[SMTChecker] Replace wrap mod by slack vars

libsolidity/formal/EncodingContext.cpp

@@ -32,12 +32,23 @@ EncodingContext::EncodingContext():
 void EncodingContext::reset()
 {
 	resetAllVariables();
+	resetSlackId();
 	m_expressions.clear();
 	m_globalContext.clear();
 	m_state.reset();
 	m_assertions.clear();
 }
 
+void EncodingContext::resetSlackId()
+{
+	m_nextSlackId = 0;
+}
+
+unsigned EncodingContext::newSlackId()
+{
+	return m_nextSlackId++;
+}
+
 void EncodingContext::clear()
 {
 	m_variables.clear();