Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:24:39 2012 Optimize a model with 1 rows, 143 columns and 143 nonzeros Model has 112 quadratic objective terms Presolve removed 0 rows and 31 columns Presolve time: 0.00s Presolved: 113 rows, 224 columns, 448 nonzeros Variable types: 0 continuous, 224 integer (223 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 0.000000e+00, 144 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 14 28.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 12.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 9 10.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 8.00000 0.00000 100% - 0s H 0 0 6.0000000 0.00000 100% - 0s 0 0 0.00000 0 8 6.00000 0.00000 100% - 0s 0 0 0.00000 0 10 6.00000 0.00000 100% - 0s 0 0 0.00000 0 8 6.00000 0.00000 100% - 0s 0 0 0.00000 0 12 6.00000 0.00000 100% - 0s 0 0 0.00000 0 12 6.00000 0.00000 100% - 0s 0 2 0.00000 0 8 6.00000 0.00000 100% - 0s H 139 27 4.0000000 0.00000 100% 2.3 0s H 142 21 3.0000000 0.00000 100% 2.4 0s Cutting planes: Cover: 200 Explored 494 nodes (4787 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%