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We need to always remove quotes before accessing the variable cache. Otherwise, duplicate variables will be created for "|var|" and "var"
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Hello,
our CVC5 parsing code has an issue that allows duplicate versions of the same variable to be created. The problem is that quotes are not removed from symbols when looking them up in the variable cache. Because of a new variable may be created when looking up a quoted symbol, even though the variable already exists without the quotes