File "stdin", line 10, characters 0-28:
Warning: Ambiguous paths: [ac; cd] : A >-> D [ambiguous-paths,typechecker]
[ab] : A >-> B
[ab; bd] : A >-> D
[ac] : A >-> C
[bd] : B >-> D
[cd] : C >-> D
[B_A] : B >-> A
[C_A] : C >-> A
[D_B] : D >-> B
[D_A] : D >-> A
[D_C] : D >-> C
[A'_A] : A' >-> A
[B_A'] : B >-> A'
[B_A'; A'_A] : B >-> A
[C_A'] : C >-> A'
[C_A'; A'_A] : C >-> A
[D_B; B_A'] : D >-> A'
[D_A] : D >-> A
[D_B] : D >-> B
[D_C] : D >-> C
File "stdin", line 103, characters 0-86:
Warning: Ambiguous paths: [D_C; C_A'] : D >-> A'
[ambiguous-paths,typechecker]
[A'_A] : A' >-> A
[B_A'] : B >-> A'
[B_A'; A'_A] : B >-> A
[C_A'] : C >-> A'
[C_A'; A'_A] : C >-> A
[D_B; B_A'] : D >-> A'
[D_A] : D >-> A
[D_B] : D >-> B
[D_C] : D >-> C