diff --git a/lib/adaptive_distinguishing_sequence.cpp b/lib/adaptive_distinguishing_sequence.cpp
index 7d281b4..bc57865 100644
--- a/lib/adaptive_distinguishing_sequence.cpp
+++ b/lib/adaptive_distinguishing_sequence.cpp
@@ -33,11 +33,11 @@ adaptive_distinguishing_sequence create_adaptive_distinguishing_sequence(const r
 
 		vector<bool> states(N, false);
 		for(auto && state : node.CI){
-			states[state.first.base()] = true;
+			states[state.first] = true;
 		}
 
 		const auto & oboom = lca(root, [&states](state state) -> bool{
-			return states[state.base()];
+			return states[state];
 		});
 
 		if(oboom.children.empty()) continue;
@@ -55,7 +55,7 @@ adaptive_distinguishing_sequence create_adaptive_distinguishing_sequence(const r
 				} else if(node.CI[i].first > c.states[j]) {
 					j++;
 				} else {
-					const auto curr = succession[oboom.depth][node.CI[i].first.base()];
+					const auto curr = succession[oboom.depth][node.CI[i].first];
 					const auto init = node.CI[i].second;
 					new_c.CI.push_back({curr, init});
 					i++;
diff --git a/lib/io.hpp b/lib/io.hpp
deleted file mode 100644
index c25f3c7..0000000
--- a/lib/io.hpp
+++ /dev/null
@@ -1,31 +0,0 @@
-#pragma once
-
-#include "phantom.hpp"
-#include "mealy.hpp"
-
-#include <boost/iostreams/device/file_descriptor.hpp>
-#include <boost/iostreams/filter/gzip.hpp>
-#include <boost/iostreams/filtering_stream.hpp>
-
-#include <boost/serialization/serialization.hpp>
-#include <boost/serialization/string.hpp>
-#include <boost/serialization/vector.hpp>
-
-#include <boost/archive/text_oarchive.hpp>
-#include <boost/archive/text_iarchive.hpp>
-#include <boost/archive/binary_oarchive.hpp>
-#include <boost/archive/binary_iarchive.hpp>
-
-#include <iostream>
-#include <fstream>
-
-namespace boost {
-namespace serialization {
-
-template<class Archive, typename B, typename T>
-void serialize(Archive & ar, phantom<B, T> & value, const unsigned int /*version*/){
-	ar & value.x;
-}
-
-} // namespace serialization
-} // namespace boost
diff --git a/lib/mealy.hpp b/lib/mealy.hpp
index 7c01efd..83791a7 100644
--- a/lib/mealy.hpp
+++ b/lib/mealy.hpp
@@ -31,22 +31,22 @@ struct mealy {
 
 inline auto is_complete(const mealy & m){
 	for(state n = 0; n < m.graph_size; ++n){
-		if(m.graph[n.base()].size() != m.input_size) return false;
-		for(auto && e : m.graph[n.base()]) if(e.to == -1 || e.output == -1) return false;
+		if(m.graph[n].size() != m.input_size) return false;
+		for(auto && e : m.graph[n]) if(e.to == -1 || e.output == -1) return false;
 	}
 	return true;
 }
 
 inline auto apply(mealy const & m, state state, input input){
-	return m.graph[state.base()][input.base()];
+	return m.graph[state][input];
 }
 
 template <typename Iterator>
 auto apply(mealy const & m, state state, Iterator b, Iterator e){
-	mealy::edge ret{state, -1};
+	mealy::edge ret;
+	ret.to = state;
 	while(b != e){
-		ret = apply(m, state, *b++);
-		state = ret.to;
+		ret = apply(m, ret.to, *b++);
 	}
 	return ret;
 }
diff --git a/lib/phantom.hpp b/lib/phantom.hpp
deleted file mode 100644
index 39e53ce..0000000
--- a/lib/phantom.hpp
+++ /dev/null
@@ -1,50 +0,0 @@
-#pragma once
-
-#include <boost/operators.hpp>
-
-#include <iosfwd>
-
-template <typename Base, typename T>
-struct phantom : boost::operators<phantom<Base, T>>, boost::shiftable<phantom<Base, T>> {
-	phantom() = default;
-	phantom(Base y) : x(y) {}
-	phantom(phantom const &) = default;
-	phantom& operator=(phantom const &) = default;
-	phantom(phantom &&) = default;
-	phantom& operator=(phantom &&) = default;
-
-	explicit operator Base() const { return x; }
-	Base base() const { return x; }
-
-	Base x;
-
-#define IMPL(op)                         \
-	phantom & operator op (phantom rh) { \
-		x op rh.x;                       \
-		return *this;                    \
-	}
-
-	IMPL(+=)
-	IMPL(-=)
-	IMPL(*=)
-	IMPL(/=)
-	IMPL(%=)
-	IMPL(|=)
-	IMPL(&=)
-	IMPL(^=)
-	IMPL(<<=)
-	IMPL(>>=)
-#undef IMPL
-
-	phantom & operator++() { ++x; return *this; }
-	phantom & operator--() { --x; return *this; }
-
-	bool operator<(phantom rh) const { return x < rh.x; }
-	bool operator==(phantom rh) const { return x == rh.x; }
-};
-
-template <typename B, typename T>
-std::ostream & operator<<(std::ostream & out, phantom<B, T> p){ return out << p.x; }
-
-template <typename B, typename T>
-std::istream & operator>>(std::istream & in, phantom<B, T> & p){ return in >> p.x; }
diff --git a/lib/read_mealy_from_dot.cpp b/lib/read_mealy_from_dot.cpp
index 8ea318f..fbc5999 100644
--- a/lib/read_mealy_from_dot.cpp
+++ b/lib/read_mealy_from_dot.cpp
@@ -54,15 +54,15 @@ mealy read_mealy_from_dot(std::istream & in, translation & t){
 		if(t.output_indices.count(output) < 1) t.output_indices[output] = t.max_output++;
 
 		// add edge
-		m.graph.resize(max_state.base());
-		auto & v = m.graph[state_indices[lh].base()];
-		v.resize(t.max_input.base());
-		v[t.input_indices[input].base()] = {state_indices[rh], t.output_indices[output]};
+		m.graph.resize(max_state);
+		auto & v = m.graph[state_indices[lh]];
+		v.resize(t.max_input);
+		v[t.input_indices[input]] = {state_indices[rh], t.output_indices[output]};
 	}
 
-	m.graph_size = max_state.base();
-	m.input_size = t.max_input.base();
-	m.output_size = t.max_output.base();
+	m.graph_size = max_state;
+	m.input_size = t.max_input;
+	m.output_size = t.max_output;
 
 	if(m.graph_size == 0) throw runtime_error("Empty state set");
 	if(m.input_size == 0) throw runtime_error("Empty input set");
diff --git a/lib/read_mealy_from_dot.hpp b/lib/read_mealy_from_dot.hpp
index 8836d9f..653d7cb 100644
--- a/lib/read_mealy_from_dot.hpp
+++ b/lib/read_mealy_from_dot.hpp
@@ -32,7 +32,7 @@ template <typename T>
 std::vector<std::string> create_reverse_map(std::map<std::string, T> const & indices){
 	std::vector<std::string> ret(indices.size());
 	for(auto&& p : indices){
-		ret[p.second.base()] = p.first;
+		ret[p.second] = p.first;
 	}
 	return ret;
 }
diff --git a/lib/seperating_family.cpp b/lib/seperating_family.cpp
index ecbdfce..8c50651 100644
--- a/lib/seperating_family.cpp
+++ b/lib/seperating_family.cpp
@@ -24,7 +24,7 @@ seperating_family create_seperating_family(const adaptive_distinguishing_sequenc
 			// add sequence to this leave
 			for(auto && p : node.CI){
 				const auto state = p.second;
-				seperating_family[state.base()].push_back(word);
+				seperating_family[state].push_back(word);
 			}
 
 			// if the leaf is not a singleton, we need the all_pair seperating seqs
@@ -33,7 +33,7 @@ seperating_family create_seperating_family(const adaptive_distinguishing_sequenc
 					const auto s = p.second;
 					const auto t = q.second;
 					if(s == t) continue;
-					seperating_family[s.base()].push_back(all_pair_seperating_sequences[s.base()][t.base()]);
+					seperating_family[s].push_back(all_pair_seperating_sequences[s][t]);
 				}
 			}
 
diff --git a/lib/seperating_matrix.cpp b/lib/seperating_matrix.cpp
index 8a21e2a..0f80ef9 100644
--- a/lib/seperating_matrix.cpp
+++ b/lib/seperating_matrix.cpp
@@ -26,10 +26,10 @@ seperating_matrix create_all_pair_seperating_sequences(const splitting_tree & ro
 			while(jt != ed){
 				for(auto && s : it->states){
 					for(auto && t : jt->states){
-						assert(all_pair_seperating_sequences[t.base()][s.base()].empty());
-						assert(all_pair_seperating_sequences[s.base()][t.base()].empty());
-						all_pair_seperating_sequences[t.base()][s.base()] = node.seperator;
-						all_pair_seperating_sequences[s.base()][t.base()] = node.seperator;
+						assert(all_pair_seperating_sequences[t][s].empty());
+						assert(all_pair_seperating_sequences[s][t].empty());
+						all_pair_seperating_sequences[t][s] = node.seperator;
+						all_pair_seperating_sequences[s][t] = node.seperator;
 					}
 				}
 				jt++;
diff --git a/lib/splitting_tree.cpp b/lib/splitting_tree.cpp
index adfe3ac..a29c5ea 100644
--- a/lib/splitting_tree.cpp
+++ b/lib/splitting_tree.cpp
@@ -68,7 +68,7 @@ result create_splitting_tree(const mealy& g, options opt){
 
 		for(auto && block : blocks) {
 			const auto new_blocks = partition_(begin(block), end(block), [symbol, &g](state state){
-				return apply(g, state, symbol).to.base();
+				return apply(g, state, symbol).to;
 			}, N);
 			for(auto && new_block : new_blocks){
 				if(new_block.size() != 1) return false;
@@ -78,7 +78,7 @@ result create_splitting_tree(const mealy& g, options opt){
 	};
 	const auto update_succession = [N, &succession](state s, state t, size_t depth){
 		if(succession.size() < depth+1) succession.resize(depth+1, vector<state>(N, -1));
-		succession[depth][s.base()] = t;
+		succession[depth][s] = t;
 	};
 
 	// We'll start with the root, obviously
@@ -99,7 +99,7 @@ result create_splitting_tree(const mealy& g, options opt){
 			const auto new_blocks = partition_(begin(boom.states), end(boom.states), [symbol, depth, &g, &update_succession](state state){
 				const auto ret = apply(g, state, symbol);
 				update_succession(state, ret.to, depth);
-				return ret.output.base();
+				return ret.output;
 			}, Q);
 
 			// no split -> continue with other input symbols
@@ -119,11 +119,11 @@ result create_splitting_tree(const mealy& g, options opt){
 		for(input symbol : all_inputs){
 			vector<bool> successor_states(N, false);
 			for(auto && state : boom.states){
-				successor_states[apply(g, state, symbol).to.base()] = true;
+				successor_states[apply(g, state, symbol).to] = true;
 			}
 
 			const auto & oboom = lca(root, [&successor_states](state state) -> bool{
-				return successor_states[state.base()];
+				return successor_states[state];
 			});
 
 			// a leaf, hence not a split -> try other symbols
@@ -134,7 +134,7 @@ result create_splitting_tree(const mealy& g, options opt){
 			const auto new_blocks = partition_(begin(boom.states), end(boom.states), [word, depth, &g, &update_succession](state state){
 				const auto ret = apply(g, state, begin(word), end(word));
 				update_succession(state, ret.to, depth);
-				return ret.output.base();
+				return ret.output;
 			}, Q);
 
 			// not a valid split -> continue
diff --git a/lib/transfer_sequences.cpp b/lib/transfer_sequences.cpp
index aae7deb..766fec6 100644
--- a/lib/transfer_sequences.cpp
+++ b/lib/transfer_sequences.cpp
@@ -21,16 +21,16 @@ transfer_sequences create_transfer_sequences(const mealy& machine, state s){
 		const auto d = p.first - 1;
 		work.pop();
 
-		if(visited[u.base()]) continue;
+		if(visited[u]) continue;
 
-		visited[u.base()] = true;
+		visited[u] = true;
 
 		for(input i = 0; i < machine.input_size; ++i){
 			const auto v = apply(machine, u, i).to;
-			if(visited[v.base()]) continue;
+			if(visited[v]) continue;
 
-			words[v.base()] = words[u.base()];
-			words[v.base()].push_back(i);
+			words[v] = words[u];
+			words[v].push_back(i);
 			work.push({d, v});
 		}
 	}
@@ -55,17 +55,17 @@ transfer_sequences create_randomized_transfer_sequences(const mealy & machine, s
 		const auto d = p.first - 1;
 		work.pop();
 
-		if(visited[u.base()]) continue;
+		if(visited[u]) continue;
 
-		visited[u.base()] = true;
+		visited[u] = true;
 
 		shuffle(begin(all_inputs), end(all_inputs), generator);
 		for(input i : all_inputs){
 			const auto v = apply(machine, u, i).to;
-			if(visited[v.base()]) continue;
+			if(visited[v]) continue;
 
-			words[v.base()] = words[u.base()];
-			words[v.base()].push_back(i);
+			words[v] = words[u];
+			words[v].push_back(i);
 			work.push({d, v});
 		}
 	}
diff --git a/lib/types.hpp b/lib/types.hpp
index 202043d..7871280 100644
--- a/lib/types.hpp
+++ b/lib/types.hpp
@@ -1,15 +1,11 @@
 #pragma once
 
-#include "phantom.hpp"
-
 #include <vector>
 
-/* We use size_t's for easy indexing. But we do not want to mix states and
- * inputs. We use phantom typing to "generate" distinguished types :).
- */
-using state = phantom<size_t, struct state_tag>;
-using input = phantom<size_t, struct input_tag>;
-using output = phantom<size_t, struct output_tag>;
+// We use size_ts for fast indexing. Note that there is little type safety here
+using state = size_t;
+using input = size_t;
+using output = size_t;
 
 using word = std::vector<input>;
 
@@ -24,7 +20,7 @@ std::vector<T> concat(std::vector<T> const & l, std::vector<T> const & r){
 
 // extends all words in seqs by all input symbols. Used to generate *all* strings
 inline std::vector<word> all_seqs(input min, input max, std::vector<word> const & seqs){
-	std::vector<word> ret((max.base() - min.base()) * seqs.size());
+	std::vector<word> ret((max - min) * seqs.size());
 	auto it = begin(ret);
 	for(auto const & x : seqs){
 		for(input i = min; i < max; ++i){
diff --git a/src/conf.cpp b/src/conf.cpp
deleted file mode 100644
index 894b1e5..0000000
--- a/src/conf.cpp
+++ /dev/null
@@ -1,82 +0,0 @@
-#include <mealy.hpp>
-#include <read_mealy_from_dot.hpp>
-
-#include <io.hpp>
-
-#include <fstream>
-#include <iostream>
-#include <map>
-#include <string>
-
-using namespace std;
-
-template <typename T>
-vector<T> resize_new(vector<T> const & in, size_t N){
-	vector<T> ret(N);
-	copy_n(in.begin(), N, ret.begin());
-	return ret;
-}
-
-struct mealy_with_maps {
-	mealy machine;
-	map<string, input> inputs;
-	vector<string> outputs;
-};
-
-vector<string> conform(mealy_with_maps const & spec, mealy_with_maps const & impl, vector<vector<string>> const & suite){
-	for(auto && test : suite){
-		state s = 0;
-		state t = 0;
-
-		size_t count = 0;
-		for(auto && i : test){
-			const auto i1 = spec.inputs.at(i);
-			const auto r1 = apply(spec.machine, s, i1);
-			const auto o1 = spec.outputs[r1.output.base()];
-			s = r1.to;
-
-			const auto i2 = impl.inputs.at(i);
-			const auto r2 = apply(impl.machine, t, i2);
-			const auto o2 = impl.outputs[r2.output.base()];
-			t = r2.to;
-
-			if(o1 != o2){
-				return resize_new(test, count+1);
-			}
-			count++;
-		}
-	}
-
-	return {};
-}
-
-vector<vector<string>> open_suite(string suite_filename){
-	boost::iostreams::filtering_istream suite_file;
-	suite_file.push(boost::iostreams::gzip_decompressor());
-	suite_file.push(boost::iostreams::file_descriptor_source(suite_filename));
-	boost::archive::text_iarchive archive(suite_file);
-
-	vector<vector<string>> suite;
-	archive >> suite;
-	return suite;
-}
-
-int main(int argc, char *argv[]){
-	if(argc != 3) return 1;
-
-	const auto spec = read_mealy_from_dot(argv[1]);
-	const auto spec_o_map = create_reverse_map(spec.second.output_indices);
-
-	const auto impl = read_mealy_from_dot(argv[2]);
-	const auto impl_o_map = create_reverse_map(impl.second.output_indices);
-
-	const auto suite = open_suite(argv[1] + string("test_suite"));
-
-	const auto counter_example = conform({spec.first, spec.second.input_indices, spec_o_map}, {impl.first, impl.second.input_indices, impl_o_map}, suite);
-	if(counter_example.empty()){
-		cerr << "No counter example found" << endl;
-	}
-	for(auto && i : counter_example) cout << i << ' ';
-	cout << endl;
-}
-
diff --git a/src/main.cpp b/src/main.cpp
index f2a5b57..e1d0e44 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -101,11 +101,11 @@ int main(int argc, char *argv[]) try {
 				for(input i = 0; i < machine.input_size; ++i){
 					//const auto test1 = apply(machine, s, i).output != machine.output_indices.at("quiescence");
 					const auto test2 = apply(machine, s, i).to != s;
-					r_cache[i.base()] = 0.1 + test2;
+					r_cache[i] = 0.1 + test2;
 				}
 			}
 
-			distributions[s.base()] = discrete_distribution<input>(begin(r_cache), end(r_cache));
+			distributions[s] = discrete_distribution<input>(begin(r_cache), end(r_cache));
 		}
 		return distributions;
 	});
@@ -122,7 +122,7 @@ int main(int argc, char *argv[]) try {
 	const auto inputs = inputs_fut.get();
 
 	const auto print_word = [&](auto w){
-		for(auto && x : w) cout << inputs[x.base()] << ' ';
+		for(auto && x : w) cout << inputs[x] << ' ';
 	};
 
 	if(statistics){
@@ -176,9 +176,9 @@ int main(int argc, char *argv[]) try {
 		for(int k = 0; k <= k_max; ++k){
 			cerr << "*** K = " << k << endl;
 			for(state s = 0; s < machine.graph_size; ++s){
-				const auto prefix = transfer_sequences[s.base()];
+				const auto prefix = transfer_sequences[s];
 
-				for(auto && suffix : seperating_family[s.base()]){
+				for(auto && suffix : seperating_family[s]){
 					for(auto && r : all_sequences){
 						print_word(prefix);
 						print_word(r);
@@ -214,14 +214,14 @@ int main(int argc, char *argv[]) try {
 			m.reserve(k_max + 2);
 			size_t minimal_size = k_max + 1;
 			while(minimal_size || unfair_coin(generator)){
-				input i = relevant_inputs[current_state.base()](generator);
+				input i = relevant_inputs[current_state](generator);
 				m.push_back(i);
 				current_state = apply(machine, current_state, i).to;
 				if(minimal_size) minimal_size--;
 			}
 
 			using params = uniform_int_distribution<size_t>::param_type;
-			const auto & suffixes = seperating_family[current_state.base()];
+			const auto & suffixes = seperating_family[current_state];
 			const auto & s = suffixes[suffix_selection(generator, params{0, suffixes.size()-1})];
 
 			print_word(p);
diff --git a/src/metrics.cpp b/src/metrics.cpp
index 91f1414..0b4034e 100644
--- a/src/metrics.cpp
+++ b/src/metrics.cpp
@@ -16,13 +16,13 @@ auto create_transfer_sequences(const mealy& machine, const state s, const input
 		const auto u = work.front();
 		work.pop();
 
-		if(visited[u.base()]) continue;
-		visited[u.base()] = true;
+		if(visited[u]) continue;
+		visited[u] = true;
 
 		for(input i = 0; i < machine.input_size; ++i){
 			if(i == ignore) continue;
 			const auto v = apply(machine, u, i).to;
-			if(visited[v.base()]) continue;
+			if(visited[v]) continue;
 			work.push(v);
 		}
 	}
@@ -40,7 +40,7 @@ int main(int argc, char *argv[]){
 
 //	vector<vector<bool>> table(machine.input_size);
 //	for(input i = 0; i < machine.input_size; ++i){
-//		table[i.base()] = create_transfer_sequences(machine, 0, i);
+//		table[i] = create_transfer_sequences(machine, 0, i);
 //	}
 
 	// note the wrong iteration ;D
diff --git a/src/phantom_test.cpp b/src/phantom_test.cpp
deleted file mode 100644
index ea3e7aa..0000000
--- a/src/phantom_test.cpp
+++ /dev/null
@@ -1,30 +0,0 @@
-#include <phantom.hpp>
-#include <iostream>
-
-template <typename T>
-using phantom_int = phantom<int, T>;
-
-struct state_tag;
-using state = phantom_int<state_tag>;
-
-struct input_tag;
-using input = phantom_int<input_tag>;
-
-int main(int argc, char *argv[]){
-	state x = 5;
-	x += 5;
-
-	input y = 9;
-	y -= 9;
-	y++;
-
-	std::cout << (x - 1) << std::endl;
-	std::cout << (y << 1) << std::endl;
-	// std::cout << x+y << std::endl; // does not compile
-
-	for(input i = 0; i < 10; ++i){
-		std::cout << i << ", ";
-	}
-	std::cout << std::endl;
-}
-
diff --git a/src/pre_gephi_tool.cpp b/src/pre_gephi_tool.cpp
index 9485c09..f47042d 100644
--- a/src/pre_gephi_tool.cpp
+++ b/src/pre_gephi_tool.cpp
@@ -54,10 +54,10 @@ int main(int argc, char *argv[]){
 		for(auto && p : state_cover){
 			state s = 0;
 			for(auto && inp : p){
-				if(!visited[s.base()]) visited[s.base()] = i;
+				if(!visited[s]) visited[s] = i;
 				s = apply(machine, s, inp).to;
 			}
-			if(!visited[s.base()]) visited[s.base()] = i;
+			if(!visited[s]) visited[s] = i;
 		}
 	}
 
@@ -72,21 +72,21 @@ int main(int argc, char *argv[]){
 		out << "digraph {\n";
 
 		for(state s = 0; s < machine.graph_size; ++s){
-			bool is_visited = visited[s.base()] ? (visited[s.base()].value() <= i) : false;
+			bool is_visited = visited[s] ? (visited[s].value() <= i) : false;
 			out << "\t" << "s" << s << " [";
 			out << "color=\"" << (is_visited ? "green" : "red") << "\"" << ", ";
-			out << "pos=\"" << positions[s.base()].first << "," << positions[s.base()].second << "\"";
+			out << "pos=\"" << positions[s].first << "," << positions[s].second << "\"";
 			out << "]\n";
 		}
 
 		for(state s = 0; s < machine.graph_size; ++s){
 			vector<bool> visited(machine.graph_size, false);
-			visited[s.base()] = true;
+			visited[s] = true;
 			for(input i = 0; i < machine.input_size; ++i){
 				const auto t = apply(machine, s, i).to;
-				if(visited[t.base()]) continue;
+				if(visited[t]) continue;
 				out << "\t" << "s" << s << " -> " << "s" << t << "\n";
-				visited[t.base()] = true;
+				visited[t] = true;
 			}
 		}
 
diff --git a/src/reachability.cpp b/src/reachability.cpp
index 27088c6..d3a73b4 100644
--- a/src/reachability.cpp
+++ b/src/reachability.cpp
@@ -42,12 +42,12 @@ int main(int argc, char *argv[]){
 		const state s = work.front();
 		work.pop();
 
-		if(visited[s.base()]) continue;
-		visited[s.base()] = true;
+		if(visited[s]) continue;
+		visited[s] = true;
 
 		for(auto x : subalphabet){
 			const state t = apply(machine, s, x).to;
-			if(!visited[t.base()]) work.push(t);
+			if(!visited[t]) work.push(t);
 		}
 	}
 
@@ -56,21 +56,21 @@ int main(int argc, char *argv[]){
 	out << "digraph {\n";
 
 	for(state s = 0; s < machine.graph_size; ++s){
-		bool is_visited = visited[s.base()];
+		bool is_visited = visited[s];
 		out << "\t" << "s" << s << " [";
 		out << "color=\"" << (is_visited ? "green" : "red") << "\"" << ", ";
-		out << "pos=\"" << positions[s.base()].first << "," << positions[s.base()].second << "\"";
+		out << "pos=\"" << positions[s].first << "," << positions[s].second << "\"";
 		out << "]\n";
 	}
 
 	for(state s = 0; s < machine.graph_size; ++s){
 		vector<bool> visited(machine.graph_size, false);
-		visited[s.base()] = true;
+		visited[s] = true;
 		for(input i = 0; i < machine.input_size; ++i){
 			const auto t = apply(machine, s, i).to;
-			if(visited[t.base()]) continue;
+			if(visited[t]) continue;
 			out << "\t" << "s" << s << " -> " << "s" << t << "\n";
-			visited[t.base()] = true;
+			visited[t] = true;
 		}
 	}
 
diff --git a/src/stats.cpp b/src/stats.cpp
index 23e1a4d..4ec6497 100644
--- a/src/stats.cpp
+++ b/src/stats.cpp
@@ -1,4 +1,3 @@
-#include <io.hpp>
 #include <mealy.hpp>
 #include <read_mealy_from_dot.hpp>
 
@@ -18,33 +17,9 @@ void print_stats_for_machine(string filename){
 	cout << '\t' << machine.output_size << " outputs\n";
 }
 
-void print_stats_for_suite(string filename){
-	boost::iostreams::filtering_istream suite_file;
-	suite_file.push(boost::iostreams::gzip_decompressor());
-	suite_file.push(boost::iostreams::file_descriptor_source(filename));
-	boost::archive::text_iarchive archive(suite_file);
-
-	vector<vector<string>> suite;
-	archive >> suite;
-
-	const auto & longest = *max_element(suite.begin(), suite.end(), [](const auto & x, const auto & y){ return x.size() < y.size(); });
-	const auto total_length = accumulate(suite.begin(), suite.end(), 0, [](const auto & x, const auto & y){ return x + y.size(); });
-
-	cout << "suite " << filename << " has\n";
-	cout << '\t' << suite.size() << " sequences\n";
-	cout << '\t' << total_length << " input symbols in total\n";
-	cout << '\t' << double(total_length) / suite.size() << " input symbols on average per test\n";
-	cout << '\t' << longest.size() << " inputs symbols in the longest test\n";
-}
-
 int main(int argc, char *argv[]){
 	if(argc != 2) return 37;
 
 	const string filename = argv[1];
-	if(filename.find("test_suite") == string::npos){
-		print_stats_for_machine(filename);
-	} else {
-		print_stats_for_suite(filename);
-	}
+	print_stats_for_machine(filename);
 }
-