From: Clark Barrett Date: Thu, 15 Nov 2012 21:27:33 +0000 (+0000) Subject: More fixes to model generation, with previously failing testcases X-Git-Tag: cvc5-1.0.0~7588 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a8ae064eb9ee7175e83eee29d03459b22aa158ef;p=cvc5.git More fixes to model generation, with previously failing testcases Also refactored some header file includes to reduce compile time --- diff --git a/src/theory/booleans/theory_bool.h b/src/theory/booleans/theory_bool.h index ec29a407c..d291e79d6 100644 --- a/src/theory/booleans/theory_bool.h +++ b/src/theory/booleans/theory_bool.h @@ -21,7 +21,6 @@ #include "theory/theory.h" #include "context/context.h" -#include "theory/model.h" namespace CVC4 { namespace theory { diff --git a/src/theory/bv/bv_subtheory_eq.cpp b/src/theory/bv/bv_subtheory_eq.cpp index f8e6882a9..17ea7034b 100644 --- a/src/theory/bv/bv_subtheory_eq.cpp +++ b/src/theory/bv/bv_subtheory_eq.cpp @@ -18,6 +18,7 @@ #include "theory/bv/theory_bv.h" #include "theory/bv/theory_bv_utils.h" #include "theory/model.h" + using namespace std; using namespace CVC4; using namespace CVC4::context; diff --git a/src/theory/bv/theory_bv.cpp b/src/theory/bv/theory_bv.cpp index e82a2c75c..a37ed59c8 100644 --- a/src/theory/bv/theory_bv.cpp +++ b/src/theory/bv/theory_bv.cpp @@ -22,6 +22,7 @@ #include "theory/bv/options.h" #include "theory/bv/theory_bv_rewrite_rules_normalization.h" #include "theory/model.h" + using namespace CVC4; using namespace CVC4::theory; using namespace CVC4::theory::bv; diff --git a/src/theory/model.cpp b/src/theory/model.cpp index 72352f6d3..63772cc1f 100644 --- a/src/theory/model.cpp +++ b/src/theory/model.cpp @@ -415,6 +415,7 @@ void TheoryEngineModelBuilder::buildModel(Model* m, bool fullModel) std::set< TypeNode > allTypes; eqcs_i = eq::EqClassesIterator(&tm->d_equalityEngine); for ( ; !eqcs_i.isFinished(); ++eqcs_i) { + // eqc is the equivalence class representative Node eqc = (*eqcs_i); Trace("model-builder") << "Processing EC: " << eqc << endl; @@ -470,7 +471,9 @@ void TheoryEngineModelBuilder::buildModel(Model* m, bool fullModel) TypeSet::iterator it; set::iterator type_it; + set::iterator i, i2; bool changed, unassignedAssignable, assignOne = false; + set evaluableSet; // Double-fixed-point loop // Outer loop handles a special corner case (see code at end of loop for details) @@ -482,60 +485,26 @@ void TheoryEngineModelBuilder::buildModel(Model* m, bool fullModel) do { changed = false; unassignedAssignable = false; + evaluableSet.clear(); // Iterate over all types we've seen for (type_it = allTypes.begin(); type_it != allTypes.end(); ++type_it) { TypeNode t = *type_it; TypeNode tb = t.getBaseType(); - set::iterator i, i2; - - // 1. First normalize any non-const representative terms for this type - set* repSet = typeRepSet.getSet(tb); - bool done = repSet == NULL || repSet->empty(); - if (!done) { - Trace("model-builder") << " Normalizing base type: " << tb << endl; - } - while (!done) { - done = true; - d_normalizedCache.clear(); - for (i = repSet->begin(); i != repSet->end(); ) { - Assert(assertedReps.find(*i) != assertedReps.end()); - Node rep = assertedReps[*i]; - Node normalized = normalize(tm, rep, constantReps, false); - Trace("model-builder") << " Normalizing rep (" << rep << "), normalized to (" << normalized << ")" << endl; - if (normalized.isConst()) { - changed = true; - done = false; - typeConstSet.add(tb, normalized); - constantReps[*i] = normalized; - assertedReps.erase(*i); - i2 = i; - ++i; - repSet->erase(i2); - } - else { - if (normalized != rep) { - assertedReps[*i] = normalized; - changed = true; - done = false; - } - ++i; - } - } - } - - // 2. Now try to evaluate or assign the EC's in this type set* noRepSet = typeNoRepSet.getSet(t); + + // 1. Try to evaluate the EC's in this type if (noRepSet != NULL && !noRepSet->empty()) { - Trace("model-builder") << " Eval/assign working on type: " << t << endl; - bool assignable, evaluable; + Trace("model-builder") << " Eval phase, working on type: " << t << endl; + bool assignable, evaluable, evaluated; d_normalizedCache.clear(); for (i = noRepSet->begin(); i != noRepSet->end(); ) { i2 = i; ++i; - eq::EqClassIterator eqc_i = eq::EqClassIterator(*i2, &tm->d_equalityEngine); assignable = false; evaluable = false; + evaluated = false; + eq::EqClassIterator eqc_i = eq::EqClassIterator(*i2, &tm->d_equalityEngine); for ( ; !eqc_i.isFinished(); ++eqc_i) { Node n = *eqc_i; if (isAssignable(n)) { @@ -545,55 +514,138 @@ void TheoryEngineModelBuilder::buildModel(Model* m, bool fullModel) evaluable = true; Node normalized = normalize(tm, n, constantReps, true); if (normalized.isConst()) { - typeConstSet.add(t.getBaseType(), normalized); + typeConstSet.add(tb, normalized); constantReps[*i2] = normalized; Trace("model-builder") << " Eval: Setting constant rep of " << (*i2) << " to " << normalized << endl; changed = true; + evaluated = true; noRepSet->erase(i2); break; } } } - if (assignable) { - // We are about to make a choice - we have to make sure we have learned everything we can first. Only make a choice if: - // 1. fullModel is true - // 2. there are no terms of this type with un-normalized representatives - // 3. there are no evaluable terms in this EC - // Alternatively, if 2 or 3 don't hold but we are in a special deadlock-breaking mode, go ahead and make one assignment - if (fullModel && (((repSet == NULL || repSet->empty()) && !evaluable) || assignOne)) { - assignOne = false; - Assert(!t.isBoolean() || (*i2).getKind() == kind::APPLY_UF); - Node n; - if (t.getCardinality().isInfinite()) { - n = typeConstSet.nextTypeEnum(t, true); - } - else { - TypeEnumerator te(t); - n = *te; - } - Assert(!n.isNull()); - constantReps[*i2] = n; - Trace("model-builder") << " Assign: Setting constant rep of " << (*i2) << " to " << n << endl; - changed = true; - noRepSet->erase(i2); + if (!evaluated) { + if (evaluable) { + evaluableSet.insert(tb); } - else { + if (assignable) { unassignedAssignable = true; } } } } + + // 2. Normalize any non-const representative terms for this type + set* repSet = typeRepSet.getSet(t); + if (repSet != NULL && !repSet->empty()) { + Trace("model-builder") << " Normalization phase, working on type: " << t << endl; + d_normalizedCache.clear(); + for (i = repSet->begin(); i != repSet->end(); ) { + Assert(assertedReps.find(*i) != assertedReps.end()); + Node rep = assertedReps[*i]; + Node normalized = normalize(tm, rep, constantReps, false); + Trace("model-builder") << " Normalizing rep (" << rep << "), normalized to (" << normalized << ")" << endl; + if (normalized.isConst()) { + changed = true; + typeConstSet.add(t.getBaseType(), normalized); + constantReps[*i] = normalized; + assertedReps.erase(*i); + i2 = i; + ++i; + repSet->erase(i2); + } + else { + if (normalized != rep) { + assertedReps[*i] = normalized; + changed = true; + } + ++i; + } + } + } } } while (changed); - if (!unassignedAssignable || !fullModel) { + + if (!fullModel || !unassignedAssignable) { break; } + + // 3. Assign unassigned assignable EC's using type enumeration - assign a value *different* from all other EC's if the type is infinite + // Assign first value from type enumerator otherwise - for finite types, we rely on polite framework to ensure that EC's that have to be + // different are different. + + // Only make assignments on a type if: + // 1. fullModel is true + // 2. there are no terms that share the same base type with un-normalized representatives + // 3. there are no terms that share teh same base type that are unevaluated evaluable terms + // Alternatively, if 2 or 3 don't hold but we are in a special deadlock-breaking mode where assignOne is true, go ahead and make one assignment + changed = false; + for (it = typeNoRepSet.begin(); it != typeNoRepSet.end(); ++it) { + set& noRepSet = TypeSet::getSet(it); + if (noRepSet.empty()) { + continue; + } + TypeNode t = TypeSet::getType(it); + TypeNode tb = t.getBaseType(); + if (!assignOne) { + set* repSet = typeRepSet.getSet(tb); + if (repSet != NULL && !repSet->empty()) { + continue; + } + if (evaluableSet.find(tb) != evaluableSet.end()) { + continue; + } + } + Trace("model-builder") << " Assign phase, working on type: " << t << endl; + bool assignable, evaluable; + for (i = noRepSet.begin(); i != noRepSet.end(); ) { + i2 = i; + ++i; + eq::EqClassIterator eqc_i = eq::EqClassIterator(*i2, &tm->d_equalityEngine); + assignable = false; + evaluable = false; + for ( ; !eqc_i.isFinished(); ++eqc_i) { + Node n = *eqc_i; + if (isAssignable(n)) { + assignable = true; + } + else { + evaluable = true; + } + } + if (assignable) { + Assert(!evaluable || assignOne); + Assert(!t.isBoolean() || (*i2).getKind() == kind::APPLY_UF); + Node n; + if (t.getCardinality().isInfinite()) { + n = typeConstSet.nextTypeEnum(t, true); + } + else { + TypeEnumerator te(t); + n = *te; + } + Assert(!n.isNull()); + constantReps[*i2] = n; + Trace("model-builder") << " Assign: Setting constant rep of " << (*i2) << " to " << n << endl; + changed = true; + noRepSet.erase(i2); + if (assignOne) { + assignOne = false; + break; + } + } + } + } + // Corner case - I'm not sure this can even happen - but it's theoretically possible to have a cyclical dependency // in EC assignment/evaluation, e.g. EC1 = {a, b + 1}; EC2 = {b, a - 1}. In this case, neither one will get assigned because we are waiting // to be able to evaluate. But we will never be able to evaluate because the variables that need to be assigned are in // these same EC's. In this case, repeat the whole fixed-point computation with the difference that the first EC // that has both assignable and evaluable expressions will get assigned. - assignOne = true; + if (!changed) { + Assert(!assignOne); // check for infinite loop! + assignOne = true; + } } #ifdef CVC4_ASSERTIONS diff --git a/src/theory/model.h b/src/theory/model.h index d17192281..19415ae7b 100644 --- a/src/theory/model.h +++ b/src/theory/model.h @@ -216,6 +216,11 @@ private: return n; } + bool empty() + { + return d_typeSet.empty(); + } + iterator begin() { return d_typeSet.begin(); diff --git a/src/theory/rewriterules/theory_rewriterules.h b/src/theory/rewriterules/theory_rewriterules.h index 4a27b4559..e7a24bb79 100644 --- a/src/theory/rewriterules/theory_rewriterules.h +++ b/src/theory/rewriterules/theory_rewriterules.h @@ -30,7 +30,6 @@ #include "theory/rewriterules/rr_inst_match.h" #include "util/statistics_registry.h" #include "theory/rewriterules/theory_rewriterules_preprocess.h" -#include "theory/model.h" namespace CVC4 { namespace theory { diff --git a/src/theory/shared_terms_database.cpp b/src/theory/shared_terms_database.cpp index a8e4485e0..ced845a27 100644 --- a/src/theory/shared_terms_database.cpp +++ b/src/theory/shared_terms_database.cpp @@ -261,7 +261,3 @@ Node SharedTermsDatabase::explain(TNode literal) const { d_equalityEngine.explainEquality(atom[0], atom[1], polarity, assumptions); return mkAnd(assumptions); } - -void SharedTermsDatabase::collectModelInfo( theory::TheoryModel* m, bool fullModel ){ - m->assertEqualityEngine( &d_equalityEngine ); -} diff --git a/src/theory/shared_terms_database.h b/src/theory/shared_terms_database.h index a1217d5c6..655918986 100644 --- a/src/theory/shared_terms_database.h +++ b/src/theory/shared_terms_database.h @@ -241,10 +241,6 @@ public: */ theory::eq::EqualityEngine* getEqualityEngine() { return &d_equalityEngine; } - /** - * collect model info - */ - void collectModelInfo( theory::TheoryModel* m, bool fullModel ); protected: /** diff --git a/src/theory/theory_engine.h b/src/theory/theory_engine.h index c65fb7ed7..67830390c 100644 --- a/src/theory/theory_engine.h +++ b/src/theory/theory_engine.h @@ -43,7 +43,6 @@ #include "util/cvc4_assert.h" #include "theory/ite_simplifier.h" #include "theory/unconstrained_simplifier.h" -#include "theory/model.h" namespace CVC4 { @@ -75,6 +74,8 @@ struct NodeTheoryPairHashFunction { namespace theory { class Instantiator; + class TheoryModel; + class TheoryEngineModelBuilder; }/* CVC4::theory namespace */ class DecisionEngine; diff --git a/src/theory/uf/theory_uf_strong_solver.cpp b/src/theory/uf/theory_uf_strong_solver.cpp index edeb6b6ec..0ec89af0b 100644 --- a/src/theory/uf/theory_uf_strong_solver.cpp +++ b/src/theory/uf/theory_uf_strong_solver.cpp @@ -19,6 +19,7 @@ #include "theory/theory_engine.h" #include "theory/quantifiers/term_database.h" #include "theory/uf/options.h" +#include "theory/model.h" //#define ONE_SPLIT_REGION //#define DISABLE_QUICK_CLIQUE_CHECKS diff --git a/test/regress/regress0/auflia/Makefile.am b/test/regress/regress0/auflia/Makefile.am index ed810eaeb..e35f24d13 100644 --- a/test/regress/regress0/auflia/Makefile.am +++ b/test/regress/regress0/auflia/Makefile.am @@ -18,7 +18,8 @@ TESTS = \ fuzz01.delta01.smt \ fuzz02.smt \ fuzz03.smt \ - fuzz04.smt + fuzz04.smt \ + fuzz05.smt EXTRA_DIST = $(TESTS) diff --git a/test/regress/regress0/auflia/fuzz05.smt b/test/regress/regress0/auflia/fuzz05.smt new file mode 100644 index 000000000..538f86ece --- /dev/null +++ b/test/regress/regress0/auflia/fuzz05.smt @@ -0,0 +1,183 @@ +(benchmark fuzzsmt +:logic QF_AUFLIA +:status sat +:extrafuns ((f0 Int Int Int)) +:extrafuns ((f1 Array Array Array Array)) +:extrapreds ((p0 Int)) +:extrapreds ((p1 Array Array Array)) +:extrafuns ((v0 Int)) +:extrafuns ((v1 Int)) +:extrafuns ((v2 Int)) +:extrafuns ((v3 Array)) +:formula +(let (?e4 2) +(let (?e5 (- v2 v2)) +(let (?e6 (f0 v1 v0)) +(let (?e7 (* ?e6 ?e4)) +(let (?e8 (ite (p0 v2) 1 0)) +(let (?e9 (f1 v3 v3 v3)) +(flet ($e10 (p1 ?e9 v3 v3)) +(flet ($e11 (> ?e7 v1)) +(flet ($e12 (<= ?e8 ?e6)) +(flet ($e13 (p0 ?e8)) +(flet ($e14 (>= v2 v0)) +(flet ($e15 (p0 ?e5)) +(let (?e16 (ite $e12 v3 ?e9)) +(let (?e17 (ite $e15 ?e16 v3)) +(let (?e18 (ite $e11 ?e17 ?e16)) +(let (?e19 (ite $e14 ?e9 ?e9)) +(let (?e20 (ite $e13 ?e16 v3)) +(let (?e21 (ite $e12 v3 ?e19)) +(let (?e22 (ite $e10 ?e16 v3)) +(let (?e23 (ite $e15 ?e5 v0)) +(let (?e24 (ite $e12 v1 ?e6)) +(let (?e25 (ite $e11 ?e6 v0)) +(let (?e26 (ite $e15 ?e25 ?e23)) +(let (?e27 (ite $e12 v1 v0)) +(let (?e28 (ite $e14 ?e23 ?e24)) +(let (?e29 (ite $e10 ?e6 ?e23)) +(let (?e30 (ite $e13 v2 ?e29)) +(let (?e31 (ite $e12 ?e7 ?e25)) +(let (?e32 (ite $e12 ?e8 ?e8)) +(let (?e33 (store v3 ?e27 ?e7)) +(let (?e34 (select ?e21 ?e30)) +(let (?e35 (f1 ?e9 ?e21 ?e18)) +(let (?e36 (f1 ?e9 ?e17 v3)) +(let (?e37 (f1 ?e18 ?e21 ?e19)) +(let (?e38 (f1 ?e33 ?e18 ?e35)) +(let (?e39 (f1 ?e22 ?e22 v3)) +(let (?e40 (f1 ?e18 ?e20 ?e22)) 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+(flet ($e169 (and $e168 $e168)) +(flet ($e170 (not $e169)) +(flet ($e171 (iff $e167 $e170)) +$e171 +))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))) + diff --git a/test/regress/regress0/uflra/Makefile.am b/test/regress/regress0/uflra/Makefile.am index 352161466..60b3109f1 100644 --- a/test/regress/regress0/uflra/Makefile.am +++ b/test/regress/regress0/uflra/Makefile.am @@ -37,7 +37,8 @@ SMT_TESTS = \ incorrect1.delta01.smt \ incorrect1.delta02.smt \ error1.smt \ - neq-deltacomp.smt + neq-deltacomp.smt \ + fuzz01.smt # Regression tests for SMT2 inputs SMT2_TESTS = diff --git a/test/regress/regress0/uflra/fuzz01.smt b/test/regress/regress0/uflra/fuzz01.smt new file mode 100644 index 000000000..2c6286e3a --- /dev/null +++ b/test/regress/regress0/uflra/fuzz01.smt @@ -0,0 +1,257 @@ +(benchmark fuzzsmt +:logic QF_UFLRA +:status sat +:extrafuns ((f0 Real Real)) +:extrafuns 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