Class: Lernen::Equiv::TestWordsOracle

Inherits:
Oracle
  • Object
show all
Defined in:
lib/lernen/equiv/test_words_oracle.rb

Overview

TestWordsOracle provides an implementation of equivalence query that find a counterexample from the given words.

Instance Attribute Summary

Attributes inherited from Oracle

#sul

Instance Method Summary collapse

Methods inherited from Oracle

#+, #stats

Constructor Details

#initialize(words, sul) ⇒ TestWordsOracle

: (Array[Array] words, System::SUL[In, Out] sul) -> void



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# File 'lib/lernen/equiv/test_words_oracle.rb', line 15

def initialize(words, sul)
  super(sul)

  @words = words
end

Instance Method Details

#find_cex(hypothesis) ⇒ Object 



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# File 'lib/lernen/equiv/test_words_oracle.rb', line 22

def find_cex(hypothesis)
  super

  @words.each do |word|
    reset_internal(hypothesis)

    word.each_with_index do |input, index|
      hypothesis_output, sul_output = step_internal(hypothesis, input)

      if hypothesis_output != sul_output # steep:ignore
        @sul.shutdown
        return word[0..index]
      end
    end
  end

  nil
end