Locations and labels were leaking into constant definitions, thus
preventing TPTP provers to unify them when equal. Example:
const_shdqproofssldtdtsltest_harnessdtmlwdq_17_23_24sh_3 <> const_3.

Remove axioms from int.Power realization.

Add monoids to the algebraic hierarchy.

Indeed their inlining causes an exponential growth of the formulas for all
the provers that are relying on the "eliminate_if" transformation.

Almost all of them are one-liner changes to account for the additional hypotheses.

(in case of a prover upgrade)