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71 lines
1.1 KiB
C++
71 lines
1.1 KiB
C++
/*++
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Copyright (c) 2012 Microsoft Corporation
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Module Name:
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recover_01_tactic.h
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Author:
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Leonardo de Moura (leonardo) 2012-02-17.
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Tactic Documentation:
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## Tactic recover-01
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### Short Description
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Recover 01 variables from propositional constants.
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### Long Description
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Search for clauses of the form
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```
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p or q or x = 0
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~p or q or x = k1
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p or ~q or x = k2
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~p or ~q or x = k1+k2
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```
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Then, replaces
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* `x` with `k1*y1 + k2*y2`
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* `p` with `y1 = 1`
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* `q` with `y2 = 1`
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where `y1` and `y2` are fresh 01 variables.
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The clauses are also removed.
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### Example
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```z3
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(declare-const p Bool)
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(declare-const q Bool)
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(declare-const x Int)
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(assert (or p q (= x 0)))
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(assert (or (not p) q (= x 3)))
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(assert (or p (not q) (= x 6)))
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(assert (or (not p) (not q) (= x 9)))
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(apply recover-01)
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```
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### Notes
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* does not support proofs, does not support cores
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--*/
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#pragma once
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#include "util/params.h"
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class ast_manager;
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class tactic;
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tactic * mk_recover_01_tactic(ast_manager & m, params_ref const & p = params_ref());
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/*
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ADD_TACTIC("recover-01", "recover 0-1 variables hidden as Boolean variables.", "mk_recover_01_tactic(m, p)")
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*/
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