```uclid
module mutual_exclusion_protocol
{
  // Variables definition
  type pid_t = boolean;
  const p0 : pid_t = false;
  const p1 : pid_t = true;

  var s : pid_t;
  var y0 : boolean;
  var y1 : boolean;

  // Initial state
  init {
    s = p0;
    y0 = false;
    y1 = false;
  }

  // Transition relation
  next {
    case
      // Process P0 action
      :: true ->
        case
          // Noncritical section
          :: true ->
            y0' = true;
            s'  = p0;

          // Enter critical section
          :: (y1 = false || s != p0) ->
            y0' = false;
            s' = s;
        esac;

      // Process P1 action
      :: true ->
        case
          // Noncritical section
          :: true ->
            y1' = true;
            s'  = p1;

          // Enter critical section
          :: (y0 = false || s != p1) ->
            y1' = false;
            s' = s;
        esac;
    esac
  }

  // Safety property to check mutual exclusion
  // Check that both cannot be in the critical section simultaneously
  property mutual_exclusion {
    !((y0 = true && y1 = true) && (s = p0 && s = p1))
  }

  // Liveness property to ensure starvation freedom
  // Check that if one process wishes to enter critical section, it eventually does
  property starvation_freedom_P0 {
    always (eventually (y0 = true) -> eventually (s = p0 and y0 = false));
  }

  property starvation_freedom_P1 {
    always (eventually (y1 = true) -> eventually (s = p1 and y1 = false));
  }

  // Control procedure
  control {
    check;
    print_results;
  }
}
```

This revised code changes `model` to `module` following the UCLID5 syntax, accommodating the feedback reported by the compiler.