13506 57.44004 29 8 60.00000 51.26403 14.6% 2.0 5s Explored 161301 nodes (325349 simplex iterations) in 7.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%