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[SMTChecker] Support array length

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This commit is contained in:
Leonardo Alt
2020-05-14 23:32:29 +02:00
parent 7be4744341
commit a0c605aa85
44 changed files with 548 additions and 119 deletions
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libsolidity/formal/SymbolicVariables.cpp
+71 -40
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@@ -86,6 +86,12 @@ smt::Expression SymbolicVariable::resetIndex()
return currentValue();
}
smt::Expression SymbolicVariable::setIndex(unsigned _index)
{
m_ssa->setIndex(_index);
return currentValue();
}
smt::Expression SymbolicVariable::increaseIndex()
{
++(*m_ssa);
@@ -179,6 +185,12 @@ smt::Expression SymbolicFunctionVariable::resetIndex()
return m_abstract.resetIndex();
}
smt::Expression SymbolicFunctionVariable::setIndex(unsigned _index)
{
SymbolicVariable::setIndex(_index);
return m_abstract.setIndex(_index);
}
smt::Expression SymbolicFunctionVariable::increaseIndex()
{
++(*m_ssa);
@@ -197,46 +209,6 @@ void SymbolicFunctionVariable::resetDeclaration()
m_declaration = m_context.newVariable(currentName(), m_sort);
}
SymbolicMappingVariable::SymbolicMappingVariable(
frontend::TypePointer _type,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(_type, _type, move(_uniqueName), _context)
{
solAssert(isMapping(m_type->category()), "");
}
SymbolicArrayVariable::SymbolicArrayVariable(
frontend::TypePointer _type,
frontend::TypePointer _originalType,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(_type, _originalType, move(_uniqueName), _context)
{
solAssert(isArray(m_type->category()), "");
}
SymbolicArrayVariable::SymbolicArrayVariable(
SortPointer _sort,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(move(_sort), move(_uniqueName), _context)
{
solAssert(m_sort->kind == Kind::Array, "");
}
smt::Expression SymbolicArrayVariable::currentValue(frontend::TypePointer const& _targetType) const
{
optional<smt::Expression> conversion = symbolicTypeConversion(m_originalType, _targetType);
if (conversion)
return *conversion;
return SymbolicVariable::currentValue(_targetType);
}
SymbolicEnumVariable::SymbolicEnumVariable(
frontend::TypePointer _type,
string _uniqueName,
@@ -286,3 +258,62 @@ smt::Expression SymbolicTupleVariable::component(
return smt::Expression::tuple_get(currentValue(), _index);
}
SymbolicArrayVariable::SymbolicArrayVariable(
frontend::TypePointer _type,
frontend::TypePointer _originalType,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(_type, _originalType, move(_uniqueName), _context),
m_pair(
smtSort(*_type),
m_uniqueName + "_length_pair",
m_context
)
{
solAssert(isArray(m_type->category()) || isMapping(m_type->category()), "");
}
SymbolicArrayVariable::SymbolicArrayVariable(
SortPointer _sort,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(move(_sort), move(_uniqueName), _context),
m_pair(
std::make_shared<TupleSort>(
"array_length_pair",
std::vector<std::string>{"array", "length"},
std::vector<SortPointer>{m_sort, SortProvider::intSort}
),
m_uniqueName + "_array_length_pair",
m_context
)
{
solAssert(m_sort->kind == Kind::Array, "");
}
smt::Expression SymbolicArrayVariable::currentValue(frontend::TypePointer const& _targetType) const
{
optional<smt::Expression> conversion = symbolicTypeConversion(m_originalType, _targetType);
if (conversion)
return *conversion;
return m_pair.currentValue();
}
smt::Expression SymbolicArrayVariable::valueAtIndex(int _index) const
{
return m_pair.valueAtIndex(_index);
}
smt::Expression SymbolicArrayVariable::elements()
{
return m_pair.component(0);
}
smt::Expression SymbolicArrayVariable::length()
{
return m_pair.component(1);
}