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* For every loop decreases clause N, generate a free loop invariant N <= N0, where N0 is the value of N just before the loop.
* Added Test/dafny1/KatzManna.dfy, which contains the 3 programs (and their termination annotations) from the Katz and Manna 1975 paper "A closer look at termination" (which benefits from the feature above).
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* Improved design and implementation of SplitExpr
* Fixed some tests in dafny0/Use.dfy
* Added test case (in dafny0/Termination.dfy) to test the recent strengthening of set axioms
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clauses (for loop guard A!=B and for loop guards with multiple conjuncts)
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bodies) match expressions.
Addressed a couple of todos, including checking the well-formedness of quantifiers and if-then-else expressions in function bodies.
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variables, if they were not already local variables.
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rustanleino