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use regex instead of head/tail split for string-integer conversion; check sort of refreshed vars; add intersection difficulty estimation

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Murphy Berzish 2018-01-26 14:52:18 -05:00
parent c01dda4e31
commit 1ee5ce96b8
2 changed files with 18 additions and 9 deletions
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src/smt/theory_str.h
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@ -555,6 +555,7 @@ protected:
// regex automata and length-aware regex
unsigned estimate_regex_complexity(expr * re);
unsigned estimate_regex_complexity_under_complement(expr * re);
unsigned estimate_automata_intersection_difficulty(eautomaton * aut1, eautomaton * aut2);
bool check_regex_length_linearity(expr * re);
bool check_regex_length_linearity_helper(expr * re, bool already_star);
expr_ref infer_all_regex_lengths(expr * lenVar, expr * re, expr_ref_vector & freeVariables);