Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:22:46 2012 Optimize a model with 1 rows, 135 columns and 135 nonzeros Model has 108 quadratic objective terms Presolve removed 0 rows and 25 columns Presolve time: 0.00s Presolved: 109 rows, 218 columns, 434 nonzeros Variable types: 0 continuous, 218 integer (217 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 0.000000e+00, 142 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 24.00000 0.00000 100% - 0s 0 0 0.00000 0 17 24.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 14.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 12.00000 0.00000 100% - 0s 0 0 0.00000 0 18 12.00000 0.00000 100% - 0s 0 0 0.00000 0 9 12.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 7.00000 0.00000 100% - 0s 0 0 0.00000 0 13 7.00000 0.00000 100% - 0s 0 2 0.00000 0 13 7.00000 0.00000 100% - 0s H 54 34 6.0000000 0.00000 100% 1.8 0s H 108 39 5.0000000 0.00000 100% 2.3 0s H 437 60 3.0000000 0.00000 100% 5.4 0s * 506 30 14 2.0000000 0.00000 100% 7.1 0s Cutting planes: Cover: 186 Explored 538 nodes (5411 simplex iterations) in 0.13 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%