Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:09 2012 Optimize a model with 246 rows, 99 columns and 492 nonzeros Presolve removed 47 rows and 6 columns Presolve time: 0.00s Presolved: 199 rows, 93 columns, 415 nonzeros Variable types: 0 continuous, 93 integer (93 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 4.450000e+01, 131 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44.50000 0 73 35.00000 44.50000 27.1% - 0s H 0 0 38.0000000 44.50000 17.1% - 0s H 0 0 39.0000000 44.50000 14.1% - 0s 0 0 43.00000 0 79 39.00000 43.00000 10.3% - 0s H 0 0 41.0000000 43.00000 4.88% - 0s 0 0 42.66667 0 79 41.00000 42.66667 4.07% - 0s 0 0 42.43750 0 90 41.00000 42.43750 3.51% - 0s 0 0 42.00000 0 83 41.00000 42.00000 2.44% - 0s 0 0 cutoff 0 41.00000 41.99996 2.44% - 0s Cutting planes: Clique: 1 Zero half: 40 Explored 0 nodes (353 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.100000000000e+01, best bound 4.100000000000e+01, gap 0.0%