NO Prover = TRS(tech=GUIDED_UNF, nb_unfoldings=unlimited, unfold_variables=true, strategy=LEFTMOST_NE) ** BEGIN proof argument ** The following rule was generated while unfolding the analyzed TRS: [iteration = 4] h(n__d) -> h(n__d) Let l be the left-hand side and r be the right-hand side of this rule. Let p = epsilon, theta1 = {} and theta2 = {}. We have r|p = h(n__d) and theta2(theta1(l)) = theta1(r|p). Hence, the term theta1(l) = h(n__d) loops w.r.t. the analyzed TRS. ** END proof argument ** ** BEGIN proof description ** ## Searching for a generalized rewrite rule (a rule whose right-hand side contains a variable that does not occur in the left-hand side)... No generalized rewrite rule found! ## Searching for a loop by unfolding (unfolding of variable subterms: ON)... # Iteration 0: no loop detected, 1 unfolded rule generated. # Iteration 1: no loop detected, 1 unfolded rule generated. # Iteration 2: no loop detected, 3 unfolded rules generated. # Iteration 3: no loop detected, 11 unfolded rules generated. # Iteration 4: loop detected, 1 unfolded rule generated. Here is the successful unfolding. Let IR be the TRS under analysis. L0 = [h^#(n__d) -> g^#(n__c), g^#(_0) -> h^#(activate(_0))] is in U_IR^0. We merge the first and the second rule of L0. ==> L1 = h^#(n__d) -> h^#(activate(n__c)) is in U_IR^1. Let p1 = [0]. We unfold the rule of L1 forwards at position p1 with the rule activate(n__c) -> c. ==> L2 = h^#(n__d) -> h^#(c) is in U_IR^2. Let p2 = [0]. We unfold the rule of L2 forwards at position p2 with the rule c -> d. ==> L3 = h^#(n__d) -> h^#(d) is in U_IR^3. Let p3 = [0]. We unfold the rule of L3 forwards at position p3 with the rule d -> n__d. ==> L4 = h^#(n__d) -> h^#(n__d) is in U_IR^4. ** END proof description ** Proof stopped at iteration 4 Number of unfolded rules generated by this proof = 17 Number of unfolded rules generated by all the parallel proofs = 17