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Merge pull request #6483 from ethereum/smt_support_mod

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[SMTChecker] Support mod
This commit is contained in:
chriseth
2019-04-15 13:42:18 +02:00
committed by GitHub
parent 73ac8f6220 af9f16e014
commit bf5792f7ca
6 changed files with 55 additions and 4 deletions
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libsolidity/formal/SMTChecker.cpp
+8 -4
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@@ -341,7 +341,8 @@ void SMTChecker::endVisit(Assignment const& _assignment)
{Token::AssignAdd, Token::Add},
{Token::AssignSub, Token::Sub},
{Token::AssignMul, Token::Mul},
{Token::AssignDiv, Token::Div}
{Token::AssignDiv, Token::Div},
{Token::AssignMod, Token::Mod}
};
Token op = _assignment.assignmentOperator();
if (op != Token::Assign && !compoundToArithmetic.count(op))
@@ -1035,6 +1036,7 @@ void SMTChecker::arithmeticOperation(BinaryOperation const& _op)
case Token::Sub:
case Token::Mul:
case Token::Div:
case Token::Mod:
{
defineExpr(_op, arithmeticOperation(
_op.getOperator(),
@@ -1065,7 +1067,8 @@ smt::Expression SMTChecker::arithmeticOperation(
Token::Add,
Token::Sub,
Token::Mul,
Token::Div
Token::Div,
Token::Mod
};
solAssert(validOperators.count(_op), "");
solAssert(_commonType, "");
@@ -1076,10 +1079,11 @@ smt::Expression SMTChecker::arithmeticOperation(
_op == Token::Add ? _left + _right :
_op == Token::Sub ? _left - _right :
_op == Token::Div ? division(_left, _right, intType) :
/*op == Token::Mul*/ _left * _right
_op == Token::Mul ? _left * _right :
/*_op == Token::Mod*/ _left % _right
);
if (_op == Token::Div)
if (_op == Token::Div || _op == Token::Mod)
{
checkCondition(_right == 0, _location, "Division by zero", "<result>", &_right);
m_interface->addAssertion(_right != 0);