TIME: 360


SCC: 15
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Global Ranking Function: nat(1*A+ -1)

  Internal_length()I(A) :- Internal_length()I(B) [1*A+ -1*B>=1,1*B>=1]
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SCC: 48
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Global Ranking Function: nat(1*B)

  7_loop(A,B) :- 7_loop(C,D) [1*D>=0,1*A>= -1,1*B+ -1*D=1]
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