The Runtime Complexity (full) of the given CpxTRS could be proven to be BOUNDS(1, n^1).

(0) Obligation:

The Runtime Complexity (full) of the given CpxTRS could be proven to be BOUNDS(1, n^1).


The TRS R consists of the following rules:

active(f(f(a))) → mark(c(f(g(f(a)))))
active(f(X)) → f(active(X))
active(g(X)) → g(active(X))
f(mark(X)) → mark(f(X))
g(mark(X)) → mark(g(X))
proper(f(X)) → f(proper(X))
proper(a) → ok(a)
proper(c(X)) → c(proper(X))
proper(g(X)) → g(proper(X))
f(ok(X)) → ok(f(X))
c(ok(X)) → ok(c(X))
g(ok(X)) → ok(g(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Rewrite Strategy: FULL

(1) NestedDefinedSymbolProof (BOTH BOUNDS(ID, ID) transformation)

The following defined symbols can occur below the 0th argument of top: proper, active
The following defined symbols can occur below the 0th argument of proper: proper, active
The following defined symbols can occur below the 0th argument of active: proper, active

Hence, the left-hand sides of the following rules are not basic-reachable and can be removed:
active(f(f(a))) → mark(c(f(g(f(a)))))
active(f(X)) → f(active(X))
active(g(X)) → g(active(X))
proper(f(X)) → f(proper(X))
proper(c(X)) → c(proper(X))
proper(g(X)) → g(proper(X))

(2) Obligation:

The Runtime Complexity (full) of the given CpxTRS could be proven to be BOUNDS(1, n^1).


The TRS R consists of the following rules:

g(ok(X)) → ok(g(X))
top(ok(X)) → top(active(X))
f(mark(X)) → mark(f(X))
c(ok(X)) → ok(c(X))
f(ok(X)) → ok(f(X))
g(mark(X)) → mark(g(X))
top(mark(X)) → top(proper(X))
proper(a) → ok(a)

Rewrite Strategy: FULL

(3) RcToIrcProof (BOTH BOUNDS(ID, ID) transformation)

Converted rc-obligation to irc-obligation.

As the TRS is a non-duplicating overlay system, we have rc = irc.

(4) Obligation:

The Runtime Complexity (innermost) of the given CpxTRS could be proven to be BOUNDS(1, n^1).


The TRS R consists of the following rules:

g(ok(X)) → ok(g(X))
top(ok(X)) → top(active(X))
f(mark(X)) → mark(f(X))
c(ok(X)) → ok(c(X))
f(ok(X)) → ok(f(X))
g(mark(X)) → mark(g(X))
top(mark(X)) → top(proper(X))
proper(a) → ok(a)

Rewrite Strategy: INNERMOST

(5) CpxTrsMatchBoundsProof (EQUIVALENT transformation)

A linear upper bound on the runtime complexity of the TRS R could be shown with a Match Bound [MATCHBOUNDS1,MATCHBOUNDS2] of 2.
The certificate found is represented by the following graph.

Start state: 11
Accept states: [12]
Transitions:
11→12[g_1|0, top_1|0, f_1|0, c_1|0, proper_1|0]
11→13[ok_1|1]
11→14[mark_1|1]
11→15[top_1|1]
11→16[top_1|1]
11→17[mark_1|1]
11→18[ok_1|1]
11→19[ok_1|1]
11→20[ok_1|1]
11→21[top_1|2]
12→12[ok_1|0, active_1|0, mark_1|0, a|0]
13→12[g_1|1]
13→13[ok_1|1]
13→14[mark_1|1]
14→12[g_1|1]
14→13[ok_1|1]
14→14[mark_1|1]
15→12[active_1|1]
16→12[proper_1|1]
16→20[ok_1|1]
17→12[f_1|1]
17→17[mark_1|1]
17→18[ok_1|1]
18→12[f_1|1]
18→17[mark_1|1]
18→18[ok_1|1]
19→12[c_1|1]
19→19[ok_1|1]
20→12[a|1]
21→20[active_1|2]

(6) BOUNDS(1, n^1)