more checks
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@ 9,12 +9,46 @@ void check_integrity(Graph const & graph)


{


for(NodeId id = 0; id < graph.num_nodes(); ++id)


{


// Check that μ encodes a valid matching


NodeId matched = graph.matched_neighbor(id);


if(matched != id)


{


assert(graph.matched_neighbor(matched) == id);


}




if (graph.is_out_of_forest(id))


{


assert(graph.phi(id) == id);


assert(graph.rho(id) == id);


}


else


{


// check for a path to the root, i.e. ρ(node)


NodeId cur_node = id;


while(cur_node != graph.rho(cur_node))


{


// If the condition was true, then cur_node is outer, part of a blossom


// and we want to follow its path


// therefore, we check that both φ and μ are not the identity on this node


// and point to vertices that have the same rho


assert(graph.matched_neighbor(cur_node) != cur_node);


assert(graph.phi(cur_node) != cur_node);


assert(graph.rho(graph.matched_neighbor(cur_node)) == graph.rho(cur_node));


assert(graph.rho(graph.phi(cur_node)) == graph.rho(cur_node));




// now, walk along the matched edge


cur_node = graph.matched_neighbor(cur_node);




// now we want to walk along φ, this will again


//  not be the identity


//  result in a node that has the same rho


assert(graph.phi(cur_node) != cur_node);


assert(graph.rho(graph.phi(cur_node)) == graph.rho(cur_node));




cur_node = graph.matched_neighbor(graph.phi(cur_node));


}


}




if (not graph.is_outer(id))


{


assert(graph.rho(id) == id);



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