Removes old proof code (#4964)

This deletes much of the old proof code. Basically everything but the minimal necessary infra-structure for producing unsat cores. That includes dependency tracking in preprocessing, the prop engine proof and the unsat core computation code in the old proof manager. These should also go once we fully integrate into master the new proof infrastructure.

It also cleans interfaces that were using old-proof-code-specific constructs (such as LemmaProofRecipe). When possible or when it made sense standalone local proof production code was kept, but deactivated (such is in the equality engine and in the arithmetic solver).

1 files changed, 0 insertions, 69 deletions

diff --git a/src/proof/dimacs.h b/src/proof/dimacs.h
deleted file mode 100644
index 405b33208..000000000
--- a/src/proof/dimacs.h
+++ /dev/null
@@ -1,69 +0,0 @@
-/*********************                                                        */
-/*! \file dimacs.h
- ** \verbatim
- ** Top contributors (to current version):
- **   Alex Ozdemir
- ** This file is part of the CVC4 project.
- ** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
- ** in the top-level source directory) and their institutional affiliations.
- ** All rights reserved.  See the file COPYING in the top-level source
- ** directory for licensing information.\endverbatim
- **
- ** \brief DIMACS SAT Problem Format
- **
- ** Defines serialization/deserialization for SAT problems as DIMACS
- **/
-
-#include "cvc4_private.h"
-
-#ifndef CVC4__PROOF__DIMACS_H
-#define CVC4__PROOF__DIMACS_H
-
-#include <iosfwd>
-#include <memory>
-#include <unordered_map>
-
-#include "proof/clause_id.h"
-#include "prop/sat_solver_types.h"
-
-namespace CVC4 {
-namespace proof {
-
-/**
- * Prints the literal as a (+) or (-) int
- * Not operator<< b/c that represents negation as ~
- *
- * @param o where to print
- * @param l the literal to print
- *
- * @return the original stream
- */
-std::ostream& textOut(std::ostream& o, const prop::SatLiteral& l);
-
-/**
- * Prints the clause as a space-separated list of ints
- * Not operator<< b/c that represents literal negation as ~
- *
- * @param o where to print
- * @param c the clause to print
- *
- * @return the original stream
- */
-std::ostream& textOut(std::ostream& o, const prop::SatClause& c);
-
-/**
- * Prints a CNF formula in DIMACS format
- *
- * @param o where to print to
- * @param usedClauses the CNF formula
- */
-void printDimacs(std::ostream& o,
-                 const std::unordered_map<ClauseId, prop::SatClause>& clauses,
-                 const std::vector<ClauseId>& usedIndices);
-
-std::vector<prop::SatClause> parseDimacs(std::istream& i);
-
-}  // namespace proof
-}  // namespace CVC4
-
-#endif  // CVC4__PROOF__DIMACS_H