Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:06 2012 Optimize a model with 224 rows, 91 columns and 448 nonzeros Presolve removed 53 rows and 8 columns Presolve time: 0.00s Presolved: 171 rows, 83 columns, 363 nonzeros Variable types: 0 continuous, 83 integer (83 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 4.100000e+01, 113 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.00000 0 56 37.00000 41.00000 10.8% - 0s 0 0 39.83333 0 73 37.00000 39.83333 7.66% - 0s H 0 0 38.0000000 39.83333 4.82% - 0s 0 0 39.00000 0 52 38.00000 39.00000 2.63% - 0s 0 0 39.00000 0 64 38.00000 39.00000 2.63% - 0s 0 0 cutoff 0 38.00000 38.99996 2.63% - 0s Cutting planes: Gomory: 1 Zero half: 32 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 3.800000000000e+01, best bound 3.800000000000e+01, gap 0.0%