init initDerivationsHelpers

Derive | ATermList ATermList ATermList string string ATermList ATermList | ATerm |

| string string | ATerm | EnvBinding |
| string ATermList | ATerm | DerivationInput |
| string string string string | ATerm | DerivationOutput |

Closure | ATermList ATermList | ATerm | OldClosure |
| string ATermList | ATerm | OldClosureElem |
