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One more case for ule_constraint::is_always_false

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Jakob Rath 2022-09-29 18:22:31 +02:00
parent 6218931dde
commit 8242069ba6
3 changed files with 6 additions and 2 deletions
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src/math/dd/dd_pdd.h
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@ -253,6 +253,7 @@ namespace dd {
inline bool is_val(PDD p) const { return m_nodes[p].is_val(); }
inline bool is_internal(PDD p) const { return m_nodes[p].is_internal(); }
inline bool is_var(PDD p) const { return !is_val(p) && is_zero(lo(p)) && is_one(hi(p)); }
inline bool is_max(PDD p) const { SASSERT(m_semantics == mod2_e || m_semantics == mod2N_e); return is_val(p) && val(p) == max_value(); }
bool is_never_zero(PDD p);
inline unsigned level(PDD p) const { return m_nodes[p].m_level; }
inline unsigned var(PDD p) const { return m_level2var[level(p)]; }
@ -413,6 +414,7 @@ namespace dd {
bool is_zero() const { return m.is_zero(root); }
bool is_linear() const { return m.is_linear(root); }
bool is_var() const { return m.is_var(root); }
bool is_max() const { return m.is_max(root); }
/** Polynomial is of the form a * x + b for numerals a, b. */
bool is_unilinear() const { return !is_val() && lo().is_val() && hi().is_val(); }
bool is_unary() const { return !is_val() && lo().is_zero() && hi().is_val(); }