/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:17:30,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:17:30,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:17:30,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:17:30,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:17:30,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:17:30,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:17:30,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:17:30,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:17:30,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:17:30,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:17:30,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:17:30,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:17:30,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:17:30,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:17:30,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:17:30,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:17:30,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:17:30,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:17:30,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:17:30,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:17:30,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:17:30,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:17:30,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:17:30,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:17:30,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:17:30,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:17:30,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:17:30,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:17:30,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:17:30,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:17:30,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:17:30,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:17:30,328 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:17:30,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:17:30,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:17:30,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:17:30,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:17:30,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:17:30,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:17:30,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:17:30,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:17:30,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:17:30,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:17:30,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:17:30,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:17:30,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:17:30,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:17:30,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:17:30,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:17:30,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:17:30,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:17:30,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:17:30,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:17:30,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:17:30,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:17:30,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:17:30,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:17:30,745 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:17:30,746 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:17:30,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/mutex_lock_struct.i [2020-12-23 06:17:30,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/62495b484/c4acd78971e84db48ef9ab2f503663b9/FLAG8bf110c66 [2020-12-23 06:17:31,537 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:17:31,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i [2020-12-23 06:17:31,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/62495b484/c4acd78971e84db48ef9ab2f503663b9/FLAG8bf110c66 [2020-12-23 06:17:31,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/62495b484/c4acd78971e84db48ef9ab2f503663b9 [2020-12-23 06:17:31,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:17:31,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:17:31,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:17:31,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:17:31,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:17:31,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:17:31" (1/1) ... [2020-12-23 06:17:31,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b9ac80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:31, skipping insertion in model container [2020-12-23 06:17:31,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:17:31" (1/1) ... [2020-12-23 06:17:31,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:17:31,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:17:32,115 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i[295,308] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],StructAccessExpression[IdentifierExpression[~a,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b,],base],StructAccessExpression[IdentifierExpression[~b,],offset]]] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~m~0,],is_locked] [2020-12-23 06:17:32,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:17:32,148 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:17:32,163 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/mutex_lock_struct.i[295,308] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],StructAccessExpression[IdentifierExpression[~a,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b,],base],StructAccessExpression[IdentifierExpression[~b,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#m~0,],base],StructAccessExpression[IdentifierExpression[~#m~0,],offset]]] [2020-12-23 06:17:32,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:17:32,185 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:17:32,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32 WrapperNode [2020-12-23 06:17:32,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:17:32,187 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:17:32,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:17:32,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:17:32,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (1/1) ... [2020-12-23 06:17:32,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (1/1) ... [2020-12-23 06:17:32,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:17:32,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:17:32,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:17:32,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:17:32,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (1/1) ... [2020-12-23 06:17:32,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (1/1) ... [2020-12-23 06:17:32,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (1/1) ... [2020-12-23 06:17:32,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (1/1) ... [2020-12-23 06:17:32,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (1/1) ... [2020-12-23 06:17:32,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (1/1) ... [2020-12-23 06:17:32,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (1/1) ... [2020-12-23 06:17:32,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:17:32,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:17:32,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:17:32,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:17:32,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:17:32,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:17:32,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:17:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:17:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:17:32,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:17:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:17:32,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:17:32,809 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:17:32,809 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 06:17:32,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:17:32 BoogieIcfgContainer [2020-12-23 06:17:32,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:17:32,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:17:32,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:17:32,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:17:32,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:17:31" (1/3) ... [2020-12-23 06:17:32,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7250df9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:17:32, skipping insertion in model container [2020-12-23 06:17:32,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:17:32" (2/3) ... [2020-12-23 06:17:32,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7250df9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:17:32, skipping insertion in model container [2020-12-23 06:17:32,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:17:32" (3/3) ... [2020-12-23 06:17:32,824 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2020-12-23 06:17:32,864 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:17:32,870 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 06:17:32,894 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 06:17:32,938 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:17:32,938 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:17:32,938 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:17:32,938 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:17:32,939 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:17:32,939 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:17:32,939 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:17:32,939 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:17:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-23 06:17:32,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 06:17:32,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:32,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 06:17:32,968 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:32,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:32,976 INFO L82 PathProgramCache]: Analyzing trace with hash 925605, now seen corresponding path program 1 times [2020-12-23 06:17:32,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:32,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957484169] [2020-12-23 06:17:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:17:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:17:33,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957484169] [2020-12-23 06:17:33,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:17:33,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:17:33,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897618528] [2020-12-23 06:17:33,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:17:33,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:17:33,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:17:33,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:17:33,222 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-12-23 06:17:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:17:33,258 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-23 06:17:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:17:33,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 06:17:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:17:33,272 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:17:33,273 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 06:17:33,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:17:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 06:17:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 06:17:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 06:17:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-12-23 06:17:33,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 4 [2020-12-23 06:17:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:17:33,324 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-12-23 06:17:33,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:17:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-12-23 06:17:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:17:33,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:17:33,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:17:33,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:17:33,326 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:17:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:17:33,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1810629644, now seen corresponding path program 1 times [2020-12-23 06:17:33,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:17:33,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091570217] [2020-12-23 06:17:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:17:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:17:33,370 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:17:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:17:33,424 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:17:33,458 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:17:33,459 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:17:33,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:17:33,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:17:33 BoogieIcfgContainer [2020-12-23 06:17:33,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:17:33,491 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:17:33,492 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:17:33,492 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:17:33,492 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:17:32" (3/4) ... [2020-12-23 06:17:33,495 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 06:17:33,542 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/mutex_lock_struct.i-witness.graphml [2020-12-23 06:17:33,542 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:17:33,545 INFO L168 Benchmark]: Toolchain (without parser) took 1603.59 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 111.0 MB in the end (delta: 16.4 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:33,545 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:17:33,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.21 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:33,548 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.19 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:33,549 INFO L168 Benchmark]: Boogie Preprocessor took 27.78 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 114.7 MB in the end (delta: 958.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:33,550 INFO L168 Benchmark]: RCFGBuilder took 555.75 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 102.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:33,551 INFO L168 Benchmark]: TraceAbstraction took 676.20 ms. Allocated memory is still 151.0 MB. Free memory was 102.1 MB in the beginning and 112.6 MB in the end (delta: -10.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:17:33,552 INFO L168 Benchmark]: Witness Printer took 50.56 ms. Allocated memory is still 151.0 MB. Free memory was 112.6 MB in the beginning and 111.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:17:33,559 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.21 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 117.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.19 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.78 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 114.7 MB in the end (delta: 958.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 555.75 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 102.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 676.20 ms. Allocated memory is still 151.0 MB. Free memory was 102.1 MB in the beginning and 112.6 MB in the end (delta: -10.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 50.56 ms. Allocated memory is still 151.0 MB. Free memory was 112.6 MB in the beginning and 111.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L35] struct mutex m; [L36] m.is_locked = 0 [L23] EXPR a->is_locked [L23] COND FALSE !(a->is_locked == 1) [L24] a->is_locked = 1 [L23] EXPR a->is_locked [L23] COND TRUE a->is_locked == 1 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 7 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...