Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:45:36 2012 Optimize a model with 1 rows, 46 columns and 46 nonzeros Model has 94 quadratic objective terms Presolve time: 0.00s Presolved: 95 rows, 140 columns, 328 nonzeros Variable types: 0 continuous, 140 integer (140 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 0.000000e+00, 108 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 40 36.00000 0.00000 100% - 0s 0 0 0.00000 0 46 36.00000 0.00000 100% - 0s H 0 0 35.0000000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s 0 0 0.00000 0 39 33.00000 0.00000 100% - 0s 0 0 0.00000 0 32 33.00000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 31.00000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s 0 0 0.00000 0 57 28.00000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 27.00000 0.00000 100% - 0s 0 0 0.00000 0 29 27.00000 0.00000 100% - 0s 0 0 0.00000 0 29 27.00000 0.00000 100% - 0s 0 2 0.00000 0 29 27.00000 0.00000 100% - 0s H 146 108 24.0000000 0.00000 100% 6.1 0s H 216 114 21.0000000 1.00000 95.2% 7.6 0s * 228 105 15 20.0000000 1.00000 95.0% 7.5 0s * 539 72 14 19.0000000 9.50000 50.0% 15.5 0s H 642 22 18.0000000 15.00000 16.7% 16.3 0s Cutting planes: Cover: 182 MIR: 11 Zero half: 7 Explored 667 nodes (11216 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%