Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:40:44 2012 Optimize a model with 1 rows, 172 columns and 172 nonzeros Model has 137 quadratic objective terms Presolve removed 0 rows and 34 columns Presolve time: 0.00s Presolved: 138 rows, 275 columns, 549 nonzeros Variable types: 0 continuous, 275 integer (274 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 0.000000e+00, 175 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 30 35.00000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 30.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 17.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 8.00000 0.00000 100% - 0s 0 0 0.00000 0 10 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 7 6.00000 0.00000 100% - 0s 0 0 0.00000 0 8 6.00000 0.00000 100% - 0s 0 0 0.00000 0 8 6.00000 0.00000 100% - 0s H 0 0 5.0000000 0.00000 100% - 0s 0 2 0.00000 0 8 5.00000 0.00000 100% - 0s H 27 13 3.0000000 0.00000 100% 2.4 0s * 414 50 29 2.0000000 0.00000 100% 7.2 0s Cutting planes: Cover: 226 Explored 472 nodes (5345 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%