details

property	value
status	complete
benchmark	append-wrong.xml
ran by	Akihisa Yamada
cpu timeout	1200 seconds
wallclock timeout	300 seconds
memory limit	137438953472 bytes
execution host	n175.star.cs.uiowa.edu
space	CiME_04

run statistics

property	value
solver	NTI-TC20-firstrun
configuration	Default 200
runtime (wallclock)	0.196904 seconds
cpu usage	0.275898
user time	0.237731
system time	0.038167
max virtual memory	113188.0
max residence set size	56408.0

stage attributes

key	value
starexec-result	NO

output

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] ifappend(cons(_0,_1),_2,false) -> ifappend(cons(_0,_1),_2,false) 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 = ifappend(cons(_0,_1),_2,false) and theta2(theta1(l)) = theta1(r|p). Hence, the term theta1(l) = ifappend(cons(_0,_1),_2,false) 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, 2 unfolded rules generated. # Iteration 3: no loop detected, 8 unfolded rules generated. # Iteration 4: loop detected, 1 unfolded rule generated. Here is the successful unfolding. Let IR be the TRS under analysis. L0 = [ifappend^#(_0,_1,false) -> append^#(tl(_0),_1), append^#(_2,_3) -> ifappend^#(_2,_3,is_empty(_2))] is in U_IR^0. We merge the first and the second rule of L0. ==> L1 = ifappend^#(_0,_1,false) -> ifappend^#(tl(_0),_1,is_empty(tl(_0))) is in U_IR^1. Let p1 = [0]. We unfold the rule of L1 forwards at position p1 with the rule tl(cons(_0,_1)) -> cons(_0,_1). ==> L2 = ifappend^#(cons(_0,_1),_2,false) -> ifappend^#(cons(_0,_1),_2,is_empty(tl(cons(_0,_1)))) is in U_IR^2. Let p2 = [2, 0]. We unfold the rule of L2 forwards at position p2 with the rule tl(cons(_0,_1)) -> cons(_0,_1). ==> L3 = ifappend^#(cons(_0,_1),_2,false) -> ifappend^#(cons(_0,_1),_2,is_empty(cons(_0,_1))) is in U_IR^3. Let p3 = [2]. We unfold the rule of L3 forwards at position p3 with the rule is_empty(cons(_0,_1)) -> false. ==> L4 = ifappend^#(cons(_0,_1),_2,false) -> ifappend^#(cons(_0,_1),_2,false) is in U_IR^4. ** END proof description ** Proof stopped at iteration 4 Number of unfolded rules generated by this proof = 13 Number of unfolded rules generated by all the parallel proofs = 13 popout

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actions

all output return to TRS Standard