Use of non-determinism

• Inputs from environment

  • Altitude := {1000…8000}

• Simplification of functions

  • Alt_Rate := 0.25*(Alt_Baro-ZP)/Delta_t
  • Alt_Rate := {-2000…2000}

• Unmodelled parts of specification

  • States of Other_Aircraft treated as non-determinstic input variables

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