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Z3str3: Add consistency checks for string-integer conversion terms in model construction (#4551)

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* z3str3: check consistency of str.to_int in fixed length solver

* z3str3: add similar check for int.to_str as well

* z3str3: refactor string-integer conversion check and add post checks for model construction
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Murphy Berzish 2020-06-30 11:20:44 -05:00 • committed by GitHub
parent 8fda4f904d
commit fce1252145
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3 changed files with 199 additions and 35 deletions
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src/smt/theory_str.h
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@ -753,6 +753,7 @@ protected:
bool finalcheck_str2int(app * a);
bool finalcheck_int2str(app * a);
bool string_integer_conversion_valid(zstring str, rational& converted) const;
lbool fixed_length_model_construction(expr_ref_vector formulas, expr_ref_vector &precondition,
expr_ref_vector& free_variables,