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this required that this commit globally modify most files. If you
want to use git blame to see the real author of a line use the
``-w`` flag so that whitespace changes are ignored.
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spaces.
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Bizarely Array.bpl does not pass on Windows. This will be fixed soon.
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temporary hack in FloydCycleDetect.dfy to be corrected shortly)
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division '/' and (uninterpreted) real exponentiation '**', real literals and coercion functions 'int' and 'real';
Integer operations 'div' and 'mod' are now mapped to corresponding SMT-LIB operations instead of treating them uninterpreted;
Made unary minus valid Boogie syntax again (the expression '- e' used to be rewritten by the parser to '0 - e', now this is done when generating VCs);
Extended the BigDec class with additional functionality;
Added test cases for SMT-LIB prover backend (the Z3 API interface has been adapted accordingly, but is untested)
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