Please assess the completion status of the following clinical trial:

Trial Title: Efficacy of 2-Liter Mixed Preparation With Bisacodyl Plus Polyethylene Glycol and 4-Liter Polyethylene Glycol for Colon Cleansing in Patients With Prior History of Colorectal Resection

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

Eligibility Criteria:
Inclusion Criteria:~1. Outpatients~2. ≥18 yrs old,~3. Prior history of colorectal resection due to colo-rectal cancer, referred for surveillance colonoscopy~Exclusion Criteria:~1. Inpatients~2. Emergency Colonoscopy~3. Comorbidities: Congestive heart failure, history of kidney disease, history of solid organ transplant~4. Pregnant and/or lactating women

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- bisacodyl plus 2-Liter Polyethylene glycol (Type: ACTIVE_COMPARATOR): Patients randomized to the low-volume arm, will be invited to consume 2 sachets of Lovol-esse (Polyethylene glycol) in one liter of water at 8:00 PM the evening before the colonoscopy and 2 sachets in one liter of water 4 hours before their scheduled colonoscopy appointment; furthermore, the patients will be instructed to take three 5-mg tablets of bisacodyl the day before the procedure, at 5:00 PM.
- 4-Liter Polyethylene glycol (Type: ACTIVE_COMPARATOR): Patients assigned to the high-volume arm will be invited to consume 2 envelopes of Selg-esse 1000 (polyethylene glycol) in 2 litres of water and drink the resulting solution in about 2-3 hours starting at 6:00 PM the evening before the colonoscopy; the day of the procedure, starting 5 hours before the procedure, the patients will be invited to complete the preparation with 2 others envelopes of Selg-esse 1000 (polyethylene glycol) dissolved in 2 litres of water.

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