Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:35:55 2012 Optimize a model with 1 rows, 166 columns and 166 nonzeros Model has 157 quadratic objective terms Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 158 rows, 305 columns, 619 nonzeros Variable types: 0 continuous, 305 integer (304 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 0.000000e+00, 211 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 42.00000 0.00000 100% - 0s 0 0 0.00000 0 40 42.00000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s 0 0 0.00000 0 41 26.00000 0.00000 100% - 0s 0 0 0.00000 0 18 26.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 2 0.00000 0 18 15.00000 0.00000 100% - 0s H 109 94 14.0000000 0.00000 100% 2.6 0s H 205 158 12.0000000 0.00000 100% 3.7 0s * 211 149 33 11.0000000 0.00000 100% 3.6 0s H 516 279 9.0000000 0.00000 100% 6.6 0s H 543 256 8.0000000 0.00000 100% 7.2 0s * 657 255 23 7.0000000 0.27273 96.1% 9.3 0s H 684 140 5.0000000 0.87500 82.5% 10.2 0s Cutting planes: Cover: 298 Explored 840 nodes (19066 simplex iterations) in 0.37 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+00, best bound 5.000000000000e+00, gap 0.0%