Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:24:23 2012 Optimize a model with 1 rows, 142 columns and 142 nonzeros Model has 110 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 111 rows, 226 columns, 446 nonzeros Variable types: 0 continuous, 226 integer (225 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 0.000000e+00, 135 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 31 27.00000 0.00000 100% - 0s 0 0 0.00000 0 19 27.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 16.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 14.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 11.00000 0.00000 100% - 0s 0 0 0.00000 0 14 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 2 0.00000 0 14 10.00000 0.00000 100% - 0s H 54 38 9.0000000 0.00000 100% 1.9 0s H 81 51 7.0000000 0.00000 100% 2.1 0s H 185 69 4.0000000 0.00000 100% 3.5 0s H 190 27 2.0000000 0.00000 100% 4.0 0s Cutting planes: Cover: 191 Explored 336 nodes (4459 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%