Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:04:28 2012 Optimize a model with 1 rows, 26 columns and 26 nonzeros Model has 173 quadratic objective terms Modified 26 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 26 columns, 26 nonzeros Presolved model has 199 quadratic objective terms Variable types: 0 continuous, 26 integer (26 binary) Found heuristic solution: objective 90.0000000 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 26 90.00000 0.00000 100% - 0s H 0 0 87.0000000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s 0 2 3.36790 0 26 83.00000 3.36790 95.9% - 0s H 54 45 80.0000000 7.30428 90.9% 2.0 0s H 55 44 74.0000000 7.30428 90.1% 2.0 0s H 98 77 73.0000000 10.96832 85.0% 2.0 0s H 513 355 72.0000000 16.66167 76.9% 2.0 0s H 607 417 71.0000000 17.44494 75.4% 2.0 0s H 610 398 70.0000000 17.44494 75.1% 2.0 0s H 707 417 69.0000000 17.44494 74.7% 2.1 0s H 7935 3467 68.0000000 37.88760 44.3% 2.0 0s 77794 19509 64.47962 28 9 68.00000 51.99649 23.5% 2.0 5s 158640 24109 61.49585 28 9 68.00000 56.84661 16.4% 2.0 10s 235698 16472 66.00157 28 9 68.00000 60.44168 11.1% 2.0 15s Explored 284711 nodes (572245 simplex iterations) in 17.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.800000000000e+01, best bound 6.800000000000e+01, gap 0.0%