./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/queue_longest.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_longest.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 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 --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 22:07:34,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 22:07:34,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 22:07:34,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 22:07:34,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 22:07:34,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 22:07:34,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 22:07:34,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 22:07:34,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 22:07:34,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 22:07:34,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 22:07:34,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 22:07:34,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 22:07:34,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 22:07:34,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 22:07:34,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 22:07:34,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 22:07:34,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 22:07:34,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 22:07:34,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 22:07:34,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 22:07:34,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 22:07:34,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 22:07:34,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 22:07:34,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 22:07:34,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 22:07:34,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 22:07:34,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 22:07:34,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 22:07:34,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 22:07:34,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 22:07:34,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 22:07:34,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 22:07:34,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 22:07:34,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 22:07:34,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 22:07:34,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 22:07:34,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 22:07:34,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 22:07:34,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 22:07:34,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 22:07:34,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-31 22:07:35,013 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 22:07:35,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 22:07:35,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 22:07:35,014 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 22:07:35,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 22:07:35,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 22:07:35,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 22:07:35,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 22:07:35,016 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 22:07:35,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 22:07:35,017 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 22:07:35,017 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 22:07:35,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 22:07:35,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 22:07:35,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 22:07:35,018 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-31 22:07:35,018 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-31 22:07:35,018 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-31 22:07:35,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 22:07:35,019 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-31 22:07:35,019 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 22:07:35,019 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 22:07:35,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 22:07:35,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 22:07:35,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 22:07:35,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:07:35,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 22:07:35,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 22:07:35,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 22:07:35,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 22:07:35,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 22:07:35,021 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 22:07:35,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 22:07:35,022 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 22:07:35,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 22:07:35,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 22:07:35,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 22:07:35,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 22:07:35,350 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 22:07:35,350 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 22:07:35,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_longest.i [2023-08-31 22:07:36,490 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 22:07:36,745 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 22:07:36,745 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i [2023-08-31 22:07:36,762 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7da5bd2ee/70e69d0b4e04440b914a8f2265532418/FLAGfbee5cce8 [2023-08-31 22:07:36,783 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7da5bd2ee/70e69d0b4e04440b914a8f2265532418 [2023-08-31 22:07:36,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 22:07:36,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 22:07:36,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 22:07:36,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 22:07:36,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 22:07:36,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:07:36" (1/1) ... [2023-08-31 22:07:36,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5ac3f8 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 22:07:36,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 10:07:36" (1/1) ... [2023-08-31 22:07:36,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 22:07:36,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 22:07:37,281 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_longest.i[43296,43309] [2023-08-31 22:07:37,290 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_longest.i[43503,43516] [2023-08-31 22:07:37,293 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_longest.i[43783,43796] [2023-08-31 22:07:37,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:07:37,317 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 22:07:37,381 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_longest.i[43296,43309] [2023-08-31 22:07:37,388 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_longest.i[43503,43516] [2023-08-31 22:07:37,395 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_longest.i[43783,43796] [2023-08-31 22:07:37,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 22:07:37,448 INFO L208 MainTranslator]: Completed translation [2023-08-31 22:07:37,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 10:07:37 WrapperNode [2023-08-31 22:07:37,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 22:07:37,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 22:07:37,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 22:07:37,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 22:07:37,456 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 22:07:37,475 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 22:07:37,502 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2023-08-31 22:07:37,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 22:07:37,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 22:07:37,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 22:07:37,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 22:07:37,513 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 22:07:37,513 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 22:07:37,520 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 22:07:37,521 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 22:07:37,535 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 22:07:37,551 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 22:07:37,553 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 22:07:37,556 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 22:07:37,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 22:07:37,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 22:07:37,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 22:07:37,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 22:07:37,561 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 22:07:37,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 22:07:37,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:07:37,591 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 22:07:37,609 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 22:07:37,649 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-31 22:07:37,649 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-31 22:07:37,649 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-31 22:07:37,650 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-31 22:07:37,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 22:07:37,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 22:07:37,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 22:07:37,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 22:07:37,650 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 22:07:37,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 22:07:37,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 22:07:37,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 22:07:37,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 22:07:37,652 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 22:07:37,774 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 22:07:37,776 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 22:07:38,402 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 22:07:38,410 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 22:07:38,411 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 22:07:38,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 10:07:38 BoogieIcfgContainer [2023-08-31 22:07:38,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 22:07:38,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 22:07:38,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 22:07:38,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 22:07:38,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 10:07:36" (1/3) ... [2023-08-31 22:07:38,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9efb92 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 22:07:38,420 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 22:07:38,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9efb92 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 22:07:38,420 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 22:07:38,421 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2023-08-31 22:07:38,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 22:07:38,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-08-31 22:07:38,437 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 22:07:38,585 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 22:07:38,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 338 transitions, 692 flow [2023-08-31 22:07:38,793 INFO L130 PetriNetUnfolder]: 15/336 cut-off events. [2023-08-31 22:07:38,794 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:07:38,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 336 events. 15/336 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 755 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 245. Up to 2 conditions per place. [2023-08-31 22:07:38,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 338 transitions, 692 flow [2023-08-31 22:07:38,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 332 transitions, 676 flow [2023-08-31 22:07:38,824 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 22:07:38,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-31 22:07:38,840 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-31 22:07:38,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 324 places, 332 transitions, 676 flow [2023-08-31 22:07:38,919 INFO L130 PetriNetUnfolder]: 15/332 cut-off events. [2023-08-31 22:07:38,920 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 22:07:38,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 332 events. 15/332 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 741 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 245. Up to 2 conditions per place. [2023-08-31 22:07:38,938 INFO L119 LiptonReduction]: Number of co-enabled transitions 28780 [2023-08-31 22:07:51,682 INFO L134 LiptonReduction]: Checked pairs total: 105796 [2023-08-31 22:07:51,683 INFO L136 LiptonReduction]: Total number of compositions: 415 [2023-08-31 22:07:51,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 22:07:51,701 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;@7771acb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 22:07:51,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-08-31 22:07:51,703 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-31 22:07:51,703 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 22:07:51,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:51,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-31 22:07:51,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:51,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:51,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1407, now seen corresponding path program 1 times [2023-08-31 22:07:51,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:51,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862856991] [2023-08-31 22:07:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:51,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:51,879 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 22:07:51,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:51,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862856991] [2023-08-31 22:07:51,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862856991] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:51,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:51,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-31 22:07:51,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677772853] [2023-08-31 22:07:51,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:51,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-31 22:07:51,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-31 22:07:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-31 22:07:51,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 753 [2023-08-31 22:07:51,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 142 transitions, 296 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 22:07:51,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:51,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 753 [2023-08-31 22:07:51,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:53,173 INFO L130 PetriNetUnfolder]: 7123/11650 cut-off events. [2023-08-31 22:07:53,173 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-31 22:07:53,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22548 conditions, 11650 events. 7123/11650 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 70134 event pairs, 6167 based on Foata normal form. 88/6498 useless extension candidates. Maximal degree in co-relation 22160. Up to 10787 conditions per place. [2023-08-31 22:07:53,244 INFO L137 encePairwiseOnDemand]: 704/753 looper letters, 82 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2023-08-31 22:07:53,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 362 flow [2023-08-31 22:07:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-31 22:07:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-31 22:07:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 781 transitions. [2023-08-31 22:07:53,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185922974767596 [2023-08-31 22:07:53,265 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 781 transitions. [2023-08-31 22:07:53,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 781 transitions. [2023-08-31 22:07:53,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:53,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 781 transitions. [2023-08-31 22:07:53,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 390.5) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states 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 22:07:53,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 753.0) internal successors, (2259), 3 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states 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 22:07:53,286 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 753.0) internal successors, (2259), 3 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states 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 22:07:53,287 INFO L175 Difference]: Start difference. First operand has 139 places, 142 transitions, 296 flow. Second operand 2 states and 781 transitions. [2023-08-31 22:07:53,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 362 flow [2023-08-31 22:07:53,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 22:07:53,309 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 190 flow [2023-08-31 22:07:53,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2023-08-31 22:07:53,314 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2023-08-31 22:07:53,315 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 190 flow [2023-08-31 22:07:53,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states 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 22:07:53,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:53,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:53,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 22:07:53,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:53,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1397048, now seen corresponding path program 1 times [2023-08-31 22:07:53,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:53,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282604153] [2023-08-31 22:07:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:53,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:53,615 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 22:07:53,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:53,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282604153] [2023-08-31 22:07:53,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282604153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:53,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:53,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:53,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048170634] [2023-08-31 22:07:53,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:53,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:53,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:53,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:53,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 753 [2023-08-31 22:07:53,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 22:07:53,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:53,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 753 [2023-08-31 22:07:53,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:54,645 INFO L130 PetriNetUnfolder]: 6353/10400 cut-off events. [2023-08-31 22:07:54,647 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:07:54,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20043 conditions, 10400 events. 6353/10400 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 61482 event pairs, 5453 based on Foata normal form. 0/5972 useless extension candidates. Maximal degree in co-relation 20040. Up to 9599 conditions per place. [2023-08-31 22:07:54,704 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 76 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-31 22:07:54,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 89 transitions, 338 flow [2023-08-31 22:07:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-31 22:07:54,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639220894200974 [2023-08-31 22:07:54,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-31 22:07:54,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-31 22:07:54,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:54,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-31 22:07:54,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states 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 22:07:54,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:07:54,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:07:54,718 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 190 flow. Second operand 3 states and 1048 transitions. [2023-08-31 22:07:54,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 89 transitions, 338 flow [2023-08-31 22:07:54,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:07:54,722 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 186 flow [2023-08-31 22:07:54,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2023-08-31 22:07:54,723 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -52 predicate places. [2023-08-31 22:07:54,723 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 186 flow [2023-08-31 22:07:54,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 22:07:54,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:54,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:54,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 22:07:54,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:54,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1397046, now seen corresponding path program 1 times [2023-08-31 22:07:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:54,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236575579] [2023-08-31 22:07:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:54,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:54,961 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 22:07:54,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:54,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236575579] [2023-08-31 22:07:54,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236575579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:54,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:54,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218847726] [2023-08-31 22:07:54,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:54,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:54,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:54,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:54,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:55,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 753 [2023-08-31 22:07:55,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 22:07:55,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:55,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 753 [2023-08-31 22:07:55,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:55,887 INFO L130 PetriNetUnfolder]: 5480/8975 cut-off events. [2023-08-31 22:07:55,887 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:07:55,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17272 conditions, 8975 events. 5480/8975 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 51571 event pairs, 4648 based on Foata normal form. 0/5447 useless extension candidates. Maximal degree in co-relation 17268. Up to 8255 conditions per place. [2023-08-31 22:07:55,933 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 72 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-31 22:07:55,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 322 flow [2023-08-31 22:07:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-08-31 22:07:55,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46215139442231074 [2023-08-31 22:07:55,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-08-31 22:07:55,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-08-31 22:07:55,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:55,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-08-31 22:07:55,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states 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 22:07:55,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:07:55,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:07:55,945 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 186 flow. Second operand 3 states and 1044 transitions. [2023-08-31 22:07:55,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 322 flow [2023-08-31 22:07:55,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:07:55,949 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 174 flow [2023-08-31 22:07:55,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-08-31 22:07:55,952 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-31 22:07:55,952 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 174 flow [2023-08-31 22:07:55,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 22:07:55,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:55,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:55,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 22:07:55,953 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:55,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:55,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1396972, now seen corresponding path program 1 times [2023-08-31 22:07:55,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:55,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215012385] [2023-08-31 22:07:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:55,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:56,004 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 22:07:56,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215012385] [2023-08-31 22:07:56,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215012385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:56,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:56,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924447768] [2023-08-31 22:07:56,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:56,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:56,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:56,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-31 22:07:56,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 22:07:56,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:56,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-31 22:07:56,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:56,747 INFO L130 PetriNetUnfolder]: 5420/8856 cut-off events. [2023-08-31 22:07:56,748 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:07:56,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17039 conditions, 8856 events. 5420/8856 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 50619 event pairs, 4596 based on Foata normal form. 0/5402 useless extension candidates. Maximal degree in co-relation 17035. Up to 8141 conditions per place. [2023-08-31 22:07:56,791 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 69 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-31 22:07:56,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 312 flow [2023-08-31 22:07:56,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:56,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-31 22:07:56,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-31 22:07:56,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-31 22:07:56,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-31 22:07:56,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:56,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-31 22:07:56,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 22:07:56,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:07:56,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:07:56,807 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 174 flow. Second operand 3 states and 1021 transitions. [2023-08-31 22:07:56,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 312 flow [2023-08-31 22:07:56,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:07:56,810 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2023-08-31 22:07:56,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, 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=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-08-31 22:07:56,811 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2023-08-31 22:07:56,811 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2023-08-31 22:07:56,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 22:07:56,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:56,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-31 22:07:56,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 22:07:56,813 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:56,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:56,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1396973, now seen corresponding path program 1 times [2023-08-31 22:07:56,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:56,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639939806] [2023-08-31 22:07:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:56,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:56,878 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 22:07:56,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:56,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639939806] [2023-08-31 22:07:56,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639939806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:56,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:56,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 22:07:56,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129201201] [2023-08-31 22:07:56,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:56,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:07:56,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:07:56,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:07:57,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-31 22:07:57,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states 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 22:07:57,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:57,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-31 22:07:57,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:57,682 INFO L130 PetriNetUnfolder]: 5360/8737 cut-off events. [2023-08-31 22:07:57,682 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:07:57,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16809 conditions, 8737 events. 5360/8737 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 49680 event pairs, 4544 based on Foata normal form. 0/5357 useless extension candidates. Maximal degree in co-relation 16805. Up to 8028 conditions per place. [2023-08-31 22:07:57,735 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 67 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-31 22:07:57,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 307 flow [2023-08-31 22:07:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:07:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:07:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-31 22:07:57,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563966356795042 [2023-08-31 22:07:57,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-31 22:07:57,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-31 22:07:57,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:57,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-31 22:07:57,742 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 22:07:57,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:07:57,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:07:57,747 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 3 states and 1031 transitions. [2023-08-31 22:07:57,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 307 flow [2023-08-31 22:07:57,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:07:57,751 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 169 flow [2023-08-31 22:07:57,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-08-31 22:07:57,753 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2023-08-31 22:07:57,754 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 169 flow [2023-08-31 22:07:57,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states 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 22:07:57,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:57,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 22:07:57,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 22:07:57,755 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 22:07:57,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:57,756 INFO L85 PathProgramCache]: Analyzing trace with hash 43308809, now seen corresponding path program 1 times [2023-08-31 22:07:57,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:57,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529819819] [2023-08-31 22:07:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:57,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:58,151 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 22:07:58,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:58,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529819819] [2023-08-31 22:07:58,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529819819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:58,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:58,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:07:58,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259316211] [2023-08-31 22:07:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:07:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:58,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:07:58,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:07:58,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 753 [2023-08-31 22:07:58,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 22:07:58,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:58,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 753 [2023-08-31 22:07:58,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:07:59,173 INFO L130 PetriNetUnfolder]: 5645/9113 cut-off events. [2023-08-31 22:07:59,173 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 22:07:59,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17623 conditions, 9113 events. 5645/9113 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 51051 event pairs, 4618 based on Foata normal form. 0/5451 useless extension candidates. Maximal degree in co-relation 17619. Up to 8462 conditions per place. [2023-08-31 22:07:59,211 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 71 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-08-31 22:07:59,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 335 flow [2023-08-31 22:07:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:07:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:07:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1298 transitions. [2023-08-31 22:07:59,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309428950863214 [2023-08-31 22:07:59,215 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1298 transitions. [2023-08-31 22:07:59,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1298 transitions. [2023-08-31 22:07:59,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:07:59,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1298 transitions. [2023-08-31 22:07:59,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states 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 22:07:59,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:07:59,224 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:07:59,224 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 169 flow. Second operand 4 states and 1298 transitions. [2023-08-31 22:07:59,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 335 flow [2023-08-31 22:07:59,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:07:59,227 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 204 flow [2023-08-31 22:07:59,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2023-08-31 22:07:59,227 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-31 22:07:59,228 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 204 flow [2023-08-31 22:07:59,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 22:07:59,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:07:59,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:07:59,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 22:07:59,229 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:07:59,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:07:59,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1342574226, now seen corresponding path program 1 times [2023-08-31 22:07:59,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:07:59,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981240469] [2023-08-31 22:07:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:07:59,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:07:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:07:59,332 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 22:07:59,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:07:59,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981240469] [2023-08-31 22:07:59,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981240469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:07:59,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:07:59,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:07:59,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587831521] [2023-08-31 22:07:59,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:07:59,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:07:59,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:07:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:07:59,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:07:59,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 753 [2023-08-31 22:07:59,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states 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 22:07:59,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:07:59,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 753 [2023-08-31 22:07:59,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:00,331 INFO L130 PetriNetUnfolder]: 4666/7530 cut-off events. [2023-08-31 22:08:00,331 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-08-31 22:08:00,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14881 conditions, 7530 events. 4666/7530 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 41926 event pairs, 54 based on Foata normal form. 156/4886 useless extension candidates. Maximal degree in co-relation 14875. Up to 6684 conditions per place. [2023-08-31 22:08:00,367 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 112 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-08-31 22:08:00,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 526 flow [2023-08-31 22:08:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 22:08:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 22:08:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1629 transitions. [2023-08-31 22:08:00,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43266932270916336 [2023-08-31 22:08:00,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1629 transitions. [2023-08-31 22:08:00,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1629 transitions. [2023-08-31 22:08:00,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:00,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1629 transitions. [2023-08-31 22:08:00,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.8) internal successors, (1629), 5 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states 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 22:08:00,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 753.0) internal successors, (4518), 6 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states 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 22:08:00,381 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 753.0) internal successors, (4518), 6 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states 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 22:08:00,381 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 204 flow. Second operand 5 states and 1629 transitions. [2023-08-31 22:08:00,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 526 flow [2023-08-31 22:08:00,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-31 22:08:00,386 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 199 flow [2023-08-31 22:08:00,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-08-31 22:08:00,387 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-31 22:08:00,387 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 199 flow [2023-08-31 22:08:00,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states 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 22:08:00,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:00,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:00,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 22:08:00,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:00,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:00,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1342534681, now seen corresponding path program 1 times [2023-08-31 22:08:00,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:00,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268646521] [2023-08-31 22:08:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:00,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:01,111 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 22:08:01,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:01,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268646521] [2023-08-31 22:08:01,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268646521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:01,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:01,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:01,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578673774] [2023-08-31 22:08:01,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:01,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:08:01,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:08:01,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:08:03,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 753 [2023-08-31 22:08:03,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 22:08:03,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:03,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 753 [2023-08-31 22:08:03,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:05,488 INFO L130 PetriNetUnfolder]: 5515/8889 cut-off events. [2023-08-31 22:08:05,488 INFO L131 PetriNetUnfolder]: For 932/932 co-relation queries the response was YES. [2023-08-31 22:08:05,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17997 conditions, 8889 events. 5515/8889 cut-off events. For 932/932 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 49899 event pairs, 1238 based on Foata normal form. 41/5721 useless extension candidates. Maximal degree in co-relation 17990. Up to 7665 conditions per place. [2023-08-31 22:08:05,538 INFO L137 encePairwiseOnDemand]: 746/753 looper letters, 98 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2023-08-31 22:08:05,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 511 flow [2023-08-31 22:08:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:08:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:08:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1324 transitions. [2023-08-31 22:08:05,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395750332005312 [2023-08-31 22:08:05,549 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1324 transitions. [2023-08-31 22:08:05,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1324 transitions. [2023-08-31 22:08:05,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:05,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1324 transitions. [2023-08-31 22:08:05,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states 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 22:08:05,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:08:05,558 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:08:05,558 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 199 flow. Second operand 4 states and 1324 transitions. [2023-08-31 22:08:05,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 511 flow [2023-08-31 22:08:05,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 118 transitions, 498 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:08:05,563 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 257 flow [2023-08-31 22:08:05,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2023-08-31 22:08:05,565 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-31 22:08:05,565 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 257 flow [2023-08-31 22:08:05,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 22:08:05,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:05,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:05,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 22:08:05,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:05,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523318, now seen corresponding path program 1 times [2023-08-31 22:08:05,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:05,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599748687] [2023-08-31 22:08:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:05,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:05,655 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 22:08:05,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:05,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599748687] [2023-08-31 22:08:05,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599748687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:05,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:05,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:05,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812903740] [2023-08-31 22:08:05,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:05,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:08:05,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:05,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:08:05,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:08:05,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 753 [2023-08-31 22:08:05,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states 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 22:08:05,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:05,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 753 [2023-08-31 22:08:05,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:06,343 INFO L130 PetriNetUnfolder]: 3815/6378 cut-off events. [2023-08-31 22:08:06,344 INFO L131 PetriNetUnfolder]: For 690/690 co-relation queries the response was YES. [2023-08-31 22:08:06,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13164 conditions, 6378 events. 3815/6378 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 35230 event pairs, 3058 based on Foata normal form. 0/4339 useless extension candidates. Maximal degree in co-relation 13155. Up to 5822 conditions per place. [2023-08-31 22:08:06,374 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 70 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-31 22:08:06,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 399 flow [2023-08-31 22:08:06,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-31 22:08:06,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45108455068614434 [2023-08-31 22:08:06,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-31 22:08:06,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-31 22:08:06,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:06,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-31 22:08:06,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states 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 22:08:06,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:06,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:06,384 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 257 flow. Second operand 3 states and 1019 transitions. [2023-08-31 22:08:06,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 399 flow [2023-08-31 22:08:06,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 86 transitions, 397 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-31 22:08:06,388 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 257 flow [2023-08-31 22:08:06,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=83, 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=257, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-08-31 22:08:06,389 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-31 22:08:06,389 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 257 flow [2023-08-31 22:08:06,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states 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 22:08:06,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:06,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:06,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 22:08:06,390 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:06,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:06,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523317, now seen corresponding path program 1 times [2023-08-31 22:08:06,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:06,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175950230] [2023-08-31 22:08:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:06,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:06,446 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 22:08:06,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:06,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175950230] [2023-08-31 22:08:06,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175950230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:06,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:06,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:06,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118003787] [2023-08-31 22:08:06,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:06,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:08:06,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:06,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:08:06,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:08:06,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 753 [2023-08-31 22:08:06,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 22:08:06,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:06,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 753 [2023-08-31 22:08:06,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:07,020 INFO L130 PetriNetUnfolder]: 2361/4108 cut-off events. [2023-08-31 22:08:07,020 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2023-08-31 22:08:07,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8489 conditions, 4108 events. 2361/4108 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 21884 event pairs, 1841 based on Foata normal form. 0/3179 useless extension candidates. Maximal degree in co-relation 8479. Up to 3732 conditions per place. [2023-08-31 22:08:07,038 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 69 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-31 22:08:07,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 85 transitions, 397 flow [2023-08-31 22:08:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1000 transitions. [2023-08-31 22:08:07,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426737494466578 [2023-08-31 22:08:07,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1000 transitions. [2023-08-31 22:08:07,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1000 transitions. [2023-08-31 22:08:07,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:07,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1000 transitions. [2023-08-31 22:08:07,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.3333333333333) internal successors, (1000), 3 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states 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 22:08:07,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:07,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:07,048 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 257 flow. Second operand 3 states and 1000 transitions. [2023-08-31 22:08:07,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 85 transitions, 397 flow [2023-08-31 22:08:07,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:07,051 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 255 flow [2023-08-31 22:08:07,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2023-08-31 22:08:07,052 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-31 22:08:07,052 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 255 flow [2023-08-31 22:08:07,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 22:08:07,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:07,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-31 22:08:07,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 22:08:07,053 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 22:08:07,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:07,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1342575601, now seen corresponding path program 2 times [2023-08-31 22:08:07,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:07,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135380123] [2023-08-31 22:08:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:07,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:07,861 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 22:08:07,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:07,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135380123] [2023-08-31 22:08:07,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135380123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:07,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:07,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:07,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812888501] [2023-08-31 22:08:07,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:07,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:08:07,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:07,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:08:07,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:08:09,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 753 [2023-08-31 22:08:09,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 22:08:09,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:09,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 753 [2023-08-31 22:08:09,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:10,619 INFO L130 PetriNetUnfolder]: 2440/4159 cut-off events. [2023-08-31 22:08:10,620 INFO L131 PetriNetUnfolder]: For 599/599 co-relation queries the response was YES. [2023-08-31 22:08:10,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8761 conditions, 4159 events. 2440/4159 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 21706 event pairs, 602 based on Foata normal form. 21/3249 useless extension candidates. Maximal degree in co-relation 8751. Up to 3621 conditions per place. [2023-08-31 22:08:10,637 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 91 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2023-08-31 22:08:10,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 112 transitions, 524 flow [2023-08-31 22:08:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:08:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:08:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1315 transitions. [2023-08-31 22:08:10,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658698539176627 [2023-08-31 22:08:10,641 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1315 transitions. [2023-08-31 22:08:10,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1315 transitions. [2023-08-31 22:08:10,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:10,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1315 transitions. [2023-08-31 22:08:10,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 328.75) internal successors, (1315), 4 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states 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 22:08:10,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:08:10,649 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:08:10,649 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 255 flow. Second operand 4 states and 1315 transitions. [2023-08-31 22:08:10,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 112 transitions, 524 flow [2023-08-31 22:08:10,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 112 transitions, 518 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:10,653 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 294 flow [2023-08-31 22:08:10,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2023-08-31 22:08:10,654 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -53 predicate places. [2023-08-31 22:08:10,654 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 294 flow [2023-08-31 22:08:10,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 22:08:10,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:10,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:10,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 22:08:10,655 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 22:08:10,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash 379604633, now seen corresponding path program 1 times [2023-08-31 22:08:10,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:10,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968515427] [2023-08-31 22:08:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:10,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:10,695 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 22:08:10,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:10,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968515427] [2023-08-31 22:08:10,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968515427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:10,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:10,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:10,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528885717] [2023-08-31 22:08:10,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:10,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:10,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:10,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:10,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-31 22:08:10,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 22:08:10,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:10,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-31 22:08:10,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:10,965 INFO L130 PetriNetUnfolder]: 1607/2797 cut-off events. [2023-08-31 22:08:10,966 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2023-08-31 22:08:10,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2797 events. 1607/2797 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12135 event pairs, 778 based on Foata normal form. 66/2213 useless extension candidates. Maximal degree in co-relation 5656. Up to 1688 conditions per place. [2023-08-31 22:08:10,978 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 91 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2023-08-31 22:08:10,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 478 flow [2023-08-31 22:08:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-08-31 22:08:10,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46569278441788403 [2023-08-31 22:08:10,981 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-08-31 22:08:10,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-08-31 22:08:10,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:10,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-08-31 22:08:10,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 22:08:10,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:10,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:10,988 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 294 flow. Second operand 3 states and 1052 transitions. [2023-08-31 22:08:10,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 478 flow [2023-08-31 22:08:10,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 106 transitions, 443 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-31 22:08:10,992 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 209 flow [2023-08-31 22:08:10,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2023-08-31 22:08:10,993 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2023-08-31 22:08:10,993 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 209 flow [2023-08-31 22:08:10,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 22:08:10,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:10,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:10,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 22:08:10,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:10,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash 236453581, now seen corresponding path program 1 times [2023-08-31 22:08:10,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:10,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153872303] [2023-08-31 22:08:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:10,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:12,125 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 22:08:12,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:12,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153872303] [2023-08-31 22:08:12,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153872303] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:12,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:12,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 22:08:12,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875686920] [2023-08-31 22:08:12,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:12,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 22:08:12,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:12,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 22:08:12,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-31 22:08:14,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 753 [2023-08-31 22:08:14,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 209 flow. Second operand has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states 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 22:08:14,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:14,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 753 [2023-08-31 22:08:14,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:15,905 INFO L130 PetriNetUnfolder]: 1662/2938 cut-off events. [2023-08-31 22:08:15,906 INFO L131 PetriNetUnfolder]: For 187/187 co-relation queries the response was YES. [2023-08-31 22:08:15,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5906 conditions, 2938 events. 1662/2938 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 13032 event pairs, 1270 based on Foata normal form. 0/2267 useless extension candidates. Maximal degree in co-relation 5898. Up to 2690 conditions per place. [2023-08-31 22:08:15,917 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 67 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2023-08-31 22:08:15,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 393 flow [2023-08-31 22:08:15,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:08:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:08:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2171 transitions. [2023-08-31 22:08:15,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118763043065832 [2023-08-31 22:08:15,922 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2171 transitions. [2023-08-31 22:08:15,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2171 transitions. [2023-08-31 22:08:15,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:15,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2171 transitions. [2023-08-31 22:08:15,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 310.14285714285717) internal successors, (2171), 7 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states 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 22:08:15,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 22:08:15,933 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 22:08:15,933 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 209 flow. Second operand 7 states and 2171 transitions. [2023-08-31 22:08:15,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 393 flow [2023-08-31 22:08:15,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:08:15,936 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 269 flow [2023-08-31 22:08:15,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2023-08-31 22:08:15,937 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2023-08-31 22:08:15,937 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 269 flow [2023-08-31 22:08:15,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states 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 22:08:15,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:15,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:15,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 22:08:15,938 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 22:08:15,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash 138579933, now seen corresponding path program 1 times [2023-08-31 22:08:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:15,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958613173] [2023-08-31 22:08:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:15,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:16,078 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 22:08:16,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:16,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958613173] [2023-08-31 22:08:16,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958613173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:16,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:16,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:16,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121768018] [2023-08-31 22:08:16,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:16,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:08:16,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:08:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:08:16,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-31 22:08:16,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 22:08:16,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:16,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-31 22:08:16,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:16,519 INFO L130 PetriNetUnfolder]: 1548/2769 cut-off events. [2023-08-31 22:08:16,519 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-31 22:08:16,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5625 conditions, 2769 events. 1548/2769 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12367 event pairs, 1180 based on Foata normal form. 0/2133 useless extension candidates. Maximal degree in co-relation 5614. Up to 2508 conditions per place. [2023-08-31 22:08:16,527 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 68 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-31 22:08:16,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 84 transitions, 407 flow [2023-08-31 22:08:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:08:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:08:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1342 transitions. [2023-08-31 22:08:16,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455511288180611 [2023-08-31 22:08:16,530 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1342 transitions. [2023-08-31 22:08:16,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1342 transitions. [2023-08-31 22:08:16,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:16,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1342 transitions. [2023-08-31 22:08:16,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 335.5) internal successors, (1342), 4 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states 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 22:08:16,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:08:16,537 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:08:16,537 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 269 flow. Second operand 4 states and 1342 transitions. [2023-08-31 22:08:16,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 84 transitions, 407 flow [2023-08-31 22:08:16,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 389 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 22:08:16,539 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 253 flow [2023-08-31 22:08:16,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-08-31 22:08:16,540 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -51 predicate places. [2023-08-31 22:08:16,540 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 253 flow [2023-08-31 22:08:16,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 22:08:16,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:16,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:16,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 22:08:16,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:16,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:16,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1454248524, now seen corresponding path program 1 times [2023-08-31 22:08:16,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:16,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709800578] [2023-08-31 22:08:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:16,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:16,623 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 22:08:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709800578] [2023-08-31 22:08:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709800578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:16,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:16,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:16,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072894635] [2023-08-31 22:08:16,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:16,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:08:16,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:08:16,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:08:16,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 753 [2023-08-31 22:08:16,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 312.5) internal successors, (1250), 4 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states 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 22:08:16,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:16,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 753 [2023-08-31 22:08:16,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:17,138 INFO L130 PetriNetUnfolder]: 1454/2575 cut-off events. [2023-08-31 22:08:17,139 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-31 22:08:17,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 2575 events. 1454/2575 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11157 event pairs, 1101 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 5211. Up to 2352 conditions per place. [2023-08-31 22:08:17,146 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 66 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-31 22:08:17,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 81 transitions, 383 flow [2023-08-31 22:08:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:17,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 992 transitions. [2023-08-31 22:08:17,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43913235945108453 [2023-08-31 22:08:17,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 992 transitions. [2023-08-31 22:08:17,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 992 transitions. [2023-08-31 22:08:17,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:17,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 992 transitions. [2023-08-31 22:08:17,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 22:08:17,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:17,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:17,154 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 253 flow. Second operand 3 states and 992 transitions. [2023-08-31 22:08:17,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 81 transitions, 383 flow [2023-08-31 22:08:17,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:17,156 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 248 flow [2023-08-31 22:08:17,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2023-08-31 22:08:17,157 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-31 22:08:17,157 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 248 flow [2023-08-31 22:08:17,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 312.5) internal successors, (1250), 4 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states 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 22:08:17,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:17,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:17,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 22:08:17,158 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:17,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:17,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1009501, now seen corresponding path program 1 times [2023-08-31 22:08:17,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:17,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013912325] [2023-08-31 22:08:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:17,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:17,195 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 22:08:17,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:17,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013912325] [2023-08-31 22:08:17,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013912325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:17,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:17,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:17,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306822920] [2023-08-31 22:08:17,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:17,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:17,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:17,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:17,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:17,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-31 22:08:17,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 22:08:17,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:17,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-31 22:08:17,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:17,528 INFO L130 PetriNetUnfolder]: 1444/2565 cut-off events. [2023-08-31 22:08:17,528 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-31 22:08:17,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5204 conditions, 2565 events. 1444/2565 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11142 event pairs, 1090 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 5193. Up to 2312 conditions per place. [2023-08-31 22:08:17,541 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 70 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-31 22:08:17,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 411 flow [2023-08-31 22:08:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1026 transitions. [2023-08-31 22:08:17,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541832669322709 [2023-08-31 22:08:17,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1026 transitions. [2023-08-31 22:08:17,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1026 transitions. [2023-08-31 22:08:17,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:17,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1026 transitions. [2023-08-31 22:08:17,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 22:08:17,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:17,551 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:17,551 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 248 flow. Second operand 3 states and 1026 transitions. [2023-08-31 22:08:17,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 411 flow [2023-08-31 22:08:17,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:17,553 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 250 flow [2023-08-31 22:08:17,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2023-08-31 22:08:17,554 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-31 22:08:17,554 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 250 flow [2023-08-31 22:08:17,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 22:08:17,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:17,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:17,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 22:08:17,555 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:17,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash 972426745, now seen corresponding path program 1 times [2023-08-31 22:08:17,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:17,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107559730] [2023-08-31 22:08:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:17,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:17,932 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 22:08:17,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:17,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107559730] [2023-08-31 22:08:17,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107559730] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:17,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:17,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:08:17,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781802903] [2023-08-31 22:08:17,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:17,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:08:17,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:17,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:08:17,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:08:18,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 753 [2023-08-31 22:08:18,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 296.85714285714283) internal successors, (2078), 7 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states 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 22:08:18,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:18,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 753 [2023-08-31 22:08:18,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:19,110 INFO L130 PetriNetUnfolder]: 1696/2963 cut-off events. [2023-08-31 22:08:19,110 INFO L131 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2023-08-31 22:08:19,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6142 conditions, 2963 events. 1696/2963 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12936 event pairs, 501 based on Foata normal form. 9/2420 useless extension candidates. Maximal degree in co-relation 6131. Up to 2427 conditions per place. [2023-08-31 22:08:19,122 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 91 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2023-08-31 22:08:19,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 563 flow [2023-08-31 22:08:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:08:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:08:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1873 transitions. [2023-08-31 22:08:19,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41456396635679504 [2023-08-31 22:08:19,125 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1873 transitions. [2023-08-31 22:08:19,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1873 transitions. [2023-08-31 22:08:19,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:19,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1873 transitions. [2023-08-31 22:08:19,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 312.1666666666667) internal successors, (1873), 6 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states 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 22:08:19,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 22:08:19,133 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 22:08:19,133 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 250 flow. Second operand 6 states and 1873 transitions. [2023-08-31 22:08:19,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 563 flow [2023-08-31 22:08:19,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 549 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:19,137 INFO L231 Difference]: Finished difference. Result has 92 places, 86 transitions, 336 flow [2023-08-31 22:08:19,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=92, PETRI_TRANSITIONS=86} [2023-08-31 22:08:19,137 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -47 predicate places. [2023-08-31 22:08:19,138 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 86 transitions, 336 flow [2023-08-31 22:08:19,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 296.85714285714283) internal successors, (2078), 7 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states 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 22:08:19,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:19,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:19,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 22:08:19,139 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 22:08:19,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash -181419743, now seen corresponding path program 2 times [2023-08-31 22:08:19,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:19,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094729472] [2023-08-31 22:08:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:19,545 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 22:08:19,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:19,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094729472] [2023-08-31 22:08:19,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094729472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:19,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:19,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:08:19,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667428354] [2023-08-31 22:08:19,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:19,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:08:19,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:19,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:08:19,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:08:20,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 753 [2023-08-31 22:08:20,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 86 transitions, 336 flow. Second operand has 7 states, 7 states have (on average 296.85714285714283) internal successors, (2078), 7 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states 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 22:08:20,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:20,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 753 [2023-08-31 22:08:20,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:20,580 INFO L130 PetriNetUnfolder]: 1774/3099 cut-off events. [2023-08-31 22:08:20,580 INFO L131 PetriNetUnfolder]: For 453/453 co-relation queries the response was YES. [2023-08-31 22:08:20,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6676 conditions, 3099 events. 1774/3099 cut-off events. For 453/453 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 13734 event pairs, 493 based on Foata normal form. 9/2546 useless extension candidates. Maximal degree in co-relation 6661. Up to 2555 conditions per place. [2023-08-31 22:08:20,590 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 94 selfloop transitions, 19 changer transitions 0/122 dead transitions. [2023-08-31 22:08:20,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 653 flow [2023-08-31 22:08:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:08:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:08:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2167 transitions. [2023-08-31 22:08:20,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41111743502181747 [2023-08-31 22:08:20,593 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2167 transitions. [2023-08-31 22:08:20,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2167 transitions. [2023-08-31 22:08:20,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:20,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2167 transitions. [2023-08-31 22:08:20,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 309.57142857142856) internal successors, (2167), 7 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states 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 22:08:20,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 22:08:20,601 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 22:08:20,601 INFO L175 Difference]: Start difference. First operand has 92 places, 86 transitions, 336 flow. Second operand 7 states and 2167 transitions. [2023-08-31 22:08:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 653 flow [2023-08-31 22:08:20,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 647 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-31 22:08:20,606 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 406 flow [2023-08-31 22:08:20,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2023-08-31 22:08:20,607 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -39 predicate places. [2023-08-31 22:08:20,607 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 406 flow [2023-08-31 22:08:20,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 296.85714285714283) internal successors, (2078), 7 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states 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 22:08:20,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:20,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:20,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 22:08:20,608 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 22:08:20,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash -247492645, now seen corresponding path program 3 times [2023-08-31 22:08:20,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:20,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816068370] [2023-08-31 22:08:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:20,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:21,311 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 22:08:21,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:21,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816068370] [2023-08-31 22:08:21,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816068370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:21,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:21,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-31 22:08:21,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559991657] [2023-08-31 22:08:21,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:21,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:08:21,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:08:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:08:23,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 753 [2023-08-31 22:08:23,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 298.85714285714283) internal successors, (2092), 7 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states 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 22:08:23,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:23,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 753 [2023-08-31 22:08:23,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:24,901 INFO L130 PetriNetUnfolder]: 1730/3049 cut-off events. [2023-08-31 22:08:24,901 INFO L131 PetriNetUnfolder]: For 725/725 co-relation queries the response was YES. [2023-08-31 22:08:24,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6638 conditions, 3049 events. 1730/3049 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 13554 event pairs, 525 based on Foata normal form. 18/2513 useless extension candidates. Maximal degree in co-relation 6620. Up to 2277 conditions per place. [2023-08-31 22:08:24,912 INFO L137 encePairwiseOnDemand]: 746/753 looper letters, 88 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2023-08-31 22:08:24,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 668 flow [2023-08-31 22:08:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 22:08:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 22:08:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2173 transitions. [2023-08-31 22:08:24,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41225573894896606 [2023-08-31 22:08:24,917 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2173 transitions. [2023-08-31 22:08:24,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2173 transitions. [2023-08-31 22:08:24,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:24,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2173 transitions. [2023-08-31 22:08:24,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 310.42857142857144) internal successors, (2173), 7 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states 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 22:08:24,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 22:08:24,925 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 22:08:24,926 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 406 flow. Second operand 7 states and 2173 transitions. [2023-08-31 22:08:24,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 668 flow [2023-08-31 22:08:24,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 116 transitions, 647 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 22:08:24,931 INFO L231 Difference]: Finished difference. Result has 102 places, 86 transitions, 406 flow [2023-08-31 22:08:24,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=102, PETRI_TRANSITIONS=86} [2023-08-31 22:08:24,931 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -37 predicate places. [2023-08-31 22:08:24,932 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 86 transitions, 406 flow [2023-08-31 22:08:24,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 298.85714285714283) internal successors, (2092), 7 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states 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 22:08:24,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:24,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:24,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 22:08:24,933 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 22:08:24,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:24,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1611999738, now seen corresponding path program 1 times [2023-08-31 22:08:24,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:24,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491180930] [2023-08-31 22:08:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:24,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:25,660 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 22:08:25,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:25,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491180930] [2023-08-31 22:08:25,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491180930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:25,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:25,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-31 22:08:25,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107277583] [2023-08-31 22:08:25,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:25,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 22:08:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 22:08:25,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-31 22:08:27,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-31 22:08:27,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 86 transitions, 406 flow. Second operand has 10 states, 10 states have (on average 281.3) internal successors, (2813), 10 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 22:08:27,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:27,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-31 22:08:27,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:27,550 INFO L130 PetriNetUnfolder]: 1729/3050 cut-off events. [2023-08-31 22:08:27,550 INFO L131 PetriNetUnfolder]: For 975/975 co-relation queries the response was YES. [2023-08-31 22:08:27,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6692 conditions, 3050 events. 1729/3050 cut-off events. For 975/975 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 13557 event pairs, 1305 based on Foata normal form. 0/2483 useless extension candidates. Maximal degree in co-relation 6675. Up to 2807 conditions per place. [2023-08-31 22:08:27,561 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 78 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2023-08-31 22:08:27,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 104 transitions, 646 flow [2023-08-31 22:08:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:08:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:08:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2606 transitions. [2023-08-31 22:08:27,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845359303526634 [2023-08-31 22:08:27,566 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2606 transitions. [2023-08-31 22:08:27,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2606 transitions. [2023-08-31 22:08:27,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:27,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2606 transitions. [2023-08-31 22:08:27,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 289.55555555555554) internal successors, (2606), 9 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states 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 22:08:27,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 22:08:27,576 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 22:08:27,576 INFO L175 Difference]: Start difference. First operand has 102 places, 86 transitions, 406 flow. Second operand 9 states and 2606 transitions. [2023-08-31 22:08:27,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 104 transitions, 646 flow [2023-08-31 22:08:27,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 104 transitions, 608 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 22:08:27,581 INFO L231 Difference]: Finished difference. Result has 107 places, 93 transitions, 451 flow [2023-08-31 22:08:27,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=451, PETRI_PLACES=107, PETRI_TRANSITIONS=93} [2023-08-31 22:08:27,581 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -32 predicate places. [2023-08-31 22:08:27,581 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 93 transitions, 451 flow [2023-08-31 22:08:27,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 281.3) internal successors, (2813), 10 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 22:08:27,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:27,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:27,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 22:08:27,583 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 22:08:27,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash -580033310, now seen corresponding path program 1 times [2023-08-31 22:08:27,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:27,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666453156] [2023-08-31 22:08:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:27,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:28,320 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 22:08:28,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:28,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666453156] [2023-08-31 22:08:28,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666453156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:28,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:28,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-31 22:08:28,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633049806] [2023-08-31 22:08:28,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:28,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 22:08:28,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 22:08:28,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-31 22:08:30,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-31 22:08:30,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 93 transitions, 451 flow. Second operand has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 22:08:30,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:30,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-31 22:08:30,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:30,932 INFO L130 PetriNetUnfolder]: 1889/3315 cut-off events. [2023-08-31 22:08:30,932 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2023-08-31 22:08:30,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7304 conditions, 3315 events. 1889/3315 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 14980 event pairs, 546 based on Foata normal form. 0/2706 useless extension candidates. Maximal degree in co-relation 7284. Up to 2222 conditions per place. [2023-08-31 22:08:30,949 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 117 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2023-08-31 22:08:30,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 151 transitions, 867 flow [2023-08-31 22:08:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:08:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:08:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2644 transitions. [2023-08-31 22:08:30,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39014313117898775 [2023-08-31 22:08:30,954 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2644 transitions. [2023-08-31 22:08:30,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2644 transitions. [2023-08-31 22:08:30,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:30,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2644 transitions. [2023-08-31 22:08:30,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.77777777777777) internal successors, (2644), 9 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states 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 22:08:30,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 22:08:30,964 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 22:08:30,964 INFO L175 Difference]: Start difference. First operand has 107 places, 93 transitions, 451 flow. Second operand 9 states and 2644 transitions. [2023-08-31 22:08:30,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 151 transitions, 867 flow [2023-08-31 22:08:30,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 839 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-31 22:08:30,970 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 510 flow [2023-08-31 22:08:30,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=510, PETRI_PLACES=112, PETRI_TRANSITIONS=96} [2023-08-31 22:08:30,970 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -27 predicate places. [2023-08-31 22:08:30,971 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 510 flow [2023-08-31 22:08:30,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 22:08:30,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:30,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:30,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 22:08:30,972 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 22:08:30,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1567339102, now seen corresponding path program 2 times [2023-08-31 22:08:30,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:30,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067817046] [2023-08-31 22:08:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:30,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:31,645 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 22:08:31,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:31,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067817046] [2023-08-31 22:08:31,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067817046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:31,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:31,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-31 22:08:31,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712614286] [2023-08-31 22:08:31,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:31,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 22:08:31,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 22:08:31,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-31 22:08:33,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-31 22:08:33,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 96 transitions, 510 flow. Second operand has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 22:08:33,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:33,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-31 22:08:33,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:34,063 INFO L130 PetriNetUnfolder]: 1981/3481 cut-off events. [2023-08-31 22:08:34,064 INFO L131 PetriNetUnfolder]: For 1027/1027 co-relation queries the response was YES. [2023-08-31 22:08:34,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7908 conditions, 3481 events. 1981/3481 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 16097 event pairs, 652 based on Foata normal form. 0/2835 useless extension candidates. Maximal degree in co-relation 7886. Up to 2052 conditions per place. [2023-08-31 22:08:34,083 INFO L137 encePairwiseOnDemand]: 741/753 looper letters, 114 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2023-08-31 22:08:34,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 922 flow [2023-08-31 22:08:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:08:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:08:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2921 transitions. [2023-08-31 22:08:34,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38791500664010625 [2023-08-31 22:08:34,087 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2921 transitions. [2023-08-31 22:08:34,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2921 transitions. [2023-08-31 22:08:34,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:34,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2921 transitions. [2023-08-31 22:08:34,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 292.1) internal successors, (2921), 10 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states 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 22:08:34,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 22:08:34,094 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 22:08:34,094 INFO L175 Difference]: Start difference. First operand has 112 places, 96 transitions, 510 flow. Second operand 10 states and 2921 transitions. [2023-08-31 22:08:34,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 922 flow [2023-08-31 22:08:34,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 877 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-31 22:08:34,100 INFO L231 Difference]: Finished difference. Result has 117 places, 99 transitions, 567 flow [2023-08-31 22:08:34,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=567, PETRI_PLACES=117, PETRI_TRANSITIONS=99} [2023-08-31 22:08:34,101 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -22 predicate places. [2023-08-31 22:08:34,101 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 99 transitions, 567 flow [2023-08-31 22:08:34,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 22:08:34,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:34,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:08:34,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 22:08:34,102 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 22:08:34,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:34,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1567656232, now seen corresponding path program 3 times [2023-08-31 22:08:34,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:34,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925353968] [2023-08-31 22:08:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:34,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:35,375 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 22:08:35,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:35,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925353968] [2023-08-31 22:08:35,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925353968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:35,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:35,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-31 22:08:35,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132219891] [2023-08-31 22:08:35,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:35,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 22:08:35,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:35,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 22:08:35,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-31 22:08:38,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-31 22:08:38,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 99 transitions, 567 flow. Second operand has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 22:08:38,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:38,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-31 22:08:38,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:39,156 INFO L130 PetriNetUnfolder]: 1968/3458 cut-off events. [2023-08-31 22:08:39,156 INFO L131 PetriNetUnfolder]: For 1250/1250 co-relation queries the response was YES. [2023-08-31 22:08:39,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7957 conditions, 3458 events. 1968/3458 cut-off events. For 1250/1250 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 15985 event pairs, 655 based on Foata normal form. 0/2827 useless extension candidates. Maximal degree in co-relation 7933. Up to 2054 conditions per place. [2023-08-31 22:08:39,170 INFO L137 encePairwiseOnDemand]: 741/753 looper letters, 115 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2023-08-31 22:08:39,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 155 transitions, 979 flow [2023-08-31 22:08:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:08:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:08:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2926 transitions. [2023-08-31 22:08:39,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38857901726427624 [2023-08-31 22:08:39,173 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2926 transitions. [2023-08-31 22:08:39,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2926 transitions. [2023-08-31 22:08:39,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:39,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2926 transitions. [2023-08-31 22:08:39,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 292.6) internal successors, (2926), 10 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states 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 22:08:39,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 22:08:39,181 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 22:08:39,181 INFO L175 Difference]: Start difference. First operand has 117 places, 99 transitions, 567 flow. Second operand 10 states and 2926 transitions. [2023-08-31 22:08:39,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 155 transitions, 979 flow [2023-08-31 22:08:39,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 155 transitions, 945 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-31 22:08:39,189 INFO L231 Difference]: Finished difference. Result has 118 places, 97 transitions, 589 flow [2023-08-31 22:08:39,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=589, PETRI_PLACES=118, PETRI_TRANSITIONS=97} [2023-08-31 22:08:39,190 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -21 predicate places. [2023-08-31 22:08:39,190 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 97 transitions, 589 flow [2023-08-31 22:08:39,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 22:08:39,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:39,191 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 22:08:39,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 22:08:39,191 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 22:08:39,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1027074210, now seen corresponding path program 1 times [2023-08-31 22:08:39,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:39,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537595745] [2023-08-31 22:08:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:39,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:39,919 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 22:08:39,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537595745] [2023-08-31 22:08:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537595745] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:39,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:39,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-31 22:08:39,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929598703] [2023-08-31 22:08:39,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:39,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-31 22:08:39,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:39,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-31 22:08:39,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-31 22:08:41,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-31 22:08:41,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 97 transitions, 589 flow. Second operand has 10 states, 10 states have (on average 268.7) internal successors, (2687), 10 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states 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 22:08:41,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:41,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-31 22:08:41,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:41,750 INFO L130 PetriNetUnfolder]: 2127/3742 cut-off events. [2023-08-31 22:08:41,750 INFO L131 PetriNetUnfolder]: For 1910/1910 co-relation queries the response was YES. [2023-08-31 22:08:41,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8814 conditions, 3742 events. 2127/3742 cut-off events. For 1910/1910 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17650 event pairs, 1474 based on Foata normal form. 0/3054 useless extension candidates. Maximal degree in co-relation 8790. Up to 3192 conditions per place. [2023-08-31 22:08:41,764 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 106 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2023-08-31 22:08:41,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 134 transitions, 974 flow [2023-08-31 22:08:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:08:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:08:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2777 transitions. [2023-08-31 22:08:41,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687915006640106 [2023-08-31 22:08:41,768 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2777 transitions. [2023-08-31 22:08:41,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2777 transitions. [2023-08-31 22:08:41,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:41,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2777 transitions. [2023-08-31 22:08:41,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 277.7) internal successors, (2777), 10 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states 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 22:08:41,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 22:08:41,775 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 22:08:41,775 INFO L175 Difference]: Start difference. First operand has 118 places, 97 transitions, 589 flow. Second operand 10 states and 2777 transitions. [2023-08-31 22:08:41,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 134 transitions, 974 flow [2023-08-31 22:08:41,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 134 transitions, 900 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-31 22:08:41,784 INFO L231 Difference]: Finished difference. Result has 121 places, 101 transitions, 622 flow [2023-08-31 22:08:41,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=622, PETRI_PLACES=121, PETRI_TRANSITIONS=101} [2023-08-31 22:08:41,785 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -18 predicate places. [2023-08-31 22:08:41,785 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 101 transitions, 622 flow [2023-08-31 22:08:41,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 268.7) internal successors, (2687), 10 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states 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 22:08:41,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:41,786 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 22:08:41,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 22:08:41,786 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 22:08:41,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1749747090, now seen corresponding path program 1 times [2023-08-31 22:08:41,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:41,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365932921] [2023-08-31 22:08:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:41,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:42,556 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 22:08:42,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:42,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365932921] [2023-08-31 22:08:42,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365932921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:42,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:42,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-31 22:08:42,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130264608] [2023-08-31 22:08:42,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:42,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 22:08:42,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 22:08:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-31 22:08:44,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-31 22:08:44,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 101 transitions, 622 flow. Second operand has 11 states, 11 states have (on average 268.6363636363636) internal successors, (2955), 11 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states 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 22:08:44,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:44,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-31 22:08:44,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:44,707 INFO L130 PetriNetUnfolder]: 2114/3712 cut-off events. [2023-08-31 22:08:44,707 INFO L131 PetriNetUnfolder]: For 1632/1632 co-relation queries the response was YES. [2023-08-31 22:08:44,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8674 conditions, 3712 events. 2114/3712 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17469 event pairs, 647 based on Foata normal form. 9/3113 useless extension candidates. Maximal degree in co-relation 8647. Up to 2353 conditions per place. [2023-08-31 22:08:44,720 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 120 selfloop transitions, 27 changer transitions 0/155 dead transitions. [2023-08-31 22:08:44,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 155 transitions, 1037 flow [2023-08-31 22:08:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-31 22:08:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-31 22:08:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2525 transitions. [2023-08-31 22:08:44,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725837391176037 [2023-08-31 22:08:44,723 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2525 transitions. [2023-08-31 22:08:44,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2525 transitions. [2023-08-31 22:08:44,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:44,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2525 transitions. [2023-08-31 22:08:44,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.55555555555554) internal successors, (2525), 9 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states 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 22:08:44,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 22:08:44,729 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 22:08:44,729 INFO L175 Difference]: Start difference. First operand has 121 places, 101 transitions, 622 flow. Second operand 9 states and 2525 transitions. [2023-08-31 22:08:44,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 155 transitions, 1037 flow [2023-08-31 22:08:44,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1010 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 22:08:44,738 INFO L231 Difference]: Finished difference. Result has 124 places, 101 transitions, 659 flow [2023-08-31 22:08:44,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=659, PETRI_PLACES=124, PETRI_TRANSITIONS=101} [2023-08-31 22:08:44,738 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -15 predicate places. [2023-08-31 22:08:44,738 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 101 transitions, 659 flow [2023-08-31 22:08:44,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 268.6363636363636) internal successors, (2955), 11 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states 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 22:08:44,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:44,739 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 22:08:44,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 22:08:44,740 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 22:08:44,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:44,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2037496838, now seen corresponding path program 2 times [2023-08-31 22:08:44,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:44,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379504677] [2023-08-31 22:08:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:44,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:45,428 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 22:08:45,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:45,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379504677] [2023-08-31 22:08:45,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379504677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:45,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:45,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-31 22:08:45,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676738695] [2023-08-31 22:08:45,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:45,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 22:08:45,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 22:08:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-31 22:08:46,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-31 22:08:46,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 101 transitions, 659 flow. Second operand has 11 states, 11 states have (on average 268.6363636363636) internal successors, (2955), 11 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states 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 22:08:46,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:46,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-31 22:08:46,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:47,639 INFO L130 PetriNetUnfolder]: 2101/3682 cut-off events. [2023-08-31 22:08:47,639 INFO L131 PetriNetUnfolder]: For 2301/2301 co-relation queries the response was YES. [2023-08-31 22:08:47,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8854 conditions, 3682 events. 2101/3682 cut-off events. For 2301/2301 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17233 event pairs, 551 based on Foata normal form. 9/3089 useless extension candidates. Maximal degree in co-relation 8826. Up to 2061 conditions per place. [2023-08-31 22:08:47,650 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 117 selfloop transitions, 27 changer transitions 0/152 dead transitions. [2023-08-31 22:08:47,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 152 transitions, 1058 flow [2023-08-31 22:08:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 22:08:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 22:08:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2788 transitions. [2023-08-31 22:08:47,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3702523240371846 [2023-08-31 22:08:47,655 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2788 transitions. [2023-08-31 22:08:47,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2788 transitions. [2023-08-31 22:08:47,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:47,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2788 transitions. [2023-08-31 22:08:47,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 278.8) internal successors, (2788), 10 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states 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 22:08:47,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 22:08:47,663 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 22:08:47,663 INFO L175 Difference]: Start difference. First operand has 124 places, 101 transitions, 659 flow. Second operand 10 states and 2788 transitions. [2023-08-31 22:08:47,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 152 transitions, 1058 flow [2023-08-31 22:08:47,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 152 transitions, 1020 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-31 22:08:47,674 INFO L231 Difference]: Finished difference. Result has 128 places, 101 transitions, 686 flow [2023-08-31 22:08:47,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=686, PETRI_PLACES=128, PETRI_TRANSITIONS=101} [2023-08-31 22:08:47,675 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -11 predicate places. [2023-08-31 22:08:47,675 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 101 transitions, 686 flow [2023-08-31 22:08:47,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 268.6363636363636) internal successors, (2955), 11 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states 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 22:08:47,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:47,676 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 22:08:47,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-31 22:08:47,676 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:47,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:47,677 INFO L85 PathProgramCache]: Analyzing trace with hash 278044459, now seen corresponding path program 1 times [2023-08-31 22:08:47,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:47,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531780224] [2023-08-31 22:08:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:47,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:47,851 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 22:08:47,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:47,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531780224] [2023-08-31 22:08:47,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531780224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:47,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:47,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 22:08:47,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88872879] [2023-08-31 22:08:47,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 22:08:47,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 22:08:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 22:08:48,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-31 22:08:48,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 101 transitions, 686 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 22:08:48,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:48,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-31 22:08:48,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:48,419 INFO L130 PetriNetUnfolder]: 2386/4212 cut-off events. [2023-08-31 22:08:48,420 INFO L131 PetriNetUnfolder]: For 3177/3177 co-relation queries the response was YES. [2023-08-31 22:08:48,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10088 conditions, 4212 events. 2386/4212 cut-off events. For 3177/3177 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 21142 event pairs, 1059 based on Foata normal form. 0/3517 useless extension candidates. Maximal degree in co-relation 10059. Up to 3266 conditions per place. [2023-08-31 22:08:48,437 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 117 selfloop transitions, 3 changer transitions 0/137 dead transitions. [2023-08-31 22:08:48,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 137 transitions, 1014 flow [2023-08-31 22:08:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:08:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:08:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1356 transitions. [2023-08-31 22:08:48,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450199203187251 [2023-08-31 22:08:48,439 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1356 transitions. [2023-08-31 22:08:48,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1356 transitions. [2023-08-31 22:08:48,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:48,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1356 transitions. [2023-08-31 22:08:48,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states 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 22:08:48,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:08:48,443 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:08:48,443 INFO L175 Difference]: Start difference. First operand has 128 places, 101 transitions, 686 flow. Second operand 4 states and 1356 transitions. [2023-08-31 22:08:48,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 137 transitions, 1014 flow [2023-08-31 22:08:48,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 137 transitions, 970 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-31 22:08:48,456 INFO L231 Difference]: Finished difference. Result has 125 places, 102 transitions, 658 flow [2023-08-31 22:08:48,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=658, PETRI_PLACES=125, PETRI_TRANSITIONS=102} [2023-08-31 22:08:48,458 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -14 predicate places. [2023-08-31 22:08:48,458 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 102 transitions, 658 flow [2023-08-31 22:08:48,459 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 22:08:48,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:48,459 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 22:08:48,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-31 22:08:48,459 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:48,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1619278936, now seen corresponding path program 1 times [2023-08-31 22:08:48,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:48,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891732647] [2023-08-31 22:08:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:48,501 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 22:08:48,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:48,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891732647] [2023-08-31 22:08:48,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891732647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:48,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:48,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:48,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990404572] [2023-08-31 22:08:48,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:48,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:48,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:48,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:48,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:48,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 753 [2023-08-31 22:08:48,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 102 transitions, 658 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 22:08:48,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:48,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 753 [2023-08-31 22:08:48,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:48,759 INFO L130 PetriNetUnfolder]: 1607/2932 cut-off events. [2023-08-31 22:08:48,759 INFO L131 PetriNetUnfolder]: For 2377/2377 co-relation queries the response was YES. [2023-08-31 22:08:48,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7410 conditions, 2932 events. 1607/2932 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 13720 event pairs, 811 based on Foata normal form. 0/2595 useless extension candidates. Maximal degree in co-relation 7380. Up to 1537 conditions per place. [2023-08-31 22:08:48,770 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 101 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2023-08-31 22:08:48,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 118 transitions, 920 flow [2023-08-31 22:08:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1030 transitions. [2023-08-31 22:08:48,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45595396193005755 [2023-08-31 22:08:48,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1030 transitions. [2023-08-31 22:08:48,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1030 transitions. [2023-08-31 22:08:48,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:48,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1030 transitions. [2023-08-31 22:08:48,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states 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 22:08:48,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:48,774 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:48,774 INFO L175 Difference]: Start difference. First operand has 125 places, 102 transitions, 658 flow. Second operand 3 states and 1030 transitions. [2023-08-31 22:08:48,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 118 transitions, 920 flow [2023-08-31 22:08:48,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 118 transitions, 912 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:08:48,783 INFO L231 Difference]: Finished difference. Result has 126 places, 102 transitions, 665 flow [2023-08-31 22:08:48,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=665, PETRI_PLACES=126, PETRI_TRANSITIONS=102} [2023-08-31 22:08:48,784 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -13 predicate places. [2023-08-31 22:08:48,784 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 102 transitions, 665 flow [2023-08-31 22:08:48,784 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 22:08:48,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:48,784 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 22:08:48,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-31 22:08:48,785 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:48,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:48,785 INFO L85 PathProgramCache]: Analyzing trace with hash -244183533, now seen corresponding path program 1 times [2023-08-31 22:08:48,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:48,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435618553] [2023-08-31 22:08:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:48,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:48,842 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 22:08:48,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:48,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435618553] [2023-08-31 22:08:48,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435618553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:48,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:48,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500531341] [2023-08-31 22:08:48,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:48,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:48,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:48,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:48,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 753 [2023-08-31 22:08:48,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 102 transitions, 665 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 22:08:48,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:48,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 753 [2023-08-31 22:08:48,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:49,347 INFO L130 PetriNetUnfolder]: 2397/4628 cut-off events. [2023-08-31 22:08:49,347 INFO L131 PetriNetUnfolder]: For 3805/3815 co-relation queries the response was YES. [2023-08-31 22:08:49,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11231 conditions, 4628 events. 2397/4628 cut-off events. For 3805/3815 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 26659 event pairs, 1151 based on Foata normal form. 8/4275 useless extension candidates. Maximal degree in co-relation 11200. Up to 2698 conditions per place. [2023-08-31 22:08:49,381 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 145 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2023-08-31 22:08:49,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 163 transitions, 1270 flow [2023-08-31 22:08:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-31 22:08:49,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718902169101372 [2023-08-31 22:08:49,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-31 22:08:49,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-31 22:08:49,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:49,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-31 22:08:49,385 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 22:08:49,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:49,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:49,387 INFO L175 Difference]: Start difference. First operand has 126 places, 102 transitions, 665 flow. Second operand 3 states and 1066 transitions. [2023-08-31 22:08:49,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 163 transitions, 1270 flow [2023-08-31 22:08:49,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 163 transitions, 1262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-31 22:08:49,398 INFO L231 Difference]: Finished difference. Result has 127 places, 103 transitions, 671 flow [2023-08-31 22:08:49,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=671, PETRI_PLACES=127, PETRI_TRANSITIONS=103} [2023-08-31 22:08:49,399 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -12 predicate places. [2023-08-31 22:08:49,399 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 103 transitions, 671 flow [2023-08-31 22:08:49,399 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 22:08:49,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:49,400 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 22:08:49,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-31 22:08:49,400 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:49,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:49,401 INFO L85 PathProgramCache]: Analyzing trace with hash 695068579, now seen corresponding path program 1 times [2023-08-31 22:08:49,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:49,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557007146] [2023-08-31 22:08:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:49,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:49,514 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 22:08:49,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:49,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557007146] [2023-08-31 22:08:49,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557007146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:49,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:49,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:08:49,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056638294] [2023-08-31 22:08:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:49,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 22:08:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 22:08:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 22:08:49,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 753 [2023-08-31 22:08:49,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 103 transitions, 671 flow. Second operand has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 22:08:49,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:49,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 753 [2023-08-31 22:08:49,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:49,916 INFO L130 PetriNetUnfolder]: 1960/3722 cut-off events. [2023-08-31 22:08:49,917 INFO L131 PetriNetUnfolder]: For 3360/3361 co-relation queries the response was YES. [2023-08-31 22:08:49,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10088 conditions, 3722 events. 1960/3722 cut-off events. For 3360/3361 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 19081 event pairs, 530 based on Foata normal form. 319/3868 useless extension candidates. Maximal degree in co-relation 10056. Up to 2491 conditions per place. [2023-08-31 22:08:49,941 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 95 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2023-08-31 22:08:49,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 116 transitions, 930 flow [2023-08-31 22:08:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 22:08:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 22:08:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-31 22:08:49,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-31 22:08:49,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-31 22:08:49,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-31 22:08:49,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:49,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-31 22:08:49,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 22:08:49,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:49,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 22:08:49,947 INFO L175 Difference]: Start difference. First operand has 127 places, 103 transitions, 671 flow. Second operand 3 states and 1021 transitions. [2023-08-31 22:08:49,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 116 transitions, 930 flow [2023-08-31 22:08:49,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 116 transitions, 926 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:08:49,955 INFO L231 Difference]: Finished difference. Result has 128 places, 103 transitions, 683 flow [2023-08-31 22:08:49,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=683, PETRI_PLACES=128, PETRI_TRANSITIONS=103} [2023-08-31 22:08:49,956 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -11 predicate places. [2023-08-31 22:08:49,956 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 103 transitions, 683 flow [2023-08-31 22:08:49,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 22:08:49,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:49,957 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 22:08:49,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-31 22:08:49,957 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 22:08:49,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:49,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1473818161, now seen corresponding path program 1 times [2023-08-31 22:08:49,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:49,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9701894] [2023-08-31 22:08:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:49,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:50,028 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 22:08:50,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:50,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9701894] [2023-08-31 22:08:50,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9701894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 22:08:50,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439755810] [2023-08-31 22:08:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:50,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:08:50,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 22:08:50,037 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 22:08:50,038 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 22:08:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:50,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-31 22:08:50,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 22:08:50,302 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 22:08:50,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 22:08:50,341 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 22:08:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439755810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 22:08:50,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 22:08:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-31 22:08:50,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497075893] [2023-08-31 22:08:50,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 22:08:50,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 22:08:50,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 22:08:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-31 22:08:50,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-31 22:08:50,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 103 transitions, 683 flow. Second operand has 7 states, 7 states have (on average 325.2857142857143) internal successors, (2277), 7 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states 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 22:08:50,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:50,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-31 22:08:50,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:51,151 INFO L130 PetriNetUnfolder]: 3027/6171 cut-off events. [2023-08-31 22:08:51,152 INFO L131 PetriNetUnfolder]: For 5511/5530 co-relation queries the response was YES. [2023-08-31 22:08:51,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16350 conditions, 6171 events. 3027/6171 cut-off events. For 5511/5530 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39119 event pairs, 446 based on Foata normal form. 509/6346 useless extension candidates. Maximal degree in co-relation 16318. Up to 1211 conditions per place. [2023-08-31 22:08:51,192 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 271 selfloop transitions, 6 changer transitions 0/293 dead transitions. [2023-08-31 22:08:51,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 293 transitions, 2116 flow [2023-08-31 22:08:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 22:08:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 22:08:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2149 transitions. [2023-08-31 22:08:51,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756529437804338 [2023-08-31 22:08:51,194 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2149 transitions. [2023-08-31 22:08:51,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2149 transitions. [2023-08-31 22:08:51,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:51,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2149 transitions. [2023-08-31 22:08:51,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 358.1666666666667) internal successors, (2149), 6 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states 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 22:08:51,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 22:08:51,200 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 22:08:51,200 INFO L175 Difference]: Start difference. First operand has 128 places, 103 transitions, 683 flow. Second operand 6 states and 2149 transitions. [2023-08-31 22:08:51,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 293 transitions, 2116 flow [2023-08-31 22:08:51,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 293 transitions, 2093 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 22:08:51,216 INFO L231 Difference]: Finished difference. Result has 136 places, 106 transitions, 717 flow [2023-08-31 22:08:51,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=717, PETRI_PLACES=136, PETRI_TRANSITIONS=106} [2023-08-31 22:08:51,216 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -3 predicate places. [2023-08-31 22:08:51,217 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 106 transitions, 717 flow [2023-08-31 22:08:51,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 325.2857142857143) internal successors, (2277), 7 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states 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 22:08:51,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:51,217 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 22:08:51,227 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 22:08:51,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 22:08:51,423 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 22:08:51,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:51,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1498115350, now seen corresponding path program 1 times [2023-08-31 22:08:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:51,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392146426] [2023-08-31 22:08:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:51,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:52,482 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 22:08:52,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:52,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392146426] [2023-08-31 22:08:52,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392146426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:52,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:52,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:08:52,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274924837] [2023-08-31 22:08:52,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:52,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:08:52,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:08:52,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:08:54,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 753 [2023-08-31 22:08:54,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 106 transitions, 717 flow. Second operand has 14 states, 14 states have (on average 279.07142857142856) internal successors, (3907), 14 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states 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 22:08:54,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:54,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 753 [2023-08-31 22:08:54,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:55,323 INFO L130 PetriNetUnfolder]: 3476/6756 cut-off events. [2023-08-31 22:08:55,323 INFO L131 PetriNetUnfolder]: For 11297/11329 co-relation queries the response was YES. [2023-08-31 22:08:55,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20321 conditions, 6756 events. 3476/6756 cut-off events. For 11297/11329 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 40935 event pairs, 1951 based on Foata normal form. 0/6395 useless extension candidates. Maximal degree in co-relation 20285. Up to 3716 conditions per place. [2023-08-31 22:08:55,352 INFO L137 encePairwiseOnDemand]: 735/753 looper letters, 196 selfloop transitions, 42 changer transitions 0/245 dead transitions. [2023-08-31 22:08:55,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 245 transitions, 2033 flow [2023-08-31 22:08:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:08:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:08:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4597 transitions. [2023-08-31 22:08:55,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815571049136786 [2023-08-31 22:08:55,358 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4597 transitions. [2023-08-31 22:08:55,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4597 transitions. [2023-08-31 22:08:55,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:55,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4597 transitions. [2023-08-31 22:08:55,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 287.3125) internal successors, (4597), 16 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states 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 22:08:55,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states 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 22:08:55,372 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states 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 22:08:55,372 INFO L175 Difference]: Start difference. First operand has 136 places, 106 transitions, 717 flow. Second operand 16 states and 4597 transitions. [2023-08-31 22:08:55,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 245 transitions, 2033 flow [2023-08-31 22:08:55,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 245 transitions, 1920 flow, removed 42 selfloop flow, removed 1 redundant places. [2023-08-31 22:08:55,397 INFO L231 Difference]: Finished difference. Result has 154 places, 119 transitions, 884 flow [2023-08-31 22:08:55,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=884, PETRI_PLACES=154, PETRI_TRANSITIONS=119} [2023-08-31 22:08:55,398 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 15 predicate places. [2023-08-31 22:08:55,398 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 119 transitions, 884 flow [2023-08-31 22:08:55,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 279.07142857142856) internal successors, (3907), 14 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states 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 22:08:55,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:55,399 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 22:08:55,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-31 22:08:55,399 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:08:55,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:55,400 INFO L85 PathProgramCache]: Analyzing trace with hash 682204528, now seen corresponding path program 2 times [2023-08-31 22:08:55,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:55,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210081595] [2023-08-31 22:08:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:55,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:08:56,317 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 22:08:56,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:08:56,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210081595] [2023-08-31 22:08:56,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210081595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:08:56,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:08:56,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:08:56,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513062181] [2023-08-31 22:08:56,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:08:56,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:08:56,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:08:56,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:08:56,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:08:58,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 753 [2023-08-31 22:08:58,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 119 transitions, 884 flow. Second operand has 14 states, 14 states have (on average 275.07142857142856) internal successors, (3851), 14 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states 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 22:08:58,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:08:58,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 753 [2023-08-31 22:08:58,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:08:59,162 INFO L130 PetriNetUnfolder]: 3403/6717 cut-off events. [2023-08-31 22:08:59,162 INFO L131 PetriNetUnfolder]: For 10166/10182 co-relation queries the response was YES. [2023-08-31 22:08:59,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20383 conditions, 6717 events. 3403/6717 cut-off events. For 10166/10182 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 41076 event pairs, 1005 based on Foata normal form. 23/6432 useless extension candidates. Maximal degree in co-relation 20342. Up to 2800 conditions per place. [2023-08-31 22:08:59,199 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 194 selfloop transitions, 48 changer transitions 0/249 dead transitions. [2023-08-31 22:08:59,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 249 transitions, 2068 flow [2023-08-31 22:08:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 22:08:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 22:08:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4803 transitions. [2023-08-31 22:08:59,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3752050621045231 [2023-08-31 22:08:59,202 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4803 transitions. [2023-08-31 22:08:59,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4803 transitions. [2023-08-31 22:08:59,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:08:59,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4803 transitions. [2023-08-31 22:08:59,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 282.52941176470586) internal successors, (4803), 17 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states 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 22:08:59,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 753.0) internal successors, (13554), 18 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states 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 22:08:59,216 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 753.0) internal successors, (13554), 18 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states 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 22:08:59,217 INFO L175 Difference]: Start difference. First operand has 154 places, 119 transitions, 884 flow. Second operand 17 states and 4803 transitions. [2023-08-31 22:08:59,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 249 transitions, 2068 flow [2023-08-31 22:08:59,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 249 transitions, 1977 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-31 22:08:59,245 INFO L231 Difference]: Finished difference. Result has 164 places, 125 transitions, 960 flow [2023-08-31 22:08:59,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=960, PETRI_PLACES=164, PETRI_TRANSITIONS=125} [2023-08-31 22:08:59,245 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 25 predicate places. [2023-08-31 22:08:59,245 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 125 transitions, 960 flow [2023-08-31 22:08:59,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.07142857142856) internal successors, (3851), 14 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states 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 22:08:59,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:08:59,246 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 22:08:59,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-31 22:08:59,246 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 22:08:59,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:08:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1905397562, now seen corresponding path program 3 times [2023-08-31 22:08:59,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:08:59,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001891406] [2023-08-31 22:08:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:08:59,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:08:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:01,153 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 22:09:01,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:01,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001891406] [2023-08-31 22:09:01,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001891406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:01,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:01,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:09:01,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203181572] [2023-08-31 22:09:01,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:01,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:09:01,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:01,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:09:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:09:04,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 753 [2023-08-31 22:09:04,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 125 transitions, 960 flow. Second operand has 16 states, 16 states have (on average 261.8125) internal successors, (4189), 16 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states 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 22:09:04,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:04,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 753 [2023-08-31 22:09:04,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:06,567 INFO L130 PetriNetUnfolder]: 4588/8922 cut-off events. [2023-08-31 22:09:06,567 INFO L131 PetriNetUnfolder]: For 11528/11552 co-relation queries the response was YES. [2023-08-31 22:09:06,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26619 conditions, 8922 events. 4588/8922 cut-off events. For 11528/11552 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 57396 event pairs, 1133 based on Foata normal form. 0/8605 useless extension candidates. Maximal degree in co-relation 26574. Up to 2776 conditions per place. [2023-08-31 22:09:06,619 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 219 selfloop transitions, 41 changer transitions 0/267 dead transitions. [2023-08-31 22:09:06,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 267 transitions, 2158 flow [2023-08-31 22:09:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:09:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:09:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3820 transitions. [2023-08-31 22:09:06,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623600834756213 [2023-08-31 22:09:06,623 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3820 transitions. [2023-08-31 22:09:06,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3820 transitions. [2023-08-31 22:09:06,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:06,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3820 transitions. [2023-08-31 22:09:06,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 272.85714285714283) internal successors, (3820), 14 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states 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 22:09:06,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states 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 22:09:06,635 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states 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 22:09:06,635 INFO L175 Difference]: Start difference. First operand has 164 places, 125 transitions, 960 flow. Second operand 14 states and 3820 transitions. [2023-08-31 22:09:06,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 267 transitions, 2158 flow [2023-08-31 22:09:06,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 267 transitions, 2097 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-31 22:09:06,672 INFO L231 Difference]: Finished difference. Result has 171 places, 132 transitions, 1060 flow [2023-08-31 22:09:06,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1060, PETRI_PLACES=171, PETRI_TRANSITIONS=132} [2023-08-31 22:09:06,673 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 32 predicate places. [2023-08-31 22:09:06,673 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 132 transitions, 1060 flow [2023-08-31 22:09:06,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 261.8125) internal successors, (4189), 16 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states 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 22:09:06,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:06,674 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 22:09:06,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-31 22:09:06,674 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 22:09:06,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:06,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1727020662, now seen corresponding path program 1 times [2023-08-31 22:09:06,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:06,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625880447] [2023-08-31 22:09:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:06,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:08,067 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 22:09:08,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:08,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625880447] [2023-08-31 22:09:08,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625880447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:08,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:08,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-31 22:09:08,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10328107] [2023-08-31 22:09:08,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:08,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 22:09:08,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:08,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 22:09:08,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-08-31 22:09:10,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 753 [2023-08-31 22:09:10,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 132 transitions, 1060 flow. Second operand has 16 states, 16 states have (on average 263.875) internal successors, (4222), 16 states have internal predecessors, (4222), 0 states have call successors, (0), 0 states 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 22:09:10,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:10,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 753 [2023-08-31 22:09:10,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:11,660 INFO L130 PetriNetUnfolder]: 4844/9432 cut-off events. [2023-08-31 22:09:11,660 INFO L131 PetriNetUnfolder]: For 13537/13592 co-relation queries the response was YES. [2023-08-31 22:09:11,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28840 conditions, 9432 events. 4844/9432 cut-off events. For 13537/13592 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 59429 event pairs, 1193 based on Foata normal form. 163/9428 useless extension candidates. Maximal degree in co-relation 28790. Up to 2674 conditions per place. [2023-08-31 22:09:11,713 INFO L137 encePairwiseOnDemand]: 736/753 looper letters, 213 selfloop transitions, 39 changer transitions 0/259 dead transitions. [2023-08-31 22:09:11,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 259 transitions, 2171 flow [2023-08-31 22:09:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-31 22:09:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-31 22:09:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3836 transitions. [2023-08-31 22:09:11,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36387782204515273 [2023-08-31 22:09:11,716 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3836 transitions. [2023-08-31 22:09:11,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3836 transitions. [2023-08-31 22:09:11,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:11,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3836 transitions. [2023-08-31 22:09:11,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 22:09:11,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states 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 22:09:11,727 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states 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 22:09:11,727 INFO L175 Difference]: Start difference. First operand has 171 places, 132 transitions, 1060 flow. Second operand 14 states and 3836 transitions. [2023-08-31 22:09:11,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 259 transitions, 2171 flow [2023-08-31 22:09:11,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 259 transitions, 2122 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-31 22:09:11,770 INFO L231 Difference]: Finished difference. Result has 179 places, 135 transitions, 1130 flow [2023-08-31 22:09:11,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1130, PETRI_PLACES=179, PETRI_TRANSITIONS=135} [2023-08-31 22:09:11,771 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 40 predicate places. [2023-08-31 22:09:11,771 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 135 transitions, 1130 flow [2023-08-31 22:09:11,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 263.875) internal successors, (4222), 16 states have internal predecessors, (4222), 0 states have call successors, (0), 0 states 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 22:09:11,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:11,772 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, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:11,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-31 22:09:11,773 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:11,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash -485973527, now seen corresponding path program 1 times [2023-08-31 22:09:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:11,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528767276] [2023-08-31 22:09:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:11,865 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 22:09:11,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:11,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528767276] [2023-08-31 22:09:11,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528767276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:11,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:11,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 22:09:11,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789777788] [2023-08-31 22:09:11,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:11,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 22:09:11,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:11,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 22:09:11,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-31 22:09:12,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 753 [2023-08-31 22:09:12,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 135 transitions, 1130 flow. Second operand has 5 states, 5 states have (on average 321.8) internal successors, (1609), 5 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states 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 22:09:12,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:12,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 753 [2023-08-31 22:09:12,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:13,033 INFO L130 PetriNetUnfolder]: 4642/9147 cut-off events. [2023-08-31 22:09:13,034 INFO L131 PetriNetUnfolder]: For 16056/16178 co-relation queries the response was YES. [2023-08-31 22:09:13,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28594 conditions, 9147 events. 4642/9147 cut-off events. For 16056/16178 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 58210 event pairs, 3043 based on Foata normal form. 84/9032 useless extension candidates. Maximal degree in co-relation 28541. Up to 6837 conditions per place. [2023-08-31 22:09:13,079 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 190 selfloop transitions, 3 changer transitions 0/209 dead transitions. [2023-08-31 22:09:13,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 209 transitions, 2092 flow [2023-08-31 22:09:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 22:09:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 22:09:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1359 transitions. [2023-08-31 22:09:13,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45119521912350596 [2023-08-31 22:09:13,082 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1359 transitions. [2023-08-31 22:09:13,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1359 transitions. [2023-08-31 22:09:13,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:13,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1359 transitions. [2023-08-31 22:09:13,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.75) internal successors, (1359), 4 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states 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 22:09:13,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:09:13,086 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 22:09:13,086 INFO L175 Difference]: Start difference. First operand has 179 places, 135 transitions, 1130 flow. Second operand 4 states and 1359 transitions. [2023-08-31 22:09:13,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 209 transitions, 2092 flow [2023-08-31 22:09:13,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 209 transitions, 1962 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-31 22:09:13,127 INFO L231 Difference]: Finished difference. Result has 172 places, 135 transitions, 1061 flow [2023-08-31 22:09:13,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1061, PETRI_PLACES=172, PETRI_TRANSITIONS=135} [2023-08-31 22:09:13,128 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 33 predicate places. [2023-08-31 22:09:13,128 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 135 transitions, 1061 flow [2023-08-31 22:09:13,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 321.8) internal successors, (1609), 5 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states 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 22:09:13,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:13,129 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, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:13,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-31 22:09:13,129 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:13,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1794439543, now seen corresponding path program 1 times [2023-08-31 22:09:13,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:13,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848190999] [2023-08-31 22:09:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:13,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:14,245 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 22:09:14,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848190999] [2023-08-31 22:09:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848190999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:14,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:14,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:09:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011007090] [2023-08-31 22:09:14,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:14,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:09:14,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:09:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:09:16,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 753 [2023-08-31 22:09:16,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 135 transitions, 1061 flow. Second operand has 14 states, 14 states have (on average 275.57142857142856) internal successors, (3858), 14 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states 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 22:09:16,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:16,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 753 [2023-08-31 22:09:16,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:17,360 INFO L130 PetriNetUnfolder]: 4829/9431 cut-off events. [2023-08-31 22:09:17,361 INFO L131 PetriNetUnfolder]: For 15705/15735 co-relation queries the response was YES. [2023-08-31 22:09:17,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29724 conditions, 9431 events. 4829/9431 cut-off events. For 15705/15735 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 60130 event pairs, 2067 based on Foata normal form. 5/9270 useless extension candidates. Maximal degree in co-relation 29671. Up to 5227 conditions per place. [2023-08-31 22:09:17,429 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 205 selfloop transitions, 50 changer transitions 0/262 dead transitions. [2023-08-31 22:09:17,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 262 transitions, 2346 flow [2023-08-31 22:09:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 22:09:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 22:09:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4529 transitions. [2023-08-31 22:09:17,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37591301460823373 [2023-08-31 22:09:17,433 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4529 transitions. [2023-08-31 22:09:17,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4529 transitions. [2023-08-31 22:09:17,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:17,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4529 transitions. [2023-08-31 22:09:17,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 283.0625) internal successors, (4529), 16 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states 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 22:09:17,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states 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 22:09:17,445 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states 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 22:09:17,445 INFO L175 Difference]: Start difference. First operand has 172 places, 135 transitions, 1061 flow. Second operand 16 states and 4529 transitions. [2023-08-31 22:09:17,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 262 transitions, 2346 flow [2023-08-31 22:09:17,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 262 transitions, 2286 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-31 22:09:17,507 INFO L231 Difference]: Finished difference. Result has 186 places, 138 transitions, 1206 flow [2023-08-31 22:09:17,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1206, PETRI_PLACES=186, PETRI_TRANSITIONS=138} [2023-08-31 22:09:17,508 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 47 predicate places. [2023-08-31 22:09:17,508 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 138 transitions, 1206 flow [2023-08-31 22:09:17,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.57142857142856) internal successors, (3858), 14 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states 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 22:09:17,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:17,509 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, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:17,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-31 22:09:17,510 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:17,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:17,510 INFO L85 PathProgramCache]: Analyzing trace with hash -64428823, now seen corresponding path program 2 times [2023-08-31 22:09:17,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:17,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530889100] [2023-08-31 22:09:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:17,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:18,777 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 22:09:18,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:18,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530889100] [2023-08-31 22:09:18,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530889100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:18,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:18,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-31 22:09:18,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8516192] [2023-08-31 22:09:18,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:18,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 22:09:18,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 22:09:18,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-31 22:09:21,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 753 [2023-08-31 22:09:21,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 138 transitions, 1206 flow. Second operand has 14 states, 14 states have (on average 275.57142857142856) internal successors, (3858), 14 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states 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 22:09:21,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:21,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 753 [2023-08-31 22:09:21,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:23,095 INFO L130 PetriNetUnfolder]: 4209/8268 cut-off events. [2023-08-31 22:09:23,095 INFO L131 PetriNetUnfolder]: For 14627/14658 co-relation queries the response was YES. [2023-08-31 22:09:23,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27052 conditions, 8268 events. 4209/8268 cut-off events. For 14627/14658 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 50799 event pairs, 1521 based on Foata normal form. 6/8118 useless extension candidates. Maximal degree in co-relation 26997. Up to 4194 conditions per place. [2023-08-31 22:09:23,152 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 210 selfloop transitions, 55 changer transitions 0/272 dead transitions. [2023-08-31 22:09:23,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 272 transitions, 2500 flow [2023-08-31 22:09:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 22:09:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 22:09:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4806 transitions. [2023-08-31 22:09:23,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754394187954066 [2023-08-31 22:09:23,157 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4806 transitions. [2023-08-31 22:09:23,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4806 transitions. [2023-08-31 22:09:23,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:23,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4806 transitions. [2023-08-31 22:09:23,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 282.70588235294116) internal successors, (4806), 17 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states 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 22:09:23,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 753.0) internal successors, (13554), 18 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states 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 22:09:23,167 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 753.0) internal successors, (13554), 18 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states 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 22:09:23,167 INFO L175 Difference]: Start difference. First operand has 186 places, 138 transitions, 1206 flow. Second operand 17 states and 4806 transitions. [2023-08-31 22:09:23,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 272 transitions, 2500 flow [2023-08-31 22:09:23,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 272 transitions, 2436 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-31 22:09:23,209 INFO L231 Difference]: Finished difference. Result has 192 places, 137 transitions, 1275 flow [2023-08-31 22:09:23,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1275, PETRI_PLACES=192, PETRI_TRANSITIONS=137} [2023-08-31 22:09:23,209 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 53 predicate places. [2023-08-31 22:09:23,209 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 137 transitions, 1275 flow [2023-08-31 22:09:23,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.57142857142856) internal successors, (3858), 14 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states 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 22:09:23,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:23,210 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:23,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-31 22:09:23,211 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:23,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:23,211 INFO L85 PathProgramCache]: Analyzing trace with hash 437960755, now seen corresponding path program 1 times [2023-08-31 22:09:23,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:23,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803473422] [2023-08-31 22:09:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:23,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:25,863 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 22:09:25,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:25,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803473422] [2023-08-31 22:09:25,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803473422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:25,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:25,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-31 22:09:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271501670] [2023-08-31 22:09:25,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:25,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 22:09:25,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:25,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 22:09:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2023-08-31 22:09:33,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-31 22:09:33,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 137 transitions, 1275 flow. Second operand has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 22:09:33,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:33,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-31 22:09:33,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:36,203 INFO L130 PetriNetUnfolder]: 4561/8948 cut-off events. [2023-08-31 22:09:36,203 INFO L131 PetriNetUnfolder]: For 17670/17698 co-relation queries the response was YES. [2023-08-31 22:09:36,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29771 conditions, 8948 events. 4561/8948 cut-off events. For 17670/17698 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 55845 event pairs, 2113 based on Foata normal form. 0/8786 useless extension candidates. Maximal degree in co-relation 29714. Up to 7498 conditions per place. [2023-08-31 22:09:36,253 INFO L137 encePairwiseOnDemand]: 728/753 looper letters, 229 selfloop transitions, 65 changer transitions 0/301 dead transitions. [2023-08-31 22:09:36,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 301 transitions, 2719 flow [2023-08-31 22:09:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 22:09:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 22:09:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7984 transitions. [2023-08-31 22:09:36,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3534307215582116 [2023-08-31 22:09:36,262 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7984 transitions. [2023-08-31 22:09:36,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7984 transitions. [2023-08-31 22:09:36,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:36,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7984 transitions. [2023-08-31 22:09:36,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 266.1333333333333) internal successors, (7984), 30 states have internal predecessors, (7984), 0 states have call successors, (0), 0 states 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 22:09:36,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 22:09:36,285 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 22:09:36,285 INFO L175 Difference]: Start difference. First operand has 192 places, 137 transitions, 1275 flow. Second operand 30 states and 7984 transitions. [2023-08-31 22:09:36,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 301 transitions, 2719 flow [2023-08-31 22:09:36,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 301 transitions, 2573 flow, removed 1 selfloop flow, removed 14 redundant places. [2023-08-31 22:09:36,344 INFO L231 Difference]: Finished difference. Result has 221 places, 201 transitions, 1857 flow [2023-08-31 22:09:36,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1857, PETRI_PLACES=221, PETRI_TRANSITIONS=201} [2023-08-31 22:09:36,346 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 82 predicate places. [2023-08-31 22:09:36,346 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 201 transitions, 1857 flow [2023-08-31 22:09:36,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 22:09:36,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:36,348 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:36,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-31 22:09:36,348 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:36,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1588328903, now seen corresponding path program 2 times [2023-08-31 22:09:36,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:36,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394702441] [2023-08-31 22:09:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:36,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:38,797 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 22:09:38,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:38,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394702441] [2023-08-31 22:09:38,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394702441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:38,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:38,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-31 22:09:38,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25420849] [2023-08-31 22:09:38,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:38,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 22:09:38,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:38,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 22:09:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-08-31 22:09:47,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-31 22:09:47,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 201 transitions, 1857 flow. Second operand has 23 states, 23 states have (on average 258.60869565217394) internal successors, (5948), 23 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states 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 22:09:47,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:09:47,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-31 22:09:47,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:09:50,752 INFO L130 PetriNetUnfolder]: 4855/9500 cut-off events. [2023-08-31 22:09:50,752 INFO L131 PetriNetUnfolder]: For 22566/22626 co-relation queries the response was YES. [2023-08-31 22:09:50,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33515 conditions, 9500 events. 4855/9500 cut-off events. For 22566/22626 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 60166 event pairs, 2372 based on Foata normal form. 10/9470 useless extension candidates. Maximal degree in co-relation 33444. Up to 7834 conditions per place. [2023-08-31 22:09:50,817 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 276 selfloop transitions, 64 changer transitions 0/347 dead transitions. [2023-08-31 22:09:50,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 347 transitions, 3384 flow [2023-08-31 22:09:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 22:09:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 22:09:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7126 transitions. [2023-08-31 22:09:50,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3504992376174315 [2023-08-31 22:09:50,822 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7126 transitions. [2023-08-31 22:09:50,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7126 transitions. [2023-08-31 22:09:50,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:09:50,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7126 transitions. [2023-08-31 22:09:50,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 263.9259259259259) internal successors, (7126), 27 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states 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 22:09:50,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 753.0) internal successors, (21084), 28 states have internal predecessors, (21084), 0 states have call successors, (0), 0 states 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 22:09:50,836 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 753.0) internal successors, (21084), 28 states have internal predecessors, (21084), 0 states have call successors, (0), 0 states 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 22:09:50,836 INFO L175 Difference]: Start difference. First operand has 221 places, 201 transitions, 1857 flow. Second operand 27 states and 7126 transitions. [2023-08-31 22:09:50,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 347 transitions, 3384 flow [2023-08-31 22:09:50,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 347 transitions, 3350 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-08-31 22:09:50,899 INFO L231 Difference]: Finished difference. Result has 261 places, 248 transitions, 2501 flow [2023-08-31 22:09:50,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2501, PETRI_PLACES=261, PETRI_TRANSITIONS=248} [2023-08-31 22:09:50,900 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 122 predicate places. [2023-08-31 22:09:50,900 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 248 transitions, 2501 flow [2023-08-31 22:09:50,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 258.60869565217394) internal successors, (5948), 23 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states 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 22:09:50,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:09:50,901 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:09:50,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-31 22:09:50,901 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:09:50,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:09:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 975787803, now seen corresponding path program 3 times [2023-08-31 22:09:50,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:09:50,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122495990] [2023-08-31 22:09:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:09:50,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:09:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:09:53,319 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 22:09:53,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:09:53,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122495990] [2023-08-31 22:09:53,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122495990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:09:53,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:09:53,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-08-31 22:09:53,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565032319] [2023-08-31 22:09:53,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:09:53,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 22:09:53,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:09:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 22:09:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-08-31 22:10:01,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 753 [2023-08-31 22:10:01,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 248 transitions, 2501 flow. Second operand has 22 states, 22 states have (on average 262.6818181818182) internal successors, (5779), 22 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states 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 22:10:01,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:10:01,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 753 [2023-08-31 22:10:01,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:10:04,881 INFO L130 PetriNetUnfolder]: 5128/10105 cut-off events. [2023-08-31 22:10:04,881 INFO L131 PetriNetUnfolder]: For 29297/29387 co-relation queries the response was YES. [2023-08-31 22:10:04,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38051 conditions, 10105 events. 5128/10105 cut-off events. For 29297/29387 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 65240 event pairs, 1971 based on Foata normal form. 10/10087 useless extension candidates. Maximal degree in co-relation 37966. Up to 8101 conditions per place. [2023-08-31 22:10:04,965 INFO L137 encePairwiseOnDemand]: 729/753 looper letters, 322 selfloop transitions, 92 changer transitions 0/421 dead transitions. [2023-08-31 22:10:04,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 421 transitions, 4417 flow [2023-08-31 22:10:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-31 22:10:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-31 22:10:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 8308 transitions. [2023-08-31 22:10:04,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3559096945551129 [2023-08-31 22:10:04,971 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 8308 transitions. [2023-08-31 22:10:04,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 8308 transitions. [2023-08-31 22:10:04,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:10:04,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 8308 transitions. [2023-08-31 22:10:04,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 268.0) internal successors, (8308), 31 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states 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 22:10:04,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 753.0) internal successors, (24096), 32 states have internal predecessors, (24096), 0 states have call successors, (0), 0 states 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 22:10:04,993 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 753.0) internal successors, (24096), 32 states have internal predecessors, (24096), 0 states have call successors, (0), 0 states 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 22:10:04,994 INFO L175 Difference]: Start difference. First operand has 261 places, 248 transitions, 2501 flow. Second operand 31 states and 8308 transitions. [2023-08-31 22:10:04,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 421 transitions, 4417 flow [2023-08-31 22:10:05,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 421 transitions, 4343 flow, removed 35 selfloop flow, removed 1 redundant places. [2023-08-31 22:10:05,079 INFO L231 Difference]: Finished difference. Result has 301 places, 303 transitions, 3297 flow [2023-08-31 22:10:05,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3297, PETRI_PLACES=301, PETRI_TRANSITIONS=303} [2023-08-31 22:10:05,080 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 162 predicate places. [2023-08-31 22:10:05,080 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 303 transitions, 3297 flow [2023-08-31 22:10:05,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 262.6818181818182) internal successors, (5779), 22 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states 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 22:10:05,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:10:05,081 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:10:05,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-31 22:10:05,081 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:10:05,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:10:05,081 INFO L85 PathProgramCache]: Analyzing trace with hash 948622371, now seen corresponding path program 4 times [2023-08-31 22:10:05,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:10:05,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525729201] [2023-08-31 22:10:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:10:05,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:10:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:10:13,963 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 22:10:13,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:10:13,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525729201] [2023-08-31 22:10:13,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525729201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:10:13,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:10:13,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-08-31 22:10:13,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807832373] [2023-08-31 22:10:13,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:10:13,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 22:10:13,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:10:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 22:10:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-08-31 22:11:09,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-31 22:11:09,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 303 transitions, 3297 flow. Second operand has 24 states, 24 states have (on average 258.5416666666667) internal successors, (6205), 24 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 22:11:09,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:11:09,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-31 22:11:09,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:11:35,926 INFO L130 PetriNetUnfolder]: 5388/10605 cut-off events. [2023-08-31 22:11:35,927 INFO L131 PetriNetUnfolder]: For 37799/37929 co-relation queries the response was YES. [2023-08-31 22:11:35,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42553 conditions, 10605 events. 5388/10605 cut-off events. For 37799/37929 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 69267 event pairs, 2183 based on Foata normal form. 10/10587 useless extension candidates. Maximal degree in co-relation 42456. Up to 9079 conditions per place. [2023-08-31 22:11:36,012 INFO L137 encePairwiseOnDemand]: 726/753 looper letters, 372 selfloop transitions, 59 changer transitions 0/438 dead transitions. [2023-08-31 22:11:36,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 438 transitions, 5093 flow [2023-08-31 22:11:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 22:11:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 22:11:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 7382 transitions. [2023-08-31 22:11:36,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3501233162587744 [2023-08-31 22:11:36,021 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 7382 transitions. [2023-08-31 22:11:36,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 7382 transitions. [2023-08-31 22:11:36,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:11:36,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 7382 transitions. [2023-08-31 22:11:36,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 263.64285714285717) internal successors, (7382), 28 states have internal predecessors, (7382), 0 states have call successors, (0), 0 states 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 22:11:36,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 753.0) internal successors, (21837), 29 states have internal predecessors, (21837), 0 states have call successors, (0), 0 states 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 22:11:36,043 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 753.0) internal successors, (21837), 29 states have internal predecessors, (21837), 0 states have call successors, (0), 0 states 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 22:11:36,043 INFO L175 Difference]: Start difference. First operand has 301 places, 303 transitions, 3297 flow. Second operand 28 states and 7382 transitions. [2023-08-31 22:11:36,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 438 transitions, 5093 flow [2023-08-31 22:11:36,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 438 transitions, 4851 flow, removed 95 selfloop flow, removed 4 redundant places. [2023-08-31 22:11:36,185 INFO L231 Difference]: Finished difference. Result has 340 places, 353 transitions, 3864 flow [2023-08-31 22:11:36,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=3061, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3864, PETRI_PLACES=340, PETRI_TRANSITIONS=353} [2023-08-31 22:11:36,186 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 201 predicate places. [2023-08-31 22:11:36,186 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 353 transitions, 3864 flow [2023-08-31 22:11:36,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 258.5416666666667) internal successors, (6205), 24 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 22:11:36,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:11:36,187 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:11:36,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-31 22:11:36,187 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:11:36,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:11:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash -273683617, now seen corresponding path program 5 times [2023-08-31 22:11:36,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:11:36,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376361314] [2023-08-31 22:11:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:11:36,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:11:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:11:39,366 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 22:11:39,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:11:39,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376361314] [2023-08-31 22:11:39,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376361314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:11:39,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:11:39,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-08-31 22:11:39,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231141877] [2023-08-31 22:11:39,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:11:39,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 22:11:39,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:11:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 22:11:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-31 22:12:09,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-31 22:12:09,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 353 transitions, 3864 flow. Second operand has 24 states, 24 states have (on average 260.5416666666667) internal successors, (6253), 24 states have internal predecessors, (6253), 0 states have call successors, (0), 0 states 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 22:12:09,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:12:09,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-31 22:12:09,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:12:15,554 INFO L130 PetriNetUnfolder]: 5696/11222 cut-off events. [2023-08-31 22:12:15,554 INFO L131 PetriNetUnfolder]: For 46917/47093 co-relation queries the response was YES. [2023-08-31 22:12:15,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47451 conditions, 11222 events. 5696/11222 cut-off events. For 46917/47093 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 74481 event pairs, 2208 based on Foata normal form. 10/11204 useless extension candidates. Maximal degree in co-relation 47337. Up to 9178 conditions per place. [2023-08-31 22:12:15,650 INFO L137 encePairwiseOnDemand]: 728/753 looper letters, 430 selfloop transitions, 92 changer transitions 0/529 dead transitions. [2023-08-31 22:12:15,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 529 transitions, 6202 flow [2023-08-31 22:12:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 22:12:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 22:12:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7991 transitions. [2023-08-31 22:12:15,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374059318282425 [2023-08-31 22:12:15,657 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7991 transitions. [2023-08-31 22:12:15,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7991 transitions. [2023-08-31 22:12:15,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:12:15,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7991 transitions. [2023-08-31 22:12:15,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 266.3666666666667) internal successors, (7991), 30 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states 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 22:12:15,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 22:12:15,681 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 22:12:15,682 INFO L175 Difference]: Start difference. First operand has 340 places, 353 transitions, 3864 flow. Second operand 30 states and 7991 transitions. [2023-08-31 22:12:15,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 529 transitions, 6202 flow [2023-08-31 22:12:15,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 529 transitions, 5944 flow, removed 122 selfloop flow, removed 2 redundant places. [2023-08-31 22:12:15,853 INFO L231 Difference]: Finished difference. Result has 379 places, 404 transitions, 4605 flow [2023-08-31 22:12:15,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4605, PETRI_PLACES=379, PETRI_TRANSITIONS=404} [2023-08-31 22:12:15,854 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 240 predicate places. [2023-08-31 22:12:15,854 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 404 transitions, 4605 flow [2023-08-31 22:12:15,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 260.5416666666667) internal successors, (6253), 24 states have internal predecessors, (6253), 0 states have call successors, (0), 0 states 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 22:12:15,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:12:15,855 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:12:15,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-31 22:12:15,855 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:12:15,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:12:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash -804456605, now seen corresponding path program 6 times [2023-08-31 22:12:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:12:15,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578089020] [2023-08-31 22:12:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:12:15,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:12:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:12:39,495 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 22:12:39,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:12:39,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578089020] [2023-08-31 22:12:39,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578089020] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:12:39,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:12:39,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-08-31 22:12:39,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352202690] [2023-08-31 22:12:39,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:12:39,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 22:12:39,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:12:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 22:12:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2023-08-31 22:14:08,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-31 22:14:08,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 404 transitions, 4605 flow. Second operand has 24 states, 24 states have (on average 258.5416666666667) internal successors, (6205), 24 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 22:14:08,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:14:08,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-31 22:14:08,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:14:31,715 INFO L130 PetriNetUnfolder]: 6447/12738 cut-off events. [2023-08-31 22:14:31,715 INFO L131 PetriNetUnfolder]: For 65295/65507 co-relation queries the response was YES. [2023-08-31 22:14:31,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56406 conditions, 12738 events. 6447/12738 cut-off events. For 65295/65507 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 87934 event pairs, 2442 based on Foata normal form. 24/12728 useless extension candidates. Maximal degree in co-relation 56280. Up to 8946 conditions per place. [2023-08-31 22:14:31,839 INFO L137 encePairwiseOnDemand]: 725/753 looper letters, 506 selfloop transitions, 127 changer transitions 0/640 dead transitions. [2023-08-31 22:14:31,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 640 transitions, 7884 flow [2023-08-31 22:14:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-31 22:14:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-31 22:14:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 8745 transitions. [2023-08-31 22:14:31,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.351925630810093 [2023-08-31 22:14:31,844 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 8745 transitions. [2023-08-31 22:14:31,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 8745 transitions. [2023-08-31 22:14:31,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:14:31,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 8745 transitions. [2023-08-31 22:14:31,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 265.0) internal successors, (8745), 33 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states 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 22:14:31,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 753.0) internal successors, (25602), 34 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states 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 22:14:31,861 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 753.0) internal successors, (25602), 34 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states 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 22:14:31,861 INFO L175 Difference]: Start difference. First operand has 379 places, 404 transitions, 4605 flow. Second operand 33 states and 8745 transitions. [2023-08-31 22:14:31,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 640 transitions, 7884 flow [2023-08-31 22:14:32,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 640 transitions, 7496 flow, removed 169 selfloop flow, removed 4 redundant places. [2023-08-31 22:14:32,116 INFO L231 Difference]: Finished difference. Result has 425 places, 468 transitions, 5650 flow [2023-08-31 22:14:32,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=4217, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5650, PETRI_PLACES=425, PETRI_TRANSITIONS=468} [2023-08-31 22:14:32,116 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 286 predicate places. [2023-08-31 22:14:32,117 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 468 transitions, 5650 flow [2023-08-31 22:14:32,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 258.5416666666667) internal successors, (6205), 24 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 22:14:32,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:14:32,118 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:14:32,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-31 22:14:32,118 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:14:32,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:14:32,118 INFO L85 PathProgramCache]: Analyzing trace with hash -276091999, now seen corresponding path program 7 times [2023-08-31 22:14:32,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:14:32,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138897966] [2023-08-31 22:14:32,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:14:32,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:14:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:14:34,293 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 22:14:34,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:14:34,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138897966] [2023-08-31 22:14:34,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138897966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:14:34,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:14:34,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-31 22:14:34,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049116051] [2023-08-31 22:14:34,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:14:34,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 22:14:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:14:34,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 22:14:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-08-31 22:14:41,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-31 22:14:41,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 468 transitions, 5650 flow. Second operand has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 22:14:41,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:14:41,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-31 22:14:41,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:14:46,038 INFO L130 PetriNetUnfolder]: 6933/13752 cut-off events. [2023-08-31 22:14:46,038 INFO L131 PetriNetUnfolder]: For 103234/103460 co-relation queries the response was YES. [2023-08-31 22:14:46,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66018 conditions, 13752 events. 6933/13752 cut-off events. For 103234/103460 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 97179 event pairs, 2202 based on Foata normal form. 46/13764 useless extension candidates. Maximal degree in co-relation 65874. Up to 8268 conditions per place. [2023-08-31 22:14:46,233 INFO L137 encePairwiseOnDemand]: 728/753 looper letters, 531 selfloop transitions, 137 changer transitions 0/675 dead transitions. [2023-08-31 22:14:46,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 675 transitions, 8944 flow [2023-08-31 22:14:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 22:14:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 22:14:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8016 transitions. [2023-08-31 22:14:46,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548472775564409 [2023-08-31 22:14:46,239 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8016 transitions. [2023-08-31 22:14:46,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8016 transitions. [2023-08-31 22:14:46,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:14:46,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8016 transitions. [2023-08-31 22:14:46,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 267.2) internal successors, (8016), 30 states have internal predecessors, (8016), 0 states have call successors, (0), 0 states 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 22:14:46,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 22:14:46,253 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 22:14:46,253 INFO L175 Difference]: Start difference. First operand has 425 places, 468 transitions, 5650 flow. Second operand 30 states and 8016 transitions. [2023-08-31 22:14:46,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 675 transitions, 8944 flow [2023-08-31 22:14:46,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 675 transitions, 8352 flow, removed 256 selfloop flow, removed 6 redundant places. [2023-08-31 22:14:46,820 INFO L231 Difference]: Finished difference. Result has 466 places, 522 transitions, 6570 flow [2023-08-31 22:14:46,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=5106, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6570, PETRI_PLACES=466, PETRI_TRANSITIONS=522} [2023-08-31 22:14:46,821 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 327 predicate places. [2023-08-31 22:14:46,821 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 522 transitions, 6570 flow [2023-08-31 22:14:46,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 22:14:46,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:14:46,822 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:14:46,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-31 22:14:46,822 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:14:46,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:14:46,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1241226753, now seen corresponding path program 8 times [2023-08-31 22:14:46,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:14:46,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223539779] [2023-08-31 22:14:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:14:46,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:14:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:14:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 22:14:48,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:14:48,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223539779] [2023-08-31 22:14:48,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223539779] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:14:48,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:14:48,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-31 22:14:48,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411348606] [2023-08-31 22:14:48,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:14:48,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 22:14:48,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:14:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 22:14:48,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-08-31 22:14:56,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-31 22:14:56,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 522 transitions, 6570 flow. Second operand has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 22:14:56,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:14:56,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-31 22:14:56,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:15:02,313 INFO L130 PetriNetUnfolder]: 7280/14471 cut-off events. [2023-08-31 22:15:02,313 INFO L131 PetriNetUnfolder]: For 165946/166291 co-relation queries the response was YES. [2023-08-31 22:15:02,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75501 conditions, 14471 events. 7280/14471 cut-off events. For 165946/166291 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 103547 event pairs, 2076 based on Foata normal form. 115/14557 useless extension candidates. Maximal degree in co-relation 75338. Up to 7178 conditions per place. [2023-08-31 22:15:02,538 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 502 selfloop transitions, 288 changer transitions 0/797 dead transitions. [2023-08-31 22:15:02,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 797 transitions, 10832 flow [2023-08-31 22:15:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 22:15:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 22:15:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 9617 transitions. [2023-08-31 22:15:02,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547661207023757 [2023-08-31 22:15:02,544 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 9617 transitions. [2023-08-31 22:15:02,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 9617 transitions. [2023-08-31 22:15:02,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:15:02,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 9617 transitions. [2023-08-31 22:15:02,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 267.1388888888889) internal successors, (9617), 36 states have internal predecessors, (9617), 0 states have call successors, (0), 0 states 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 22:15:02,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 753.0) internal successors, (27861), 37 states have internal predecessors, (27861), 0 states have call successors, (0), 0 states 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 22:15:02,561 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 753.0) internal successors, (27861), 37 states have internal predecessors, (27861), 0 states have call successors, (0), 0 states 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 22:15:02,561 INFO L175 Difference]: Start difference. First operand has 466 places, 522 transitions, 6570 flow. Second operand 36 states and 9617 transitions. [2023-08-31 22:15:02,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 797 transitions, 10832 flow [2023-08-31 22:15:03,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 797 transitions, 10130 flow, removed 300 selfloop flow, removed 6 redundant places. [2023-08-31 22:15:03,755 INFO L231 Difference]: Finished difference. Result has 498 places, 604 transitions, 8245 flow [2023-08-31 22:15:03,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=5912, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8245, PETRI_PLACES=498, PETRI_TRANSITIONS=604} [2023-08-31 22:15:03,756 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 359 predicate places. [2023-08-31 22:15:03,756 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 604 transitions, 8245 flow [2023-08-31 22:15:03,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 22:15:03,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:15:03,758 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:15:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-31 22:15:03,758 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:15:03,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:15:03,758 INFO L85 PathProgramCache]: Analyzing trace with hash 254862047, now seen corresponding path program 9 times [2023-08-31 22:15:03,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:15:03,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832537548] [2023-08-31 22:15:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:15:03,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:15:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:15:05,763 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 22:15:05,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:15:05,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832537548] [2023-08-31 22:15:05,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832537548] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:15:05,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:15:05,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-08-31 22:15:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926261137] [2023-08-31 22:15:05,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:15:05,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 22:15:05,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:15:05,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 22:15:05,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-08-31 22:15:13,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 753 [2023-08-31 22:15:13,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 604 transitions, 8245 flow. Second operand has 22 states, 22 states have (on average 262.6818181818182) internal successors, (5779), 22 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states 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 22:15:13,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:15:13,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 753 [2023-08-31 22:15:13,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:15:19,218 INFO L130 PetriNetUnfolder]: 7533/14865 cut-off events. [2023-08-31 22:15:19,219 INFO L131 PetriNetUnfolder]: For 178530/178876 co-relation queries the response was YES. [2023-08-31 22:15:19,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79451 conditions, 14865 events. 7533/14865 cut-off events. For 178530/178876 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 106273 event pairs, 2564 based on Foata normal form. 18/14840 useless extension candidates. Maximal degree in co-relation 79284. Up to 11764 conditions per place. [2023-08-31 22:15:19,483 INFO L137 encePairwiseOnDemand]: 729/753 looper letters, 608 selfloop transitions, 150 changer transitions 0/765 dead transitions. [2023-08-31 22:15:19,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 765 transitions, 11415 flow [2023-08-31 22:15:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 22:15:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 22:15:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8046 transitions. [2023-08-31 22:15:19,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3561752988047809 [2023-08-31 22:15:19,488 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8046 transitions. [2023-08-31 22:15:19,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8046 transitions. [2023-08-31 22:15:19,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:15:19,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8046 transitions. [2023-08-31 22:15:19,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 268.2) internal successors, (8046), 30 states have internal predecessors, (8046), 0 states have call successors, (0), 0 states 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 22:15:19,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 22:15:19,502 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 22:15:19,502 INFO L175 Difference]: Start difference. First operand has 498 places, 604 transitions, 8245 flow. Second operand 30 states and 8046 transitions. [2023-08-31 22:15:19,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 765 transitions, 11415 flow [2023-08-31 22:15:21,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 765 transitions, 10026 flow, removed 525 selfloop flow, removed 13 redundant places. [2023-08-31 22:15:21,374 INFO L231 Difference]: Finished difference. Result has 528 places, 645 transitions, 8412 flow [2023-08-31 22:15:21,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=7053, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8412, PETRI_PLACES=528, PETRI_TRANSITIONS=645} [2023-08-31 22:15:21,375 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 389 predicate places. [2023-08-31 22:15:21,375 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 645 transitions, 8412 flow [2023-08-31 22:15:21,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 262.6818181818182) internal successors, (5779), 22 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states 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 22:15:21,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:15:21,376 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:15:21,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-31 22:15:21,376 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:15:21,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:15:21,376 INFO L85 PathProgramCache]: Analyzing trace with hash -201092445, now seen corresponding path program 10 times [2023-08-31 22:15:21,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:15:21,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751573845] [2023-08-31 22:15:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:15:21,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:15:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:15:23,518 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 22:15:23,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:15:23,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751573845] [2023-08-31 22:15:23,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751573845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:15:23,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:15:23,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-31 22:15:23,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195591104] [2023-08-31 22:15:23,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:15:23,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 22:15:23,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:15:23,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 22:15:23,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-08-31 22:15:30,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 753 [2023-08-31 22:15:30,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 645 transitions, 8412 flow. Second operand has 21 states, 21 states have (on average 262.76190476190476) internal successors, (5518), 21 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states 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 22:15:30,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:15:30,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 753 [2023-08-31 22:15:30,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:15:37,625 INFO L130 PetriNetUnfolder]: 8629/17231 cut-off events. [2023-08-31 22:15:37,625 INFO L131 PetriNetUnfolder]: For 137198/137520 co-relation queries the response was YES. [2023-08-31 22:15:37,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85436 conditions, 17231 events. 8629/17231 cut-off events. For 137198/137520 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 129390 event pairs, 2122 based on Foata normal form. 94/17292 useless extension candidates. Maximal degree in co-relation 85256. Up to 8304 conditions per place. [2023-08-31 22:15:37,847 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 652 selfloop transitions, 290 changer transitions 0/949 dead transitions. [2023-08-31 22:15:37,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 949 transitions, 13186 flow [2023-08-31 22:15:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-31 22:15:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-31 22:15:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 9942 transitions. [2023-08-31 22:15:37,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.356842898675568 [2023-08-31 22:15:37,855 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 9942 transitions. [2023-08-31 22:15:37,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 9942 transitions. [2023-08-31 22:15:37,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:15:37,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 9942 transitions. [2023-08-31 22:15:37,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 268.7027027027027) internal successors, (9942), 37 states have internal predecessors, (9942), 0 states have call successors, (0), 0 states 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 22:15:37,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 753.0) internal successors, (28614), 38 states have internal predecessors, (28614), 0 states have call successors, (0), 0 states 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 22:15:37,876 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 753.0) internal successors, (28614), 38 states have internal predecessors, (28614), 0 states have call successors, (0), 0 states 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 22:15:37,876 INFO L175 Difference]: Start difference. First operand has 528 places, 645 transitions, 8412 flow. Second operand 37 states and 9942 transitions. [2023-08-31 22:15:37,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 949 transitions, 13186 flow [2023-08-31 22:15:39,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 949 transitions, 12564 flow, removed 260 selfloop flow, removed 6 redundant places. [2023-08-31 22:15:39,181 INFO L231 Difference]: Finished difference. Result has 581 places, 758 transitions, 10687 flow [2023-08-31 22:15:39,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=7794, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10687, PETRI_PLACES=581, PETRI_TRANSITIONS=758} [2023-08-31 22:15:39,182 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 442 predicate places. [2023-08-31 22:15:39,182 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 758 transitions, 10687 flow [2023-08-31 22:15:39,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 262.76190476190476) internal successors, (5518), 21 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states 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 22:15:39,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:15:39,183 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:15:39,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-31 22:15:39,184 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:15:39,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:15:39,184 INFO L85 PathProgramCache]: Analyzing trace with hash 721594627, now seen corresponding path program 11 times [2023-08-31 22:15:39,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:15:39,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579798335] [2023-08-31 22:15:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:15:39,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:15:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:16:08,312 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 22:16:08,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:16:08,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579798335] [2023-08-31 22:16:08,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579798335] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:16:08,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:16:08,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-08-31 22:16:08,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980243465] [2023-08-31 22:16:08,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:16:08,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 22:16:08,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:16:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 22:16:08,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-08-31 22:18:16,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 753 [2023-08-31 22:18:16,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 758 transitions, 10687 flow. Second operand has 25 states, 25 states have (on average 251.48) internal successors, (6287), 25 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states 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 22:18:16,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:18:16,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 753 [2023-08-31 22:18:16,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:18:44,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 22:18:51,218 INFO L130 PetriNetUnfolder]: 9854/19616 cut-off events. [2023-08-31 22:18:51,218 INFO L131 PetriNetUnfolder]: For 199143/199465 co-relation queries the response was YES. [2023-08-31 22:18:51,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104083 conditions, 19616 events. 9854/19616 cut-off events. For 199143/199465 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 151378 event pairs, 2238 based on Foata normal form. 22/19599 useless extension candidates. Maximal degree in co-relation 103879. Up to 9149 conditions per place. [2023-08-31 22:18:51,562 INFO L137 encePairwiseOnDemand]: 723/753 looper letters, 796 selfloop transitions, 322 changer transitions 0/1124 dead transitions. [2023-08-31 22:18:51,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1124 transitions, 17668 flow [2023-08-31 22:18:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 22:18:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 22:18:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8751 transitions. [2023-08-31 22:18:51,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3418092336536208 [2023-08-31 22:18:51,569 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8751 transitions. [2023-08-31 22:18:51,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8751 transitions. [2023-08-31 22:18:51,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:18:51,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8751 transitions. [2023-08-31 22:18:51,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 257.38235294117646) internal successors, (8751), 34 states have internal predecessors, (8751), 0 states have call successors, (0), 0 states 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 22:18:51,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 753.0) internal successors, (26355), 35 states have internal predecessors, (26355), 0 states have call successors, (0), 0 states 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 22:18:51,585 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 753.0) internal successors, (26355), 35 states have internal predecessors, (26355), 0 states have call successors, (0), 0 states 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 22:18:51,585 INFO L175 Difference]: Start difference. First operand has 581 places, 758 transitions, 10687 flow. Second operand 34 states and 8751 transitions. [2023-08-31 22:18:51,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1124 transitions, 17668 flow [2023-08-31 22:18:53,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1124 transitions, 16406 flow, removed 580 selfloop flow, removed 6 redundant places. [2023-08-31 22:18:53,816 INFO L231 Difference]: Finished difference. Result has 628 places, 913 transitions, 13692 flow [2023-08-31 22:18:53,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=9989, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=13692, PETRI_PLACES=628, PETRI_TRANSITIONS=913} [2023-08-31 22:18:53,817 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 489 predicate places. [2023-08-31 22:18:53,817 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 913 transitions, 13692 flow [2023-08-31 22:18:53,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 251.48) internal successors, (6287), 25 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states 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 22:18:53,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:18:53,817 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:18:53,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-31 22:18:53,818 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:18:53,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:18:53,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1331153011, now seen corresponding path program 12 times [2023-08-31 22:18:53,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:18:53,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453903648] [2023-08-31 22:18:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:18:53,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:18:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:18:56,059 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 22:18:56,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:18:56,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453903648] [2023-08-31 22:18:56,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453903648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:18:56,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:18:56,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-08-31 22:18:56,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376515009] [2023-08-31 22:18:56,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:18:56,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 22:18:56,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:18:56,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 22:18:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2023-08-31 22:19:05,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-31 22:19:05,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 913 transitions, 13692 flow. Second operand has 22 states, 22 states have (on average 260.6818181818182) internal successors, (5735), 22 states have internal predecessors, (5735), 0 states have call successors, (0), 0 states 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 22:19:05,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:19:05,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-31 22:19:05,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:19:15,615 INFO L130 PetriNetUnfolder]: 10029/19980 cut-off events. [2023-08-31 22:19:15,615 INFO L131 PetriNetUnfolder]: For 241120/241627 co-relation queries the response was YES. [2023-08-31 22:19:16,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109939 conditions, 19980 events. 10029/19980 cut-off events. For 241120/241627 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 155057 event pairs, 2029 based on Foata normal form. 94/20035 useless extension candidates. Maximal degree in co-relation 109715. Up to 8254 conditions per place. [2023-08-31 22:19:16,118 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 654 selfloop transitions, 479 changer transitions 0/1139 dead transitions. [2023-08-31 22:19:16,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 1139 transitions, 18406 flow [2023-08-31 22:19:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 22:19:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 22:19:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 8535 transitions. [2023-08-31 22:19:16,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542081673306773 [2023-08-31 22:19:16,124 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 8535 transitions. [2023-08-31 22:19:16,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 8535 transitions. [2023-08-31 22:19:16,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:19:16,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 8535 transitions. [2023-08-31 22:19:16,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 266.71875) internal successors, (8535), 32 states have internal predecessors, (8535), 0 states have call successors, (0), 0 states 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 22:19:16,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 753.0) internal successors, (24849), 33 states have internal predecessors, (24849), 0 states have call successors, (0), 0 states 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 22:19:16,143 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 753.0) internal successors, (24849), 33 states have internal predecessors, (24849), 0 states have call successors, (0), 0 states 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 22:19:16,143 INFO L175 Difference]: Start difference. First operand has 628 places, 913 transitions, 13692 flow. Second operand 32 states and 8535 transitions. [2023-08-31 22:19:16,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 659 places, 1139 transitions, 18406 flow [2023-08-31 22:19:19,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 1139 transitions, 17786 flow, removed 176 selfloop flow, removed 10 redundant places. [2023-08-31 22:19:19,184 INFO L231 Difference]: Finished difference. Result has 661 places, 963 transitions, 15655 flow [2023-08-31 22:19:19,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=13099, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15655, PETRI_PLACES=661, PETRI_TRANSITIONS=963} [2023-08-31 22:19:19,185 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 522 predicate places. [2023-08-31 22:19:19,185 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 963 transitions, 15655 flow [2023-08-31 22:19:19,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 260.6818181818182) internal successors, (5735), 22 states have internal predecessors, (5735), 0 states have call successors, (0), 0 states 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 22:19:19,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:19:19,186 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:19:19,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-31 22:19:19,187 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:19:19,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:19:19,187 INFO L85 PathProgramCache]: Analyzing trace with hash 32128669, now seen corresponding path program 13 times [2023-08-31 22:19:19,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:19:19,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304171525] [2023-08-31 22:19:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:19:19,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:19:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:19:22,764 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 22:19:22,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:19:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304171525] [2023-08-31 22:19:22,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304171525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:19:22,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:19:22,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-31 22:19:22,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806866760] [2023-08-31 22:19:22,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:19:22,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 22:19:22,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:19:22,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 22:19:22,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2023-08-31 22:19:43,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-31 22:19:43,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 963 transitions, 15655 flow. Second operand has 23 states, 23 states have (on average 258.60869565217394) internal successors, (5948), 23 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states 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 22:19:43,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:19:43,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-31 22:19:43,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:19:55,997 INFO L130 PetriNetUnfolder]: 10433/20712 cut-off events. [2023-08-31 22:19:55,997 INFO L131 PetriNetUnfolder]: For 308245/308738 co-relation queries the response was YES. [2023-08-31 22:19:56,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120245 conditions, 20712 events. 10433/20712 cut-off events. For 308245/308738 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 161310 event pairs, 2053 based on Foata normal form. 254/20944 useless extension candidates. Maximal degree in co-relation 120009. Up to 10795 conditions per place. [2023-08-31 22:19:56,544 INFO L137 encePairwiseOnDemand]: 726/753 looper letters, 888 selfloop transitions, 297 changer transitions 0/1191 dead transitions. [2023-08-31 22:19:56,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 1191 transitions, 20640 flow [2023-08-31 22:19:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-31 22:19:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-31 22:19:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7939 transitions. [2023-08-31 22:19:56,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35143868968570163 [2023-08-31 22:19:56,549 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7939 transitions. [2023-08-31 22:19:56,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7939 transitions. [2023-08-31 22:19:56,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:19:56,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7939 transitions. [2023-08-31 22:19:56,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 264.6333333333333) internal successors, (7939), 30 states have internal predecessors, (7939), 0 states have call successors, (0), 0 states 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 22:19:56,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 22:19:56,563 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 22:19:56,563 INFO L175 Difference]: Start difference. First operand has 661 places, 963 transitions, 15655 flow. Second operand 30 states and 7939 transitions. [2023-08-31 22:19:56,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 1191 transitions, 20640 flow [2023-08-31 22:20:00,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 1191 transitions, 20020 flow, removed 218 selfloop flow, removed 9 redundant places. [2023-08-31 22:20:00,280 INFO L231 Difference]: Finished difference. Result has 696 places, 1026 transitions, 17438 flow [2023-08-31 22:20:00,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=15065, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17438, PETRI_PLACES=696, PETRI_TRANSITIONS=1026} [2023-08-31 22:20:00,281 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 557 predicate places. [2023-08-31 22:20:00,282 INFO L495 AbstractCegarLoop]: Abstraction has has 696 places, 1026 transitions, 17438 flow [2023-08-31 22:20:00,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 258.60869565217394) internal successors, (5948), 23 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states 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 22:20:00,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 22:20:00,283 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 22:20:00,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-31 22:20:00,283 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-31 22:20:00,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 22:20:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash 327272161, now seen corresponding path program 14 times [2023-08-31 22:20:00,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 22:20:00,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884261772] [2023-08-31 22:20:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 22:20:00,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 22:20:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 22:20:02,971 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 22:20:02,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 22:20:02,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884261772] [2023-08-31 22:20:02,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884261772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 22:20:02,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 22:20:02,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-31 22:20:02,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242678140] [2023-08-31 22:20:02,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 22:20:02,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 22:20:02,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 22:20:02,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 22:20:02,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-08-31 22:20:11,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 753 [2023-08-31 22:20:11,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 1026 transitions, 17438 flow. Second operand has 23 states, 23 states have (on average 259.60869565217394) internal successors, (5971), 23 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states 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 22:20:11,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 22:20:11,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 753 [2023-08-31 22:20:11,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 22:20:22,498 INFO L130 PetriNetUnfolder]: 10421/20822 cut-off events. [2023-08-31 22:20:22,498 INFO L131 PetriNetUnfolder]: For 324073/324458 co-relation queries the response was YES. [2023-08-31 22:20:23,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123435 conditions, 20822 events. 10421/20822 cut-off events. For 324073/324458 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 163551 event pairs, 2357 based on Foata normal form. 88/20873 useless extension candidates. Maximal degree in co-relation 123185. Up to 11846 conditions per place. [2023-08-31 22:20:23,200 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 954 selfloop transitions, 245 changer transitions 0/1206 dead transitions. [2023-08-31 22:20:23,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 1206 transitions, 21771 flow [2023-08-31 22:20:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 22:20:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 22:20:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 7446 transitions. [2023-08-31 22:20:23,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35315879339783723 [2023-08-31 22:20:23,209 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 7446 transitions. [2023-08-31 22:20:23,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 7446 transitions. [2023-08-31 22:20:23,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 22:20:23,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 7446 transitions. [2023-08-31 22:20:23,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 265.92857142857144) internal successors, (7446), 28 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 22:20:23,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 753.0) internal successors, (21837), 29 states have internal predecessors, (21837), 0 states have call successors, (0), 0 states 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 22:20:23,233 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 753.0) internal successors, (21837), 29 states have internal predecessors, (21837), 0 states have call successors, (0), 0 states 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 22:20:23,234 INFO L175 Difference]: Start difference. First operand has 696 places, 1026 transitions, 17438 flow. Second operand 28 states and 7446 transitions. [2023-08-31 22:20:23,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 1206 transitions, 21771 flow Killed by 15