Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:51 2012 Optimize a model with 350 rows, 83 columns and 700 nonzeros Presolve removed 132 rows and 1 columns Presolve time: 0.00s Presolved: 218 rows, 82 columns, 525 nonzeros Variable types: 0 continuous, 82 integer (82 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.000000e+01, 138 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 30.00000 0 66 27.00000 30.00000 11.1% - 0s H 0 0 28.0000000 30.00000 7.14% - 0s 0 0 29.54545 0 72 28.00000 29.54545 5.52% - 0s 0 0 29.33929 0 76 28.00000 29.33929 4.78% - 0s 0 0 29.11538 0 70 28.00000 29.11538 3.98% - 0s 0 0 cutoff 0 28.00000 28.99997 3.57% - 0s Cutting planes: Gomory: 2 Clique: 1 Zero half: 28 Explored 0 nodes (302 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%