Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:37:42 2012 Optimize a model with 1 rows, 170 columns and 170 nonzeros Model has 146 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 147 rows, 290 columns, 582 nonzeros Variable types: 0 continuous, 290 integer (289 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 0.000000e+00, 187 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 45 45.00000 0.00000 100% - 0s 0 0 0.00000 0 33 45.00000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s 0 0 0.00000 0 37 40.00000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 18.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 10.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 12 9.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 8.00000 0.00000 100% - 0s 0 0 0.00000 0 13 8.00000 0.00000 100% - 0s 0 2 0.00000 0 13 8.00000 0.00000 100% - 0s H 54 36 7.0000000 0.00000 100% 1.8 0s H 353 170 6.0000000 0.00000 100% 4.8 0s H 518 160 4.0000000 0.00000 100% 7.1 0s Cutting planes: Cover: 272 MIR: 2 Explored 772 nodes (19225 simplex iterations) in 0.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%