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Implement => for boolean equality.

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chriseth 2022-06-01 13:23:43 +02:00
parent 57c6c529d0
commit 9078ed8afd
1 changed files with 6 additions and 0 deletions
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6
libsolutil/BooleanLP.cpp
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@ -779,6 +779,12 @@ void BooleanLPSolver::addBooleanEquality(Literal const& _left, smtutil::Expressi
state().clauses.emplace_back(Clause{vector<Literal>{_left, negate(a)}});
state().clauses.emplace_back(Clause{vector<Literal>{_left, negate(b)}});
}
else if (_right.name == "=>")
{
solAssert(_right.arguments.size() == 2);
// a = (x => y) <=> a = or(-x, y)
addBooleanEquality(_left, !_right.arguments.at(0) || _right.arguments.at(1), move(_letBindings));
}
else if (_right.name == "=")
{
// l = eq(a, b) <=> (-l or -a or b) and (-l or a or -b) and (l or -a or -b) and (l or a or b)