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enable more simplification in case inequality triggers a change.

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This commit is contained in:
Nikolaj Bjorner 2023-10-21 19:58:39 -07:00
parent 4e21e126a8
commit 8fac89cdcc
5 changed files with 63 additions and 7 deletions
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27
src/ast/simplifiers/then_simplifier.h
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@ -51,6 +51,10 @@ class then_simplifier : public dependent_expr_simplifier {
}
};
protected:
bool m_bail_on_no_change = false;
public:
then_simplifier(ast_manager& m, params_ref const& p, dependent_expr_state& fmls):
@ -72,9 +76,17 @@ public:
break;
s->reset_statistics();
collect_stats _cs(*s);
s->reduce();
m_fmls.flatten_suffix();
m_fmls.reset_updated();
try {
s->reduce();
m_fmls.flatten_suffix();
}
catch (rewriter_exception &) {
break;
}
TRACE("simplifier", tout << s->name() << "\n" << m_fmls);
if (m_bail_on_no_change && !m_fmls.updated())
break;
}
}
@ -108,3 +120,14 @@ public:
s->pop(n);
}
};
class if_change_simplifier : public then_simplifier {
public:
if_change_simplifier(ast_manager& m, params_ref const& p, dependent_expr_state& fmls):
then_simplifier(m, p, fmls) {
m_bail_on_no_change = true;
}
char const* name() const override { return "if-change-then"; }
};