From ccd77233892ace44fd4852999e66534d1c2283ea Mon Sep 17 00:00:00 2001 From: Tim King Date: Tue, 17 Apr 2012 16:07:22 +0000 Subject: Merges branches/arithmetic/atom-database r2979 through 3247 into trunk. Below is a highlight of the changes: - This introduces a new normal form to arithmetic. -- Equalities and disequalities are in solved form. Roughly speaking this means: (= x (+ y z)) is in normal form. (See the comments in normal_form.h for what this formally requires.) -- The normal form for inequality atoms always uses GEQ and GT instead of GEQ and LEQ. Integer atoms always use GEQ. - Constraint was added to TheoryArith. -- A constraint is a triple of (k x v) where: --- k is the type of the constraint (either LowerBound, UpperBound, Equality or Disequality), --- x is an ArithVar, and --- v is a DeltaRational value. -- Constraints are always attached to a ConstraintDatabase. -- A Constraint has its negation in the ConstraintDatabase [at least for now]. -- Every constraint belongs to a set of constraints for each ArithVar sorted by the delta rational values. -- This set can be iterated over and provides efficient access to other constraints for this variable. -- A literal may be attached to a constraint. -- Constraints with attached literals may be marked as being asserted to the theory (sat context dependent). -- Constraints can be propagated. -- Every constraint has a proof (sat context dependent). -- Proofs can be explained for either conflicts or propagations (if the node was propagated). (These proofs may be different.) -- Equalities and disequalities can be marked as being split (user context dependent) - This removes and replaces: -- src/theory/arith/arith_prop_manager.* -- src/theory/arith/atom_database.* -- src/theory/arith/ordered_set.h - Added isZero(), isOne() and isNegativeOne() to Rational and Integer. - Added operator+ to CDList::const_iterator. - Added const_iterator to CDQueue. - Changes to regression tests. --- src/theory/arith/arith_rewriter.h | 1 - 1 file changed, 1 deletion(-) (limited to 'src/theory/arith/arith_rewriter.h') diff --git a/src/theory/arith/arith_rewriter.h b/src/theory/arith/arith_rewriter.h index 07c009b2e..748ed8686 100644 --- a/src/theory/arith/arith_rewriter.h +++ b/src/theory/arith/arith_rewriter.h @@ -66,7 +66,6 @@ private: static RewriteResponse preRewriteAtom(TNode t); static RewriteResponse postRewriteAtom(TNode t); - static RewriteResponse postRewriteAtomConstantRHS(TNode t); static bool isAtom(TNode n); -- cgit v1.2.3