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spacer: counterexample to pushing (ctp)

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Enable using fixedpoint.spacer.ctp=true

For each lemma L currently at level k, keep a model M that justifies
why L cannot be pushed to (k+1). L is not pushed while the model M
remains valid.
This commit is contained in:
Arie Gurfinkel 2018-05-22 14:45:05 -07:00
parent 95d820196b
commit 55126692c9
3 changed files with 123 additions and 62 deletions
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3
src/muz/base/fixedpoint_params.pyg
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@ -200,5 +200,6 @@ def_module_params('fixedpoint',
('spacer.p3.share_lemmas', BOOL, False, 'Share frame lemmas'),
('spacer.p3.share_invariants', BOOL, False, "Share invariants lemmas"),
('spacer.from_level', UINT, 0, 'starting level to explore'),
('spacer.print_json', SYMBOL, '', 'print pobs tree in JSON format to a given file')
('spacer.print_json', SYMBOL, '', 'print pobs tree in JSON format to a given file'),
('spacer.ctp', BOOL, False, 'enable counterexample-to-pushing technique'),
))