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fix empty vector edge case in binary search

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This commit is contained in:
Murphy Berzish 2016-12-22 19:33:38 -05:00
parent 2dc9b486d3
commit 0a6c23148f
1 changed files with 1 additions and 1 deletions
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src/smt/theory_str.cpp
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@ -9229,7 +9229,7 @@ expr_ref theory_str::binary_search_case_split(expr * freeVar, expr * tester, bin
expr * theory_str::binary_search_length_test(expr * freeVar, expr * previousLenTester, std::string previousLenTesterValue) {
ast_manager & m = get_manager();
if (binary_search_len_tester_stack.contains(freeVar)) {
if (binary_search_len_tester_stack.contains(freeVar) && !binary_search_len_tester_stack[freeVar].empty()) {
TRACE("t_str_binary_search", tout << "checking existing length testers for " << mk_pp(freeVar, m) << std::endl;
for (ptr_vector<expr>::const_iterator it = binary_search_len_tester_stack[freeVar].begin();
it != binary_search_len_tester_stack[freeVar].end(); ++it) {