The algorithm hence focuses on misalignments: It trusts the quality of 1:1 alignments (which are further verified with a bilingual dictionary) and searches for MWEs exactly in the areas that word alignment failed to properly align, not relying on the alignment in these cases.
the algorithm views all words that are not included in 1:1 alignments as potential areas in which to search for MWEs, independently of how these words were aligned by the word-aligner.