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Basic support to free constants

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This commit is contained in:
Leonardo Alt
2021-04-19 19:23:18 +02:00
parent 6ae82fcec2
commit 095d337140
7 changed files with 39 additions and 48 deletions
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libsolidity/formal/SMTEncoder.cpp
+23 -28
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@@ -51,27 +51,6 @@ SMTEncoder::SMTEncoder(smt::EncodingContext& _context):
bool SMTEncoder::analyze(SourceUnit const& _source)
{
set<SourceUnit const*, smt::EncodingContext::IdCompare> sources;
sources.insert(&_source);
for (auto const& source: _source.referencedSourceUnits(true))
sources.insert(source);
bool analysis = true;
for (auto source: sources)
for (auto node: source->nodes())
if (auto var = dynamic_pointer_cast<VariableDeclaration>(node))
{
m_errorReporter.warning(
8195_error,
var->location(),
"Model checker analysis was not possible because file level constants are not supported."
);
analysis = false;
}
if (!analysis)
return false;
state().prepareForSourceUnit(_source);
return true;
@@ -437,14 +416,9 @@ void SMTEncoder::endVisit(TupleExpression const& _tuple)
auto values = applyMap(_tuple.components(), [this](auto const& component) -> optional<smtutil::Expression> {
if (component)
{
if (auto varDecl = identifierToVariable(*component))
return currentValue(*varDecl);
else
{
if (!m_context.knownExpression(*component))
if (!m_context.knownExpression(*component))
createExpr(*component);
return expr(*component);
}
return expr(*component);
}
return {};
});
@@ -1395,6 +1369,9 @@ void SMTEncoder::endVisit(IndexAccess const& _indexAccess)
auto varDecl = identifierToVariable(*id);
solAssert(varDecl, "");
array = m_context.variable(*varDecl);
if (varDecl && varDecl->isConstant())
m_context.addAssertion(currentValue(*varDecl) == expr(*id));
}
else
{
@@ -2599,6 +2576,7 @@ VariableDeclaration const* SMTEncoder::identifierToVariable(Expression const& _e
solAssert(m_context.knownVariable(*varDecl), "");
return varDecl;
}
return nullptr;
}
@@ -2913,6 +2891,15 @@ set<FunctionCall const*> SMTEncoder::collectABICalls(ASTNode const* _node)
return ABIFunctions(_node).abiCalls;
}
set<SourceUnit const*, ASTNode::CompareByID> SMTEncoder::sourceDependencies(SourceUnit const& _source)
{
set<SourceUnit const*, ASTNode::CompareByID> sources;
sources.insert(&_source);
for (auto const& source: _source.referencedSourceUnits(true))
sources.insert(source);
return sources;
}
void SMTEncoder::createReturnedExpressions(FunctionCall const& _funCall, ContractDefinition const* _contextContract)
{
auto funDef = functionCallToDefinition(_funCall, currentScopeContract(), _contextContract);
@@ -2978,6 +2965,14 @@ void SMTEncoder::collectFreeFunctions(set<SourceUnit const*, ASTNode::CompareByI
}
}
void SMTEncoder::createFreeConstants(set<SourceUnit const*, ASTNode::CompareByID> const& _sources)
{
for (auto source: _sources)
for (auto node: source->nodes())
if (auto var = dynamic_cast<VariableDeclaration const*>(node.get()))
createVariable(*var);
}
smt::SymbolicState& SMTEncoder::state()
{
return m_context.state();