Please assess the completion status of the following clinical trial:

Trial Title: Roflumilast and Cognition

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: BASIC_SCIENCE
- Time Perspective: None
- Masking: TRIPLE
- Phase: PHASE2
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* 18 to 35 years of age~* Healthy (i.e. absence of all exclusion criteria), normal static binocular acuity (corrected or uncorrected),~* Body mass index between 18.5 and 30~* Willingness to sign an informed consent.~* Positive evaluation on the memory screening~Exclusion Criteria:~* History of cardiac, hepatic, renal, pulmonary, neurological, gastrointestinal, haematological, or psychiatric illness~* First-degree relative with psychiatric disorder (in particular major depressive disorder and suicidality)~* Excessive drinking (\>20 glasses of alcohol containing beverages per week)~* Pregnancy or lactation~* Use of chronic medication other than oral contraceptives~* Use of recreational drugs in the 2 weeks preceding participation~* Smoking~* Orthostatic hypotension~* Lactose intolerance~* Sensory or motor deficits which could reasonably be expected to affect test performance

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 35 Years
- Healthy Volunteers: t

Study Arms:
- roflumilast 100ug (Type: EXPERIMENTAL): None
- roflumilast 300ug (Type: EXPERIMENTAL): None
- roflumilast1000ug (Type: EXPERIMENTAL): None
- placebo (Type: PLACEBO_COMPARATOR): None

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