/export/starexec/sandbox2/solver/bin/starexec_run_default /export/starexec/sandbox2/benchmark/theBenchmark.xml /export/starexec/sandbox2/output/output_files -------------------------------------------------------------------------------- NO ** BEGIN proof argument ** The following rule was generated while unfolding the analyzed TRS: [iteration = 2] c -> c 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 = c and theta2(theta1(l)) = theta1(r|p). Hence, the term theta1(l) = c 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! ## Applying the DP framework... ## 1 initial DP problem to solve. ## First, we try to decompose this problem into smaller problems. ## Round 1 [1 DP problem]: ## DP problem: Dependency pairs = [c^# -> f^#(n__g(n__c)), activate^#(n__c) -> c^#, f^#(n__g(_0)) -> activate^#(_0)] TRS = {c -> f(n__g(n__c)), f(n__g(_0)) -> g(activate(_0)), g(_0) -> n__g(_0), c -> n__c, activate(n__g(_0)) -> g(_0), activate(n__c) -> c, activate(_0) -> _0} ## Trying with homeomorphic embeddings... Failed! ## Trying with polynomial interpretations... Failed! ## Trying with lexicographic path orders... Failed! ## Trying with Knuth-Bendix orders... Failed! Don't know whether this DP problem is finite. ## A DP problem could not be proved finite. ## Now, we try to prove that this problem is infinite. ## Trying to find a loop (forward=true, backward=false, max=-1) # max_depth=2, unfold_variables=false: # Iteration 0: no loop found, 3 unfolded rules generated. # Iteration 1: no loop found, 6 unfolded rules generated. # Iteration 2: success, found a loop, 4 unfolded rules generated. Here is the successful unfolding. Let IR be the TRS under analysis. L0 = c^# -> f^#(n__g(n__c)) [trans] is in U_IR^0. D = f^#(n__g(_0)) -> activate^#(_0) is a dependency pair of IR. We build a composed triple from L0 and D. ==> L1 = c^# -> activate^#(n__c) [trans] is in U_IR^1. D = activate^#(n__c) -> c^# is a dependency pair of IR. We build a composed triple from L1 and D. ==> L2 = c^# -> c^# [trans] is in U_IR^2. This DP problem is infinite. Proof run on Linux version 3.10.0-1160.25.1.el7.x86_64 for amd64 using Java version 1.8.0_292 ** END proof description ** Total number of generated unfolded rules = 22