Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:34 2012 Optimize a model with 405 rows, 127 columns and 810 nonzeros Presolve removed 66 rows and 2 columns Presolve time: 0.00s Presolved: 339 rows, 125 columns, 716 nonzeros Variable types: 0 continuous, 125 integer (125 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.450000e+01, 199 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 54.50000 0 77 46.00000 54.50000 18.5% - 0s 0 0 53.50000 0 113 46.00000 53.50000 16.3% - 0s 0 0 53.50000 0 113 46.00000 53.50000 16.3% - 0s H 0 0 47.0000000 53.50000 13.8% - 0s 0 0 53.24242 0 122 47.00000 53.24242 13.3% - 0s H 0 0 48.0000000 53.24242 10.9% - 0s 0 0 52.88889 0 114 48.00000 52.88889 10.2% - 0s 0 0 52.83333 0 114 48.00000 52.83333 10.1% - 0s H 0 0 49.0000000 52.83333 7.82% - 0s H 0 0 50.0000000 52.83333 5.67% - 0s 0 0 52.64000 0 120 50.00000 52.64000 5.28% - 0s 0 0 52.52800 0 123 50.00000 52.52800 5.06% - 0s 0 0 52.48619 0 123 50.00000 52.48619 4.97% - 0s 0 0 52.47558 0 122 50.00000 52.47558 4.95% - 0s 0 0 52.44724 0 122 50.00000 52.44724 4.89% - 0s 0 0 52.39307 0 123 50.00000 52.39307 4.79% - 0s 0 0 52.38976 0 123 50.00000 52.38976 4.78% - 0s 0 0 52.38976 0 120 50.00000 52.38976 4.78% - 0s 0 2 52.38976 0 120 50.00000 52.38976 4.78% - 0s Cutting planes: Gomory: 2 Zero half: 68 Explored 45 nodes (2381 simplex iterations) in 0.13 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%