Spaces
Explore
Communities
Statistics
Reports
Cluster
Status
Help
Higher Order Rewriting Union Beta pair #487093943
details
property
value
status
complete
benchmark
Applicative_first_order_05__21.xml
ran by
Akihisa Yamada
cpu timeout
1200 seconds
wallclock timeout
300 seconds
memory limit
137438953472 bytes
execution host
n143.star.cs.uiowa.edu
space
Uncurried_Applicative_11
run statistics
property
value
solver
Wanda 2.2a
configuration
default
runtime (wallclock)
0.49292 seconds
cpu usage
0.471294
user time
0.403556
system time
0.067738
max virtual memory
113188.0
max residence set size
11524.0
stage attributes
key
value
starexec-result
YES
output
YES We consider the system theBenchmark. Alphabet: !facplus : [a * a] --> a !factimes : [a * a] --> a 0 : [] --> a cons : [c * d] --> d fact : [a] --> a false : [] --> b filter : [c -> b * d] --> d filter2 : [b * c -> b * c * d] --> d map : [c -> c * d] --> d nil : [] --> d p : [a] --> a s : [a] --> a true : [] --> b Rules: p(s(x)) => x fact(0) => s(0) fact(s(x)) => !factimes(s(x), fact(p(s(x)))) !factimes(0, x) => 0 !factimes(s(x), y) => !facplus(!factimes(x, y), y) !facplus(x, 0) => x !facplus(x, s(y)) => s(!facplus(x, y)) map(f, nil) => nil map(f, cons(x, y)) => cons(f x, map(f, y)) filter(f, nil) => nil filter(f, cons(x, y)) => filter2(f x, f, x, y) filter2(true, f, x, y) => cons(x, filter(f, y)) filter2(false, f, x, y) => filter(f, y) This AFS is converted to an AFSM simply by replacing all free variables by meta-variables (with arity 0). We observe that the rules contain a first-order subset: p(s(X)) => X fact(0) => s(0) fact(s(X)) => !factimes(s(X), fact(p(s(X)))) !factimes(0, X) => 0 !factimes(s(X), Y) => !facplus(!factimes(X, Y), Y) !facplus(X, 0) => X !facplus(X, s(Y)) => s(!facplus(X, Y)) Moreover, the system is orthogonal. Thus, by [Kop12, Thm. 7.55], we may omit all first-order dependency pairs from the dependency pair problem (DP(R), R) if this first-order part is terminating when seen as a many-sorted first-order TRS. According to the external first-order termination prover, this system is indeed terminating: || Input TRS: || 1: p(s(PeRCenTX)) -> PeRCenTX || 2: fact(0()) -> s(0()) || 3: fact(s(PeRCenTX)) -> !factimes(s(PeRCenTX),fact(p(s(PeRCenTX)))) || 4: !factimes(0(),PeRCenTX) -> 0() || 5: !factimes(s(PeRCenTX),PeRCenTY) -> !facplus(!factimes(PeRCenTX,PeRCenTY),PeRCenTY) || 6: !facplus(PeRCenTX,0()) -> PeRCenTX || 7: !facplus(PeRCenTX,s(PeRCenTY)) -> s(!facplus(PeRCenTX,PeRCenTY)) || Number of strict rules: 7 || Direct POLO(bPol) ... failed. || Uncurrying !factimes p || 1: p^1_s(PeRCenTX) -> PeRCenTX || 2: fact(0()) -> s(0()) || 3: fact(s(PeRCenTX)) -> !factimes^1_s(PeRCenTX,fact(p^1_s(PeRCenTX))) || 4: !factimes^1_0(PeRCenTX) -> 0() || 5: !factimes^1_s(PeRCenTX,PeRCenTY) -> !facplus(!factimes(PeRCenTX,PeRCenTY),PeRCenTY) || 6: !facplus(PeRCenTX,0()) -> PeRCenTX || 7: !facplus(PeRCenTX,s(PeRCenTY)) -> s(!facplus(PeRCenTX,PeRCenTY)) || 8: p(s(_1)) ->= p^1_s(_1) || 9: !factimes(0(),_1) ->= !factimes^1_0(_1) || 10: !factimes(s(_1),_2) ->= !factimes^1_s(_1,_2) || Number of strict rules: 7 || Direct POLO(bPol) ... failed. || Dependency Pairs: || #1: #!factimes(0(),_1) ->? #!factimes^1_0(_1) || #2: #!facplus(PeRCenTX,s(PeRCenTY)) -> #!facplus(PeRCenTX,PeRCenTY) || #3: #!factimes(s(_1),_2) ->? #!factimes^1_s(_1,_2) || #4: #!factimes^1_s(PeRCenTX,PeRCenTY) -> #!facplus(!factimes(PeRCenTX,PeRCenTY),PeRCenTY) || #5: #!factimes^1_s(PeRCenTX,PeRCenTY) -> #!factimes(PeRCenTX,PeRCenTY) || #6: #fact(s(PeRCenTX)) -> #!factimes^1_s(PeRCenTX,fact(p^1_s(PeRCenTX))) || #7: #fact(s(PeRCenTX)) -> #fact(p^1_s(PeRCenTX)) || #8: #fact(s(PeRCenTX)) -> #p^1_s(PeRCenTX) || #9: #p(s(_1)) ->? #p^1_s(_1) || Number of SCCs: 3, DPs: 4 || SCC { #7 } || POLO(Sum)... succeeded. || !factimes^1_s w: 0 || #!factimes^1_s w: 0 || #!factimes w: 0 || #!factimes^1_0 w: 0 || !factimes w: 0 || s w: x1 + 2 || #p^1_s w: 0 || !factimes^1_0 w: 0 || #!facplus w: 0 || p^1_s w: x1 + 1 || #fact w: x1 || #p w: 0 || p w: 0
popout
output may be truncated. 'popout' for the full output.
job log
popout
actions
all output
return to Higher Order Rewriting Union Beta