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Merge pull request #1396 from mtrberzi/substr-bug

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Fix incorrect term in theory_str str.substr reduction
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Nikolaj Bjorner 2017-12-11 12:36:07 -08:00 • committed by GitHub
commit 82c26509ae
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src/smt/theory_str.cpp
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@ -1450,7 +1450,7 @@ namespace smt {
// pos < strlen(base)
// --> pos + -1*strlen(base) < 0
argumentsValid_terms.push_back(mk_not(m, m_autil.mk_ge(
m_autil.mk_add(substrPos, m_autil.mk_mul(minusOne, substrLen)),
m_autil.mk_add(substrPos, m_autil.mk_mul(minusOne, mk_strlen(substrBase))),
zero)));
// len >= 0