Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:32 2012 Optimize a model with 394 rows, 126 columns and 788 nonzeros Presolve removed 71 rows and 0 columns Presolve time: 0.00s Presolved: 323 rows, 126 columns, 689 nonzeros Variable types: 0 continuous, 126 integer (126 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 5.500000e+01, 193 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55.00000 0 86 47.00000 55.00000 17.0% - 0s 0 0 53.60526 0 124 47.00000 53.60526 14.1% - 0s H 0 0 48.0000000 53.60526 11.7% - 0s 0 0 53.15385 0 122 48.00000 53.15385 10.7% - 0s 0 0 52.76000 0 120 48.00000 52.76000 9.92% - 0s 0 0 52.55644 0 125 48.00000 52.55644 9.49% - 0s 0 0 52.21965 0 126 48.00000 52.21965 8.79% - 0s H 0 0 49.0000000 52.21965 6.57% - 0s 0 0 52.15176 0 123 49.00000 52.15176 6.43% - 0s 0 0 52.10561 0 124 49.00000 52.10561 6.34% - 0s H 0 0 50.0000000 52.10561 4.21% - 0s 0 0 52.05898 0 126 50.00000 52.05898 4.12% - 0s 0 0 52.05401 0 126 50.00000 52.05401 4.11% - 0s 0 0 52.05401 0 125 50.00000 52.05401 4.11% - 0s 0 2 52.05217 0 125 50.00000 52.05217 4.10% - 0s * 5 1 3 51.0000000 52.05217 2.06% 28.4 0s Cutting planes: Zero half: 37 Explored 7 nodes (915 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%