Please assess the completion status of the following clinical trial:

Trial Title: The Effect of Vildagliptin Based Treatment Versus Sulfonylurea on Glycemic Variability, Oxidative Stress, GLP-1, and Endothelial Function in Patients With Type 2 Diabetes

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Type 2 diabetic patients with hemoglobin A1c levels within the range 7% - 10%

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 70 Years
- Healthy Volunteers: f

Study Arms:
- Vildagliptin + Metformin (Type: EXPERIMENTAL): Adding Vildagliptin to metformin users
- Glimepiride + Metformin (Type: ACTIVE_COMPARATOR): Adding Glimepiride to metformin users

Based on this trial design, predict the completion outcome and termination type (if applicable).