Merge remote-tracking branch 'origin/develop' into breaking

.circleci/config.yml

@@ -347,7 +347,7 @@ jobs:
 
   chk_pylint:
     docker:
-      - image: buildpack-deps:eoan
+      - image: buildpack-deps:focal
     steps:
       - checkout
       - run:
@@ -363,7 +363,7 @@ jobs:
 
   chk_antlr_grammar:
     docker:
-      - image: buildpack-deps:eoan
+      - image: buildpack-deps:focal
     steps:
       - checkout
       - run:
@@ -802,173 +802,43 @@ jobs:
             npm --version
             test/externalTests/solc-js/solc-js.sh /tmp/workspace/soljson.js $(cat /tmp/workspace/version.txt)
 
-  t_ems_compile_ext_gnosis:
+  t_ems_ext:
+    parameters:
+      project:
+        type: string
+      compile_only:
+        type: integer
+        default: 0
+      nodejs_version:
+        type: integer
+        default: 14
+      gitter_notify:
+        type: boolean
+        default: no
     docker:
-      - image: circleci/node:14
+      - image: circleci/node:<<parameters.nodejs_version>>
     environment:
       TERM: xterm
+      COMPILE_ONLY: <<parameters.compile_only>>
     steps:
       - checkout
       - attach_workspace:
           at: /tmp/workspace
       - run:
-          name: External GnosisSafe compilation
+          name: Install dependencies
-          command: |
-            export COMPILE_ONLY=1
-            test/externalTests/gnosis.sh /tmp/workspace/soljson.js
-
-  t_ems_test_ext_gnosis:
-    docker:
-      # NOTE: Tests do not start on node.js 14 ("ganache-cli exited early with code 1").
-      - image: circleci/node:12
-    environment:
-      TERM: xterm
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - run:
-          name: External GnosisSafe tests
-          command: |
-            test/externalTests/gnosis.sh /tmp/workspace/soljson.js
-
-  t_ems_compile_ext_gnosis_v2:
-    docker:
-      - image: circleci/node:14
-    environment:
-      TERM: xterm
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - run:
-          name: External GnosisSafe v2 compilation
-          command: |
-            export COMPILE_ONLY=1
-            test/externalTests/gnosis-v2.sh /tmp/workspace/soljson.js
-
-  t_ems_test_ext_gnosis_v2:
-    docker:
-      # NOTE: Tests do not start on node.js 14 ("ganache-cli exited early with code 1").
-      - image: circleci/node:12
-    environment:
-      TERM: xterm
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - run:
-          name: External GnosisSafe v2 tests
-          command: |
-            test/externalTests/gnosis-v2.sh /tmp/workspace/soljson.js
-
-  t_ems_compile_ext_zeppelin:
-    docker:
-      - image: circleci/node:14
-    environment:
-      TERM: xterm
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - run:
-          name: External Zeppelin compilation
-          command: |
-            export COMPILE_ONLY=1
-            test/externalTests/zeppelin.sh /tmp/workspace/soljson.js
-
-  t_ems_test_ext_zeppelin:
-    docker:
-      - image: circleci/node:14
-    environment:
-      TERM: xterm
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - run:
-          name: External Zeppelin tests
-          command: |
-            test/externalTests/zeppelin.sh /tmp/workspace/soljson.js
-
-  t_ems_compile_ext_colony:
-    docker:
-      - image: circleci/node:14
-    environment:
-      TERM: xterm
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - run:
-          name: Install test dependencies
           command: |
+            # lsof is used by Colony in its stop-blockchain-client.sh script
             sudo apt-get -qy install lsof
       - run:
-          name: External ColonyNetworks compilation
+          name: External <<parameters.project>> tests
           command: |
-            export COMPILE_ONLY=1
+            test/externalTests/<<parameters.project>>.sh /tmp/workspace/soljson.js
-            test/externalTests/colony.sh /tmp/workspace/soljson.js
+      - when:
-
+          condition: <<parameters.gitter_notify>>
-  t_ems_test_ext_colony:
-    docker:
-      - image: circleci/node:14
-    environment:
-      TERM: xterm
           steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - run:
-          name: Install test dependencies
-          command: |
-            sudo apt-get -qy install lsof
-      - run:
-          name: External ColonyNetworks tests
-          command: |
-            test/externalTests/colony.sh /tmp/workspace/soljson.js
             - run: *gitter_notify_failure
             - run: *gitter_notify_success
 
-  t_ems_compile_ext_ens:
-    docker:
-      # NOTE: One of the dependencies (fsevents) fails to build its native extension on node.js 12+.
-      - image: circleci/node:10
-    environment:
-      TERM: xterm
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - run:
-          name: Install test dependencies
-          command: |
-            sudo apt-get -qy install lsof
-      - run:
-          name: External Ens compilation
-          command: |
-            export COMPILE_ONLY=1
-            test/externalTests/ens.sh /tmp/workspace/soljson.js
-
-  t_ems_test_ext_ens:
-    docker:
-      # NOTE: One of the dependencies (fsevents) fails to build its native extension on node.js 12+.
-      - image: circleci/node:10
-    environment:
-      TERM: xterm
-    steps:
-      - checkout
-      - attach_workspace:
-          at: /tmp/workspace
-      - run:
-          name: Install test dependencies
-          command: |
-            sudo apt-get -qy install lsof
-      - run:
-          name: External Ens compilation
-          command: |
-            test/externalTests/ens.sh /tmp/workspace/soljson.js
-
   b_win: &b_win
     executor:
       name: win/default
@@ -1149,17 +1019,59 @@ workflows:
       # Emscripten build and tests that take 15 minutes or less
       - b_ems: *workflow_trigger_on_tags
       - t_ems_solcjs: *workflow_emscripten
-      - t_ems_compile_ext_colony: *workflow_emscripten
+
-      - t_ems_compile_ext_gnosis: *workflow_emscripten
+      - t_ems_ext:
-      - t_ems_compile_ext_gnosis_v2: *workflow_emscripten
+          <<: *workflow_emscripten
-      - t_ems_compile_ext_zeppelin: *workflow_emscripten
+          name: t_ems_compile_ext_colony
-      - t_ems_compile_ext_ens: *workflow_emscripten
+          project: colony
+          compile_only: 1
+      - t_ems_ext:
+          <<: *workflow_emscripten
+          name: t_ems_compile_ext_gnosis
+          project: gnosis
+          compile_only: 1
+      - t_ems_ext:
+          <<: *workflow_emscripten
+          name: t_ems_compile_ext_gnosis_v2
+          project: gnosis-v2
+          compile_only: 1
+      - t_ems_ext:
+          <<: *workflow_emscripten
+          name: t_ems_compile_ext_zeppelin
+          project: zeppelin
+          compile_only: 1
+      - t_ems_ext:
+          <<: *workflow_emscripten
+          name: t_ems_compile_ext_ens
+          project: ens
+          compile_only: 1
+          # NOTE: One of the dependencies (fsevents) fails to build its native extension on node.js 12+.
+          nodejs_version: 10
+
       # FIXME: Gnosis tests are pretty flaky right now. They often fail on CircleCI due to random ProviderError
       # and there are also other less frequent problems. See https://github.com/gnosis/safe-contracts/issues/216.
-      #- t_ems_test_ext_gnosis: *workflow_emscripten
+      #- t_ems_ext:
-      - t_ems_test_ext_gnosis_v2: *workflow_emscripten
+      #    <<: *workflow_emscripten
-      - t_ems_test_ext_zeppelin: *workflow_emscripten
+      #    name: t_ems_test_ext_gnosis
-      - t_ems_test_ext_ens: *workflow_emscripten
+      #    project: gnosis
+      #    # NOTE: Tests do not start on node.js 14 ("ganache-cli exited early with code 1").
+      #    nodejs_version: 12
+      - t_ems_ext:
+          <<: *workflow_emscripten
+          name: t_ems_test_ext_gnosis_v2
+          project: gnosis-v2
+          # NOTE: Tests do not start on node.js 14 ("ganache-cli exited early with code 1").
+          nodejs_version: 12
+      - t_ems_ext:
+          <<: *workflow_emscripten
+          name: t_ems_test_ext_zeppelin
+          project: zeppelin
+      - t_ems_ext:
+          <<: *workflow_emscripten
+          name: t_ems_test_ext_ens
+          project: ens
+          # NOTE: One of the dependencies (fsevents) fails to build its native extension on node.js 12+.
+          nodejs_version: 10
 
       # Windows build and tests
       - b_win: *workflow_trigger_on_tags
@@ -1216,4 +1128,8 @@ workflows:
 
       # Emscripten build and tests that take more than 15 minutes to execute
       - b_ems: *workflow_trigger_on_tags
-      - t_ems_test_ext_colony: *workflow_emscripten
+      - t_ems_ext:
+          <<: *workflow_emscripten
+          name: t_ems_test_ext_colony
+          project: colony
+          gitter_notify: yes

Changelog.md

@@ -46,19 +46,21 @@ Language Features:
 
 Compiler Features:
  * Code Generator: Avoid memory allocation for default value if it is not used.
+ * SMTChecker: Report struct values in counterexamples from CHC engine.
+ * SMTChecker: Support early returns in the CHC engine.
+ * SMTChecker: Support getters.
  * SMTChecker: Support named arguments in function calls.
  * SMTChecker: Support struct constructor.
- * SMTChecker: Support getters.
+ * Standard-Json: Move the recently introduced ``modelCheckerSettings`` key to ``settings.modelChecker``.
- * SMTChecker: Support early returns in the CHC engine.
- * SMTChecker: Report struct values in counterexamples from CHC engine.
  * Standard-Json: Properly filter the requested output artifacts.
 
 Bugfixes:
  * Code generator: Do not pad empty string literals with a single 32-byte zero field in the ABI coder v1.
+ * NatSpec: Fix segfault when inheriting return parameter documentation for modifiers with no parameters.
+ * SMTChecker: Fix cast string literals to byte arrays.
  * SMTChecker: Fix internal compiler error when doing bitwise compound assignment with string literals.
  * SMTChecker: Fix internal error when trying to generate counterexamples with old z3.
  * SMTChecker: Fix segmentation fault that could occur on certain SMT-enabled sources when no SMT solver was available.
- * SMTChecker: Fix cast string literals to byte arrays.
  * Type Checker: ``super`` is not available in libraries.
  * Yul Optimizer: Fix a bug in NameSimplifier where a new name created by NameSimplifier could also be created by NameDispenser.
  * Yul Optimizer: Removed NameSimplifier from optimization steps available to users.

docs/using-the-compiler.rst

@@ -368,8 +368,7 @@ Input Description
             "MyContract": [ "abi", "evm.bytecode.opcodes" ]
           }
         },
-      },
+        "modelChecker":
-      "modelCheckerSettings":
         {
           // Choose which model checker engine to use: all (default), bmc, chc, none.
           "engine": "chc",
@@ -380,6 +379,7 @@ Input Description
           "timeout": 20000
         }
       }
+    }
 
 
 Output Description

libsolidity/analysis/DocStringAnalyser.cpp

@@ -42,7 +42,15 @@ void copyMissingTags(set<CallableDeclaration const*> const& _baseFunctions, Stru
 	if (_baseFunctions.size() != 1)
 		return;
 
-	auto& sourceDoc = dynamic_cast<StructurallyDocumentedAnnotation const&>((*_baseFunctions.begin())->annotation());
+	CallableDeclaration const& baseFunction = **_baseFunctions.begin();
+
+	auto hasReturnParameter = [](CallableDeclaration const& declaration, size_t _n)
+	{
+		return declaration.returnParameterList() &&
+			declaration.returnParameters().size() > _n;
+	};
+
+	auto& sourceDoc = dynamic_cast<StructurallyDocumentedAnnotation const&>(baseFunction.annotation());
 
 	for (auto it = sourceDoc.docTags.begin(); it != sourceDoc.docTags.end();)
 	{
@@ -66,9 +74,15 @@ void copyMissingTags(set<CallableDeclaration const*> const& _baseFunctions, Stru
 				size_t docParaNameEndPos = content.content.find_first_of(" \t");
 				string const docParameterName = content.content.substr(0, docParaNameEndPos);
 
-				if (docParameterName != _declaration->returnParameters().at(n)->name())
+				if (
+					hasReturnParameter(*_declaration, n) &&
+					docParameterName != _declaration->returnParameters().at(n)->name()
+				)
 				{
-					bool baseHasNoName = (*_baseFunctions.begin())->returnParameters().at(n)->name().empty();
+					bool baseHasNoName =
+						hasReturnParameter(baseFunction, n) &&
+						baseFunction.returnParameters().at(n)->name().empty();
+
 					string paramName = _declaration->returnParameters().at(n)->name();
 					content.content =
 						(paramName.empty() ? "" : std::move(paramName) + " ") + (

libsolidity/analysis/DocStringTagParser.cpp

@@ -127,10 +127,13 @@ void DocStringTagParser::handleCallable(
 )
 {
 	static set<string> const validEventTags = set<string>{"dev", "notice", "return", "param"};
+	static set<string> const validModifierTags = set<string>{"dev", "notice", "param", "inheritdoc"};
 	static set<string> const validTags = set<string>{"dev", "notice", "return", "param", "inheritdoc"};
 
 	if (dynamic_cast<EventDefinition const*>(&_callable))
 		parseDocStrings(_node, _annotation, validEventTags, "events");
+	else if (dynamic_cast<ModifierDefinition const*>(&_callable))
+		parseDocStrings(_node, _annotation, validModifierTags, "modifiers");
 	else
 		parseDocStrings(_node, _annotation, validTags, "functions");
 

libsolidity/formal/BMC.cpp

@@ -58,6 +58,10 @@ void BMC::analyze(SourceUnit const& _source, map<ASTNode const*, set<Verificatio
 {
 	solAssert(_source.annotation().experimentalFeatures.count(ExperimentalFeature::SMTChecker), "");
 
+	/// This is currently used to abort analysis of SourceUnits
+	/// containing file level functions or constants.
+	if (SMTEncoder::analyze(_source))
+	{
 		m_solvedTargets = move(_solvedTargets);
 		m_context.setSolver(m_interface.get());
 		m_context.clear();
@@ -65,6 +69,7 @@ void BMC::analyze(SourceUnit const& _source, map<ASTNode const*, set<Verificatio
 		m_variableUsage.setFunctionInlining(shouldInlineFunctionCall);
 
 		_source.accept(*this);
+	}
 
 	solAssert(m_interface->solvers() > 0, "");
 	// If this check is true, Z3 and CVC4 are not available

libsolidity/formal/CHC.cpp

@@ -69,6 +69,10 @@ void CHC::analyze(SourceUnit const& _source)
 {
 	solAssert(_source.annotation().experimentalFeatures.count(ExperimentalFeature::SMTChecker), "");
 
+	/// This is currently used to abort analysis of SourceUnits
+	/// containing file level functions or constants.
+	if (SMTEncoder::analyze(_source))
+	{
 		resetSourceAnalysis();
 
 		set<SourceUnit const*, EncodingContext::IdCompare> sources;
@@ -81,6 +85,7 @@ void CHC::analyze(SourceUnit const& _source)
 			source->accept(*this);
 
 		checkVerificationTargets();
+	}
 
 	bool ranSolver = true;
 #ifndef HAVE_Z3
@@ -1382,8 +1387,7 @@ void CHC::checkAndReportTarget(
 			m_errorReporter.warning(
 				_errorReporterId,
 				location,
-				"CHC: " + _satMsg,
+				"CHC: " + _satMsg + "\nCounterexample:\n" + *cex
-				SecondarySourceLocation().append("Counterexample:\n" + *cex, SourceLocation{})
 			);
 		else
 			m_errorReporter.warning(

libsolidity/formal/SMTEncoder.cpp

@@ -40,6 +40,38 @@ SMTEncoder::SMTEncoder(smt::EncodingContext& _context):
 {
 }
 
+bool SMTEncoder::analyze(SourceUnit const& _source)
+{
+	set<SourceUnit const*, smt::EncodingContext::IdCompare> sources;
+	sources.insert(&_source);
+	for (auto const& source: _source.referencedSourceUnits(true))
+		sources.insert(source);
+
+	bool analysis = true;
+	for (auto source: sources)
+		for (auto node: source->nodes())
+			if (auto function = dynamic_pointer_cast<FunctionDefinition>(node))
+			{
+				m_errorReporter.warning(
+					6660_error,
+					function->location(),
+					"Model checker analysis was not possible because file level functions are not supported."
+				);
+				analysis = false;
+			}
+			else if (auto var = dynamic_pointer_cast<VariableDeclaration>(node))
+			{
+				m_errorReporter.warning(
+					8195_error,
+					var->location(),
+					"Model checker analysis was not possible because file level constants are not supported."
+				);
+				analysis = false;
+			}
+
+	return analysis;
+}
+
 bool SMTEncoder::visit(ContractDefinition const& _contract)
 {
 	solAssert(m_currentContract, "");

libsolidity/formal/SMTEncoder.h

@@ -52,6 +52,9 @@ class SMTEncoder: public ASTConstVisitor
 public:
 	SMTEncoder(smt::EncodingContext& _context);
 
+	/// @returns true if engine should proceed with analysis.
+	bool analyze(SourceUnit const& _sources);
+
 	/// @returns the leftmost identifier in a multi-d IndexAccess.
 	static Expression const* leftmostBase(IndexAccess const& _indexAccess);
 

libsolidity/interface/StandardCompiler.cpp

@@ -410,7 +410,7 @@ std::optional<Json::Value> checkKeys(Json::Value const& _input, set<string> cons
 
 std::optional<Json::Value> checkRootKeys(Json::Value const& _input)
 {
-	static set<string> keys{"auxiliaryInput", "language", "modelCheckerSettings", "settings", "sources"};
+	static set<string> keys{"auxiliaryInput", "language", "settings", "sources"};
 	return checkKeys(_input, keys, "root");
 }
 
@@ -428,14 +428,14 @@ std::optional<Json::Value> checkAuxiliaryInputKeys(Json::Value const& _input)
 
 std::optional<Json::Value> checkSettingsKeys(Json::Value const& _input)
 {
-	static set<string> keys{"parserErrorRecovery", "debug", "evmVersion", "libraries", "metadata", "optimizer", "outputSelection", "remappings", "stopAfter", "viaIR"};
+	static set<string> keys{"parserErrorRecovery", "debug", "evmVersion", "libraries", "metadata", "modelChecker", "optimizer", "outputSelection", "remappings", "stopAfter", "viaIR"};
 	return checkKeys(_input, keys, "settings");
 }
 
 std::optional<Json::Value> checkModelCheckerSettingsKeys(Json::Value const& _input)
 {
 	static set<string> keys{"engine", "timeout"};
-	return checkKeys(_input, keys, "modelCheckerSettings");
+	return checkKeys(_input, keys, "modelChecker");
 }
 
 std::optional<Json::Value> checkOptimizerKeys(Json::Value const& _input)
@@ -893,7 +893,7 @@ std::variant<StandardCompiler::InputsAndSettings, Json::Value> StandardCompiler:
 			"Requested output selection conflicts with \"settings.stopAfter\"."
 		);
 
-	Json::Value const& modelCheckerSettings = _input.get("modelCheckerSettings", Json::Value());
+	Json::Value const& modelCheckerSettings = settings.get("modelChecker", Json::Value());
 
 	if (auto result = checkModelCheckerSettingsKeys(modelCheckerSettings))
 		return *result;
@@ -901,7 +901,7 @@ std::variant<StandardCompiler::InputsAndSettings, Json::Value> StandardCompiler:
 	if (modelCheckerSettings.isMember("engine"))
 	{
 		if (!modelCheckerSettings["engine"].isString())
-			return formatFatalError("JSONError", "modelCheckerSettings.engine must be a string.");
+			return formatFatalError("JSONError", "settings.modelChecker.engine must be a string.");
 		std::optional<ModelCheckerEngine> engine = ModelCheckerEngine::fromString(modelCheckerSettings["engine"].asString());
 		if (!engine)
 			return formatFatalError("JSONError", "Invalid model checker engine requested.");
@@ -911,7 +911,7 @@ std::variant<StandardCompiler::InputsAndSettings, Json::Value> StandardCompiler:
 	if (modelCheckerSettings.isMember("timeout"))
 	{
 		if (!modelCheckerSettings["timeout"].isUInt())
-			return formatFatalError("JSONError", "modelCheckerSettings.timeout must be an unsigned integer.");
+			return formatFatalError("JSONError", "settings.modelChecker.timeout must be an unsigned integer.");
 		ret.modelCheckerSettings.timeout = modelCheckerSettings["timeout"].asUInt();
 	}
 

libsolutil/CommonData.h

@@ -163,6 +163,22 @@ auto applyMap(Container const& _c, Callable&& _op, OutputContainer _oc = OutputC
 	return _oc;
 }
 
+/// Filter a vector.
+/// Returns a copy of the vector after only taking indices `i` such that `_mask[i]` is true.
+template<typename T>
+std::vector<T> filter(std::vector<T> const& _vec, std::vector<bool> const& _mask)
+{
+	assert(_vec.size() == _mask.size());
+
+	std::vector<T> ret;
+
+	for (size_t i = 0; i < _mask.size(); ++i)
+		if (_mask[i])
+			ret.push_back(_vec[i]);
+
+	return ret;
+}
+
 /// Functional fold.
 /// Given a container @param _c, an initial value @param _acc,
 /// and a binary operator @param _binaryOp(T, U), accumulate

libyul/CMakeLists.txt

@@ -189,6 +189,7 @@ add_library(yul
 	optimiser/UnusedFunctionParameterPruner.cpp
 	optimiser/UnusedFunctionParameterPruner.h
 	optimiser/UnusedFunctionsCommon.h
+	optimiser/UnusedFunctionsCommon.cpp
 	optimiser/UnusedPruner.cpp
 	optimiser/UnusedPruner.h
 	optimiser/VarDeclInitializer.cpp

libyul/optimiser/UnusedFunctionsCommon.cpp

@@ -0,0 +1,77 @@
+/*
+	This file is part of solidity.
+
+	solidity is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	solidity is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with solidity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+// SPDX-License-Identifier: GPL-3.0
+
+#include <libyul/optimiser/UnusedFunctionsCommon.h>
+
+#include <libyul/Dialect.h>
+
+#include <liblangutil/SourceLocation.h>
+
+#include <libsolutil/CommonData.h>
+
+using namespace solidity;
+using namespace solidity::util;
+using namespace solidity::yul;
+using namespace solidity::yul::unusedFunctionsCommon;
+
+FunctionDefinition unusedFunctionsCommon::createLinkingFunction(
+	FunctionDefinition const& _original,
+	std::pair<std::vector<bool>, std::vector<bool>> const& _usedParametersAndReturns,
+	YulString const& _originalFunctionName,
+	YulString const& _linkingFunctionName,
+	NameDispenser& _nameDispenser
+)
+{
+	auto generateTypedName = [&](TypedName t)
+	{
+		return TypedName{
+			t.location,
+			_nameDispenser.newName(t.name),
+			t.type
+		};
+	};
+
+	langutil::SourceLocation loc = _original.location;
+
+	FunctionDefinition linkingFunction{
+		loc,
+		_linkingFunctionName,
+		util::applyMap(_original.parameters, generateTypedName),
+		util::applyMap(_original.returnVariables, generateTypedName),
+		{loc, {}} // body
+	};
+
+	FunctionCall call{loc, Identifier{loc, _originalFunctionName}, {}};
+	for (auto const& p: filter(linkingFunction.parameters, _usedParametersAndReturns.first))
+		call.arguments.emplace_back(Identifier{loc, p.name});
+
+	Assignment assignment{loc, {}, nullptr};
+
+	for (auto const& r: filter(linkingFunction.returnVariables, _usedParametersAndReturns.second))
+		assignment.variableNames.emplace_back(Identifier{loc, r.name});
+
+	if (assignment.variableNames.empty())
+		linkingFunction.body.statements.emplace_back(ExpressionStatement{loc, std::move(call)});
+	else
+	{
+		assignment.value = std::make_unique<Expression>(std::move(call));
+		linkingFunction.body.statements.emplace_back(std::move(assignment));
+	}
+
+	return linkingFunction;
+}

libyul/optimiser/UnusedFunctionsCommon.h

@@ -19,85 +19,42 @@
 
 #include <libyul/optimiser/Metrics.h>
 #include <libyul/optimiser/NameDispenser.h>
+
 #include <libyul/AST.h>
-#include <libyul/Dialect.h>
-#include <libyul/Exceptions.h>
-
-#include <liblangutil/SourceLocation.h>
-
-#include <libsolutil/CommonData.h>
-
-#include <variant>
 
 namespace solidity::yul::unusedFunctionsCommon
 {
 
-template<typename T>
-std::vector<T> filter(std::vector<T> const& _vec, std::vector<bool> const& _mask)
-{
-	yulAssert(_vec.size() == _mask.size(), "");
-
-	std::vector<T> ret;
-
-	for (size_t i = 0; i < _mask.size(); ++i)
-		if (_mask[i])
-			ret.push_back(_vec[i]);
-
-	return ret;
-}
-
 /// Returns true if applying UnusedFunctionParameterPruner is not helpful or redundant because the
 /// inliner will be able to handle it anyway.
-bool tooSimpleToBePruned(FunctionDefinition const& _f)
+inline bool tooSimpleToBePruned(FunctionDefinition const& _f)
 {
 	return _f.body.statements.size() <= 1 && CodeSize::codeSize(_f.body) <= 1;
 }
 
+/// Given a function definition `_original`, this function returns a 'linking' function that calls
+/// `_originalFunctionName` (with reduced parameters and return values).
+///
+/// The parameter `_usedParametersAndReturnVariables` is a pair of boolean-vectors. Its `.first`
+/// corresponds to function parameters and its `.second` corresponds to function return-variables. A
+/// false value at index `i` means that the corresponding function parameter / return-variable at
+/// index `i` is unused.
+///
+/// Example:
+///
+/// Let `_original` be the function `function f_1() -> y { }`. (In practice, this function usually cannot
+/// be inlined and has parameters / return-variables that are unused.)
+/// Let `_usedParametersAndReturnVariables` be `({}, {false})`
+/// Let `_originalFunctionName` be `f`.
+/// Let `_linkingFunctionName` be `f_1`.
+///
+/// Then the returned linking function would be `function f_1() -> y_1 { f() }`
 FunctionDefinition createLinkingFunction(
 	FunctionDefinition const& _original,
 	std::pair<std::vector<bool>, std::vector<bool>> const& _usedParametersAndReturns,
 	YulString const& _originalFunctionName,
 	YulString const& _linkingFunctionName,
 	NameDispenser& _nameDispenser
-)
+);
-{
-	auto generateTypedName = [&](TypedName t)
-	{
-		return TypedName{
-			t.location,
-			_nameDispenser.newName(t.name),
-			t.type
-		};
-	};
-
-	langutil::SourceLocation loc = _original.location;
-
-	FunctionDefinition linkingFunction{
-		loc,
-		_linkingFunctionName,
-		util::applyMap(_original.parameters, generateTypedName),
-		util::applyMap(_original.returnVariables, generateTypedName),
-		{loc, {}} // body
-	};
-
-	FunctionCall call{loc, Identifier{loc, _originalFunctionName}, {}};
-	for (auto const& p: filter(linkingFunction.parameters, _usedParametersAndReturns.first))
-		call.arguments.emplace_back(Identifier{loc, p.name});
-
-	Assignment assignment{loc, {}, nullptr};
-
-	for (auto const& r: filter(linkingFunction.returnVariables, _usedParametersAndReturns.second))
-		assignment.variableNames.emplace_back(Identifier{loc, r.name});
-
-	if (assignment.variableNames.empty())
-		linkingFunction.body.statements.emplace_back(ExpressionStatement{loc, std::move(call)});
-	else
-	{
-		assignment.value = std::make_unique<Expression>(std::move(call));
-		linkingFunction.body.statements.emplace_back(std::move(assignment));
-	}
-
-	return linkingFunction;
-}
 
 }

scripts/bytecodecompare/prepare_report.py

@@ -19,10 +19,8 @@ for optimize in [False, True]:
                 'optimizer': {
                     'enabled': optimize
                 },
-                'outputSelection': {'*': {'*': ['evm.bytecode.object', 'metadata']}}
+                'outputSelection': {'*': {'*': ['evm.bytecode.object', 'metadata']}},
-            },
+                'modelChecker': { "engine": 'none' }
-            'modelCheckerSettings': {
-                "engine": 'none'
             }
         }
         args = [SOLC_BIN, '--standard-json']

scripts/bytecodecompare/storebytecode.sh

@@ -66,10 +66,8 @@ for (var optimize of [false, true])
                 sources: inputs,
                 settings: {
                     optimizer: { enabled: optimize },
-                    outputSelection: { '*': { '*': ['evm.bytecode.object', 'metadata'] } }
+                    outputSelection: { '*': { '*': ['evm.bytecode.object', 'metadata'] } },
-                },
+                    "modelChecker": { "engine": "none" }
-                "modelCheckerSettings": {
-                    "engine": "none"
                 }
             }
             var result = JSON.parse(compiler.compile(JSON.stringify(input)))

test/cmdlineTests/model_checker_engine_all/err

@@ -1,9 +1,5 @@
 Warning: CHC: Assertion violation happens here.
- --> model_checker_engine_all/input.sol:6:3:
+Counterexample:
-  |
-6 | 		assert(x > 0);
-  | 		^^^^^^^^^^^^^
-Note: Counterexample:
 
 x = 0
 
@@ -11,3 +7,7 @@ x = 0
 Transaction trace:
 constructor()
 f(0)
+ --> model_checker_engine_all/input.sol:6:3:
+  |
+6 | 		assert(x > 0);
+  | 		^^^^^^^^^^^^^

test/cmdlineTests/model_checker_engine_chc/err

@@ -1,9 +1,5 @@
 Warning: CHC: Assertion violation happens here.
- --> model_checker_engine_chc/input.sol:6:3:
+Counterexample:
-  |
-6 | 		assert(x > 0);
-  | 		^^^^^^^^^^^^^
-Note: Counterexample:
 
 x = 0
 
@@ -11,3 +7,7 @@ x = 0
 Transaction trace:
 constructor()
 f(0)
+ --> model_checker_engine_chc/input.sol:6:3:
+  |
+6 | 		assert(x > 0);
+  | 		^^^^^^^^^^^^^

test/cmdlineTests/standard_model_checker_engine_all/input.json

@@ -7,8 +7,11 @@
 			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\npragma experimental SMTChecker;\ncontract C { function f(uint x) public pure { assert(x > 0); } }"
 		}
 	},
-	"modelCheckerSettings":
+	"settings":
+	{
+		"modelChecker":
 		{
 			"engine": "all"
 		}
 	}
+}

test/cmdlineTests/standard_model_checker_engine_all/output.json

@@ -1,9 +1,5 @@
 {"errors":[{"component":"general","errorCode":"6328","formattedMessage":"Warning: CHC: Assertion violation happens here.
- --> A:4:47:
+Counterexample:
-  |
-4 | contract C { function f(uint x) public pure { assert(x > 0); } }
-  |                                               ^^^^^^^^^^^^^
-Note: Counterexample:
 
 x = 0
 
@@ -11,12 +7,17 @@ x = 0
 Transaction trace:
 constructor()
 f(0)
+ --> A:4:47:
+  |
+4 | contract C { function f(uint x) public pure { assert(x > 0); } }
+  |                                               ^^^^^^^^^^^^^
 
-","message":"CHC: Assertion violation happens here.","secondarySourceLocations":[{"message":"Counterexample:
+","message":"CHC: Assertion violation happens here.
+Counterexample:
 
 x = 0
 
 
 Transaction trace:
 constructor()
-f(0)"}],"severity":"warning","sourceLocation":{"end":150,"file":"A","start":137},"type":"Warning"}],"sources":{"A":{"id":0}}}
+f(0)","severity":"warning","sourceLocation":{"end":150,"file":"A","start":137},"type":"Warning"}],"sources":{"A":{"id":0}}}

test/cmdlineTests/standard_model_checker_engine_bmc/input.json

@@ -7,8 +7,11 @@
 			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\npragma experimental SMTChecker;\ncontract C { function f(uint x) public pure { assert(x > 0); } }"
 		}
 	},
-	"modelCheckerSettings":
+	"settings":
+	{
+		"modelChecker":
 		{
 			"engine": "bmc"
 		}
 	}
+}

test/cmdlineTests/standard_model_checker_engine_chc/input.json

@@ -7,8 +7,11 @@
 			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\npragma experimental SMTChecker;\ncontract C { function f(uint x) public pure { assert(x > 0); } }"
 		}
 	},
-	"modelCheckerSettings":
+	"settings":
+	{
+		"modelChecker":
 		{
 			"engine": "chc"
 		}
 	}
+}

test/cmdlineTests/standard_model_checker_engine_chc/output.json

@@ -1,9 +1,5 @@
 {"errors":[{"component":"general","errorCode":"6328","formattedMessage":"Warning: CHC: Assertion violation happens here.
- --> A:4:47:
+Counterexample:
-  |
-4 | contract C { function f(uint x) public pure { assert(x > 0); } }
-  |                                               ^^^^^^^^^^^^^
-Note: Counterexample:
 
 x = 0
 
@@ -11,12 +7,17 @@ x = 0
 Transaction trace:
 constructor()
 f(0)
+ --> A:4:47:
+  |
+4 | contract C { function f(uint x) public pure { assert(x > 0); } }
+  |                                               ^^^^^^^^^^^^^
 
-","message":"CHC: Assertion violation happens here.","secondarySourceLocations":[{"message":"Counterexample:
+","message":"CHC: Assertion violation happens here.
+Counterexample:
 
 x = 0
 
 
 Transaction trace:
 constructor()
-f(0)"}],"severity":"warning","sourceLocation":{"end":150,"file":"A","start":137},"type":"Warning"}],"sources":{"A":{"id":0}}}
+f(0)","severity":"warning","sourceLocation":{"end":150,"file":"A","start":137},"type":"Warning"}],"sources":{"A":{"id":0}}}

test/cmdlineTests/standard_model_checker_engine_none/input.json

@@ -7,8 +7,11 @@
 			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\npragma experimental SMTChecker;\ncontract C { function f(uint x) public pure { assert(x > 0); } }"
 		}
 	},
-	"modelCheckerSettings":
+	"settings":
+	{
+		"modelChecker":
 		{
 			"engine": "none"
 		}
 	}
+}

test/cmdlineTests/standard_model_checker_timeout_all/input.json

@@ -7,8 +7,11 @@
 			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\npragma experimental SMTChecker;\ncontract test {\nfunction f(uint x, uint y, uint k) public pure {\nrequire(k > 0); require(x % k == 0); require(y % k == 0); uint r = mulmod(x, y, k); assert(r % k == 0);}}"
 		}
 	},
-	"modelCheckerSettings":
+	"settings":
+	{
+		"modelChecker":
 		{
 			"timeout": 1000
 		}
 	}
+}

test/cmdlineTests/standard_model_checker_timeout_bmc/input.json

@@ -7,9 +7,12 @@
 			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\npragma experimental SMTChecker;\ncontract test {\nfunction f(uint x, uint y, uint k) public pure {\nrequire(k > 0); require(x % k == 0); require(y % k == 0); uint r = mulmod(x, y, k); assert(r % k == 0);}}"
 		}
 	},
-	"modelCheckerSettings":
+	"settings":
+	{
+		"modelChecker":
 		{
 			"engine": "bmc",
 			"timeout": 1000
 		}
 	}
+}

test/cmdlineTests/standard_model_checker_timeout_chc/input.json

@@ -7,9 +7,12 @@
 			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\npragma experimental SMTChecker;\ncontract test {\nfunction f(uint x, uint y, uint k) public pure {\nrequire(k > 0); require(x % k == 0); require(y % k == 0); uint r = mulmod(x, y, k); assert(r % k == 0);}}"
 		}
 	},
-	"modelCheckerSettings":
+	"settings":
+	{
+		"modelChecker":
 		{
 			"engine": "chc",
 			"timeout": 1000
 		}
 	}
+}

test/cmdlineTests/standard_model_checker_timeout_wrong_key/input.json

@@ -7,9 +7,12 @@
 			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\npragma experimental SMTChecker;\ncontract C { function f(uint x) public pure { assert(x > 0); } }"
 		}
 	},
-	"modelCheckerSettings":
+	"settings":
+	{
+		"modelChecker":
 		{
 			"engine": "chc",
 			"atimeout": 1
 		}
 	}
+}

test/cmdlineTests/standard_model_checker_timeout_wrong_value/input.json

@@ -7,8 +7,11 @@
 			"content": "// SPDX-License-Identifier: GPL-3.0\npragma solidity >=0.0;\npragma experimental SMTChecker;\ncontract C { function f(uint x) public pure { assert(x > 0); } }"
 		}
 	},
-	"modelCheckerSettings":
+	"settings":
+	{
+		"modelChecker":
 		{
 			"timeout": "asd"
 		}
 	}
+}

test/cmdlineTests/standard_model_checker_timeout_wrong_value/output.json

@@ -1 +1 @@
-{"errors":[{"component":"general","formattedMessage":"modelCheckerSettings.timeout must be an unsigned integer.","message":"modelCheckerSettings.timeout must be an unsigned integer.","severity":"error","type":"JSONError"}]}
+{"errors":[{"component":"general","formattedMessage":"settings.modelChecker.timeout must be an unsigned integer.","message":"settings.modelChecker.timeout must be an unsigned integer.","severity":"error","type":"JSONError"}]}

test/libsolidity/SMTCheckerTest.cpp

@@ -53,6 +53,14 @@ SMTCheckerTest::SMTCheckerTest(string const& _filename): SyntaxTest(_filename, E
 
 	if (m_enabledSolvers.none() || m_modelCheckerSettings.engine.none())
 		m_shouldRun = false;
+
+	auto const& ignoreCex = m_reader.stringSetting("SMTIgnoreCex", "no");
+	if (ignoreCex == "no")
+		m_ignoreCex = false;
+	else if (ignoreCex == "yes")
+		m_ignoreCex = true;
+	else
+		BOOST_THROW_EXCEPTION(runtime_error("Invalid SMT counterexample choice."));
 }
 
 TestCase::TestResult SMTCheckerTest::run(ostream& _stream, string const& _linePrefix, bool _formatted)
@@ -65,3 +73,20 @@ TestCase::TestResult SMTCheckerTest::run(ostream& _stream, string const& _linePr
 
 	return conclude(_stream, _linePrefix, _formatted);
 }
+
+void SMTCheckerTest::filterObtainedErrors()
+{
+	SyntaxTest::filterObtainedErrors();
+
+	static auto removeCex = [](vector<SyntaxTestError>& errors) {
+		for (auto& e: errors)
+			if (
+				auto cexPos = e.message.find("\\nCounterexample");
+				cexPos != string::npos
+			)
+				e.message = e.message.substr(0, cexPos);
+	};
+
+	if (m_ignoreCex)
+		removeCex(m_errorList);
+}

test/libsolidity/SMTCheckerTest.h

@@ -40,6 +40,8 @@ public:
 
 	TestResult run(std::ostream& _stream, std::string const& _linePrefix = "", bool _formatted = false) override;
 
+	void filterObtainedErrors() override;
+
 protected:
 	/// This contains engine and timeout.
 	/// The engine can be set via option SMTEngine in the test.
@@ -51,6 +53,8 @@ protected:
 	/// The possible options are `all`, `z3`, `cvc4`, `none`,
 	/// where if none is given the default used option is `all`.
 	smtutil::SMTSolverChoice m_enabledSolvers;
+
+	bool m_ignoreCex = false;
 };
 
 }

test/libsolidity/SyntaxTest.h

@@ -52,7 +52,7 @@ public:
 protected:
 	void setupCompiler();
 	void parseAndAnalyze() override;
-	void filterObtainedErrors();
+	virtual void filterObtainedErrors();
 
 	bool m_optimiseYul = true;
 	bool m_parserErrorRecovery = false;

test/libsolidity/smtCheckerTests/array_members/array_pop_length_1.sol

@@ -8,4 +8,4 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (82-89): CHC: Empty array "pop" happens here.
+// Warning 2529: (82-89): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/array_pop_length_2.sol

@@ -8,4 +8,4 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (82-89): CHC: Empty array "pop" happens here.
+// Warning 2529: (82-89): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/array_pop_length_3.sol

@@ -8,5 +8,5 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (82-89): CHC: Empty array "pop" happens here.
+// Warning 2529: (82-89): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()
-// Warning 2529: (93-100): CHC: Empty array "pop" happens here.
+// Warning 2529: (93-100): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/array_pop_length_4.sol

@@ -8,4 +8,4 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (94-101): CHC: Empty array "pop" happens here.
+// Warning 2529: (94-101): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/array_pop_length_5.sol

@@ -11,4 +11,4 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (122-129): CHC: Empty array "pop" happens here.
+// Warning 2529: (122-129): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/array_pop_length_6.sol

@@ -11,4 +11,4 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (127-134): CHC: Empty array "pop" happens here.
+// Warning 2529: (127-134): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/array_pop_length_8.sol

@@ -13,4 +13,4 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (82-89): CHC: Empty array "pop" happens here.
+// Warning 2529: (82-89): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/length_basic.sol

@@ -10,4 +10,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (153-176): CHC: Assertion violation happens here.
+// Warning 6328: (153-176): CHC: Assertion violation happens here.\nCounterexample:\narr = []\n\n\n\nTransaction trace:\nconstructor()\nState: arr = []\nf()

test/libsolidity/smtCheckerTests/array_members/length_same_after_assignment_2_fail.sol

@@ -14,6 +14,6 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (198-224): CHC: Assertion violation happens here.
+// Warning 6328: (198-224): CHC: Assertion violation happens here.\nCounterexample:\narr = [], arr2 = []\n\n\n\nTransaction trace:\nconstructor()\nState: arr = [], arr2 = []\nf()
-// Warning 6328: (228-254): CHC: Assertion violation happens here.
+// Warning 6328: (228-254): CHC: Assertion violation happens here.\nCounterexample:\narr = [], arr2 = []\n\n\n\nTransaction trace:\nconstructor()\nState: arr = [], arr2 = []\nf()
-// Warning 6328: (258-281): CHC: Assertion violation happens here.
+// Warning 6328: (258-281): CHC: Assertion violation happens here.\nCounterexample:\narr = [], arr2 = []\n\n\n\nTransaction trace:\nconstructor()\nState: arr = [], arr2 = []\nf()

test/libsolidity/smtCheckerTests/array_members/length_same_after_assignment_3_fail.sol

@@ -16,7 +16,7 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (222-248): CHC: Assertion violation happens here.
+// Warning 6328: (222-248): CHC: Assertion violation happens here.\nCounterexample:\narr = [], arr2 = []\n\n\n\nTransaction trace:\nconstructor()\nState: arr = [], arr2 = []\nf()
-// Warning 6328: (252-278): CHC: Assertion violation happens here.
+// Warning 6328: (252-278): CHC: Assertion violation happens here.\nCounterexample:\narr = [], arr2 = []\n\n\n\nTransaction trace:\nconstructor()\nState: arr = [], arr2 = []\nf()
-// Warning 6328: (282-305): CHC: Assertion violation happens here.
+// Warning 6328: (282-305): CHC: Assertion violation happens here.\nCounterexample:\narr = [], arr2 = []\n\n\n\nTransaction trace:\nconstructor()\nState: arr = [], arr2 = []\nf()
-// Warning 6328: (309-335): CHC: Assertion violation happens here.
+// Warning 6328: (309-335): CHC: Assertion violation happens here.\nCounterexample:\narr = [], arr2 = []\n\n\n\nTransaction trace:\nconstructor()\nState: arr = [], arr2 = []\nf()

test/libsolidity/smtCheckerTests/array_members/pop_1_unsafe.sol

@@ -7,4 +7,4 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (82-89): CHC: Empty array "pop" happens here.
+// Warning 2529: (82-89): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/pop_2d_unsafe.sol

@@ -9,4 +9,4 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (111-121): CHC: Empty array "pop" happens here.
+// Warning 2529: (111-121): CHC: Empty array "pop" happens here.\nCounterexample:\na = [[0]]\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/pop_constructor_unsafe.sol

@@ -7,4 +7,4 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (76-83): CHC: Empty array "pop" happens here.
+// Warning 2529: (76-83): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\n\n\n\nTransaction trace:\nconstructor()

test/libsolidity/smtCheckerTests/array_members/pop_loop_unsafe.sol

@@ -11,4 +11,4 @@ contract C {
 	}
 }
 // ----
-// Warning 2529: (150-157): CHC: Empty array "pop" happens here.
+// Warning 2529: (150-157): CHC: Empty array "pop" happens here.\nCounterexample:\na = []\nl = 0\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf(0)

test/libsolidity/smtCheckerTests/array_members/push_2d_arg_1_unsafe.sol

@@ -9,6 +9,8 @@ contract C {
 		assert(a[0][a[0].length - 1] == y);
 	}
 }
+// ====
+// SMTIgnoreCex: yes
 // ----
 // Warning 3944: (162-177): CHC: Underflow (resulting value less than 0) happens here.
 // Warning 6328: (150-184): CHC: Assertion violation happens here.

test/libsolidity/smtCheckerTests/array_members/push_as_lhs_1d.sol

@@ -18,4 +18,4 @@ contract C {
 
 }
 // ----
-// Warning 6328: (232-262): CHC: Assertion violation happens here.
+// Warning 6328: (232-262): CHC: Assertion violation happens here.\nCounterexample:\nb = [1]\n\n\n\nTransaction trace:\nconstructor()\nState: b = []\ng()

test/libsolidity/smtCheckerTests/array_members/push_as_lhs_2d.sol

@@ -21,4 +21,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (395-453): CHC: Assertion violation happens here.
+// Warning 6328: (395-453): CHC: Assertion violation happens here.\nCounterexample:\nc = [[2]]\n\n\n\nTransaction trace:\nconstructor()\nState: c = []\ng()

test/libsolidity/smtCheckerTests/array_members/push_as_lhs_and_rhs_1d.sol

@@ -13,4 +13,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (237-263): CHC: Assertion violation happens here.
+// Warning 6328: (237-263): CHC: Assertion violation happens here.\nCounterexample:\nb = [0, 0]\n\n\n\nTransaction trace:\nconstructor()\nState: b = []\nf()

test/libsolidity/smtCheckerTests/array_members/push_as_lhs_and_rhs_2d_1.sol

@@ -16,4 +16,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (317-343): CHC: Assertion violation happens here.
+// Warning 6328: (317-343): CHC: Assertion violation happens here.\nCounterexample:\nb = [[0], [0]]\n\n\n\nTransaction trace:\nconstructor()\nState: b = []\nf()

test/libsolidity/smtCheckerTests/array_members/push_push_no_args_1_fail.sol

@@ -8,5 +8,5 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (113-139): CHC: Assertion violation happens here.
+// Warning 6328: (113-139): CHC: Assertion violation happens here.\nCounterexample:\narray2d = [[0]]\n\n\n\nTransaction trace:\nconstructor()\nState: array2d = []\nl()
-// Warning 6328: (143-189): CHC: Assertion violation happens here.
+// Warning 6328: (143-189): CHC: Assertion violation happens here.\nCounterexample:\narray2d = [[0]]\n\n\n\nTransaction trace:\nconstructor()\nState: array2d = []\nl()

test/libsolidity/smtCheckerTests/array_members/push_push_no_args_2_fail.sol

@@ -10,6 +10,6 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (122-148): CHC: Assertion violation happens here.
+// Warning 6328: (122-148): CHC: Assertion violation happens here.\nCounterexample:\narray2d = [[[0]]]\n\n\n\nTransaction trace:\nconstructor()\nState: array2d = []\nl()
-// Warning 6328: (202-218): CHC: Assertion violation happens here.
+// Warning 6328: (202-218): CHC: Assertion violation happens here.\nCounterexample:\narray2d = [[[0]]]\n\n\n\nTransaction trace:\nconstructor()\nState: array2d = []\nl()
-// Warning 6328: (222-278): CHC: Assertion violation happens here.
+// Warning 6328: (222-278): CHC: Assertion violation happens here.\nCounterexample:\narray2d = [[[0]]]\n\n\n\nTransaction trace:\nconstructor()\nState: array2d = []\nl()

test/libsolidity/smtCheckerTests/array_members/push_storage_ref_safe_aliasing.sol

@@ -11,6 +11,8 @@ contract C {
 		assert(a[0][a[0].length - 1] == 8);
 	}
 }
+// ====
+// SMTIgnoreCex: yes
 // ----
 // Warning 3944: (217-232): CHC: Underflow (resulting value less than 0) happens here.
 // Warning 6328: (205-239): CHC: Assertion violation happens here.

test/libsolidity/smtCheckerTests/array_members/push_storage_ref_unsafe_aliasing.sol

@@ -12,4 +12,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (167-188): CHC: Assertion violation happens here.
+// Warning 6328: (167-188): CHC: Assertion violation happens here.\nCounterexample:\na = [[17, 12, 12, 12, 12], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15], [15, 15]]\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/push_zero_2d_unsafe.sol

@@ -9,4 +9,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (111-144): CHC: Assertion violation happens here.
+// Warning 6328: (111-144): CHC: Assertion violation happens here.\nCounterexample:\na = [[0]]\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/push_zero_unsafe.sol

@@ -8,4 +8,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (94-124): CHC: Assertion violation happens here.
+// Warning 6328: (94-124): CHC: Assertion violation happens here.\nCounterexample:\na = [0]\n\n\n\nTransaction trace:\nconstructor()\nState: a = []\nf()

test/libsolidity/smtCheckerTests/array_members/storage_pointer_push_1.sol

@@ -15,4 +15,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (184-213): CHC: Assertion violation happens here.
+// Warning 6328: (184-213): CHC: Assertion violation happens here.\nCounterexample:\narray2d = [[], [], []]\n\n\n\nTransaction trace:\nconstructor()\nState: array2d = []\nl()

test/libsolidity/smtCheckerTests/blockchain_state/transfer.sol

@@ -10,4 +10,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (199-234): CHC: Assertion violation happens here.
+// Warning 6328: (199-234): CHC: Assertion violation happens here.\nCounterexample:\n\na = 2437\n\n\nTransaction trace:\nconstructor()\nf(2437)

test/libsolidity/smtCheckerTests/complex/slither/const_state_variables.sol

@@ -53,4 +53,4 @@ contract MyConc{
 // ----
 // Warning 2519: (773-792): This declaration shadows an existing declaration.
 // Warning 2018: (1009-1086): Function state mutability can be restricted to view
-// Warning 4984: (985-1002): CHC: Overflow (resulting value larger than 2**256 - 1) happens here.
+// Warning 4984: (985-1002): CHC: Overflow (resulting value larger than 2**256 - 1) happens here.\nCounterexample:\nA = 1, should_be_constant = 0, should_be_constant_2 = 2, not_constant = 0, not_constant_2 = 115792089237316195423570985008687907853269984665640564039457584007913129639926, not_constant_3 = 0\n\nTransaction trace:\nconstructor()

test/libsolidity/smtCheckerTests/control_flow/branches_inside_modifiers_1.sol

@@ -21,4 +21,4 @@ contract C {
     }
 }
 // ----
-// Warning 6328: (359-373): CHC: Assertion violation happens here.
+// Warning 6328: (359-373): CHC: Assertion violation happens here.\nCounterexample:\nx = 7\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()

test/libsolidity/smtCheckerTests/control_flow/branches_inside_modifiers_2.sol

@@ -21,4 +21,4 @@ contract C {
     }
 }
 // ----
-// Warning 6328: (365-379): CHC: Assertion violation happens here.
+// Warning 6328: (365-379): CHC: Assertion violation happens here.\nCounterexample:\nx = 3\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()

test/libsolidity/smtCheckerTests/control_flow/branches_inside_modifiers_3.sol

@@ -21,4 +21,4 @@ contract C {
     }
 }
 // ----
-// Warning 6328: (358-372): CHC: Assertion violation happens here.
+// Warning 6328: (358-372): CHC: Assertion violation happens here.\nCounterexample:\nx = 3\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()

test/libsolidity/smtCheckerTests/control_flow/branches_inside_modifiers_4.sol

@@ -21,4 +21,4 @@ contract C {
     }
 }
 // ----
-// Warning 6328: (365-379): CHC: Assertion violation happens here.
+// Warning 6328: (365-379): CHC: Assertion violation happens here.\nCounterexample:\nx = 7\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/branches_in_modifiers.sol

@@ -23,4 +23,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (103-117): CHC: Assertion violation happens here.
+// Warning 6328: (103-117): CHC: Assertion violation happens here.\nCounterexample:\nx = 0\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ntest()

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/branches_in_modifiers_2.sol

@@ -42,6 +42,6 @@ contract C {
     }
 }
 // ----
-// Warning 6328: (384-398): CHC: Assertion violation happens here.
+// Warning 6328: (384-398): CHC: Assertion violation happens here.\nCounterexample:\nx = 0\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ntest()
-// Warning 6328: (635-652): CHC: Assertion violation happens here.
+// Warning 6328: (635-652): CHC: Assertion violation happens here.\nCounterexample:\nx = 2\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\nset(1)\nState: x = 1\ntest()
-// Warning 6328: (781-795): CHC: Assertion violation happens here.
+// Warning 6328: (781-795): CHC: Assertion violation happens here.\nCounterexample:\nx = 1\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\nset(10)\nState: x = 10\ntest()

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/constructor_state_variable_init.sol

@@ -35,7 +35,7 @@ contract C is B {
 	}
 }
 // ----
-// Warning 6328: (330-344): CHC: Assertion violation happens here.
+// Warning 6328: (330-344): CHC: Assertion violation happens here.\nCounterexample:\ny = 2, x = (- 1)\na = 1\n\n\nTransaction trace:\nconstructor(1)
-// Warning 6328: (422-445): CHC: Assertion violation happens here.
+// Warning 6328: (422-445): CHC: Assertion violation happens here.\nCounterexample:\ny = 2, x = (- 1)\na = 1\n\n\nTransaction trace:\nconstructor(1)
-// Warning 6328: (522-546): CHC: Assertion violation happens here.
+// Warning 6328: (522-546): CHC: Assertion violation happens here.\nCounterexample:\ny = 4, x = 0\na = 0\n\n\nTransaction trace:\nconstructor(0)
-// Warning 6328: (566-579): CHC: Assertion violation happens here.
+// Warning 6328: (566-579): CHC: Assertion violation happens here.\nCounterexample:\ny = 4, x = 0\na = 0\n\n\nTransaction trace:\nconstructor(0)

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/constructor_state_variable_init_chain_alternate.sol

@@ -25,4 +25,4 @@ contract D is C {
 	}
 }
 // ----
-// Warning 6328: (319-333): CHC: Assertion violation happens here.
+// Warning 6328: (319-333): CHC: Assertion violation happens here.\nCounterexample:\nx = 3\na = 0\n\n\nTransaction trace:\nconstructor(0)

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/constructor_state_variable_init_diamond.sol

@@ -60,11 +60,11 @@ contract D4 is B, C {
 	}
 }
 // ----
-// Warning 6328: (370-384): CHC: Assertion violation happens here.
+// Warning 6328: (370-384): CHC: Assertion violation happens here.\nCounterexample:\nz = 1, y = 1, x = 0\n\n\n\nTransaction trace:\nconstructor()
-// Warning 6328: (403-418): CHC: Assertion violation happens here.
+// Warning 6328: (403-418): CHC: Assertion violation happens here.\nCounterexample:\nz = 1, y = 1, x = 0\n\n\n\nTransaction trace:\nconstructor()
-// Warning 6328: (493-507): CHC: Assertion violation happens here.
+// Warning 6328: (493-507): CHC: Assertion violation happens here.\nCounterexample:\nz = 2, y = 1, x = (- 1)\n\n\n\nTransaction trace:\nconstructor()
-// Warning 6328: (526-540): CHC: Assertion violation happens here.
+// Warning 6328: (526-540): CHC: Assertion violation happens here.\nCounterexample:\nz = 2, y = 1, x = (- 1)\n\n\n\nTransaction trace:\nconstructor()
-// Warning 6328: (703-717): CHC: Assertion violation happens here.
+// Warning 6328: (703-717): CHC: Assertion violation happens here.\nCounterexample:\nz = 1, y = 2, x = 1\n\n\n\nTransaction trace:\nconstructor()
-// Warning 6328: (769-784): CHC: Assertion violation happens here.
+// Warning 6328: (769-784): CHC: Assertion violation happens here.\nCounterexample:\nz = 1, y = 2, x = 1\n\n\n\nTransaction trace:\nconstructor()
-// Warning 6328: (860-874): CHC: Assertion violation happens here.
+// Warning 6328: (860-874): CHC: Assertion violation happens here.\nCounterexample:\nz = 2, y = 2, x = (- 1)\n\n\n\nTransaction trace:\nconstructor()
-// Warning 6328: (893-907): CHC: Assertion violation happens here.
+// Warning 6328: (893-907): CHC: Assertion violation happens here.\nCounterexample:\nz = 2, y = 2, x = (- 1)\n\n\n\nTransaction trace:\nconstructor()

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/constructors.sol

@@ -26,6 +26,6 @@ contract C is B {
 }
 // ----
 // Warning 5740: (152-157): Unreachable code.
-// Warning 6328: (310-324): CHC: Assertion violation happens here.
+// Warning 6328: (310-324): CHC: Assertion violation happens here.\nCounterexample:\nx = 1\na = 1\n\n\nTransaction trace:\nconstructor(1)
-// Warning 6328: (343-357): CHC: Assertion violation happens here.
+// Warning 6328: (343-357): CHC: Assertion violation happens here.\nCounterexample:\nx = 1\na = 1\n\n\nTransaction trace:\nconstructor(1)
-// Warning 6328: (376-390): CHC: Assertion violation happens here.
+// Warning 6328: (376-390): CHC: Assertion violation happens here.\nCounterexample:\nx = 2\na = 0\n\n\nTransaction trace:\nconstructor(0)

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/nested_if.sol

@@ -22,5 +22,5 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (147-174): CHC: Assertion violation happens here.
+// Warning 6328: (147-174): CHC: Assertion violation happens here.\nCounterexample:\n\na = 0\nb = 2\n\n\nTransaction trace:\nconstructor()\ntest(0, 2)
 // Warning 6838: (332-348): BMC: Condition is always false.

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/simple_if2.sol

@@ -14,4 +14,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (89-114): CHC: Assertion violation happens here.
+// Warning 6328: (89-114): CHC: Assertion violation happens here.\nCounterexample:\n\na = 0\n\n\nTransaction trace:\nconstructor()\ntest(0)

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/simple_if_array.sol

@@ -25,4 +25,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (205-222): CHC: Assertion violation happens here.
+// Warning 6328: (205-222): CHC: Assertion violation happens here.\nCounterexample:\na = [0, 0]\n\n\n\nTransaction trace:\nconstructor()\nState: a = [0, 0]\ncheck()

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/simple_if_state_var.sol

@@ -19,4 +19,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (132-146): CHC: Assertion violation happens here.
+// Warning 6328: (132-146): CHC: Assertion violation happens here.\nCounterexample:\nx = 0\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ncheck()

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/simple_if_struct.sol

@@ -22,4 +22,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (156-172): CHC: Assertion violation happens here.
+// Warning 6328: (156-172): CHC: Assertion violation happens here.\nCounterexample:\ns = {x: 0}\n\n\n\nTransaction trace:\nconstructor()\nState: s = {x: 0}\ncheck()

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/simple_if_struct_2.sol

@@ -22,4 +22,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (156-172): CHC: Assertion violation happens here.
+// Warning 6328: (156-172): CHC: Assertion violation happens here.\nCounterexample:\ns = {x: 0}\n\n\n\nTransaction trace:\nconstructor()\nState: s = {x: 0}\ncheck()

test/libsolidity/smtCheckerTests/control_flow/branches_with_return/simple_if_tuple.sol

@@ -23,5 +23,5 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (160-174): CHC: Assertion violation happens here.
+// Warning 6328: (160-174): CHC: Assertion violation happens here.\nCounterexample:\nx = 2, y = 2\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0, y = 0\ncheck()
-// Warning 6328: (194-208): CHC: Assertion violation happens here.
+// Warning 6328: (194-208): CHC: Assertion violation happens here.\nCounterexample:\nx = 2, y = 2\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0, y = 0\ncheck()

test/libsolidity/smtCheckerTests/control_flow/require.sol

@@ -31,4 +31,4 @@ contract C {
 }
 // ----
 // Warning 6321: (429-442): Unnamed return variable can remain unassigned. Add an explicit return with value to all non-reverting code paths or name the variable.
-// Warning 6328: (448-465): CHC: Assertion violation happens here.
+// Warning 6328: (448-465): CHC: Assertion violation happens here.\nCounterexample:\nx = true\n\n\n\nTransaction trace:\nconstructor()\nState: x = false\ni()

test/libsolidity/smtCheckerTests/control_flow/return_1_fail.sol

@@ -19,8 +19,8 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (244-270): CHC: Assertion violation happens here.
+// Warning 6328: (244-270): CHC: Assertion violation happens here.\nCounterexample:\n\n\n\n\nTransaction trace:\nconstructor()\nf()
-// Warning 6328: (274-300): CHC: Assertion violation happens here.
+// Warning 6328: (274-300): CHC: Assertion violation happens here.\nCounterexample:\n\n\n\n\nTransaction trace:\nconstructor()\nf()
-// Warning 6328: (304-330): CHC: Assertion violation happens here.
+// Warning 6328: (304-330): CHC: Assertion violation happens here.\nCounterexample:\n\n\n\n\nTransaction trace:\nconstructor()\nf()
-// Warning 6328: (334-362): CHC: Assertion violation happens here.
+// Warning 6328: (334-362): CHC: Assertion violation happens here.\nCounterexample:\n\n\n\n\nTransaction trace:\nconstructor()\nf()
 // Warning 2661: (158-161): BMC: Overflow (resulting value larger than 2**256 - 1) happens here.

test/libsolidity/smtCheckerTests/control_flow/return_2_fail.sol

@@ -27,6 +27,8 @@ contract C {
 		assert(c != 0xffffffff);
 	}
 }
+// ====
+// SMTIgnoreCex: yes
 // ----
 // Warning 6328: (303-329): CHC: Assertion violation happens here.
 // Warning 6328: (333-350): CHC: Assertion violation happens here.

test/libsolidity/smtCheckerTests/control_flow/revert.sol

@@ -33,4 +33,4 @@ contract C {
 // Warning 5740: (116-129): Unreachable code.
 // Warning 5740: (221-234): Unreachable code.
 // Warning 6321: (408-421): Unnamed return variable can remain unassigned. Add an explicit return with value to all non-reverting code paths or name the variable.
-// Warning 6328: (427-444): CHC: Assertion violation happens here.
+// Warning 6328: (427-444): CHC: Assertion violation happens here.\nCounterexample:\nx = true\n\n\n\nTransaction trace:\nconstructor()\nState: x = false\ni()

test/libsolidity/smtCheckerTests/control_flow/revert_complex_flow.sol

@@ -14,5 +14,5 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (183-197): CHC: Assertion violation happens here.
+// Warning 6328: (183-197): CHC: Assertion violation happens here.\nCounterexample:\n\nb = false\na = 0\n\n\nTransaction trace:\nconstructor()\nf(false, 0)
 // Warning 6838: (155-156): BMC: Condition is always false.

test/libsolidity/smtCheckerTests/control_flow/short_circuit_and_fail.sol

@@ -15,4 +15,4 @@ contract c {
 	}
 }
 // ----
-// Warning 6328: (227-236): CHC: Assertion violation happens here.
+// Warning 6328: (227-236): CHC: Assertion violation happens here.\nCounterexample:\nx = 1\n\n = false\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()

test/libsolidity/smtCheckerTests/control_flow/short_circuit_and_inside_branch.sol

@@ -17,5 +17,5 @@ contract c {
 	}
 }
 // ----
-// Warning 6328: (202-218): CHC: Assertion violation happens here.
+// Warning 6328: (202-218): CHC: Assertion violation happens here.\nCounterexample:\nx = 101\n\n = false\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()
-// Warning 6328: (242-252): CHC: Assertion violation happens here.
+// Warning 6328: (242-252): CHC: Assertion violation happens here.\nCounterexample:\nx = 101\n\n = false\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()

test/libsolidity/smtCheckerTests/control_flow/short_circuit_and_need_both_fail.sol

@@ -15,4 +15,4 @@ contract c {
 	}
 }
 // ----
-// Warning 6328: (225-235): CHC: Assertion violation happens here.
+// Warning 6328: (225-235): CHC: Assertion violation happens here.\nCounterexample:\nx = 2\n\n = false\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()

test/libsolidity/smtCheckerTests/control_flow/short_circuit_or_fail.sol

@@ -15,4 +15,4 @@ contract c {
 	}
 }
 // ----
-// Warning 6328: (225-235): CHC: Assertion violation happens here.
+// Warning 6328: (225-235): CHC: Assertion violation happens here.\nCounterexample:\nx = 1\n\n = false\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()

test/libsolidity/smtCheckerTests/control_flow/short_circuit_or_inside_branch.sol

@@ -24,4 +24,4 @@ contract c {
 	}
 }
 // ----
-// Warning 6328: (360-370): CHC: Assertion violation happens here.
+// Warning 6328: (360-370): CHC: Assertion violation happens here.\nCounterexample:\nx = 102\na = false\n = false\n\nTransaction trace:\nconstructor()\nState: x = 0\ng(false)

test/libsolidity/smtCheckerTests/control_flow/short_circuit_or_need_both_fail.sol

@@ -15,4 +15,4 @@ contract c {
 	}
 }
 // ----
-// Warning 6328: (225-235): CHC: Assertion violation happens here.
+// Warning 6328: (225-235): CHC: Assertion violation happens here.\nCounterexample:\nx = 2\n\n = false\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()

test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_1.sol

@@ -9,4 +9,4 @@ contract C {
     }
 }
 // ----
-// Warning 6328: (159-173): CHC: Assertion violation happens here.
+// Warning 6328: (159-173): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 11\n\n\nTransaction trace:\nconstructor()\nf(11)

test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_2.sol

@@ -9,4 +9,4 @@ contract C {
     }
 }
 // ----
-// Warning 6328: (159-173): CHC: Assertion violation happens here.
+// Warning 6328: (159-173): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 11\n\n\nTransaction trace:\nconstructor()\nf(11)

test/libsolidity/smtCheckerTests/control_flow/ways_to_merge_variables_3.sol

@@ -9,4 +9,4 @@ contract C {
     }
 }
 // ----
-// Warning 6328: (161-175): CHC: Assertion violation happens here.
+// Warning 6328: (161-175): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 11\n\n\nTransaction trace:\nconstructor()\nf(11)

test/libsolidity/smtCheckerTests/crypto/crypto_functions_compare_hashes.sol

@@ -11,6 +11,6 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (183-197): CHC: Assertion violation happens here.
+// Warning 6328: (183-197): CHC: Assertion violation happens here.\nCounterexample:\n\ndata = [7, 7]\n\n\nTransaction trace:\nconstructor()\nf([7, 7])
-// Warning 6328: (201-215): CHC: Assertion violation happens here.
+// Warning 6328: (201-215): CHC: Assertion violation happens here.\nCounterexample:\n\ndata = [9, 9]\n\n\nTransaction trace:\nconstructor()\nf([9, 9])
-// Warning 6328: (219-233): CHC: Assertion violation happens here.
+// Warning 6328: (219-233): CHC: Assertion violation happens here.\nCounterexample:\n\ndata = [7, 7]\n\n\nTransaction trace:\nconstructor()\nf([7, 7])

test/libsolidity/smtCheckerTests/crypto/crypto_functions_fail.sol

@@ -29,7 +29,7 @@ contract C {
 // Warning 6328: (305-321): CHC: Assertion violation might happen here.
 // Warning 1218: (448-464): CHC: Error trying to invoke SMT solver.
 // Warning 6328: (448-464): CHC: Assertion violation might happen here.
-// Warning 6328: (673-689): CHC: Assertion violation happens here.
+// Warning 6328: (673-689): CHC: Assertion violation happens here.\nCounterexample:\n\nh0 = 21238\nv0 = 173\nr0 = 30612\ns0 = 32285\nh1 = 7719\nv1 = 21\nr1 = 10450\ns1 = 8855\n\n\nTransaction trace:\nconstructor()\ne(21238, 173, 30612, 32285, 7719, 21, 10450, 8855)
 // Warning 4661: (168-184): BMC: Assertion violation happens here.
 // Warning 4661: (305-321): BMC: Assertion violation happens here.
 // Warning 4661: (448-464): BMC: Assertion violation happens here.

test/libsolidity/smtCheckerTests/crypto/crypto_functions_not_same.sol

@@ -11,4 +11,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (229-243): CHC: Assertion violation happens here.
+// Warning 6328: (229-243): CHC: Assertion violation happens here.\nCounterexample:\n\ndata = [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]\n\n\nTransaction trace:\nconstructor()\nf([7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7])

test/libsolidity/smtCheckerTests/external_calls/external.sol

@@ -17,4 +17,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (200-214): CHC: Assertion violation happens here.
+// Warning 6328: (200-214): CHC: Assertion violation happens here.\nCounterexample:\nx = 10, d = 0\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0, d = 0\nf()\nState: x = 1, d = 0\nf()\nState: x = 2, d = 0\ng()

test/libsolidity/smtCheckerTests/external_calls/external_hash.sol

@@ -25,5 +25,7 @@ contract C {
 		assert(sig_1 == sig_2);
 	}
 }
+// ====
+// SMTIgnoreCex: yes
 // ----
 // Warning 6328: (423-445): CHC: Assertion violation happens here.

test/libsolidity/smtCheckerTests/external_calls/external_hash_known_code_pure.sol

@@ -27,5 +27,7 @@ contract C {
 		assert(sig_1 == sig_2);
 	}
 }
+// ====
+// SMTIgnoreCex: yes
 // ----
 // Warning 6328: (431-453): CHC: Assertion violation happens here.

test/libsolidity/smtCheckerTests/external_calls/external_hash_known_code_state.sol

@@ -34,4 +34,4 @@ contract C {
 	}
 }
 // ----
-// Warning 6328: (528-565): CHC: Assertion violation happens here.
+// Warning 6328: (528-565): CHC: Assertion violation happens here.\nCounterexample:\nowner = 1, y = 0, z = 0, s = 0\n\n\n\nTransaction trace:\nconstructor()\nState: owner = 1, y = 0, z = 0, s = 0\ninv()