Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:43:46 2012 Optimize a model with 1 rows, 176 columns and 176 nonzeros Model has 168 quadratic objective terms Presolve removed 0 rows and 20 columns Presolve time: 0.00s Presolved: 169 rows, 324 columns, 660 nonzeros Variable types: 0 continuous, 324 integer (323 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 223 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 51 43.00000 0.00000 100% - 0s 0 0 0.00000 0 31 43.00000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s 0 0 0.00000 0 35 26.00000 0.00000 100% - 0s 0 0 0.00000 0 33 26.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 2 0.00000 0 31 19.00000 0.00000 100% - 0s H 323 274 17.0000000 0.00000 100% 5.4 0s H 353 267 16.0000000 0.00000 100% 5.5 0s H 359 257 15.0000000 0.00000 100% 5.6 0s H 360 243 14.0000000 0.00000 100% 5.6 0s H 367 241 13.0000000 0.00000 100% 5.6 0s H 409 247 12.0000000 0.00000 100% 6.1 0s H 437 158 8.0000000 0.00000 100% 6.9 0s H 517 182 7.0000000 0.00000 100% 7.8 0s H 582 161 6.0000000 0.00000 100% 9.1 0s * 607 138 14 5.0000000 0.49275 90.1% 9.7 0s Cutting planes: Cover: 288 Explored 780 nodes (17774 simplex iterations) in 0.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+00, best bound 5.000000000000e+00, gap 0.0%