Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:27 2012 Optimize a model with 379 rows, 123 columns and 758 nonzeros Presolve removed 96 rows and 12 columns Presolve time: 0.00s Presolved: 283 rows, 111 columns, 597 nonzeros Variable types: 0 continuous, 111 integer (111 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 5.450000e+01, 161 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 93 46.00000 54.50000 18.5% - 0s 0 0 53.45833 0 106 46.00000 53.45833 16.2% - 0s H 0 0 48.0000000 53.45833 11.4% - 0s 0 0 52.33333 0 100 48.00000 52.33333 9.03% - 0s 0 0 52.06667 0 109 48.00000 52.06667 8.47% - 0s 0 0 51.69231 0 107 48.00000 51.69231 7.69% - 0s 0 0 51.38750 0 109 48.00000 51.38750 7.06% - 0s 0 0 51.26316 0 108 48.00000 51.26316 6.80% - 0s 0 0 51.13043 0 109 48.00000 51.13043 6.52% - 0s 0 0 51.12500 0 109 48.00000 51.12500 6.51% - 0s 0 0 51.12500 0 105 48.00000 51.12500 6.51% - 0s H 0 0 49.0000000 51.12500 4.34% - 0s 0 2 51.12500 0 105 49.00000 51.12500 4.34% - 0s Cutting planes: Gomory: 1 Zero half: 63 Explored 29 nodes (1473 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%