./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6cbe8dd40fecf4391efe5e4ba3939c64a9fdbbfb53083def47a68bbefda43a3c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 23:21:20,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 23:21:20,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 23:21:20,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 23:21:20,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 23:21:20,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 23:21:20,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 23:21:20,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 23:21:20,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 23:21:20,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 23:21:20,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 23:21:20,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 23:21:20,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 23:21:20,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 23:21:20,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 23:21:20,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 23:21:20,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 23:21:20,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 23:21:20,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 23:21:20,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 23:21:20,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 23:21:20,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 23:21:20,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 23:21:20,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 23:21:20,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 23:21:20,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 23:21:20,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 23:21:20,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 23:21:20,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 23:21:20,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 23:21:20,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 23:21:20,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 23:21:20,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 23:21:20,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 23:21:20,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 23:21:20,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 23:21:20,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 23:21:20,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 23:21:20,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 23:21:20,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 23:21:20,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 23:21:20,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 23:21:20,160 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 23:21:20,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 23:21:20,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 23:21:20,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 23:21:20,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 23:21:20,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 23:21:20,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 23:21:20,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 23:21:20,164 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 23:21:20,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 23:21:20,165 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 23:21:20,165 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 23:21:20,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 23:21:20,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 23:21:20,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 23:21:20,166 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 23:21:20,166 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 23:21:20,166 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 23:21:20,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 23:21:20,167 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 23:21:20,167 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 23:21:20,167 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 23:21:20,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 23:21:20,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 23:21:20,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 23:21:20,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:21:20,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 23:21:20,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 23:21:20,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 23:21:20,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 23:21:20,169 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 23:21:20,169 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 23:21:20,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 23:21:20,170 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 23:21:20,170 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbe8dd40fecf4391efe5e4ba3939c64a9fdbbfb53083def47a68bbefda43a3c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 23:21:20,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 23:21:20,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 23:21:20,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 23:21:20,520 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 23:21:20,521 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 23:21:20,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c [2023-08-29 23:21:21,713 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 23:21:21,956 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 23:21:21,957 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c [2023-08-29 23:21:21,963 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ba89665/28695c9bee524313bb33c77d943b10df/FLAGb0659d4dc [2023-08-29 23:21:21,975 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9ba89665/28695c9bee524313bb33c77d943b10df [2023-08-29 23:21:21,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 23:21:21,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 23:21:21,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 23:21:21,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 23:21:21,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 23:21:21,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:21:21" (1/1) ... [2023-08-29 23:21:21,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9991216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:21, skipping insertion in model container [2023-08-29 23:21:21,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:21:21" (1/1) ... [2023-08-29 23:21:21,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 23:21:22,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 23:21:22,163 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c[5938,5951] [2023-08-29 23:21:22,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:21:22,183 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 23:21:22,222 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-barrier-loop.wvr.c[5938,5951] [2023-08-29 23:21:22,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 23:21:22,234 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:21:22,234 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-29 23:21:22,240 INFO L208 MainTranslator]: Completed translation [2023-08-29 23:21:22,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22 WrapperNode [2023-08-29 23:21:22,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 23:21:22,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 23:21:22,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 23:21:22,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 23:21:22,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,306 INFO L138 Inliner]: procedures = 25, calls = 120, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 268 [2023-08-29 23:21:22,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 23:21:22,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 23:21:22,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 23:21:22,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 23:21:22,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,369 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 23:21:22,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 23:21:22,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 23:21:22,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 23:21:22,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (1/1) ... [2023-08-29 23:21:22,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 23:21:22,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 23:21:22,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 23:21:22,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 23:21:22,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 23:21:22,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 23:21:22,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 23:21:22,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 23:21:22,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-29 23:21:22,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-29 23:21:22,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-29 23:21:22,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-29 23:21:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-29 23:21:22,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-29 23:21:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-29 23:21:22,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-29 23:21:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 23:21:22,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-29 23:21:22,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-29 23:21:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-29 23:21:22,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-29 23:21:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-29 23:21:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-29 23:21:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 23:21:22,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 23:21:22,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 23:21:22,461 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 23:21:22,589 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 23:21:22,591 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 23:21:23,013 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 23:21:23,112 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 23:21:23,113 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-29 23:21:23,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:21:23 BoogieIcfgContainer [2023-08-29 23:21:23,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 23:21:23,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 23:21:23,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 23:21:23,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 23:21:23,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:21:21" (1/3) ... [2023-08-29 23:21:23,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53968b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:21:23, skipping insertion in model container [2023-08-29 23:21:23,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:21:22" (2/3) ... [2023-08-29 23:21:23,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53968b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:21:23, skipping insertion in model container [2023-08-29 23:21:23,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:21:23" (3/3) ... [2023-08-29 23:21:23,122 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier-loop.wvr.c [2023-08-29 23:21:23,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 23:21:23,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-29 23:21:23,137 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 23:21:23,260 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-29 23:21:23,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 297 transitions, 666 flow [2023-08-29 23:21:23,440 INFO L130 PetriNetUnfolder]: 14/265 cut-off events. [2023-08-29 23:21:23,440 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:21:23,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 265 events. 14/265 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 532 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 222. Up to 3 conditions per place. [2023-08-29 23:21:23,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 297 transitions, 666 flow [2023-08-29 23:21:23,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 261 transitions, 570 flow [2023-08-29 23:21:23,465 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 23:21:23,472 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 261 transitions, 570 flow [2023-08-29 23:21:23,475 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 261 transitions, 570 flow [2023-08-29 23:21:23,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 261 transitions, 570 flow [2023-08-29 23:21:23,525 INFO L130 PetriNetUnfolder]: 14/261 cut-off events. [2023-08-29 23:21:23,525 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-29 23:21:23,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 261 events. 14/261 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 532 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 222. Up to 3 conditions per place. [2023-08-29 23:21:23,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 15256 [2023-08-29 23:21:27,513 INFO L134 LiptonReduction]: Checked pairs total: 110291 [2023-08-29 23:21:27,514 INFO L136 LiptonReduction]: Total number of compositions: 187 [2023-08-29 23:21:27,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 23:21:27,532 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4541e881, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 23:21:27,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-08-29 23:21:27,535 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-29 23:21:27,535 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 23:21:27,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:21:27,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 23:21:27,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:21:27,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:21:27,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1085, now seen corresponding path program 1 times [2023-08-29 23:21:27,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:21:27,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381604092] [2023-08-29 23:21:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:21:27,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:21:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:21:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:21:27,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:21:27,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381604092] [2023-08-29 23:21:27,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381604092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:21:27,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:21:27,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 23:21:27,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676836562] [2023-08-29 23:21:27,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:21:27,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 23:21:27,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:21:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 23:21:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 23:21:27,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 488 [2023-08-29 23:21:27,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 112 transitions, 272 flow. Second operand has 2 states, 2 states have (on average 260.5) internal successors, (521), 2 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:27,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:21:27,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 488 [2023-08-29 23:21:27,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:21:41,184 INFO L130 PetriNetUnfolder]: 130780/195773 cut-off events. [2023-08-29 23:21:41,184 INFO L131 PetriNetUnfolder]: For 12493/12493 co-relation queries the response was YES. [2023-08-29 23:21:41,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366620 conditions, 195773 events. 130780/195773 cut-off events. For 12493/12493 co-relation queries the response was YES. Maximal size of possible extension queue 8867. Compared 1693702 event pairs, 104620 based on Foata normal form. 0/123960 useless extension candidates. Maximal degree in co-relation 364112. Up to 157514 conditions per place. [2023-08-29 23:21:43,002 INFO L137 encePairwiseOnDemand]: 485/488 looper letters, 55 selfloop transitions, 0 changer transitions 0/109 dead transitions. [2023-08-29 23:21:43,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 109 transitions, 376 flow [2023-08-29 23:21:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 23:21:43,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 23:21:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 578 transitions. [2023-08-29 23:21:43,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922131147540983 [2023-08-29 23:21:43,017 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 578 transitions. [2023-08-29 23:21:43,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 578 transitions. [2023-08-29 23:21:43,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:21:43,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 578 transitions. [2023-08-29 23:21:43,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 289.0) internal successors, (578), 2 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:43,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 488.0) internal successors, (1464), 3 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:43,031 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 488.0) internal successors, (1464), 3 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:43,033 INFO L175 Difference]: Start difference. First operand has 123 places, 112 transitions, 272 flow. Second operand 2 states and 578 transitions. [2023-08-29 23:21:43,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 109 transitions, 376 flow [2023-08-29 23:21:43,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 109 transitions, 344 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-29 23:21:43,685 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 234 flow [2023-08-29 23:21:43,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=234, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2023-08-29 23:21:43,690 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -14 predicate places. [2023-08-29 23:21:43,691 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 234 flow [2023-08-29 23:21:43,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 260.5) internal successors, (521), 2 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:43,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:21:43,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:21:43,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 23:21:43,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:21:43,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:21:43,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1026884479, now seen corresponding path program 1 times [2023-08-29 23:21:43,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:21:43,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105560133] [2023-08-29 23:21:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:21:43,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:21:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:21:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:21:43,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:21:43,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105560133] [2023-08-29 23:21:43,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105560133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:21:43,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:21:43,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:21:43,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448718316] [2023-08-29 23:21:43,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:21:43,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:21:43,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:21:43,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:21:43,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:21:43,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 488 [2023-08-29 23:21:43,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:43,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:21:43,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 488 [2023-08-29 23:21:43,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:21:54,847 INFO L130 PetriNetUnfolder]: 133318/199891 cut-off events. [2023-08-29 23:21:54,848 INFO L131 PetriNetUnfolder]: For 3018/3018 co-relation queries the response was YES. [2023-08-29 23:21:56,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364233 conditions, 199891 events. 133318/199891 cut-off events. For 3018/3018 co-relation queries the response was YES. Maximal size of possible extension queue 8888. Compared 1733286 event pairs, 102147 based on Foata normal form. 0/126642 useless extension candidates. Maximal degree in co-relation 364230. Up to 154128 conditions per place. [2023-08-29 23:21:57,366 INFO L137 encePairwiseOnDemand]: 479/488 looper letters, 103 selfloop transitions, 7 changer transitions 0/162 dead transitions. [2023-08-29 23:21:57,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 575 flow [2023-08-29 23:21:57,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:21:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:21:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2023-08-29 23:21:57,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744535519125683 [2023-08-29 23:21:57,372 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2023-08-29 23:21:57,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2023-08-29 23:21:57,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:21:57,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2023-08-29 23:21:57,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:57,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:57,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:57,382 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 234 flow. Second operand 3 states and 841 transitions. [2023-08-29 23:21:57,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 575 flow [2023-08-29 23:21:57,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 575 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:21:57,390 INFO L231 Difference]: Finished difference. Result has 113 places, 115 transitions, 290 flow [2023-08-29 23:21:57,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=113, PETRI_TRANSITIONS=115} [2023-08-29 23:21:57,391 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -10 predicate places. [2023-08-29 23:21:57,392 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 115 transitions, 290 flow [2023-08-29 23:21:57,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:57,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:21:57,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 23:21:57,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 23:21:57,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:21:57,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:21:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1026884480, now seen corresponding path program 1 times [2023-08-29 23:21:57,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:21:57,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447489398] [2023-08-29 23:21:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:21:57,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:21:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:21:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:21:57,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:21:57,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447489398] [2023-08-29 23:21:57,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447489398] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:21:57,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:21:57,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:21:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131943719] [2023-08-29 23:21:57,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:21:57,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:21:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:21:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:21:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:21:57,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 488 [2023-08-29 23:21:57,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 115 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:21:57,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:21:57,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 488 [2023-08-29 23:21:57,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:22:08,222 INFO L130 PetriNetUnfolder]: 132691/199258 cut-off events. [2023-08-29 23:22:08,222 INFO L131 PetriNetUnfolder]: For 6237/6245 co-relation queries the response was YES. [2023-08-29 23:22:08,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365649 conditions, 199258 events. 132691/199258 cut-off events. For 6237/6245 co-relation queries the response was YES. Maximal size of possible extension queue 8886. Compared 1733070 event pairs, 105797 based on Foata normal form. 241/126656 useless extension candidates. Maximal degree in co-relation 365644. Up to 160060 conditions per place. [2023-08-29 23:22:09,519 INFO L137 encePairwiseOnDemand]: 485/488 looper letters, 58 selfloop transitions, 1 changer transitions 0/113 dead transitions. [2023-08-29 23:22:09,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 113 transitions, 404 flow [2023-08-29 23:22:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:22:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:22:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 821 transitions. [2023-08-29 23:22:09,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607923497267759 [2023-08-29 23:22:09,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 821 transitions. [2023-08-29 23:22:09,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 821 transitions. [2023-08-29 23:22:09,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:22:09,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 821 transitions. [2023-08-29 23:22:09,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:09,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:09,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:09,530 INFO L175 Difference]: Start difference. First operand has 113 places, 115 transitions, 290 flow. Second operand 3 states and 821 transitions. [2023-08-29 23:22:09,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 113 transitions, 404 flow [2023-08-29 23:22:09,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 113 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:22:09,549 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 274 flow [2023-08-29 23:22:09,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2023-08-29 23:22:09,550 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -12 predicate places. [2023-08-29 23:22:09,550 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 274 flow [2023-08-29 23:22:09,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:09,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:22:09,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:22:09,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 23:22:09,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:22:09,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:22:09,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1275969394, now seen corresponding path program 1 times [2023-08-29 23:22:09,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:22:09,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397908581] [2023-08-29 23:22:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:22:09,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:22:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:22:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:22:09,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:22:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397908581] [2023-08-29 23:22:09,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397908581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:22:09,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:22:09,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:22:09,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733448303] [2023-08-29 23:22:09,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:22:09,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:22:09,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:22:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:22:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:22:09,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 488 [2023-08-29 23:22:09,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:09,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:22:09,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 488 [2023-08-29 23:22:09,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:22:18,220 INFO L130 PetriNetUnfolder]: 108919/165661 cut-off events. [2023-08-29 23:22:18,221 INFO L131 PetriNetUnfolder]: For 4546/4554 co-relation queries the response was YES. [2023-08-29 23:22:18,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303282 conditions, 165661 events. 108919/165661 cut-off events. For 4546/4554 co-relation queries the response was YES. Maximal size of possible extension queue 6968. Compared 1435150 event pairs, 83792 based on Foata normal form. 0/107486 useless extension candidates. Maximal degree in co-relation 303277. Up to 121876 conditions per place. [2023-08-29 23:22:19,416 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 101 selfloop transitions, 7 changer transitions 0/159 dead transitions. [2023-08-29 23:22:19,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 159 transitions, 601 flow [2023-08-29 23:22:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:22:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:22:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 837 transitions. [2023-08-29 23:22:19,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5717213114754098 [2023-08-29 23:22:19,419 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 837 transitions. [2023-08-29 23:22:19,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 837 transitions. [2023-08-29 23:22:19,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:22:19,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 837 transitions. [2023-08-29 23:22:19,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 279.0) internal successors, (837), 3 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:19,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:19,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:19,425 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 274 flow. Second operand 3 states and 837 transitions. [2023-08-29 23:22:19,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 159 transitions, 601 flow [2023-08-29 23:22:19,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 23:22:19,432 INFO L231 Difference]: Finished difference. Result has 114 places, 118 transitions, 331 flow [2023-08-29 23:22:19,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=114, PETRI_TRANSITIONS=118} [2023-08-29 23:22:19,433 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -9 predicate places. [2023-08-29 23:22:19,433 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 118 transitions, 331 flow [2023-08-29 23:22:19,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:19,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:22:19,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:22:19,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 23:22:19,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:22:19,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:22:19,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1275969393, now seen corresponding path program 1 times [2023-08-29 23:22:19,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:22:19,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914024335] [2023-08-29 23:22:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:22:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:22:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:22:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:22:19,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:22:19,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914024335] [2023-08-29 23:22:19,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914024335] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:22:19,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:22:19,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:22:19,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691884521] [2023-08-29 23:22:19,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:22:19,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:22:19,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:22:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:22:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:22:19,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 488 [2023-08-29 23:22:19,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 118 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:19,579 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:22:19,579 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 488 [2023-08-29 23:22:19,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:22:26,012 INFO L130 PetriNetUnfolder]: 79628/123199 cut-off events. [2023-08-29 23:22:26,013 INFO L131 PetriNetUnfolder]: For 13354/13354 co-relation queries the response was YES. [2023-08-29 23:22:26,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233300 conditions, 123199 events. 79628/123199 cut-off events. For 13354/13354 co-relation queries the response was YES. Maximal size of possible extension queue 5005. Compared 1057739 event pairs, 61618 based on Foata normal form. 5678/89013 useless extension candidates. Maximal degree in co-relation 233294. Up to 92259 conditions per place. [2023-08-29 23:22:26,781 INFO L137 encePairwiseOnDemand]: 484/488 looper letters, 87 selfloop transitions, 3 changer transitions 0/143 dead transitions. [2023-08-29 23:22:26,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 143 transitions, 578 flow [2023-08-29 23:22:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:22:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:22:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 850 transitions. [2023-08-29 23:22:26,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806010928961749 [2023-08-29 23:22:26,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 850 transitions. [2023-08-29 23:22:26,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 850 transitions. [2023-08-29 23:22:26,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:22:26,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 850 transitions. [2023-08-29 23:22:26,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:26,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:26,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:26,795 INFO L175 Difference]: Start difference. First operand has 114 places, 118 transitions, 331 flow. Second operand 3 states and 850 transitions. [2023-08-29 23:22:26,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 143 transitions, 578 flow [2023-08-29 23:22:26,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 143 transitions, 564 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:22:26,832 INFO L231 Difference]: Finished difference. Result has 112 places, 116 transitions, 319 flow [2023-08-29 23:22:26,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=112, PETRI_TRANSITIONS=116} [2023-08-29 23:22:26,835 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -11 predicate places. [2023-08-29 23:22:26,835 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 116 transitions, 319 flow [2023-08-29 23:22:26,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:26,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:22:26,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:22:26,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 23:22:26,837 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:22:26,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:22:26,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1006467714, now seen corresponding path program 1 times [2023-08-29 23:22:26,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:22:26,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609864845] [2023-08-29 23:22:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:22:26,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:22:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:22:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:22:26,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:22:26,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609864845] [2023-08-29 23:22:26,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609864845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:22:26,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:22:26,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 23:22:26,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024811253] [2023-08-29 23:22:26,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:22:26,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:22:26,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:22:26,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:22:26,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:22:26,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 488 [2023-08-29 23:22:26,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 116 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:26,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:22:26,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 488 [2023-08-29 23:22:26,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:22:34,677 INFO L130 PetriNetUnfolder]: 98963/147430 cut-off events. [2023-08-29 23:22:34,677 INFO L131 PetriNetUnfolder]: For 16123/16132 co-relation queries the response was YES. [2023-08-29 23:22:35,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285509 conditions, 147430 events. 98963/147430 cut-off events. For 16123/16132 co-relation queries the response was YES. Maximal size of possible extension queue 5861. Compared 1218819 event pairs, 58534 based on Foata normal form. 0/97624 useless extension candidates. Maximal degree in co-relation 285503. Up to 95465 conditions per place. [2023-08-29 23:22:35,586 INFO L137 encePairwiseOnDemand]: 481/488 looper letters, 121 selfloop transitions, 6 changer transitions 0/178 dead transitions. [2023-08-29 23:22:35,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 178 transitions, 768 flow [2023-08-29 23:22:35,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:22:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:22:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 854 transitions. [2023-08-29 23:22:35,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-08-29 23:22:35,589 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 854 transitions. [2023-08-29 23:22:35,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 854 transitions. [2023-08-29 23:22:35,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:22:35,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 854 transitions. [2023-08-29 23:22:35,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:35,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:35,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:35,595 INFO L175 Difference]: Start difference. First operand has 112 places, 116 transitions, 319 flow. Second operand 3 states and 854 transitions. [2023-08-29 23:22:35,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 178 transitions, 768 flow [2023-08-29 23:22:35,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 178 transitions, 756 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:22:35,618 INFO L231 Difference]: Finished difference. Result has 114 places, 121 transitions, 361 flow [2023-08-29 23:22:35,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=361, PETRI_PLACES=114, PETRI_TRANSITIONS=121} [2023-08-29 23:22:35,619 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -9 predicate places. [2023-08-29 23:22:35,620 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 121 transitions, 361 flow [2023-08-29 23:22:35,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:35,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:22:35,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:22:35,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 23:22:35,621 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:22:35,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:22:35,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1006467715, now seen corresponding path program 1 times [2023-08-29 23:22:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:22:35,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168515009] [2023-08-29 23:22:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:22:35,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:22:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:22:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:22:35,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:22:35,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168515009] [2023-08-29 23:22:35,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168515009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:22:35,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:22:35,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:22:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175749076] [2023-08-29 23:22:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:22:35,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:22:35,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:22:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:22:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:22:35,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 488 [2023-08-29 23:22:35,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 121 transitions, 361 flow. Second operand has 4 states, 4 states have (on average 240.5) internal successors, (962), 4 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:35,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:22:35,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 488 [2023-08-29 23:22:35,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:22:42,821 INFO L130 PetriNetUnfolder]: 81264/128171 cut-off events. [2023-08-29 23:22:42,822 INFO L131 PetriNetUnfolder]: For 30115/30316 co-relation queries the response was YES. [2023-08-29 23:22:43,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256799 conditions, 128171 events. 81264/128171 cut-off events. For 30115/30316 co-relation queries the response was YES. Maximal size of possible extension queue 5056. Compared 1135846 event pairs, 57381 based on Foata normal form. 3922/97901 useless extension candidates. Maximal degree in co-relation 256792. Up to 90238 conditions per place. [2023-08-29 23:22:43,665 INFO L137 encePairwiseOnDemand]: 481/488 looper letters, 110 selfloop transitions, 13 changer transitions 0/178 dead transitions. [2023-08-29 23:22:43,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 178 transitions, 786 flow [2023-08-29 23:22:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:22:43,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:22:43,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 823 transitions. [2023-08-29 23:22:43,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5621584699453552 [2023-08-29 23:22:43,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 823 transitions. [2023-08-29 23:22:43,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 823 transitions. [2023-08-29 23:22:43,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:22:43,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 823 transitions. [2023-08-29 23:22:43,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:43,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:43,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:43,673 INFO L175 Difference]: Start difference. First operand has 114 places, 121 transitions, 361 flow. Second operand 3 states and 823 transitions. [2023-08-29 23:22:43,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 178 transitions, 786 flow [2023-08-29 23:22:43,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 178 transitions, 770 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:22:43,712 INFO L231 Difference]: Finished difference. Result has 116 places, 131 transitions, 473 flow [2023-08-29 23:22:43,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=473, PETRI_PLACES=116, PETRI_TRANSITIONS=131} [2023-08-29 23:22:43,713 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -7 predicate places. [2023-08-29 23:22:43,713 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 131 transitions, 473 flow [2023-08-29 23:22:43,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 240.5) internal successors, (962), 4 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:43,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:22:43,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:22:43,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 23:22:43,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:22:43,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:22:43,714 INFO L85 PathProgramCache]: Analyzing trace with hash -638025744, now seen corresponding path program 1 times [2023-08-29 23:22:43,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:22:43,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486786817] [2023-08-29 23:22:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:22:43,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:22:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:22:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:22:43,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:22:43,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486786817] [2023-08-29 23:22:43,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486786817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:22:43,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:22:43,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:22:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766633196] [2023-08-29 23:22:43,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:22:43,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:22:43,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:22:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:22:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:22:44,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 488 [2023-08-29 23:22:44,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 131 transitions, 473 flow. Second operand has 4 states, 4 states have (on average 238.5) internal successors, (954), 4 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:44,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:22:44,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 488 [2023-08-29 23:22:44,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:22:50,377 INFO L130 PetriNetUnfolder]: 65439/106009 cut-off events. [2023-08-29 23:22:50,378 INFO L131 PetriNetUnfolder]: For 40253/40265 co-relation queries the response was YES. [2023-08-29 23:22:50,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217332 conditions, 106009 events. 65439/106009 cut-off events. For 40253/40265 co-relation queries the response was YES. Maximal size of possible extension queue 3891. Compared 948551 event pairs, 42852 based on Foata normal form. 4307/81932 useless extension candidates. Maximal degree in co-relation 217324. Up to 62329 conditions per place. [2023-08-29 23:22:51,206 INFO L137 encePairwiseOnDemand]: 479/488 looper letters, 176 selfloop transitions, 13 changer transitions 0/240 dead transitions. [2023-08-29 23:22:51,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 240 transitions, 1246 flow [2023-08-29 23:22:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:22:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:22:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1099 transitions. [2023-08-29 23:22:51,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630122950819673 [2023-08-29 23:22:51,230 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1099 transitions. [2023-08-29 23:22:51,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1099 transitions. [2023-08-29 23:22:51,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:22:51,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1099 transitions. [2023-08-29 23:22:51,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:51,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:51,236 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:51,247 INFO L175 Difference]: Start difference. First operand has 116 places, 131 transitions, 473 flow. Second operand 4 states and 1099 transitions. [2023-08-29 23:22:51,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 240 transitions, 1246 flow [2023-08-29 23:22:51,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 240 transitions, 1202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:22:51,290 INFO L231 Difference]: Finished difference. Result has 120 places, 141 transitions, 573 flow [2023-08-29 23:22:51,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=573, PETRI_PLACES=120, PETRI_TRANSITIONS=141} [2023-08-29 23:22:51,307 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -3 predicate places. [2023-08-29 23:22:51,307 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 141 transitions, 573 flow [2023-08-29 23:22:51,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 238.5) internal successors, (954), 4 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:51,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:22:51,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:22:51,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 23:22:51,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:22:51,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:22:51,309 INFO L85 PathProgramCache]: Analyzing trace with hash -98376214, now seen corresponding path program 1 times [2023-08-29 23:22:51,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:22:51,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980394136] [2023-08-29 23:22:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:22:51,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:22:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:22:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:22:51,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:22:51,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980394136] [2023-08-29 23:22:51,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980394136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:22:51,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:22:51,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:22:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871569334] [2023-08-29 23:22:51,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:22:51,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:22:51,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:22:51,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:22:51,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:22:51,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 488 [2023-08-29 23:22:51,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 141 transitions, 573 flow. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:51,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:22:51,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 488 [2023-08-29 23:22:51,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:22:57,303 INFO L130 PetriNetUnfolder]: 64953/98439 cut-off events. [2023-08-29 23:22:57,303 INFO L131 PetriNetUnfolder]: For 38913/39251 co-relation queries the response was YES. [2023-08-29 23:22:57,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210577 conditions, 98439 events. 64953/98439 cut-off events. For 38913/39251 co-relation queries the response was YES. Maximal size of possible extension queue 3702. Compared 807105 event pairs, 23507 based on Foata normal form. 2258/72122 useless extension candidates. Maximal degree in co-relation 210567. Up to 70798 conditions per place. [2023-08-29 23:22:58,187 INFO L137 encePairwiseOnDemand]: 484/488 looper letters, 112 selfloop transitions, 8 changer transitions 0/177 dead transitions. [2023-08-29 23:22:58,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 177 transitions, 994 flow [2023-08-29 23:22:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:22:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:22:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 850 transitions. [2023-08-29 23:22:58,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806010928961749 [2023-08-29 23:22:58,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 850 transitions. [2023-08-29 23:22:58,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 850 transitions. [2023-08-29 23:22:58,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:22:58,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 850 transitions. [2023-08-29 23:22:58,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:58,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:58,193 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:58,193 INFO L175 Difference]: Start difference. First operand has 120 places, 141 transitions, 573 flow. Second operand 3 states and 850 transitions. [2023-08-29 23:22:58,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 177 transitions, 994 flow [2023-08-29 23:22:58,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 177 transitions, 994 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 23:22:58,224 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 585 flow [2023-08-29 23:22:58,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=585, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2023-08-29 23:22:58,225 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -3 predicate places. [2023-08-29 23:22:58,225 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 585 flow [2023-08-29 23:22:58,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:58,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:22:58,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:22:58,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 23:22:58,226 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:22:58,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:22:58,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1086867388, now seen corresponding path program 1 times [2023-08-29 23:22:58,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:22:58,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223898100] [2023-08-29 23:22:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:22:58,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:22:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:22:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:22:58,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:22:58,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223898100] [2023-08-29 23:22:58,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223898100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:22:58,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:22:58,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:22:58,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148218243] [2023-08-29 23:22:58,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:22:58,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:22:58,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:22:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:22:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:22:58,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 488 [2023-08-29 23:22:58,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 585 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:22:58,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:22:58,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 488 [2023-08-29 23:22:58,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:03,963 INFO L130 PetriNetUnfolder]: 57497/93374 cut-off events. [2023-08-29 23:23:03,964 INFO L131 PetriNetUnfolder]: For 42561/42607 co-relation queries the response was YES. [2023-08-29 23:23:04,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197488 conditions, 93374 events. 57497/93374 cut-off events. For 42561/42607 co-relation queries the response was YES. Maximal size of possible extension queue 3182. Compared 832170 event pairs, 20048 based on Foata normal form. 0/69455 useless extension candidates. Maximal degree in co-relation 197477. Up to 58689 conditions per place. [2023-08-29 23:23:04,552 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 122 selfloop transitions, 17 changer transitions 0/194 dead transitions. [2023-08-29 23:23:04,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 194 transitions, 1086 flow [2023-08-29 23:23:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:23:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:23:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 835 transitions. [2023-08-29 23:23:04,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703551912568307 [2023-08-29 23:23:04,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 835 transitions. [2023-08-29 23:23:04,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 835 transitions. [2023-08-29 23:23:04,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:04,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 835 transitions. [2023-08-29 23:23:04,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:04,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:04,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:04,561 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 585 flow. Second operand 3 states and 835 transitions. [2023-08-29 23:23:04,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 194 transitions, 1086 flow [2023-08-29 23:23:04,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 194 transitions, 1062 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:23:04,619 INFO L231 Difference]: Finished difference. Result has 122 places, 150 transitions, 733 flow [2023-08-29 23:23:04,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=733, PETRI_PLACES=122, PETRI_TRANSITIONS=150} [2023-08-29 23:23:04,620 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -1 predicate places. [2023-08-29 23:23:04,620 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 150 transitions, 733 flow [2023-08-29 23:23:04,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:04,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:04,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:23:04,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 23:23:04,620 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:04,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:04,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1086867389, now seen corresponding path program 1 times [2023-08-29 23:23:04,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:04,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849211282] [2023-08-29 23:23:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:04,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:04,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:04,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849211282] [2023-08-29 23:23:04,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849211282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:04,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:04,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 23:23:04,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083231984] [2023-08-29 23:23:04,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:04,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 23:23:04,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:04,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 23:23:04,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 23:23:04,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 488 [2023-08-29 23:23:04,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 150 transitions, 733 flow. Second operand has 4 states, 4 states have (on average 243.75) internal successors, (975), 4 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:04,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:04,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 488 [2023-08-29 23:23:04,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:09,123 INFO L130 PetriNetUnfolder]: 43065/68184 cut-off events. [2023-08-29 23:23:09,123 INFO L131 PetriNetUnfolder]: For 45526/45590 co-relation queries the response was YES. [2023-08-29 23:23:09,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155735 conditions, 68184 events. 43065/68184 cut-off events. For 45526/45590 co-relation queries the response was YES. Maximal size of possible extension queue 2315. Compared 563566 event pairs, 14447 based on Foata normal form. 3677/54480 useless extension candidates. Maximal degree in co-relation 155723. Up to 42657 conditions per place. [2023-08-29 23:23:09,546 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 125 selfloop transitions, 21 changer transitions 0/200 dead transitions. [2023-08-29 23:23:09,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 200 transitions, 1221 flow [2023-08-29 23:23:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 23:23:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 23:23:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1078 transitions. [2023-08-29 23:23:09,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522540983606558 [2023-08-29 23:23:09,549 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1078 transitions. [2023-08-29 23:23:09,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1078 transitions. [2023-08-29 23:23:09,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:09,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1078 transitions. [2023-08-29 23:23:09,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 269.5) internal successors, (1078), 4 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:09,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:09,555 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:09,555 INFO L175 Difference]: Start difference. First operand has 122 places, 150 transitions, 733 flow. Second operand 4 states and 1078 transitions. [2023-08-29 23:23:09,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 200 transitions, 1221 flow [2023-08-29 23:23:09,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 200 transitions, 1187 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:23:09,595 INFO L231 Difference]: Finished difference. Result has 121 places, 148 transitions, 737 flow [2023-08-29 23:23:09,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=737, PETRI_PLACES=121, PETRI_TRANSITIONS=148} [2023-08-29 23:23:09,596 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, -2 predicate places. [2023-08-29 23:23:09,596 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 148 transitions, 737 flow [2023-08-29 23:23:09,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 243.75) internal successors, (975), 4 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:09,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:09,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:23:09,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 23:23:09,597 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:09,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:09,598 INFO L85 PathProgramCache]: Analyzing trace with hash -98376215, now seen corresponding path program 1 times [2023-08-29 23:23:09,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:09,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408824912] [2023-08-29 23:23:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:09,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:09,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:09,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408824912] [2023-08-29 23:23:09,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408824912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:09,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:09,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:23:09,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848055478] [2023-08-29 23:23:09,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:09,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:23:09,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:09,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:23:09,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:23:09,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 488 [2023-08-29 23:23:09,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 148 transitions, 737 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:09,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:09,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 488 [2023-08-29 23:23:09,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:14,456 INFO L130 PetriNetUnfolder]: 49871/77670 cut-off events. [2023-08-29 23:23:14,457 INFO L131 PetriNetUnfolder]: For 53053/53348 co-relation queries the response was YES. [2023-08-29 23:23:14,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178722 conditions, 77670 events. 49871/77670 cut-off events. For 53053/53348 co-relation queries the response was YES. Maximal size of possible extension queue 2563. Compared 638973 event pairs, 32837 based on Foata normal form. 78/57681 useless extension candidates. Maximal degree in co-relation 178710. Up to 44837 conditions per place. [2023-08-29 23:23:15,130 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 130 selfloop transitions, 17 changer transitions 0/200 dead transitions. [2023-08-29 23:23:15,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 200 transitions, 1238 flow [2023-08-29 23:23:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:23:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:23:15,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2023-08-29 23:23:15,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710382513661202 [2023-08-29 23:23:15,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2023-08-29 23:23:15,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2023-08-29 23:23:15,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:15,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2023-08-29 23:23:15,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:15,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:15,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:15,137 INFO L175 Difference]: Start difference. First operand has 121 places, 148 transitions, 737 flow. Second operand 3 states and 836 transitions. [2023-08-29 23:23:15,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 200 transitions, 1238 flow [2023-08-29 23:23:15,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 200 transitions, 1201 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 23:23:15,246 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 858 flow [2023-08-29 23:23:15,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=858, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2023-08-29 23:23:15,247 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2023-08-29 23:23:15,247 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 858 flow [2023-08-29 23:23:15,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:15,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:15,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:23:15,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 23:23:15,248 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:15,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1859653487, now seen corresponding path program 1 times [2023-08-29 23:23:15,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:15,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333201739] [2023-08-29 23:23:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:15,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:15,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:15,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333201739] [2023-08-29 23:23:15,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333201739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:15,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:15,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:23:15,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355030481] [2023-08-29 23:23:15,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:15,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:23:15,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:23:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:23:15,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 488 [2023-08-29 23:23:15,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 858 flow. Second operand has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:15,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:15,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 488 [2023-08-29 23:23:15,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 23:23:20,524 INFO L130 PetriNetUnfolder]: 55312/84728 cut-off events. [2023-08-29 23:23:20,524 INFO L131 PetriNetUnfolder]: For 66904/67468 co-relation queries the response was YES. [2023-08-29 23:23:20,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201409 conditions, 84728 events. 55312/84728 cut-off events. For 66904/67468 co-relation queries the response was YES. Maximal size of possible extension queue 2919. Compared 685443 event pairs, 19449 based on Foata normal form. 63/65689 useless extension candidates. Maximal degree in co-relation 201396. Up to 51314 conditions per place. [2023-08-29 23:23:21,090 INFO L137 encePairwiseOnDemand]: 480/488 looper letters, 130 selfloop transitions, 24 changer transitions 0/213 dead transitions. [2023-08-29 23:23:21,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 213 transitions, 1417 flow [2023-08-29 23:23:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 23:23:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 23:23:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 835 transitions. [2023-08-29 23:23:21,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703551912568307 [2023-08-29 23:23:21,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 835 transitions. [2023-08-29 23:23:21,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 835 transitions. [2023-08-29 23:23:21,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 23:23:21,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 835 transitions. [2023-08-29 23:23:21,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:21,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:21,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:21,097 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 858 flow. Second operand 3 states and 835 transitions. [2023-08-29 23:23:21,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 213 transitions, 1417 flow [2023-08-29 23:23:21,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 213 transitions, 1381 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 23:23:21,146 INFO L231 Difference]: Finished difference. Result has 125 places, 170 transitions, 1061 flow [2023-08-29 23:23:21,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1061, PETRI_PLACES=125, PETRI_TRANSITIONS=170} [2023-08-29 23:23:21,147 INFO L281 CegarLoopForPetriNet]: 123 programPoint places, 2 predicate places. [2023-08-29 23:23:21,147 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 170 transitions, 1061 flow [2023-08-29 23:23:21,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:21,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 23:23:21,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 23:23:21,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 23:23:21,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread4Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-08-29 23:23:21,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 23:23:21,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1859653486, now seen corresponding path program 1 times [2023-08-29 23:23:21,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 23:23:21,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623997778] [2023-08-29 23:23:21,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 23:23:21,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 23:23:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 23:23:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 23:23:21,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 23:23:21,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623997778] [2023-08-29 23:23:21,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623997778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 23:23:21,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 23:23:21,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 23:23:21,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836726729] [2023-08-29 23:23:21,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 23:23:21,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 23:23:21,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 23:23:21,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 23:23:21,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 23:23:21,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 488 [2023-08-29 23:23:21,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 170 transitions, 1061 flow. Second operand has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 23:23:21,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 23:23:21,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 488 [2023-08-29 23:23:21,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand