Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:36:53 2012 Optimize a model with 1 rows, 168 columns and 168 nonzeros Model has 141 quadratic objective terms Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 142 rows, 281 columns, 563 nonzeros Variable types: 0 continuous, 281 integer (280 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 0.000000e+00, 169 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 38 36.00000 0.00000 100% - 0s 0 0 0.00000 0 22 36.00000 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 24 16.00000 0.00000 100% - 0s 0 0 0.00000 0 21 16.00000 0.00000 100% - 0s 0 0 0.00000 0 19 16.00000 0.00000 100% - 0s 0 0 0.00000 0 11 16.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 8.00000 0.00000 100% - 0s 0 0 0.00000 0 14 8.00000 0.00000 100% - 0s 0 2 0.00000 0 14 8.00000 0.00000 100% - 0s H 27 27 7.0000000 0.00000 100% 2.0 0s H 81 46 6.0000000 0.00000 100% 2.5 0s * 256 105 12 5.0000000 0.00000 100% 8.3 0s H 283 45 3.0000000 0.00000 100% 8.2 0s Cutting planes: Cover: 242 Explored 430 nodes (9755 simplex iterations) in 0.18 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%