Fixed continuous numbering of auxiliary variables.

include/anthem/Context.h

@@ -16,6 +16,12 @@ namespace anthem
 
 struct Context
 {
+	void reset()
+	{
+		headTerms.clear();
+		auxiliaryBodyLiteralID = 1;
+	}
+
 	output::Logger logger;
 
 	std::vector<const Clingo::AST::Term *> headTerms;

include/anthem/StatementVisitor.h

@@ -28,8 +28,7 @@ struct StatementVisitor
 
 	void visit(const Clingo::AST::Rule &rule, const Clingo::AST::Statement &, Context &context)
 	{
-		// TODO: implement more nicely
-		context.headTerms.clear();
+		context.reset();
 
 		auto &outputStream = context.logger.outputStream();