./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/queue.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/pthread/queue.i -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 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 22:07:34,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:07:34,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:07:34,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:07:34,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:07:34,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:07:34,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:07:34,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:07:34,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:07:34,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:07:34,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:07:34,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:07:34,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:07:34,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:07:34,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:07:34,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:07:34,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:07:34,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:07:34,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:07:34,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:07:34,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:07:34,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:07:34,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:07:34,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:07:34,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:07:34,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:07:34,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:07:34,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:07:34,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:07:34,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:07:34,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:07:34,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:07:34,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:07:34,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:07:34,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:07:34,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:07:34,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:07:34,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:07:34,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:07:34,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:07:34,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:07:34,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:07:34,955 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:07:34,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:07:34,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:07:34,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:07:34,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:07:34,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:07:34,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:07:34,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:07:34,959 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:07:34,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:07:34,960 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:07:34,960 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:07:34,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:07:34,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:07:34,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:07:34,960 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:07:34,960 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:07:34,961 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:07:34,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:07:34,961 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:07:34,961 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:07:34,961 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:07:34,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:07:34,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:07:34,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:07:34,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:07:34,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:07:34,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:07:34,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:07:34,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:07:34,963 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:07:34,963 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:07:34,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:07:34,964 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:07:34,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:07:35,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:07:35,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:07:35,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:07:35,308 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:07:35,309 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:07:35,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue.i [2023-08-31 22:07:36,568 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:07:36,825 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:07:36,826 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i [2023-08-31 22:07:36,843 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb0942a7b/840bdb279fb542d0a6b429f3b3cc0451/FLAGeb7cbe08e [2023-08-31 22:07:36,858 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb0942a7b/840bdb279fb542d0a6b429f3b3cc0451 [2023-08-31 22:07:36,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:07:36,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:07:36,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:07:36,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:07:36,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:07:36,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:07:36" (1/1) ... [2023-08-31 22:07:36,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc7579d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:36, skipping insertion in model container [2023-08-31 22:07:36,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:07:36" (1/1) ... [2023-08-31 22:07:36,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:07:36,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:07:37,413 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43284,43297] [2023-08-31 22:07:37,421 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43491,43504] [2023-08-31 22:07:37,426 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43772,43785] [2023-08-31 22:07:37,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:07:37,448 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:07:37,515 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43284,43297] [2023-08-31 22:07:37,518 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43491,43504] [2023-08-31 22:07:37,524 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43772,43785] [2023-08-31 22:07:37,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:07:37,628 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:07:37,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37 WrapperNode [2023-08-31 22:07:37,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:07:37,630 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:07:37,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:07:37,630 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:07:37,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,712 INFO L138 Inliner]: procedures = 274, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 252 [2023-08-31 22:07:37,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:07:37,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:07:37,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:07:37,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:07:37,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,777 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:07:37,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:07:37,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:07:37,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:07:37,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (1/1) ... [2023-08-31 22:07:37,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:07:37,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:07:37,826 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) [2023-08-31 22:07:37,847 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 [2023-08-31 22:07:37,862 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:07:37,862 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:07:37,863 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:07:37,863 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:07:37,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:07:37,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:07:37,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:07:37,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:07:37,864 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 22:07:37,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:07:37,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:07:37,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:07:37,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:07:37,866 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 22:07:38,064 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:07:38,067 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:07:38,601 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:07:38,615 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:07:38,615 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:07:38,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:07:38 BoogieIcfgContainer [2023-08-31 22:07:38,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:07:38,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:07:38,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:07:38,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:07:38,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:07:36" (1/3) ... [2023-08-31 22:07:38,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c26e638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:07:38, skipping insertion in model container [2023-08-31 22:07:38,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37" (2/3) ... [2023-08-31 22:07:38,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c26e638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 10:07:38, skipping insertion in model container [2023-08-31 22:07:38,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:07:38" (3/3) ... [2023-08-31 22:07:38,626 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-08-31 22:07:38,642 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:07:38,642 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-08-31 22:07:38,642 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:07:38,793 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 22:07:38,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 346 transitions, 708 flow [2023-08-31 22:07:38,934 INFO L130 PetriNetUnfolder]: 15/344 cut-off events. [2023-08-31 22:07:38,935 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:07:38,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 344 events. 15/344 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 763 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 248. Up to 2 conditions per place. [2023-08-31 22:07:38,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 338 places, 346 transitions, 708 flow [2023-08-31 22:07:38,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 340 transitions, 692 flow [2023-08-31 22:07:38,967 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:07:38,981 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 340 transitions, 692 flow [2023-08-31 22:07:38,984 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 340 transitions, 692 flow [2023-08-31 22:07:38,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 340 transitions, 692 flow [2023-08-31 22:07:39,071 INFO L130 PetriNetUnfolder]: 15/340 cut-off events. [2023-08-31 22:07:39,072 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:07:39,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 340 events. 15/340 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 751 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 248. Up to 2 conditions per place. [2023-08-31 22:07:39,087 INFO L119 LiptonReduction]: Number of co-enabled transitions 28780 [2023-08-31 22:07:52,640 INFO L134 LiptonReduction]: Checked pairs total: 106826 [2023-08-31 22:07:52,641 INFO L136 LiptonReduction]: Total number of compositions: 450 [2023-08-31 22:07:52,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:07:52,658 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;@896b7a4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:07:52,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-08-31 22:07:52,660 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:07:52,660 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:07:52,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:52,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:07:52,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:52,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1457, now seen corresponding path program 1 times [2023-08-31 22:07:52,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:52,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20847702] [2023-08-31 22:07:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:52,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:52,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:52,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20847702] [2023-08-31 22:07:52,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20847702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:52,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:52,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:07:52,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16454109] [2023-08-31 22:07:52,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:52,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:07:52,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:52,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:07:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:07:52,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 796 [2023-08-31 22:07:52,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 145 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 333.5) internal successors, (667), 2 states have internal predecessors, (667), 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) [2023-08-31 22:07:52,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:52,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 796 [2023-08-31 22:07:52,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:54,065 INFO L130 PetriNetUnfolder]: 7683/12375 cut-off events. [2023-08-31 22:07:54,067 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-31 22:07:54,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24099 conditions, 12375 events. 7683/12375 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 73448 event pairs, 6755 based on Foata normal form. 268/6741 useless extension candidates. Maximal degree in co-relation 23685. Up to 11611 conditions per place. [2023-08-31 22:07:54,140 INFO L137 encePairwiseOnDemand]: 747/796 looper letters, 84 selfloop transitions, 0 changer transitions 0/94 dead transitions. [2023-08-31 22:07:54,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 94 transitions, 368 flow [2023-08-31 22:07:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:07:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:07:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 799 transitions. [2023-08-31 22:07:54,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018844221105527 [2023-08-31 22:07:54,160 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 799 transitions. [2023-08-31 22:07:54,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 799 transitions. [2023-08-31 22:07:54,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:54,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 799 transitions. [2023-08-31 22:07:54,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 399.5) internal successors, (799), 2 states have internal predecessors, (799), 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) [2023-08-31 22:07:54,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 796.0) internal successors, (2388), 3 states have internal predecessors, (2388), 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) [2023-08-31 22:07:54,179 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 796.0) internal successors, (2388), 3 states have internal predecessors, (2388), 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) [2023-08-31 22:07:54,181 INFO L175 Difference]: Start difference. First operand has 141 places, 145 transitions, 302 flow. Second operand 2 states and 799 transitions. [2023-08-31 22:07:54,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 94 transitions, 368 flow [2023-08-31 22:07:54,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 360 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:07:54,188 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 192 flow [2023-08-31 22:07:54,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2023-08-31 22:07:54,193 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -51 predicate places. [2023-08-31 22:07:54,194 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 192 flow [2023-08-31 22:07:54,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 333.5) internal successors, (667), 2 states have internal predecessors, (667), 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) [2023-08-31 22:07:54,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:54,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:54,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:07:54,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:54,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1442672, now seen corresponding path program 1 times [2023-08-31 22:07:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:54,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353836830] [2023-08-31 22:07:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:54,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:54,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:54,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353836830] [2023-08-31 22:07:54,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353836830] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:54,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:54,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:54,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935581375] [2023-08-31 22:07:54,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:54,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:54,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:54,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:54,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 796 [2023-08-31 22:07:54,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 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) [2023-08-31 22:07:54,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:54,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 796 [2023-08-31 22:07:54,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:55,576 INFO L130 PetriNetUnfolder]: 7613/12235 cut-off events. [2023-08-31 22:07:55,576 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 22:07:55,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23757 conditions, 12235 events. 7613/12235 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 72226 event pairs, 6692 based on Foata normal form. 0/6429 useless extension candidates. Maximal degree in co-relation 23754. Up to 11475 conditions per place. [2023-08-31 22:07:55,627 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 80 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-31 22:07:55,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 92 transitions, 352 flow [2023-08-31 22:07:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:55,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1056 transitions. [2023-08-31 22:07:55,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44221105527638194 [2023-08-31 22:07:55,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1056 transitions. [2023-08-31 22:07:55,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1056 transitions. [2023-08-31 22:07:55,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:55,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1056 transitions. [2023-08-31 22:07:55,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 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) [2023-08-31 22:07:55,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:07:55,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:07:55,640 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 192 flow. Second operand 3 states and 1056 transitions. [2023-08-31 22:07:55,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 92 transitions, 352 flow [2023-08-31 22:07:55,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 92 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:07:55,642 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 192 flow [2023-08-31 22:07:55,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2023-08-31 22:07:55,643 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -51 predicate places. [2023-08-31 22:07:55,644 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 192 flow [2023-08-31 22:07:55,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 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) [2023-08-31 22:07:55,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:55,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:07:55,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:55,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:55,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1442674, now seen corresponding path program 1 times [2023-08-31 22:07:55,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:55,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699153765] [2023-08-31 22:07:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:55,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:55,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699153765] [2023-08-31 22:07:55,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699153765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:55,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:55,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:55,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358951806] [2023-08-31 22:07:55,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:55,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:55,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:55,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:55,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-31 22:07:55,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 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) [2023-08-31 22:07:55,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:55,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-31 22:07:55,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:56,921 INFO L130 PetriNetUnfolder]: 7543/12095 cut-off events. [2023-08-31 22:07:56,921 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 22:07:56,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23486 conditions, 12095 events. 7543/12095 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 71052 event pairs, 6629 based on Foata normal form. 0/6385 useless extension candidates. Maximal degree in co-relation 23482. Up to 11341 conditions per place. [2023-08-31 22:07:56,976 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 78 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-31 22:07:56,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 348 flow [2023-08-31 22:07:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-31 22:07:56,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463986599664992 [2023-08-31 22:07:56,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-31 22:07:56,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-31 22:07:56,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:56,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-31 22:07:56,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.3333333333333) internal successors, (1066), 3 states have internal predecessors, (1066), 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) [2023-08-31 22:07:56,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:07:56,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:07:56,989 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 192 flow. Second operand 3 states and 1066 transitions. [2023-08-31 22:07:56,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 348 flow [2023-08-31 22:07:56,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:07:56,991 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 188 flow [2023-08-31 22:07:56,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2023-08-31 22:07:56,992 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-08-31 22:07:56,993 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 188 flow [2023-08-31 22:07:56,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 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) [2023-08-31 22:07:56,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:56,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:56,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:07:56,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:56,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:56,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1442788, now seen corresponding path program 1 times [2023-08-31 22:07:56,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:56,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333088917] [2023-08-31 22:07:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:56,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:57,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:57,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333088917] [2023-08-31 22:07:57,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333088917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:57,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:57,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:57,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019112690] [2023-08-31 22:07:57,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:57,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:57,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:57,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 796 [2023-08-31 22:07:57,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 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) [2023-08-31 22:07:57,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:57,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 796 [2023-08-31 22:07:57,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:58,007 INFO L130 PetriNetUnfolder]: 6743/10819 cut-off events. [2023-08-31 22:07:58,007 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 22:07:58,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20979 conditions, 10819 events. 6743/10819 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 62403 event pairs, 5881 based on Foata normal form. 0/5965 useless extension candidates. Maximal degree in co-relation 20975. Up to 10113 conditions per place. [2023-08-31 22:07:58,055 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 74 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-31 22:07:58,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 332 flow [2023-08-31 22:07:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2023-08-31 22:07:58,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4480737018425461 [2023-08-31 22:07:58,060 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2023-08-31 22:07:58,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2023-08-31 22:07:58,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:58,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2023-08-31 22:07:58,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 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) [2023-08-31 22:07:58,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:07:58,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:07:58,072 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 188 flow. Second operand 3 states and 1070 transitions. [2023-08-31 22:07:58,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 332 flow [2023-08-31 22:07:58,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:07:58,076 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 180 flow [2023-08-31 22:07:58,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-08-31 22:07:58,077 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-08-31 22:07:58,078 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 180 flow [2023-08-31 22:07:58,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 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) [2023-08-31 22:07:58,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:58,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:58,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:07:58,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:58,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1442789, now seen corresponding path program 1 times [2023-08-31 22:07:58,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:58,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747511997] [2023-08-31 22:07:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:58,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:58,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:58,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747511997] [2023-08-31 22:07:58,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747511997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:58,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:58,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:58,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661674600] [2023-08-31 22:07:58,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:58,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:58,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:58,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:58,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:58,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 796 [2023-08-31 22:07:58,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 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) [2023-08-31 22:07:58,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:58,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 796 [2023-08-31 22:07:58,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:59,052 INFO L130 PetriNetUnfolder]: 5985/9609 cut-off events. [2023-08-31 22:07:59,053 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 22:07:59,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18604 conditions, 9609 events. 5985/9609 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 54307 event pairs, 5175 based on Foata normal form. 0/5551 useless extension candidates. Maximal degree in co-relation 18600. Up to 8952 conditions per place. [2023-08-31 22:07:59,091 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 71 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-31 22:07:59,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 316 flow [2023-08-31 22:07:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-31 22:07:59,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463986599664992 [2023-08-31 22:07:59,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-31 22:07:59,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-31 22:07:59,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:59,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-31 22:07:59,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.3333333333333) internal successors, (1066), 3 states have internal predecessors, (1066), 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) [2023-08-31 22:07:59,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:07:59,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:07:59,103 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 180 flow. Second operand 3 states and 1066 transitions. [2023-08-31 22:07:59,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 316 flow [2023-08-31 22:07:59,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:07:59,106 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 170 flow [2023-08-31 22:07:59,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2023-08-31 22:07:59,109 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -61 predicate places. [2023-08-31 22:07:59,109 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 170 flow [2023-08-31 22:07:59,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 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) [2023-08-31 22:07:59,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:59,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 22:07:59,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:07:59,110 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:59,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash 44726182, now seen corresponding path program 1 times [2023-08-31 22:07:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:59,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103183921] [2023-08-31 22:07:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:59,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:07:59,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:59,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103183921] [2023-08-31 22:07:59,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103183921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:59,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:59,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:07:59,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083761543] [2023-08-31 22:07:59,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:59,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:07:59,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:59,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:07:59,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:07:59,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 796 [2023-08-31 22:07:59,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2023-08-31 22:07:59,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:59,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 796 [2023-08-31 22:07:59,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:00,608 INFO L130 PetriNetUnfolder]: 6294/10012 cut-off events. [2023-08-31 22:08:00,609 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 22:08:00,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19484 conditions, 10012 events. 6294/10012 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 55721 event pairs, 5428 based on Foata normal form. 0/5635 useless extension candidates. Maximal degree in co-relation 19480. Up to 9425 conditions per place. [2023-08-31 22:08:00,664 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 74 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2023-08-31 22:08:00,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 88 transitions, 342 flow [2023-08-31 22:08:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:08:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:08:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1333 transitions. [2023-08-31 22:08:00,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41865577889447236 [2023-08-31 22:08:00,673 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1333 transitions. [2023-08-31 22:08:00,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1333 transitions. [2023-08-31 22:08:00,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:00,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1333 transitions. [2023-08-31 22:08:00,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 333.25) internal successors, (1333), 4 states have internal predecessors, (1333), 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) [2023-08-31 22:08:00,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 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) [2023-08-31 22:08:00,685 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 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) [2023-08-31 22:08:00,685 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 170 flow. Second operand 4 states and 1333 transitions. [2023-08-31 22:08:00,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 88 transitions, 342 flow [2023-08-31 22:08:00,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:08:00,688 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 208 flow [2023-08-31 22:08:00,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2023-08-31 22:08:00,691 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-08-31 22:08:00,691 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 208 flow [2023-08-31 22:08:00,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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) [2023-08-31 22:08:00,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:00,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:00,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:08:00,693 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:00,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:00,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1386452279, now seen corresponding path program 1 times [2023-08-31 22:08:00,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:00,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196978923] [2023-08-31 22:08:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:00,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:01,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:01,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196978923] [2023-08-31 22:08:01,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196978923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:01,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:01,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:01,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661833519] [2023-08-31 22:08:01,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:01,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:08:01,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:01,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:08:01,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:08:04,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 796 [2023-08-31 22:08:04,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 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) [2023-08-31 22:08:04,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:04,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 796 [2023-08-31 22:08:04,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:06,673 INFO L130 PetriNetUnfolder]: 6831/10811 cut-off events. [2023-08-31 22:08:06,673 INFO L131 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2023-08-31 22:08:06,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21695 conditions, 10811 events. 6831/10811 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 61161 event pairs, 1532 based on Foata normal form. 45/6251 useless extension candidates. Maximal degree in co-relation 21689. Up to 9561 conditions per place. [2023-08-31 22:08:06,748 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 107 selfloop transitions, 14 changer transitions 0/129 dead transitions. [2023-08-31 22:08:06,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 548 flow [2023-08-31 22:08:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:08:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:08:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1363 transitions. [2023-08-31 22:08:06,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280778894472362 [2023-08-31 22:08:06,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1363 transitions. [2023-08-31 22:08:06,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1363 transitions. [2023-08-31 22:08:06,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:06,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1363 transitions. [2023-08-31 22:08:06,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 340.75) internal successors, (1363), 4 states have internal predecessors, (1363), 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) [2023-08-31 22:08:06,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 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) [2023-08-31 22:08:06,762 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 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) [2023-08-31 22:08:06,762 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 208 flow. Second operand 4 states and 1363 transitions. [2023-08-31 22:08:06,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 548 flow [2023-08-31 22:08:06,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 548 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:08:06,766 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 293 flow [2023-08-31 22:08:06,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=89, PETRI_TRANSITIONS=96} [2023-08-31 22:08:06,767 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-08-31 22:08:06,767 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 293 flow [2023-08-31 22:08:06,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 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) [2023-08-31 22:08:06,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:06,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:06,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:08:06,769 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:06,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:06,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1386440554, now seen corresponding path program 1 times [2023-08-31 22:08:06,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:06,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407041622] [2023-08-31 22:08:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:06,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:06,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:06,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407041622] [2023-08-31 22:08:06,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407041622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:06,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:06,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:08:06,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639553207] [2023-08-31 22:08:06,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:06,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:06,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:06,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:06,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:06,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-31 22:08:06,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 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) [2023-08-31 22:08:06,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:06,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-31 22:08:06,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:07,583 INFO L130 PetriNetUnfolder]: 4744/7768 cut-off events. [2023-08-31 22:08:07,583 INFO L131 PetriNetUnfolder]: For 1133/1220 co-relation queries the response was YES. [2023-08-31 22:08:07,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16152 conditions, 7768 events. 4744/7768 cut-off events. For 1133/1220 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 43310 event pairs, 3857 based on Foata normal form. 29/4988 useless extension candidates. Maximal degree in co-relation 16143. Up to 7233 conditions per place. [2023-08-31 22:08:07,615 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 80 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-31 22:08:07,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 455 flow [2023-08-31 22:08:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1056 transitions. [2023-08-31 22:08:07,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44221105527638194 [2023-08-31 22:08:07,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1056 transitions. [2023-08-31 22:08:07,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1056 transitions. [2023-08-31 22:08:07,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:07,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1056 transitions. [2023-08-31 22:08:07,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 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) [2023-08-31 22:08:07,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:08:07,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:08:07,626 INFO L175 Difference]: Start difference. First operand has 89 places, 96 transitions, 293 flow. Second operand 3 states and 1056 transitions. [2023-08-31 22:08:07,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 455 flow [2023-08-31 22:08:07,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 453 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 22:08:07,630 INFO L231 Difference]: Finished difference. Result has 90 places, 95 transitions, 293 flow [2023-08-31 22:08:07,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2023-08-31 22:08:07,630 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -51 predicate places. [2023-08-31 22:08:07,631 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 293 flow [2023-08-31 22:08:07,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 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) [2023-08-31 22:08:07,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:07,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:07,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:08:07,632 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:07,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:07,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1386440553, now seen corresponding path program 1 times [2023-08-31 22:08:07,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:07,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439386198] [2023-08-31 22:08:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:07,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:07,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:07,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439386198] [2023-08-31 22:08:07,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439386198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:07,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:07,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:07,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540701334] [2023-08-31 22:08:07,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:07,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:08:07,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:07,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:08:07,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:08:07,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 796 [2023-08-31 22:08:07,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 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) [2023-08-31 22:08:07,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:07,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 796 [2023-08-31 22:08:07,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:08,248 INFO L130 PetriNetUnfolder]: 2928/4987 cut-off events. [2023-08-31 22:08:08,248 INFO L131 PetriNetUnfolder]: For 701/758 co-relation queries the response was YES. [2023-08-31 22:08:08,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10389 conditions, 4987 events. 2928/4987 cut-off events. For 701/758 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 26937 event pairs, 2320 based on Foata normal form. 19/3674 useless extension candidates. Maximal degree in co-relation 10379. Up to 4625 conditions per place. [2023-08-31 22:08:08,269 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 79 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-31 22:08:08,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 453 flow [2023-08-31 22:08:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-31 22:08:08,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43174204355108875 [2023-08-31 22:08:08,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-31 22:08:08,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-31 22:08:08,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:08,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-31 22:08:08,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 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) [2023-08-31 22:08:08,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:08:08,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:08:08,281 INFO L175 Difference]: Start difference. First operand has 90 places, 95 transitions, 293 flow. Second operand 3 states and 1031 transitions. [2023-08-31 22:08:08,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 453 flow [2023-08-31 22:08:08,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 449 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:08,285 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 291 flow [2023-08-31 22:08:08,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2023-08-31 22:08:08,286 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-08-31 22:08:08,286 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 291 flow [2023-08-31 22:08:08,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 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) [2023-08-31 22:08:08,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:08,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-31 22:08:08,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:08:08,287 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:08,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 32222892, now seen corresponding path program 1 times [2023-08-31 22:08:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:08,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335511889] [2023-08-31 22:08:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:08,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:08,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:08,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335511889] [2023-08-31 22:08:08,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335511889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:08,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:08,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:08,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134274795] [2023-08-31 22:08:08,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:08,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:08:08,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:08:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:08:08,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 796 [2023-08-31 22:08:08,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 94 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 311.2) internal successors, (1556), 5 states have internal predecessors, (1556), 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) [2023-08-31 22:08:08,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:08,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 796 [2023-08-31 22:08:08,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:09,114 INFO L130 PetriNetUnfolder]: 2651/4507 cut-off events. [2023-08-31 22:08:09,114 INFO L131 PetriNetUnfolder]: For 634/634 co-relation queries the response was YES. [2023-08-31 22:08:09,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9327 conditions, 4507 events. 2651/4507 cut-off events. For 634/634 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 24091 event pairs, 619 based on Foata normal form. 131/3464 useless extension candidates. Maximal degree in co-relation 9317. Up to 3794 conditions per place. [2023-08-31 22:08:09,136 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 123 selfloop transitions, 6 changer transitions 0/142 dead transitions. [2023-08-31 22:08:09,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 142 transitions, 660 flow [2023-08-31 22:08:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:08:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:08:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1670 transitions. [2023-08-31 22:08:09,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41959798994974873 [2023-08-31 22:08:09,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1670 transitions. [2023-08-31 22:08:09,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1670 transitions. [2023-08-31 22:08:09,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:09,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1670 transitions. [2023-08-31 22:08:09,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 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) [2023-08-31 22:08:09,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 796.0) internal successors, (4776), 6 states have internal predecessors, (4776), 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) [2023-08-31 22:08:09,152 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 796.0) internal successors, (4776), 6 states have internal predecessors, (4776), 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) [2023-08-31 22:08:09,152 INFO L175 Difference]: Start difference. First operand has 89 places, 94 transitions, 291 flow. Second operand 5 states and 1670 transitions. [2023-08-31 22:08:09,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 142 transitions, 660 flow [2023-08-31 22:08:09,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 142 transitions, 656 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:09,158 INFO L231 Difference]: Finished difference. Result has 87 places, 87 transitions, 265 flow [2023-08-31 22:08:09,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2023-08-31 22:08:09,159 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -54 predicate places. [2023-08-31 22:08:09,159 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 265 flow [2023-08-31 22:08:09,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 311.2) internal successors, (1556), 5 states have internal predecessors, (1556), 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) [2023-08-31 22:08:09,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:09,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:09,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:08:09,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:09,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1386512729, now seen corresponding path program 2 times [2023-08-31 22:08:09,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:09,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375844739] [2023-08-31 22:08:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:09,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:09,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375844739] [2023-08-31 22:08:09,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375844739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:09,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:09,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:09,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880581134] [2023-08-31 22:08:09,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:09,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:08:09,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:09,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:08:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:08:12,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 796 [2023-08-31 22:08:12,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 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) [2023-08-31 22:08:12,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:12,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 796 [2023-08-31 22:08:12,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:13,908 INFO L130 PetriNetUnfolder]: 2702/4547 cut-off events. [2023-08-31 22:08:13,908 INFO L131 PetriNetUnfolder]: For 1046/1046 co-relation queries the response was YES. [2023-08-31 22:08:13,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9666 conditions, 4547 events. 2702/4547 cut-off events. For 1046/1046 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 23868 event pairs, 687 based on Foata normal form. 23/3394 useless extension candidates. Maximal degree in co-relation 9656. Up to 4014 conditions per place. [2023-08-31 22:08:13,921 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 96 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2023-08-31 22:08:13,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 116 transitions, 549 flow [2023-08-31 22:08:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:08:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:08:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1348 transitions. [2023-08-31 22:08:13,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42336683417085424 [2023-08-31 22:08:13,925 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1348 transitions. [2023-08-31 22:08:13,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1348 transitions. [2023-08-31 22:08:13,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:13,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1348 transitions. [2023-08-31 22:08:13,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 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) [2023-08-31 22:08:13,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 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) [2023-08-31 22:08:13,933 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 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) [2023-08-31 22:08:13,933 INFO L175 Difference]: Start difference. First operand has 87 places, 87 transitions, 265 flow. Second operand 4 states and 1348 transitions. [2023-08-31 22:08:13,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 116 transitions, 549 flow [2023-08-31 22:08:13,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 116 transitions, 536 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-31 22:08:13,937 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 298 flow [2023-08-31 22:08:13,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2023-08-31 22:08:13,938 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-08-31 22:08:13,938 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 298 flow [2023-08-31 22:08:13,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 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) [2023-08-31 22:08:13,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:13,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:13,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:08:13,939 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:13,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1249641130, now seen corresponding path program 1 times [2023-08-31 22:08:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:13,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019379938] [2023-08-31 22:08:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:13,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:13,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:13,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019379938] [2023-08-31 22:08:13,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019379938] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:13,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:13,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:13,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329506347] [2023-08-31 22:08:13,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:13,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:13,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:13,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:13,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-31 22:08:13,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 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) [2023-08-31 22:08:13,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:13,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-31 22:08:13,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:14,292 INFO L130 PetriNetUnfolder]: 1767/3097 cut-off events. [2023-08-31 22:08:14,293 INFO L131 PetriNetUnfolder]: For 264/264 co-relation queries the response was YES. [2023-08-31 22:08:14,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6278 conditions, 3097 events. 1767/3097 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 13959 event pairs, 916 based on Foata normal form. 0/2323 useless extension candidates. Maximal degree in co-relation 6267. Up to 1824 conditions per place. [2023-08-31 22:08:14,309 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 95 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2023-08-31 22:08:14,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 109 transitions, 492 flow [2023-08-31 22:08:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2023-08-31 22:08:14,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45226130653266333 [2023-08-31 22:08:14,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2023-08-31 22:08:14,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2023-08-31 22:08:14,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:14,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2023-08-31 22:08:14,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.0) internal successors, (1080), 3 states have internal predecessors, (1080), 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) [2023-08-31 22:08:14,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:08:14,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:08:14,319 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 298 flow. Second operand 3 states and 1080 transitions. [2023-08-31 22:08:14,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 109 transitions, 492 flow [2023-08-31 22:08:14,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 457 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-31 22:08:14,322 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 213 flow [2023-08-31 22:08:14,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2023-08-31 22:08:14,322 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -58 predicate places. [2023-08-31 22:08:14,323 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 213 flow [2023-08-31 22:08:14,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 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) [2023-08-31 22:08:14,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:14,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:08:14,323 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:14,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash 9126032, now seen corresponding path program 1 times [2023-08-31 22:08:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:14,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673084552] [2023-08-31 22:08:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:14,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:14,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673084552] [2023-08-31 22:08:14,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673084552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:14,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:14,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:08:14,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119930572] [2023-08-31 22:08:14,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:14,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:14,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:14,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:14,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 796 [2023-08-31 22:08:14,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 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) [2023-08-31 22:08:14,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:14,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 796 [2023-08-31 22:08:14,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:14,793 INFO L130 PetriNetUnfolder]: 1648/2856 cut-off events. [2023-08-31 22:08:14,793 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 22:08:14,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5776 conditions, 2856 events. 1648/2856 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12413 event pairs, 1298 based on Foata normal form. 0/2230 useless extension candidates. Maximal degree in co-relation 5768. Up to 2657 conditions per place. [2023-08-31 22:08:14,802 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 64 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-31 22:08:14,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 339 flow [2023-08-31 22:08:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1038 transitions. [2023-08-31 22:08:14,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43467336683417085 [2023-08-31 22:08:14,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1038 transitions. [2023-08-31 22:08:14,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1038 transitions. [2023-08-31 22:08:14,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:14,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1038 transitions. [2023-08-31 22:08:14,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 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) [2023-08-31 22:08:14,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:08:14,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:08:14,812 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 213 flow. Second operand 3 states and 1038 transitions. [2023-08-31 22:08:14,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 339 flow [2023-08-31 22:08:14,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:08:14,815 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 208 flow [2023-08-31 22:08:14,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2023-08-31 22:08:14,816 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -60 predicate places. [2023-08-31 22:08:14,816 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 208 flow [2023-08-31 22:08:14,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 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) [2023-08-31 22:08:14,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:14,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:14,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:08:14,817 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:14,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:14,817 INFO L85 PathProgramCache]: Analyzing trace with hash 9126033, now seen corresponding path program 1 times [2023-08-31 22:08:14,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:14,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176579591] [2023-08-31 22:08:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:14,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:15,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176579591] [2023-08-31 22:08:15,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176579591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:15,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:15,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 22:08:15,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008531702] [2023-08-31 22:08:15,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:15,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:08:15,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:08:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:08:18,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 796 [2023-08-31 22:08:18,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 308.6666666666667) internal successors, (1852), 6 states have internal predecessors, (1852), 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) [2023-08-31 22:08:18,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:18,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 796 [2023-08-31 22:08:18,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:20,376 INFO L130 PetriNetUnfolder]: 1758/3010 cut-off events. [2023-08-31 22:08:20,376 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-31 22:08:20,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6115 conditions, 3010 events. 1758/3010 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12864 event pairs, 1388 based on Foata normal form. 0/2369 useless extension candidates. Maximal degree in co-relation 6107. Up to 2830 conditions per place. [2023-08-31 22:08:20,386 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 68 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2023-08-31 22:08:20,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 394 flow [2023-08-31 22:08:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:08:20,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:08:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2228 transitions. [2023-08-31 22:08:20,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39985642498205315 [2023-08-31 22:08:20,392 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2228 transitions. [2023-08-31 22:08:20,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2228 transitions. [2023-08-31 22:08:20,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:20,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2228 transitions. [2023-08-31 22:08:20,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 318.2857142857143) internal successors, (2228), 7 states have internal predecessors, (2228), 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) [2023-08-31 22:08:20,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 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) [2023-08-31 22:08:20,404 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 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) [2023-08-31 22:08:20,404 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 208 flow. Second operand 7 states and 2228 transitions. [2023-08-31 22:08:20,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 394 flow [2023-08-31 22:08:20,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:20,407 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 267 flow [2023-08-31 22:08:20,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=267, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-08-31 22:08:20,409 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-08-31 22:08:20,409 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 267 flow [2023-08-31 22:08:20,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 308.6666666666667) internal successors, (1852), 6 states have internal predecessors, (1852), 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) [2023-08-31 22:08:20,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:20,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:20,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:08:20,410 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:20,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:20,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1126027934, now seen corresponding path program 1 times [2023-08-31 22:08:20,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:20,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691371449] [2023-08-31 22:08:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:20,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:21,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:21,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691371449] [2023-08-31 22:08:21,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691371449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:21,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:21,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:08:21,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624457526] [2023-08-31 22:08:21,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:21,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:08:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:21,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:08:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:08:24,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 796 [2023-08-31 22:08:24,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 304.57142857142856) internal successors, (2132), 7 states have internal predecessors, (2132), 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) [2023-08-31 22:08:24,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:24,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 796 [2023-08-31 22:08:24,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:25,529 INFO L130 PetriNetUnfolder]: 1838/3137 cut-off events. [2023-08-31 22:08:25,529 INFO L131 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2023-08-31 22:08:25,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6518 conditions, 3137 events. 1838/3137 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 13563 event pairs, 492 based on Foata normal form. 11/2510 useless extension candidates. Maximal degree in co-relation 6507. Up to 2714 conditions per place. [2023-08-31 22:08:25,540 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 101 selfloop transitions, 16 changer transitions 0/125 dead transitions. [2023-08-31 22:08:25,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 595 flow [2023-08-31 22:08:25,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:08:25,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:08:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2234 transitions. [2023-08-31 22:08:25,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009332376166547 [2023-08-31 22:08:25,546 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2234 transitions. [2023-08-31 22:08:25,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2234 transitions. [2023-08-31 22:08:25,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:25,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2234 transitions. [2023-08-31 22:08:25,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.14285714285717) internal successors, (2234), 7 states have internal predecessors, (2234), 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) [2023-08-31 22:08:25,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 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) [2023-08-31 22:08:25,558 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 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) [2023-08-31 22:08:25,558 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 267 flow. Second operand 7 states and 2234 transitions. [2023-08-31 22:08:25,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 595 flow [2023-08-31 22:08:25,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 125 transitions, 577 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 22:08:25,562 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 317 flow [2023-08-31 22:08:25,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2023-08-31 22:08:25,563 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -47 predicate places. [2023-08-31 22:08:25,563 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 317 flow [2023-08-31 22:08:25,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 304.57142857142856) internal successors, (2132), 7 states have internal predecessors, (2132), 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) [2023-08-31 22:08:25,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:25,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:25,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:08:25,564 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:25,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:25,565 INFO L85 PathProgramCache]: Analyzing trace with hash 286371520, now seen corresponding path program 2 times [2023-08-31 22:08:25,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:25,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553866242] [2023-08-31 22:08:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:25,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:25,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:25,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553866242] [2023-08-31 22:08:25,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553866242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:25,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:25,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:25,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748875909] [2023-08-31 22:08:25,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:25,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:08:25,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:25,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:08:25,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:08:25,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 796 [2023-08-31 22:08:25,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 329.5) internal successors, (1318), 4 states have internal predecessors, (1318), 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) [2023-08-31 22:08:25,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:25,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 796 [2023-08-31 22:08:25,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:26,231 INFO L130 PetriNetUnfolder]: 1702/2948 cut-off events. [2023-08-31 22:08:26,231 INFO L131 PetriNetUnfolder]: For 415/422 co-relation queries the response was YES. [2023-08-31 22:08:26,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6187 conditions, 2948 events. 1702/2948 cut-off events. For 415/422 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12832 event pairs, 1339 based on Foata normal form. 7/2341 useless extension candidates. Maximal degree in co-relation 6173. Up to 2744 conditions per place. [2023-08-31 22:08:26,247 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 72 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-31 22:08:26,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 86 transitions, 463 flow [2023-08-31 22:08:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:08:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:08:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1371 transitions. [2023-08-31 22:08:26,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43059045226130654 [2023-08-31 22:08:26,252 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1371 transitions. [2023-08-31 22:08:26,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1371 transitions. [2023-08-31 22:08:26,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:26,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1371 transitions. [2023-08-31 22:08:26,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.75) internal successors, (1371), 4 states have internal predecessors, (1371), 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) [2023-08-31 22:08:26,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 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) [2023-08-31 22:08:26,262 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 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) [2023-08-31 22:08:26,262 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 317 flow. Second operand 4 states and 1371 transitions. [2023-08-31 22:08:26,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 86 transitions, 463 flow [2023-08-31 22:08:26,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 86 transitions, 437 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-31 22:08:26,266 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 293 flow [2023-08-31 22:08:26,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2023-08-31 22:08:26,267 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -48 predicate places. [2023-08-31 22:08:26,267 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 293 flow [2023-08-31 22:08:26,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 329.5) internal successors, (1318), 4 states have internal predecessors, (1318), 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) [2023-08-31 22:08:26,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:26,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:26,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:08:26,268 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:26,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:26,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1084821956, now seen corresponding path program 1 times [2023-08-31 22:08:26,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:26,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816485075] [2023-08-31 22:08:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:26,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:26,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:26,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816485075] [2023-08-31 22:08:26,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816485075] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:26,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:26,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 22:08:26,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778899946] [2023-08-31 22:08:26,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:26,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:08:26,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:08:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:08:26,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 796 [2023-08-31 22:08:26,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 324.8333333333333) internal successors, (1949), 6 states have internal predecessors, (1949), 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) [2023-08-31 22:08:26,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:26,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 796 [2023-08-31 22:08:26,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:27,221 INFO L130 PetriNetUnfolder]: 1690/2953 cut-off events. [2023-08-31 22:08:27,222 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-31 22:08:27,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6120 conditions, 2953 events. 1690/2953 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 13047 event pairs, 456 based on Foata normal form. 0/2361 useless extension candidates. Maximal degree in co-relation 6106. Up to 2282 conditions per place. [2023-08-31 22:08:27,234 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 88 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2023-08-31 22:08:27,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 107 transitions, 530 flow [2023-08-31 22:08:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:08:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:08:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2024 transitions. [2023-08-31 22:08:27,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423785594639866 [2023-08-31 22:08:27,239 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2024 transitions. [2023-08-31 22:08:27,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2024 transitions. [2023-08-31 22:08:27,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:27,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2024 transitions. [2023-08-31 22:08:27,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 337.3333333333333) internal successors, (2024), 6 states have internal predecessors, (2024), 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) [2023-08-31 22:08:27,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 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) [2023-08-31 22:08:27,249 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 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) [2023-08-31 22:08:27,249 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 293 flow. Second operand 6 states and 2024 transitions. [2023-08-31 22:08:27,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 107 transitions, 530 flow [2023-08-31 22:08:27,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 107 transitions, 527 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:27,253 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 302 flow [2023-08-31 22:08:27,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2023-08-31 22:08:27,253 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -46 predicate places. [2023-08-31 22:08:27,253 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 302 flow [2023-08-31 22:08:27,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 324.8333333333333) internal successors, (1949), 6 states have internal predecessors, (1949), 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) [2023-08-31 22:08:27,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:27,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:27,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:08:27,255 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:27,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:27,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1084820515, now seen corresponding path program 1 times [2023-08-31 22:08:27,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:27,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429627089] [2023-08-31 22:08:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:27,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:27,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:27,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429627089] [2023-08-31 22:08:27,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429627089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:27,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:27,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:27,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261660562] [2023-08-31 22:08:27,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:27,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:27,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:27,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:27,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:27,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-31 22:08:27,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 331.3333333333333) internal successors, (994), 3 states have internal predecessors, (994), 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) [2023-08-31 22:08:27,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:27,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-31 22:08:27,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:27,577 INFO L130 PetriNetUnfolder]: 1673/2907 cut-off events. [2023-08-31 22:08:27,578 INFO L131 PetriNetUnfolder]: For 382/389 co-relation queries the response was YES. [2023-08-31 22:08:27,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6072 conditions, 2907 events. 1673/2907 cut-off events. For 382/389 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12717 event pairs, 1311 based on Foata normal form. 19/2338 useless extension candidates. Maximal degree in co-relation 6058. Up to 2655 conditions per place. [2023-08-31 22:08:27,589 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 75 selfloop transitions, 5 changer transitions 0/92 dead transitions. [2023-08-31 22:08:27,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 92 transitions, 479 flow [2023-08-31 22:08:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1053 transitions. [2023-08-31 22:08:27,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44095477386934673 [2023-08-31 22:08:27,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1053 transitions. [2023-08-31 22:08:27,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1053 transitions. [2023-08-31 22:08:27,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:27,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1053 transitions. [2023-08-31 22:08:27,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 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) [2023-08-31 22:08:27,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:08:27,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:08:27,599 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 302 flow. Second operand 3 states and 1053 transitions. [2023-08-31 22:08:27,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 92 transitions, 479 flow [2023-08-31 22:08:27,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 466 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:08:27,602 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 297 flow [2023-08-31 22:08:27,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2023-08-31 22:08:27,603 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -48 predicate places. [2023-08-31 22:08:27,603 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 297 flow [2023-08-31 22:08:27,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.3333333333333) internal successors, (994), 3 states have internal predecessors, (994), 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) [2023-08-31 22:08:27,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:27,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:27,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:08:27,604 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:27,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1163214184, now seen corresponding path program 1 times [2023-08-31 22:08:27,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:27,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797362843] [2023-08-31 22:08:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797362843] [2023-08-31 22:08:28,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797362843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:28,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:28,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:08:28,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316272998] [2023-08-31 22:08:28,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:28,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:08:28,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:28,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:08:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:08:28,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 796 [2023-08-31 22:08:28,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 304.85714285714283) internal successors, (2134), 7 states have internal predecessors, (2134), 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) [2023-08-31 22:08:28,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:28,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 796 [2023-08-31 22:08:28,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:29,315 INFO L130 PetriNetUnfolder]: 1888/3229 cut-off events. [2023-08-31 22:08:29,315 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2023-08-31 22:08:29,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6831 conditions, 3229 events. 1888/3229 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14042 event pairs, 492 based on Foata normal form. 11/2630 useless extension candidates. Maximal degree in co-relation 6817. Up to 2655 conditions per place. [2023-08-31 22:08:29,328 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 98 selfloop transitions, 19 changer transitions 0/125 dead transitions. [2023-08-31 22:08:29,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 125 transitions, 625 flow [2023-08-31 22:08:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:08:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:08:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2230 transitions. [2023-08-31 22:08:29,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002153625269203 [2023-08-31 22:08:29,333 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2230 transitions. [2023-08-31 22:08:29,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2230 transitions. [2023-08-31 22:08:29,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:29,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2230 transitions. [2023-08-31 22:08:29,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 318.57142857142856) internal successors, (2230), 7 states have internal predecessors, (2230), 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) [2023-08-31 22:08:29,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 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) [2023-08-31 22:08:29,345 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 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) [2023-08-31 22:08:29,345 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 297 flow. Second operand 7 states and 2230 transitions. [2023-08-31 22:08:29,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 125 transitions, 625 flow [2023-08-31 22:08:29,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 125 transitions, 613 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:29,350 INFO L231 Difference]: Finished difference. Result has 99 places, 87 transitions, 356 flow [2023-08-31 22:08:29,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=356, PETRI_PLACES=99, PETRI_TRANSITIONS=87} [2023-08-31 22:08:29,351 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -42 predicate places. [2023-08-31 22:08:29,351 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 87 transitions, 356 flow [2023-08-31 22:08:29,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 304.85714285714283) internal successors, (2134), 7 states have internal predecessors, (2134), 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) [2023-08-31 22:08:29,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:29,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:29,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:08:29,353 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:29,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1612714314, now seen corresponding path program 2 times [2023-08-31 22:08:29,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:29,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679044963] [2023-08-31 22:08:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:29,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:29,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:29,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679044963] [2023-08-31 22:08:29,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679044963] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:29,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:29,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:08:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112944546] [2023-08-31 22:08:29,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:29,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:08:29,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:08:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:08:30,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 796 [2023-08-31 22:08:30,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 87 transitions, 356 flow. Second operand has 7 states, 7 states have (on average 304.85714285714283) internal successors, (2134), 7 states have internal predecessors, (2134), 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) [2023-08-31 22:08:30,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:30,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 796 [2023-08-31 22:08:30,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:30,829 INFO L130 PetriNetUnfolder]: 1861/3193 cut-off events. [2023-08-31 22:08:30,830 INFO L131 PetriNetUnfolder]: For 473/473 co-relation queries the response was YES. [2023-08-31 22:08:30,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6885 conditions, 3193 events. 1861/3193 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 13912 event pairs, 499 based on Foata normal form. 11/2596 useless extension candidates. Maximal degree in co-relation 6869. Up to 2477 conditions per place. [2023-08-31 22:08:30,842 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 91 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2023-08-31 22:08:30,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 113 transitions, 618 flow [2023-08-31 22:08:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:08:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:08:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1911 transitions. [2023-08-31 22:08:30,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4001256281407035 [2023-08-31 22:08:30,846 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1911 transitions. [2023-08-31 22:08:30,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1911 transitions. [2023-08-31 22:08:30,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:30,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1911 transitions. [2023-08-31 22:08:30,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 318.5) internal successors, (1911), 6 states have internal predecessors, (1911), 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) [2023-08-31 22:08:30,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 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) [2023-08-31 22:08:30,854 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 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) [2023-08-31 22:08:30,854 INFO L175 Difference]: Start difference. First operand has 99 places, 87 transitions, 356 flow. Second operand 6 states and 1911 transitions. [2023-08-31 22:08:30,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 113 transitions, 618 flow [2023-08-31 22:08:30,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 113 transitions, 604 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:30,859 INFO L231 Difference]: Finished difference. Result has 101 places, 85 transitions, 362 flow [2023-08-31 22:08:30,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=101, PETRI_TRANSITIONS=85} [2023-08-31 22:08:30,860 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -40 predicate places. [2023-08-31 22:08:30,860 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 85 transitions, 362 flow [2023-08-31 22:08:30,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 304.85714285714283) internal successors, (2134), 7 states have internal predecessors, (2134), 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) [2023-08-31 22:08:30,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:30,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:30,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:08:30,861 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:30,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:30,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1882925758, now seen corresponding path program 1 times [2023-08-31 22:08:30,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:30,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978905385] [2023-08-31 22:08:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:30,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:31,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:31,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978905385] [2023-08-31 22:08:31,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978905385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:31,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:31,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-31 22:08:31,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602292166] [2023-08-31 22:08:31,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:31,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 22:08:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 22:08:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-31 22:08:32,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 796 [2023-08-31 22:08:32,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 85 transitions, 362 flow. Second operand has 11 states, 11 states have (on average 292.1818181818182) internal successors, (3214), 11 states have internal predecessors, (3214), 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) [2023-08-31 22:08:32,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:32,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 796 [2023-08-31 22:08:32,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:33,531 INFO L130 PetriNetUnfolder]: 1860/3208 cut-off events. [2023-08-31 22:08:33,531 INFO L131 PetriNetUnfolder]: For 953/953 co-relation queries the response was YES. [2023-08-31 22:08:33,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6939 conditions, 3208 events. 1860/3208 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14076 event pairs, 1450 based on Foata normal form. 0/2597 useless extension candidates. Maximal degree in co-relation 6923. Up to 3005 conditions per place. [2023-08-31 22:08:33,573 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 77 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2023-08-31 22:08:33,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 104 transitions, 606 flow [2023-08-31 22:08:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:08:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:08:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2999 transitions. [2023-08-31 22:08:33,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37675879396984924 [2023-08-31 22:08:33,577 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2999 transitions. [2023-08-31 22:08:33,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2999 transitions. [2023-08-31 22:08:33,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:33,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2999 transitions. [2023-08-31 22:08:33,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 299.9) internal successors, (2999), 10 states have internal predecessors, (2999), 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) [2023-08-31 22:08:33,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 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) [2023-08-31 22:08:33,590 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 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) [2023-08-31 22:08:33,590 INFO L175 Difference]: Start difference. First operand has 101 places, 85 transitions, 362 flow. Second operand 10 states and 2999 transitions. [2023-08-31 22:08:33,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 104 transitions, 606 flow [2023-08-31 22:08:33,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 104 transitions, 578 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-31 22:08:33,594 INFO L231 Difference]: Finished difference. Result has 109 places, 94 transitions, 432 flow [2023-08-31 22:08:33,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=432, PETRI_PLACES=109, PETRI_TRANSITIONS=94} [2023-08-31 22:08:33,595 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -32 predicate places. [2023-08-31 22:08:33,595 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 94 transitions, 432 flow [2023-08-31 22:08:33,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 292.1818181818182) internal successors, (3214), 11 states have internal predecessors, (3214), 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) [2023-08-31 22:08:33,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:33,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:33,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 22:08:33,597 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:33,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash 977727891, now seen corresponding path program 1 times [2023-08-31 22:08:33,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:33,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554376174] [2023-08-31 22:08:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:33,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:34,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:34,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554376174] [2023-08-31 22:08:34,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554376174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:34,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:34,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 22:08:34,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163590026] [2023-08-31 22:08:34,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:34,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:08:34,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:34,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:08:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:08:36,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 796 [2023-08-31 22:08:36,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 94 transitions, 432 flow. Second operand has 12 states, 12 states have (on average 286.1666666666667) internal successors, (3434), 12 states have internal predecessors, (3434), 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) [2023-08-31 22:08:36,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:36,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 796 [2023-08-31 22:08:36,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:37,702 INFO L130 PetriNetUnfolder]: 2057/3538 cut-off events. [2023-08-31 22:08:37,702 INFO L131 PetriNetUnfolder]: For 540/540 co-relation queries the response was YES. [2023-08-31 22:08:37,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7770 conditions, 3538 events. 2057/3538 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 16001 event pairs, 562 based on Foata normal form. 0/2874 useless extension candidates. Maximal degree in co-relation 7750. Up to 2441 conditions per place. [2023-08-31 22:08:37,716 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 131 selfloop transitions, 27 changer transitions 0/166 dead transitions. [2023-08-31 22:08:37,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 166 transitions, 912 flow [2023-08-31 22:08:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:08:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:08:37,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2991 transitions. [2023-08-31 22:08:37,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757537688442211 [2023-08-31 22:08:37,720 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2991 transitions. [2023-08-31 22:08:37,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2991 transitions. [2023-08-31 22:08:37,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:37,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2991 transitions. [2023-08-31 22:08:37,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 299.1) internal successors, (2991), 10 states have internal predecessors, (2991), 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) [2023-08-31 22:08:37,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 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) [2023-08-31 22:08:37,729 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 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) [2023-08-31 22:08:37,729 INFO L175 Difference]: Start difference. First operand has 109 places, 94 transitions, 432 flow. Second operand 10 states and 2991 transitions. [2023-08-31 22:08:37,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 166 transitions, 912 flow [2023-08-31 22:08:37,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 166 transitions, 882 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-31 22:08:37,735 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 504 flow [2023-08-31 22:08:37,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=504, PETRI_PLACES=116, PETRI_TRANSITIONS=98} [2023-08-31 22:08:37,735 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -25 predicate places. [2023-08-31 22:08:37,736 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 504 flow [2023-08-31 22:08:37,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 286.1666666666667) internal successors, (3434), 12 states have internal predecessors, (3434), 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) [2023-08-31 22:08:37,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:37,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:37,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 22:08:37,737 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:37,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:37,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1758776753, now seen corresponding path program 2 times [2023-08-31 22:08:37,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:37,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756203199] [2023-08-31 22:08:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:37,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:38,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756203199] [2023-08-31 22:08:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756203199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:38,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:38,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 22:08:38,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471999844] [2023-08-31 22:08:38,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 22:08:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 22:08:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-31 22:08:41,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 796 [2023-08-31 22:08:41,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 98 transitions, 504 flow. Second operand has 12 states, 12 states have (on average 288.1666666666667) internal successors, (3458), 12 states have internal predecessors, (3458), 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) [2023-08-31 22:08:41,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:41,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 796 [2023-08-31 22:08:41,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:41,887 INFO L130 PetriNetUnfolder]: 2121/3662 cut-off events. [2023-08-31 22:08:41,887 INFO L131 PetriNetUnfolder]: For 882/882 co-relation queries the response was YES. [2023-08-31 22:08:41,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8316 conditions, 3662 events. 2121/3662 cut-off events. For 882/882 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 16910 event pairs, 544 based on Foata normal form. 0/2977 useless extension candidates. Maximal degree in co-relation 8293. Up to 2227 conditions per place. [2023-08-31 22:08:41,902 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 128 selfloop transitions, 29 changer transitions 0/164 dead transitions. [2023-08-31 22:08:41,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 164 transitions, 961 flow [2023-08-31 22:08:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:08:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:08:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3006 transitions. [2023-08-31 22:08:41,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37763819095477386 [2023-08-31 22:08:41,905 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3006 transitions. [2023-08-31 22:08:41,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3006 transitions. [2023-08-31 22:08:41,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:41,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3006 transitions. [2023-08-31 22:08:41,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 300.6) internal successors, (3006), 10 states have internal predecessors, (3006), 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) [2023-08-31 22:08:41,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 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) [2023-08-31 22:08:41,913 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 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) [2023-08-31 22:08:41,913 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 504 flow. Second operand 10 states and 3006 transitions. [2023-08-31 22:08:41,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 164 transitions, 961 flow [2023-08-31 22:08:41,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 164 transitions, 918 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-31 22:08:41,921 INFO L231 Difference]: Finished difference. Result has 118 places, 98 transitions, 537 flow [2023-08-31 22:08:41,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=537, PETRI_PLACES=118, PETRI_TRANSITIONS=98} [2023-08-31 22:08:41,922 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -23 predicate places. [2023-08-31 22:08:41,922 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 537 flow [2023-08-31 22:08:41,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 288.1666666666667) internal successors, (3458), 12 states have internal predecessors, (3458), 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) [2023-08-31 22:08:41,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:41,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:41,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 22:08:41,923 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:41,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1993547270, now seen corresponding path program 1 times [2023-08-31 22:08:41,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:41,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819242750] [2023-08-31 22:08:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:41,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:42,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:42,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819242750] [2023-08-31 22:08:42,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819242750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:42,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:42,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 22:08:42,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650652785] [2023-08-31 22:08:42,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:42,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 22:08:42,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:42,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 22:08:42,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-31 22:08:44,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-31 22:08:44,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 98 transitions, 537 flow. Second operand has 13 states, 13 states have (on average 275.3076923076923) internal successors, (3579), 13 states have internal predecessors, (3579), 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) [2023-08-31 22:08:44,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:44,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-31 22:08:44,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:45,562 INFO L130 PetriNetUnfolder]: 2317/4021 cut-off events. [2023-08-31 22:08:45,562 INFO L131 PetriNetUnfolder]: For 1444/1444 co-relation queries the response was YES. [2023-08-31 22:08:45,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9357 conditions, 4021 events. 2317/4021 cut-off events. For 1444/1444 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 19143 event pairs, 1655 based on Foata normal form. 0/3287 useless extension candidates. Maximal degree in co-relation 9333. Up to 3458 conditions per place. [2023-08-31 22:08:45,577 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 121 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2023-08-31 22:08:45,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 153 transitions, 1001 flow [2023-08-31 22:08:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 22:08:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 22:08:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3416 transitions. [2023-08-31 22:08:45,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3576214405360134 [2023-08-31 22:08:45,580 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3416 transitions. [2023-08-31 22:08:45,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3416 transitions. [2023-08-31 22:08:45,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:45,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3416 transitions. [2023-08-31 22:08:45,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 284.6666666666667) internal successors, (3416), 12 states have internal predecessors, (3416), 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) [2023-08-31 22:08:45,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 796.0) internal successors, (10348), 13 states have internal predecessors, (10348), 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) [2023-08-31 22:08:45,592 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 796.0) internal successors, (10348), 13 states have internal predecessors, (10348), 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) [2023-08-31 22:08:45,592 INFO L175 Difference]: Start difference. First operand has 118 places, 98 transitions, 537 flow. Second operand 12 states and 3416 transitions. [2023-08-31 22:08:45,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 153 transitions, 1001 flow [2023-08-31 22:08:45,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 153 transitions, 949 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 22:08:45,601 INFO L231 Difference]: Finished difference. Result has 126 places, 105 transitions, 626 flow [2023-08-31 22:08:45,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=626, PETRI_PLACES=126, PETRI_TRANSITIONS=105} [2023-08-31 22:08:45,602 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -15 predicate places. [2023-08-31 22:08:45,602 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 105 transitions, 626 flow [2023-08-31 22:08:45,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 275.3076923076923) internal successors, (3579), 13 states have internal predecessors, (3579), 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) [2023-08-31 22:08:45,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:45,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:45,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 22:08:45,603 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:45,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1001777143, now seen corresponding path program 1 times [2023-08-31 22:08:45,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:45,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660692074] [2023-08-31 22:08:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:08:46,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:46,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660692074] [2023-08-31 22:08:46,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660692074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:46,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:46,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-31 22:08:46,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647546259] [2023-08-31 22:08:46,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:46,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:08:46,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:46,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:08:46,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:09:02,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-31 22:09:02,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 105 transitions, 626 flow. Second operand has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 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) [2023-08-31 22:09:02,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:02,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-31 22:09:02,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:07,393 INFO L130 PetriNetUnfolder]: 2578/4460 cut-off events. [2023-08-31 22:09:07,394 INFO L131 PetriNetUnfolder]: For 1443/1443 co-relation queries the response was YES. [2023-08-31 22:09:07,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10655 conditions, 4460 events. 2578/4460 cut-off events. For 1443/1443 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 21800 event pairs, 912 based on Foata normal form. 11/3858 useless extension candidates. Maximal degree in co-relation 10626. Up to 3034 conditions per place. [2023-08-31 22:09:07,417 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 155 selfloop transitions, 40 changer transitions 0/202 dead transitions. [2023-08-31 22:09:07,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 1275 flow [2023-08-31 22:09:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 22:09:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 22:09:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3730 transitions. [2023-08-31 22:09:07,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604561267877851 [2023-08-31 22:09:07,422 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3730 transitions. [2023-08-31 22:09:07,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3730 transitions. [2023-08-31 22:09:07,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:07,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3730 transitions. [2023-08-31 22:09:07,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 286.9230769230769) internal successors, (3730), 13 states have internal predecessors, (3730), 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) [2023-08-31 22:09:07,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 796.0) internal successors, (11144), 14 states have internal predecessors, (11144), 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) [2023-08-31 22:09:07,434 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 796.0) internal successors, (11144), 14 states have internal predecessors, (11144), 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) [2023-08-31 22:09:07,435 INFO L175 Difference]: Start difference. First operand has 126 places, 105 transitions, 626 flow. Second operand 13 states and 3730 transitions. [2023-08-31 22:09:07,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 1275 flow [2023-08-31 22:09:07,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 202 transitions, 1240 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-31 22:09:07,449 INFO L231 Difference]: Finished difference. Result has 139 places, 112 transitions, 794 flow [2023-08-31 22:09:07,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=794, PETRI_PLACES=139, PETRI_TRANSITIONS=112} [2023-08-31 22:09:07,449 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -2 predicate places. [2023-08-31 22:09:07,450 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 112 transitions, 794 flow [2023-08-31 22:09:07,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 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) [2023-08-31 22:09:07,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:07,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:07,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 22:09:07,451 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:07,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1617294419, now seen corresponding path program 2 times [2023-08-31 22:09:07,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:07,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483883290] [2023-08-31 22:09:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:07,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:09:08,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:08,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483883290] [2023-08-31 22:09:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483883290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:08,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:08,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-31 22:09:08,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280033591] [2023-08-31 22:09:08,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:08,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:09:08,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:08,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:09:08,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:09:10,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 796 [2023-08-31 22:09:10,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 112 transitions, 794 flow. Second operand has 14 states, 14 states have (on average 273.2857142857143) internal successors, (3826), 14 states have internal predecessors, (3826), 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) [2023-08-31 22:09:10,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:10,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 796 [2023-08-31 22:09:10,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:11,998 INFO L130 PetriNetUnfolder]: 2562/4435 cut-off events. [2023-08-31 22:09:11,999 INFO L131 PetriNetUnfolder]: For 2762/2762 co-relation queries the response was YES. [2023-08-31 22:09:12,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11233 conditions, 4435 events. 2562/4435 cut-off events. For 2762/2762 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 21667 event pairs, 700 based on Foata normal form. 11/3835 useless extension candidates. Maximal degree in co-relation 11197. Up to 2576 conditions per place. [2023-08-31 22:09:12,026 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 139 selfloop transitions, 40 changer transitions 0/186 dead transitions. [2023-08-31 22:09:12,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 1318 flow [2023-08-31 22:09:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 22:09:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 22:09:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3139 transitions. [2023-08-31 22:09:12,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35849703060758337 [2023-08-31 22:09:12,031 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3139 transitions. [2023-08-31 22:09:12,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3139 transitions. [2023-08-31 22:09:12,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:12,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3139 transitions. [2023-08-31 22:09:12,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 285.3636363636364) internal successors, (3139), 11 states have internal predecessors, (3139), 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) [2023-08-31 22:09:12,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 796.0) internal successors, (9552), 12 states have internal predecessors, (9552), 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) [2023-08-31 22:09:12,088 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 796.0) internal successors, (9552), 12 states have internal predecessors, (9552), 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) [2023-08-31 22:09:12,088 INFO L175 Difference]: Start difference. First operand has 139 places, 112 transitions, 794 flow. Second operand 11 states and 3139 transitions. [2023-08-31 22:09:12,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 1318 flow [2023-08-31 22:09:12,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 1272 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-31 22:09:12,108 INFO L231 Difference]: Finished difference. Result has 146 places, 113 transitions, 855 flow [2023-08-31 22:09:12,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=855, PETRI_PLACES=146, PETRI_TRANSITIONS=113} [2023-08-31 22:09:12,109 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 5 predicate places. [2023-08-31 22:09:12,109 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 113 transitions, 855 flow [2023-08-31 22:09:12,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 273.2857142857143) internal successors, (3826), 14 states have internal predecessors, (3826), 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) [2023-08-31 22:09:12,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:12,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:12,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-31 22:09:12,110 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:12,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash 518044755, now seen corresponding path program 3 times [2023-08-31 22:09:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:12,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720707765] [2023-08-31 22:09:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:09:12,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:12,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720707765] [2023-08-31 22:09:12,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720707765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:12,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:12,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-31 22:09:12,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806919561] [2023-08-31 22:09:12,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:12,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:09:12,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:12,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:09:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:09:15,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-31 22:09:15,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 113 transitions, 855 flow. Second operand has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 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) [2023-08-31 22:09:15,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:15,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-31 22:09:15,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:16,318 INFO L130 PetriNetUnfolder]: 2593/4487 cut-off events. [2023-08-31 22:09:16,318 INFO L131 PetriNetUnfolder]: For 3344/3344 co-relation queries the response was YES. [2023-08-31 22:09:16,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11618 conditions, 4487 events. 2593/4487 cut-off events. For 3344/3344 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 22023 event pairs, 586 based on Foata normal form. 11/3883 useless extension candidates. Maximal degree in co-relation 11580. Up to 2258 conditions per place. [2023-08-31 22:09:16,345 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 145 selfloop transitions, 43 changer transitions 0/195 dead transitions. [2023-08-31 22:09:16,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 195 transitions, 1419 flow [2023-08-31 22:09:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 22:09:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 22:09:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3716 transitions. [2023-08-31 22:09:16,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3591032083494395 [2023-08-31 22:09:16,349 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3716 transitions. [2023-08-31 22:09:16,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3716 transitions. [2023-08-31 22:09:16,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:16,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3716 transitions. [2023-08-31 22:09:16,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 285.84615384615387) internal successors, (3716), 13 states have internal predecessors, (3716), 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) [2023-08-31 22:09:16,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 796.0) internal successors, (11144), 14 states have internal predecessors, (11144), 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) [2023-08-31 22:09:16,361 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 796.0) internal successors, (11144), 14 states have internal predecessors, (11144), 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) [2023-08-31 22:09:16,362 INFO L175 Difference]: Start difference. First operand has 146 places, 113 transitions, 855 flow. Second operand 13 states and 3716 transitions. [2023-08-31 22:09:16,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 195 transitions, 1419 flow [2023-08-31 22:09:16,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 195 transitions, 1340 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-31 22:09:16,381 INFO L231 Difference]: Finished difference. Result has 152 places, 115 transitions, 902 flow [2023-08-31 22:09:16,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=902, PETRI_PLACES=152, PETRI_TRANSITIONS=115} [2023-08-31 22:09:16,382 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 11 predicate places. [2023-08-31 22:09:16,382 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 115 transitions, 902 flow [2023-08-31 22:09:16,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 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) [2023-08-31 22:09:16,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:16,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:16,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-31 22:09:16,383 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:16,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:16,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1670417789, now seen corresponding path program 4 times [2023-08-31 22:09:16,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:16,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834175604] [2023-08-31 22:09:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:16,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:09:17,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:17,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834175604] [2023-08-31 22:09:17,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834175604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:17,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:17,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-31 22:09:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131725446] [2023-08-31 22:09:17,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:17,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:09:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:17,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:09:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:09:28,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-31 22:09:28,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 115 transitions, 902 flow. Second operand has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 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) [2023-08-31 22:09:28,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:28,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-31 22:09:28,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:31,407 INFO L130 PetriNetUnfolder]: 2577/4474 cut-off events. [2023-08-31 22:09:31,407 INFO L131 PetriNetUnfolder]: For 4020/4020 co-relation queries the response was YES. [2023-08-31 22:09:31,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11739 conditions, 4474 events. 2577/4474 cut-off events. For 4020/4020 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 22013 event pairs, 685 based on Foata normal form. 11/3870 useless extension candidates. Maximal degree in co-relation 11699. Up to 2262 conditions per place. [2023-08-31 22:09:31,435 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 141 selfloop transitions, 45 changer transitions 0/193 dead transitions. [2023-08-31 22:09:31,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 193 transitions, 1442 flow [2023-08-31 22:09:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-31 22:09:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-31 22:09:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3439 transitions. [2023-08-31 22:09:31,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3600293132328308 [2023-08-31 22:09:31,438 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3439 transitions. [2023-08-31 22:09:31,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3439 transitions. [2023-08-31 22:09:31,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:31,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3439 transitions. [2023-08-31 22:09:31,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 286.5833333333333) internal successors, (3439), 12 states have internal predecessors, (3439), 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) [2023-08-31 22:09:31,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 796.0) internal successors, (10348), 13 states have internal predecessors, (10348), 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) [2023-08-31 22:09:31,449 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 796.0) internal successors, (10348), 13 states have internal predecessors, (10348), 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) [2023-08-31 22:09:31,450 INFO L175 Difference]: Start difference. First operand has 152 places, 115 transitions, 902 flow. Second operand 12 states and 3439 transitions. [2023-08-31 22:09:31,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 193 transitions, 1442 flow [2023-08-31 22:09:31,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 193 transitions, 1347 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-31 22:09:31,472 INFO L231 Difference]: Finished difference. Result has 153 places, 115 transitions, 909 flow [2023-08-31 22:09:31,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=909, PETRI_PLACES=153, PETRI_TRANSITIONS=115} [2023-08-31 22:09:31,473 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 12 predicate places. [2023-08-31 22:09:31,473 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 115 transitions, 909 flow [2023-08-31 22:09:31,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 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) [2023-08-31 22:09:31,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:31,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:31,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-31 22:09:31,474 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:31,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:31,475 INFO L85 PathProgramCache]: Analyzing trace with hash -816584116, now seen corresponding path program 1 times [2023-08-31 22:09:31,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:31,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101175541] [2023-08-31 22:09:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:31,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:09:31,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:31,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101175541] [2023-08-31 22:09:31,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101175541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:31,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:31,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:09:31,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363720896] [2023-08-31 22:09:31,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:31,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:09:31,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:31,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:09:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:09:31,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 796 [2023-08-31 22:09:31,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 115 transitions, 909 flow. Second operand has 4 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 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) [2023-08-31 22:09:31,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:31,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 796 [2023-08-31 22:09:31,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:32,333 INFO L130 PetriNetUnfolder]: 3075/5387 cut-off events. [2023-08-31 22:09:32,333 INFO L131 PetriNetUnfolder]: For 6047/6081 co-relation queries the response was YES. [2023-08-31 22:09:32,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13994 conditions, 5387 events. 3075/5387 cut-off events. For 6047/6081 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 28537 event pairs, 1496 based on Foata normal form. 34/4731 useless extension candidates. Maximal degree in co-relation 13955. Up to 4087 conditions per place. [2023-08-31 22:09:32,367 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 136 selfloop transitions, 3 changer transitions 0/157 dead transitions. [2023-08-31 22:09:32,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 157 transitions, 1356 flow [2023-08-31 22:09:32,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:09:32,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:09:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1392 transitions. [2023-08-31 22:09:32,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371859296482412 [2023-08-31 22:09:32,369 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1392 transitions. [2023-08-31 22:09:32,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1392 transitions. [2023-08-31 22:09:32,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:32,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1392 transitions. [2023-08-31 22:09:32,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 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) [2023-08-31 22:09:32,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 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) [2023-08-31 22:09:32,373 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 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) [2023-08-31 22:09:32,373 INFO L175 Difference]: Start difference. First operand has 153 places, 115 transitions, 909 flow. Second operand 4 states and 1392 transitions. [2023-08-31 22:09:32,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 157 transitions, 1356 flow [2023-08-31 22:09:32,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 157 transitions, 1269 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-31 22:09:32,398 INFO L231 Difference]: Finished difference. Result has 147 places, 116 transitions, 843 flow [2023-08-31 22:09:32,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=843, PETRI_PLACES=147, PETRI_TRANSITIONS=116} [2023-08-31 22:09:32,399 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 6 predicate places. [2023-08-31 22:09:32,399 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 116 transitions, 843 flow [2023-08-31 22:09:32,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 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) [2023-08-31 22:09:32,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:32,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:32,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-31 22:09:32,400 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:32,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1801802691, now seen corresponding path program 1 times [2023-08-31 22:09:32,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:32,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060999531] [2023-08-31 22:09:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:32,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:09:32,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:32,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060999531] [2023-08-31 22:09:32,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060999531] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:32,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:32,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:09:32,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796383387] [2023-08-31 22:09:32,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:32,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:09:32,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:09:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:09:32,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 796 [2023-08-31 22:09:32,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 116 transitions, 843 flow. Second operand has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 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) [2023-08-31 22:09:32,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:32,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 796 [2023-08-31 22:09:32,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:32,800 INFO L130 PetriNetUnfolder]: 2123/3787 cut-off events. [2023-08-31 22:09:32,800 INFO L131 PetriNetUnfolder]: For 4523/4557 co-relation queries the response was YES. [2023-08-31 22:09:32,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10060 conditions, 3787 events. 2123/3787 cut-off events. For 4523/4557 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 18886 event pairs, 1085 based on Foata normal form. 131/3581 useless extension candidates. Maximal degree in co-relation 10021. Up to 2061 conditions per place. [2023-08-31 22:09:32,825 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 114 selfloop transitions, 3 changer transitions 1/133 dead transitions. [2023-08-31 22:09:32,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 133 transitions, 1136 flow [2023-08-31 22:09:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:09:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:09:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2023-08-31 22:09:32,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426298157453936 [2023-08-31 22:09:32,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2023-08-31 22:09:32,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2023-08-31 22:09:32,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:32,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2023-08-31 22:09:32,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 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) [2023-08-31 22:09:32,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:09:32,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:09:32,830 INFO L175 Difference]: Start difference. First operand has 147 places, 116 transitions, 843 flow. Second operand 3 states and 1057 transitions. [2023-08-31 22:09:32,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 133 transitions, 1136 flow [2023-08-31 22:09:32,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 133 transitions, 1128 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:09:32,844 INFO L231 Difference]: Finished difference. Result has 148 places, 115 transitions, 856 flow [2023-08-31 22:09:32,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=856, PETRI_PLACES=148, PETRI_TRANSITIONS=115} [2023-08-31 22:09:32,845 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 7 predicate places. [2023-08-31 22:09:32,845 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 115 transitions, 856 flow [2023-08-31 22:09:32,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 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) [2023-08-31 22:09:32,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:32,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:32,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-31 22:09:32,846 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:32,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1071183114, now seen corresponding path program 1 times [2023-08-31 22:09:32,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:32,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490739740] [2023-08-31 22:09:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:09:32,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:32,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490739740] [2023-08-31 22:09:32,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490739740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:32,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:32,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:09:32,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204789910] [2023-08-31 22:09:32,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:32,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:09:32,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:09:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:09:32,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 796 [2023-08-31 22:09:32,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 115 transitions, 856 flow. Second operand has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 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) [2023-08-31 22:09:32,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:32,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 796 [2023-08-31 22:09:32,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:33,644 INFO L130 PetriNetUnfolder]: 3219/5893 cut-off events. [2023-08-31 22:09:33,644 INFO L131 PetriNetUnfolder]: For 7428/7506 co-relation queries the response was YES. [2023-08-31 22:09:33,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15456 conditions, 5893 events. 3219/5893 cut-off events. For 7428/7506 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 34669 event pairs, 1547 based on Foata normal form. 76/5587 useless extension candidates. Maximal degree in co-relation 15416. Up to 3462 conditions per place. [2023-08-31 22:09:33,710 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 166 selfloop transitions, 2 changer transitions 0/185 dead transitions. [2023-08-31 22:09:33,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 185 transitions, 1623 flow [2023-08-31 22:09:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:09:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:09:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1092 transitions. [2023-08-31 22:09:33,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457286432160804 [2023-08-31 22:09:33,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1092 transitions. [2023-08-31 22:09:33,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1092 transitions. [2023-08-31 22:09:33,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:33,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1092 transitions. [2023-08-31 22:09:33,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.0) internal successors, (1092), 3 states have internal predecessors, (1092), 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) [2023-08-31 22:09:33,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:09:33,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:09:33,716 INFO L175 Difference]: Start difference. First operand has 148 places, 115 transitions, 856 flow. Second operand 3 states and 1092 transitions. [2023-08-31 22:09:33,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 185 transitions, 1623 flow [2023-08-31 22:09:33,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 185 transitions, 1615 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:09:33,742 INFO L231 Difference]: Finished difference. Result has 148 places, 116 transitions, 862 flow [2023-08-31 22:09:33,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=862, PETRI_PLACES=148, PETRI_TRANSITIONS=116} [2023-08-31 22:09:33,743 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 7 predicate places. [2023-08-31 22:09:33,743 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 116 transitions, 862 flow [2023-08-31 22:09:33,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 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) [2023-08-31 22:09:33,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:33,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:33,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-31 22:09:33,744 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:33,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:33,744 INFO L85 PathProgramCache]: Analyzing trace with hash -139855902, now seen corresponding path program 1 times [2023-08-31 22:09:33,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:33,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601795005] [2023-08-31 22:09:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:33,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:09:33,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:33,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601795005] [2023-08-31 22:09:33,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601795005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:33,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:33,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:09:33,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554325259] [2023-08-31 22:09:33,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:33,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:09:33,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:33,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:09:33,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:09:33,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 796 [2023-08-31 22:09:33,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 116 transitions, 862 flow. Second operand has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 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) [2023-08-31 22:09:33,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:33,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 796 [2023-08-31 22:09:33,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:34,376 INFO L130 PetriNetUnfolder]: 2356/4348 cut-off events. [2023-08-31 22:09:34,377 INFO L131 PetriNetUnfolder]: For 4930/4935 co-relation queries the response was YES. [2023-08-31 22:09:34,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12388 conditions, 4348 events. 2356/4348 cut-off events. For 4930/4935 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 22895 event pairs, 635 based on Foata normal form. 407/4630 useless extension candidates. Maximal degree in co-relation 12347. Up to 3026 conditions per place. [2023-08-31 22:09:34,420 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 107 selfloop transitions, 7 changer transitions 0/129 dead transitions. [2023-08-31 22:09:34,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 129 transitions, 1146 flow [2023-08-31 22:09:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:09:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:09:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2023-08-31 22:09:34,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380234505862647 [2023-08-31 22:09:34,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2023-08-31 22:09:34,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2023-08-31 22:09:34,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:34,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2023-08-31 22:09:34,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 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) [2023-08-31 22:09:34,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:09:34,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 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) [2023-08-31 22:09:34,426 INFO L175 Difference]: Start difference. First operand has 148 places, 116 transitions, 862 flow. Second operand 3 states and 1046 transitions. [2023-08-31 22:09:34,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 129 transitions, 1146 flow [2023-08-31 22:09:34,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 129 transitions, 1142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:09:34,446 INFO L231 Difference]: Finished difference. Result has 149 places, 116 transitions, 874 flow [2023-08-31 22:09:34,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=874, PETRI_PLACES=149, PETRI_TRANSITIONS=116} [2023-08-31 22:09:34,447 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 8 predicate places. [2023-08-31 22:09:34,448 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 116 transitions, 874 flow [2023-08-31 22:09:34,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 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) [2023-08-31 22:09:34,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:34,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:34,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-31 22:09:34,449 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:34,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:34,449 INFO L85 PathProgramCache]: Analyzing trace with hash 229051555, now seen corresponding path program 1 times [2023-08-31 22:09:34,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:34,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774697209] [2023-08-31 22:09:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:34,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:09:34,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:34,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774697209] [2023-08-31 22:09:34,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774697209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:09:34,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865601540] [2023-08-31 22:09:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:34,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:09:34,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:09:34,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 22:09:34,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 22:09:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:34,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:09:34,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:09:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:09:34,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:09:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 22:09:34,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865601540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:09:34,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:09:34,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-31 22:09:34,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763049229] [2023-08-31 22:09:34,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:09:34,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:09:34,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:34,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:09:34,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:09:34,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-31 22:09:34,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 116 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 333.7142857142857) internal successors, (2336), 7 states have internal predecessors, (2336), 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) [2023-08-31 22:09:34,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:34,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-31 22:09:34,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:35,920 INFO L130 PetriNetUnfolder]: 3674/7206 cut-off events. [2023-08-31 22:09:35,921 INFO L131 PetriNetUnfolder]: For 8832/8888 co-relation queries the response was YES. [2023-08-31 22:09:35,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20185 conditions, 7206 events. 3674/7206 cut-off events. For 8832/8888 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 45890 event pairs, 523 based on Foata normal form. 614/7576 useless extension candidates. Maximal degree in co-relation 20144. Up to 1382 conditions per place. [2023-08-31 22:09:36,014 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 306 selfloop transitions, 6 changer transitions 0/329 dead transitions. [2023-08-31 22:09:36,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 329 transitions, 2744 flow [2023-08-31 22:09:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:09:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:09:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2201 transitions. [2023-08-31 22:09:36,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608458961474037 [2023-08-31 22:09:36,018 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2201 transitions. [2023-08-31 22:09:36,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2201 transitions. [2023-08-31 22:09:36,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:36,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2201 transitions. [2023-08-31 22:09:36,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 366.8333333333333) internal successors, (2201), 6 states have internal predecessors, (2201), 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) [2023-08-31 22:09:36,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 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) [2023-08-31 22:09:36,029 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 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) [2023-08-31 22:09:36,029 INFO L175 Difference]: Start difference. First operand has 149 places, 116 transitions, 874 flow. Second operand 6 states and 2201 transitions. [2023-08-31 22:09:36,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 329 transitions, 2744 flow [2023-08-31 22:09:36,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 329 transitions, 2721 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:09:36,055 INFO L231 Difference]: Finished difference. Result has 157 places, 119 transitions, 908 flow [2023-08-31 22:09:36,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=908, PETRI_PLACES=157, PETRI_TRANSITIONS=119} [2023-08-31 22:09:36,055 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 16 predicate places. [2023-08-31 22:09:36,055 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 119 transitions, 908 flow [2023-08-31 22:09:36,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 333.7142857142857) internal successors, (2336), 7 states have internal predecessors, (2336), 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) [2023-08-31 22:09:36,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:36,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:36,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 22:09:36,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-31 22:09:36,263 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:36,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:36,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1443675116, now seen corresponding path program 1 times [2023-08-31 22:09:36,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:36,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462143018] [2023-08-31 22:09:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:36,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:09:38,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:38,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462143018] [2023-08-31 22:09:38,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462143018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:38,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:38,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-31 22:09:38,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270790584] [2023-08-31 22:09:38,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:38,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 22:09:38,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 22:09:38,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-31 22:09:45,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 796 [2023-08-31 22:09:45,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 119 transitions, 908 flow. Second operand has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 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) [2023-08-31 22:09:45,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:45,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 796 [2023-08-31 22:09:45,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:48,086 INFO L130 PetriNetUnfolder]: 4044/7752 cut-off events. [2023-08-31 22:09:48,086 INFO L131 PetriNetUnfolder]: For 14631/14631 co-relation queries the response was YES. [2023-08-31 22:09:48,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24144 conditions, 7752 events. 4044/7752 cut-off events. For 14631/14631 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 47771 event pairs, 2369 based on Foata normal form. 0/7511 useless extension candidates. Maximal degree in co-relation 24099. Up to 4822 conditions per place. [2023-08-31 22:09:48,149 INFO L137 encePairwiseOnDemand]: 778/796 looper letters, 206 selfloop transitions, 50 changer transitions 0/262 dead transitions. [2023-08-31 22:09:48,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 262 transitions, 2275 flow [2023-08-31 22:09:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 22:09:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 22:09:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5004 transitions. [2023-08-31 22:09:48,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697901271061188 [2023-08-31 22:09:48,153 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5004 transitions. [2023-08-31 22:09:48,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5004 transitions. [2023-08-31 22:09:48,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:48,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5004 transitions. [2023-08-31 22:09:48,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 294.3529411764706) internal successors, (5004), 17 states have internal predecessors, (5004), 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) [2023-08-31 22:09:48,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 796.0) internal successors, (14328), 18 states have internal predecessors, (14328), 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) [2023-08-31 22:09:48,165 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 796.0) internal successors, (14328), 18 states have internal predecessors, (14328), 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) [2023-08-31 22:09:48,165 INFO L175 Difference]: Start difference. First operand has 157 places, 119 transitions, 908 flow. Second operand 17 states and 5004 transitions. [2023-08-31 22:09:48,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 262 transitions, 2275 flow [2023-08-31 22:09:48,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 262 transitions, 2161 flow, removed 42 selfloop flow, removed 1 redundant places. [2023-08-31 22:09:48,202 INFO L231 Difference]: Finished difference. Result has 177 places, 132 transitions, 1102 flow [2023-08-31 22:09:48,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1102, PETRI_PLACES=177, PETRI_TRANSITIONS=132} [2023-08-31 22:09:48,202 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 36 predicate places. [2023-08-31 22:09:48,203 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 132 transitions, 1102 flow [2023-08-31 22:09:48,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 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) [2023-08-31 22:09:48,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:48,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:48,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-31 22:09:48,204 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:48,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash 168132684, now seen corresponding path program 2 times [2023-08-31 22:09:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:48,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293645884] [2023-08-31 22:09:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:48,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:09:49,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:49,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293645884] [2023-08-31 22:09:49,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293645884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:49,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:49,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-31 22:09:49,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613135909] [2023-08-31 22:09:49,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:49,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 22:09:49,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:49,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 22:09:49,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-31 22:09:51,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 796 [2023-08-31 22:09:51,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 132 transitions, 1102 flow. Second operand has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 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) [2023-08-31 22:09:51,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:51,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 796 [2023-08-31 22:09:51,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:53,377 INFO L130 PetriNetUnfolder]: 4130/7939 cut-off events. [2023-08-31 22:09:53,378 INFO L131 PetriNetUnfolder]: For 13855/13855 co-relation queries the response was YES. [2023-08-31 22:09:53,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24918 conditions, 7939 events. 4130/7939 cut-off events. For 13855/13855 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 49210 event pairs, 2153 based on Foata normal form. 23/7762 useless extension candidates. Maximal degree in co-relation 24867. Up to 4018 conditions per place. [2023-08-31 22:09:53,439 INFO L137 encePairwiseOnDemand]: 779/796 looper letters, 194 selfloop transitions, 54 changer transitions 0/254 dead transitions. [2023-08-31 22:09:53,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 254 transitions, 2244 flow [2023-08-31 22:09:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-31 22:09:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-31 22:09:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4419 transitions. [2023-08-31 22:09:53,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701005025125628 [2023-08-31 22:09:53,443 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4419 transitions. [2023-08-31 22:09:53,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4419 transitions. [2023-08-31 22:09:53,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:53,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4419 transitions. [2023-08-31 22:09:53,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 294.6) internal successors, (4419), 15 states have internal predecessors, (4419), 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) [2023-08-31 22:09:53,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 796.0) internal successors, (12736), 16 states have internal predecessors, (12736), 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) [2023-08-31 22:09:53,454 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 796.0) internal successors, (12736), 16 states have internal predecessors, (12736), 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) [2023-08-31 22:09:53,454 INFO L175 Difference]: Start difference. First operand has 177 places, 132 transitions, 1102 flow. Second operand 15 states and 4419 transitions. [2023-08-31 22:09:53,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 254 transitions, 2244 flow [2023-08-31 22:09:53,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 254 transitions, 2174 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-08-31 22:09:53,501 INFO L231 Difference]: Finished difference. Result has 184 places, 137 transitions, 1198 flow [2023-08-31 22:09:53,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1198, PETRI_PLACES=184, PETRI_TRANSITIONS=137} [2023-08-31 22:09:53,502 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 43 predicate places. [2023-08-31 22:09:53,502 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 137 transitions, 1198 flow [2023-08-31 22:09:53,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 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) [2023-08-31 22:09:53,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:53,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:53,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-31 22:09:53,503 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:53,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:53,503 INFO L85 PathProgramCache]: Analyzing trace with hash -838975280, now seen corresponding path program 3 times [2023-08-31 22:09:53,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:53,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613682916] [2023-08-31 22:09:53,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:53,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:09:54,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:54,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613682916] [2023-08-31 22:09:54,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613682916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:54,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:54,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-31 22:09:54,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271899953] [2023-08-31 22:09:54,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:54,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 22:09:54,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:54,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 22:09:54,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-31 22:09:57,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 796 [2023-08-31 22:09:57,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 137 transitions, 1198 flow. Second operand has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 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) [2023-08-31 22:09:57,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:57,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 796 [2023-08-31 22:09:57,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:59,163 INFO L130 PetriNetUnfolder]: 4713/9104 cut-off events. [2023-08-31 22:09:59,163 INFO L131 PetriNetUnfolder]: For 16239/16239 co-relation queries the response was YES. [2023-08-31 22:09:59,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28736 conditions, 9104 events. 4713/9104 cut-off events. For 16239/16239 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 58631 event pairs, 1461 based on Foata normal form. 23/8807 useless extension candidates. Maximal degree in co-relation 28681. Up to 3593 conditions per place. [2023-08-31 22:09:59,212 INFO L137 encePairwiseOnDemand]: 775/796 looper letters, 206 selfloop transitions, 65 changer transitions 0/277 dead transitions. [2023-08-31 22:09:59,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 277 transitions, 2458 flow [2023-08-31 22:09:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 22:09:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 22:09:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5004 transitions. [2023-08-31 22:09:59,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697901271061188 [2023-08-31 22:09:59,217 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5004 transitions. [2023-08-31 22:09:59,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5004 transitions. [2023-08-31 22:09:59,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:59,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5004 transitions. [2023-08-31 22:09:59,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 294.3529411764706) internal successors, (5004), 17 states have internal predecessors, (5004), 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) [2023-08-31 22:09:59,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 796.0) internal successors, (14328), 18 states have internal predecessors, (14328), 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) [2023-08-31 22:09:59,230 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 796.0) internal successors, (14328), 18 states have internal predecessors, (14328), 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) [2023-08-31 22:09:59,231 INFO L175 Difference]: Start difference. First operand has 184 places, 137 transitions, 1198 flow. Second operand 17 states and 5004 transitions. [2023-08-31 22:09:59,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 277 transitions, 2458 flow [2023-08-31 22:09:59,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 277 transitions, 2347 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-31 22:09:59,291 INFO L231 Difference]: Finished difference. Result has 193 places, 146 transitions, 1344 flow [2023-08-31 22:09:59,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1344, PETRI_PLACES=193, PETRI_TRANSITIONS=146} [2023-08-31 22:09:59,292 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 52 predicate places. [2023-08-31 22:09:59,292 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 146 transitions, 1344 flow [2023-08-31 22:09:59,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 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) [2023-08-31 22:09:59,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:59,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:59,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-31 22:09:59,293 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:59,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:59,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1101537724, now seen corresponding path program 4 times [2023-08-31 22:09:59,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:59,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143745248] [2023-08-31 22:09:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:59,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:10:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:10:00,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:10:00,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143745248] [2023-08-31 22:10:00,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143745248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:10:00,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:10:00,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-31 22:10:00,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000239985] [2023-08-31 22:10:00,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:10:00,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 22:10:00,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:10:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 22:10:00,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-31 22:10:02,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 796 [2023-08-31 22:10:02,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 146 transitions, 1344 flow. Second operand has 17 states, 17 states have (on average 281.70588235294116) internal successors, (4789), 17 states have internal predecessors, (4789), 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) [2023-08-31 22:10:02,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:10:02,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 796 [2023-08-31 22:10:02,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:10:04,100 INFO L130 PetriNetUnfolder]: 4092/7965 cut-off events. [2023-08-31 22:10:04,101 INFO L131 PetriNetUnfolder]: For 17762/17762 co-relation queries the response was YES. [2023-08-31 22:10:04,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26794 conditions, 7965 events. 4092/7965 cut-off events. For 17762/17762 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 49798 event pairs, 1162 based on Foata normal form. 10/7815 useless extension candidates. Maximal degree in co-relation 26736. Up to 2947 conditions per place. [2023-08-31 22:10:04,161 INFO L137 encePairwiseOnDemand]: 779/796 looper letters, 195 selfloop transitions, 60 changer transitions 0/261 dead transitions. [2023-08-31 22:10:04,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 261 transitions, 2476 flow [2023-08-31 22:10:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:10:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:10:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4071 transitions. [2023-08-31 22:10:04,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36530868628858576 [2023-08-31 22:10:04,164 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4071 transitions. [2023-08-31 22:10:04,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4071 transitions. [2023-08-31 22:10:04,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:10:04,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4071 transitions. [2023-08-31 22:10:04,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 290.7857142857143) internal successors, (4071), 14 states have internal predecessors, (4071), 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) [2023-08-31 22:10:04,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 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) [2023-08-31 22:10:04,175 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 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) [2023-08-31 22:10:04,175 INFO L175 Difference]: Start difference. First operand has 193 places, 146 transitions, 1344 flow. Second operand 14 states and 4071 transitions. [2023-08-31 22:10:04,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 261 transitions, 2476 flow [2023-08-31 22:10:04,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 261 transitions, 2400 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-08-31 22:10:04,253 INFO L231 Difference]: Finished difference. Result has 199 places, 149 transitions, 1462 flow [2023-08-31 22:10:04,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1462, PETRI_PLACES=199, PETRI_TRANSITIONS=149} [2023-08-31 22:10:04,254 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 58 predicate places. [2023-08-31 22:10:04,254 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 149 transitions, 1462 flow [2023-08-31 22:10:04,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 281.70588235294116) internal successors, (4789), 17 states have internal predecessors, (4789), 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) [2023-08-31 22:10:04,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:10:04,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:10:04,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-31 22:10:04,255 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:10:04,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:10:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash -567327663, now seen corresponding path program 1 times [2023-08-31 22:10:04,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:10:04,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739128178] [2023-08-31 22:10:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:10:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:10:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:10:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:10:06,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:10:06,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739128178] [2023-08-31 22:10:06,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739128178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:10:06,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:10:06,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-08-31 22:10:06,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274861307] [2023-08-31 22:10:06,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:10:06,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 22:10:06,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:10:06,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 22:10:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-08-31 22:10:11,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 796 [2023-08-31 22:10:11,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 149 transitions, 1462 flow. Second operand has 20 states, 20 states have (on average 266.5) internal successors, (5330), 20 states have internal predecessors, (5330), 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) [2023-08-31 22:10:11,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:10:11,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 796 [2023-08-31 22:10:11,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:10:13,669 INFO L130 PetriNetUnfolder]: 4969/9549 cut-off events. [2023-08-31 22:10:13,669 INFO L131 PetriNetUnfolder]: For 25836/25836 co-relation queries the response was YES. [2023-08-31 22:10:13,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32577 conditions, 9549 events. 4969/9549 cut-off events. For 25836/25836 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 61823 event pairs, 2512 based on Foata normal form. 0/9269 useless extension candidates. Maximal degree in co-relation 32515. Up to 6171 conditions per place. [2023-08-31 22:10:13,724 INFO L137 encePairwiseOnDemand]: 779/796 looper letters, 238 selfloop transitions, 45 changer transitions 0/289 dead transitions. [2023-08-31 22:10:13,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 289 transitions, 2816 flow [2023-08-31 22:10:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:10:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:10:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3886 transitions. [2023-08-31 22:10:13,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3487078248384781 [2023-08-31 22:10:13,730 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3886 transitions. [2023-08-31 22:10:13,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3886 transitions. [2023-08-31 22:10:13,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:10:13,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3886 transitions. [2023-08-31 22:10:13,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 277.57142857142856) internal successors, (3886), 14 states have internal predecessors, (3886), 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) [2023-08-31 22:10:13,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 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) [2023-08-31 22:10:13,742 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 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) [2023-08-31 22:10:13,742 INFO L175 Difference]: Start difference. First operand has 199 places, 149 transitions, 1462 flow. Second operand 14 states and 3886 transitions. [2023-08-31 22:10:13,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 289 transitions, 2816 flow [2023-08-31 22:10:13,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 289 transitions, 2719 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-31 22:10:13,839 INFO L231 Difference]: Finished difference. Result has 207 places, 155 transitions, 1564 flow [2023-08-31 22:10:13,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1564, PETRI_PLACES=207, PETRI_TRANSITIONS=155} [2023-08-31 22:10:13,839 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 66 predicate places. [2023-08-31 22:10:13,839 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 155 transitions, 1564 flow [2023-08-31 22:10:13,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 266.5) internal successors, (5330), 20 states have internal predecessors, (5330), 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) [2023-08-31 22:10:13,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:10:13,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:10:13,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-31 22:10:13,841 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:10:13,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:10:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash -557461965, now seen corresponding path program 2 times [2023-08-31 22:10:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:10:13,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659653744] [2023-08-31 22:10:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:10:13,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:10:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:10:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:10:15,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:10:15,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659653744] [2023-08-31 22:10:15,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659653744] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:10:15,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:10:15,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-31 22:10:15,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820064909] [2023-08-31 22:10:15,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:10:15,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 22:10:15,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:10:15,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 22:10:15,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-08-31 22:10:21,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 796 [2023-08-31 22:10:21,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 155 transitions, 1564 flow. Second operand has 18 states, 18 states have (on average 278.6666666666667) internal successors, (5016), 18 states have internal predecessors, (5016), 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) [2023-08-31 22:10:21,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:10:21,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 796 [2023-08-31 22:10:21,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:10:23,843 INFO L130 PetriNetUnfolder]: 5523/10649 cut-off events. [2023-08-31 22:10:23,843 INFO L131 PetriNetUnfolder]: For 26319/26319 co-relation queries the response was YES. [2023-08-31 22:10:23,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35683 conditions, 10649 events. 5523/10649 cut-off events. For 26319/26319 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 71019 event pairs, 2002 based on Foata normal form. 40/10489 useless extension candidates. Maximal degree in co-relation 35616. Up to 4128 conditions per place. [2023-08-31 22:10:23,973 INFO L137 encePairwiseOnDemand]: 780/796 looper letters, 225 selfloop transitions, 56 changer transitions 0/287 dead transitions. [2023-08-31 22:10:23,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 287 transitions, 2790 flow [2023-08-31 22:10:23,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:10:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:10:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4049 transitions. [2023-08-31 22:10:23,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36333452979181624 [2023-08-31 22:10:23,976 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4049 transitions. [2023-08-31 22:10:23,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4049 transitions. [2023-08-31 22:10:23,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:10:23,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4049 transitions. [2023-08-31 22:10:23,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 289.2142857142857) internal successors, (4049), 14 states have internal predecessors, (4049), 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) [2023-08-31 22:10:23,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 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) [2023-08-31 22:10:23,986 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 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) [2023-08-31 22:10:23,987 INFO L175 Difference]: Start difference. First operand has 207 places, 155 transitions, 1564 flow. Second operand 14 states and 4049 transitions. [2023-08-31 22:10:23,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 287 transitions, 2790 flow [2023-08-31 22:10:24,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 287 transitions, 2722 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-31 22:10:24,076 INFO L231 Difference]: Finished difference. Result has 214 places, 157 transitions, 1634 flow [2023-08-31 22:10:24,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1634, PETRI_PLACES=214, PETRI_TRANSITIONS=157} [2023-08-31 22:10:24,077 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 73 predicate places. [2023-08-31 22:10:24,077 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 157 transitions, 1634 flow [2023-08-31 22:10:24,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 278.6666666666667) internal successors, (5016), 18 states have internal predecessors, (5016), 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) [2023-08-31 22:10:24,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:10:24,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:10:24,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-31 22:10:24,078 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:10:24,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:10:24,079 INFO L85 PathProgramCache]: Analyzing trace with hash -730517279, now seen corresponding path program 3 times [2023-08-31 22:10:24,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:10:24,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128495399] [2023-08-31 22:10:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:10:24,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:10:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15