Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:52:37 2012 Optimize a model with 3032 rows, 111 columns and 6064 nonzeros Presolve removed 2178 rows and 0 columns Presolve time: 0.09s Presolved: 854 rows, 111 columns, 5701 nonzeros Variable types: 0 continuous, 111 integer (111 binary) Found heuristic solution: objective 8.0000000 Root relaxation: objective 1.528638e+01, 388 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 15.28638 0 102 8.00000 15.28638 91.1% - 0s 0 0 14.74147 0 109 8.00000 14.74147 84.3% - 0s 0 0 14.66216 0 109 8.00000 14.66216 83.3% - 0s 0 0 14.63063 0 109 8.00000 14.63063 82.9% - 0s H 0 0 9.0000000 14.63063 62.6% - 0s 0 0 14.62172 0 109 9.00000 14.62172 62.5% - 0s 0 0 14.61583 0 110 9.00000 14.61583 62.4% - 0s 0 0 14.61355 0 110 9.00000 14.61355 62.4% - 1s 0 0 14.61355 0 110 9.00000 14.61355 62.4% - 1s 0 2 14.61309 0 110 9.00000 14.61309 62.4% - 1s Cutting planes: Clique: 88 Zero half: 1 Explored 379 nodes (22903 simplex iterations) in 2.84 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%