./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 804a6f1d000a9eac5cab22029525644887c7b13b33bf8b82b475e09952d467ca --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 05:58:41,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 05:58:41,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 05:58:41,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 05:58:41,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 05:58:41,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 05:58:41,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 05:58:41,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 05:58:41,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 05:58:41,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 05:58:41,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 05:58:41,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 05:58:41,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 05:58:41,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 05:58:41,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 05:58:41,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 05:58:41,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 05:58:41,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 05:58:41,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 05:58:41,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 05:58:41,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 05:58:41,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 05:58:41,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 05:58:41,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 05:58:41,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 05:58:41,705 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 05:58:41,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 05:58:41,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 05:58:41,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 05:58:41,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 05:58:41,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 05:58:41,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 05:58:41,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 05:58:41,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 05:58:41,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 05:58:41,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 05:58:41,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 05:58:41,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 05:58:41,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 05:58:41,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 05:58:41,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 05:58:41,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 05:58:41,740 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 05:58:41,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 05:58:41,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 05:58:41,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 05:58:41,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 05:58:41,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 05:58:41,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 05:58:41,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 05:58:41,743 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 05:58:41,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 05:58:41,744 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 05:58:41,744 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 05:58:41,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 05:58:41,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 05:58:41,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 05:58:41,744 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 05:58:41,745 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 05:58:41,745 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 05:58:41,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 05:58:41,745 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 05:58:41,745 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 05:58:41,745 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 05:58:41,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 05:58:41,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 05:58:41,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 05:58:41,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:58:41,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 05:58:41,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 05:58:41,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 05:58:41,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 05:58:41,747 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 05:58:41,747 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 05:58:41,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 05:58:41,747 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 05:58:41,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 804a6f1d000a9eac5cab22029525644887c7b13b33bf8b82b475e09952d467ca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 05:58:42,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 05:58:42,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 05:58:42,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 05:58:42,022 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 05:58:42,023 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 05:58:42,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c [2023-08-30 05:58:43,130 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 05:58:43,370 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 05:58:43,370 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c [2023-08-30 05:58:43,376 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c06e4765/300cfba2ba3d450ba4c25f445d592e6c/FLAG92142ba43 [2023-08-30 05:58:43,388 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c06e4765/300cfba2ba3d450ba4c25f445d592e6c [2023-08-30 05:58:43,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 05:58:43,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 05:58:43,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 05:58:43,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 05:58:43,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 05:58:43,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72faf1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43, skipping insertion in model container [2023-08-30 05:58:43,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 05:58:43,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 05:58:43,542 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c[4837,4850] [2023-08-30 05:58:43,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:58:43,553 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 05:58:43,573 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c[4837,4850] [2023-08-30 05:58:43,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 05:58:43,580 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:58:43,581 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 05:58:43,586 INFO L208 MainTranslator]: Completed translation [2023-08-30 05:58:43,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43 WrapperNode [2023-08-30 05:58:43,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 05:58:43,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 05:58:43,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 05:58:43,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 05:58:43,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,623 INFO L138 Inliner]: procedures = 26, calls = 115, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 329 [2023-08-30 05:58:43,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 05:58:43,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 05:58:43,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 05:58:43,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 05:58:43,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,658 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 05:58:43,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 05:58:43,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 05:58:43,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 05:58:43,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (1/1) ... [2023-08-30 05:58:43,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 05:58:43,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 05:58:43,733 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) [2023-08-30 05:58:43,742 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 [2023-08-30 05:58:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 05:58:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 05:58:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 05:58:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 05:58:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 05:58:43,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 05:58:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 05:58:43,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 05:58:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 05:58:43,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 05:58:43,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 05:58:43,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 05:58:43,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 05:58:43,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-30 05:58:43,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-30 05:58:43,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-30 05:58:43,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-30 05:58:43,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2023-08-30 05:58:43,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2023-08-30 05:58:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 05:58:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 05:58:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 05:58:43,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 05:58:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 05:58:43,795 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 05:58:43,889 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 05:58:43,891 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 05:58:44,221 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 05:58:44,298 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 05:58:44,299 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 05:58:44,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:58:44 BoogieIcfgContainer [2023-08-30 05:58:44,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 05:58:44,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 05:58:44,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 05:58:44,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 05:58:44,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:58:43" (1/3) ... [2023-08-30 05:58:44,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2293d866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:58:44, skipping insertion in model container [2023-08-30 05:58:44,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:58:43" (2/3) ... [2023-08-30 05:58:44,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2293d866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:58:44, skipping insertion in model container [2023-08-30 05:58:44,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:58:44" (3/3) ... [2023-08-30 05:58:44,307 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-7.wvr.c [2023-08-30 05:58:44,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 05:58:44,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-30 05:58:44,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 05:58:44,406 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-30 05:58:44,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 247 transitions, 550 flow [2023-08-30 05:58:44,541 INFO L130 PetriNetUnfolder]: 2/240 cut-off events. [2023-08-30 05:58:44,541 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 05:58:44,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 240 events. 2/240 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 187 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-08-30 05:58:44,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 247 transitions, 550 flow [2023-08-30 05:58:44,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 236 transitions, 514 flow [2023-08-30 05:58:44,565 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 05:58:44,573 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 236 transitions, 514 flow [2023-08-30 05:58:44,579 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 236 transitions, 514 flow [2023-08-30 05:58:44,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 236 transitions, 514 flow [2023-08-30 05:58:44,615 INFO L130 PetriNetUnfolder]: 2/236 cut-off events. [2023-08-30 05:58:44,619 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-30 05:58:44,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 236 events. 2/236 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 186 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-08-30 05:58:44,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 5386 [2023-08-30 05:58:55,293 INFO L134 LiptonReduction]: Checked pairs total: 30503 [2023-08-30 05:58:55,294 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-08-30 05:58:55,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 05:58:55,315 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;@31070386, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 05:58:55,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-08-30 05:58:55,317 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-08-30 05:58:55,317 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 05:58:55,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:58:55,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 05:58:55,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 05:58:55,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:58:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 971, now seen corresponding path program 1 times [2023-08-30 05:58:55,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:58:55,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24899674] [2023-08-30 05:58:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:58:55,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:58:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:58:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:58:55,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:58:55,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24899674] [2023-08-30 05:58:55,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24899674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:58:55,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:58:55,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 05:58:55,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004738000] [2023-08-30 05:58:55,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:58:55,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 05:58:55,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:58:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 05:58:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 05:58:55,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 452 [2023-08-30 05:58:55,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 87 transitions, 216 flow. Second operand has 2 states, 2 states have (on average 209.5) internal successors, (419), 2 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:58:55,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:58:55,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 452 [2023-08-30 05:58:55,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 05:59:31,716 INFO L130 PetriNetUnfolder]: 513369/645528 cut-off events. [2023-08-30 05:59:31,716 INFO L131 PetriNetUnfolder]: For 13379/13379 co-relation queries the response was YES. [2023-08-30 05:59:33,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284508 conditions, 645528 events. 513369/645528 cut-off events. For 13379/13379 co-relation queries the response was YES. Maximal size of possible extension queue 20238. Compared 4205744 event pairs, 513369 based on Foata normal form. 0/586275 useless extension candidates. Maximal degree in co-relation 1049660. Up to 622589 conditions per place. [2023-08-30 05:59:36,149 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 76 selfloop transitions, 0 changer transitions 0/84 dead transitions. [2023-08-30 05:59:36,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 84 transitions, 362 flow [2023-08-30 05:59:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 05:59:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 05:59:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 497 transitions. [2023-08-30 05:59:36,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497787610619469 [2023-08-30 05:59:36,169 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 497 transitions. [2023-08-30 05:59:36,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 497 transitions. [2023-08-30 05:59:36,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 05:59:36,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 497 transitions. [2023-08-30 05:59:36,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 248.5) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:59:36,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 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) [2023-08-30 05:59:36,185 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 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) [2023-08-30 05:59:36,187 INFO L175 Difference]: Start difference. First operand has 109 places, 87 transitions, 216 flow. Second operand 2 states and 497 transitions. [2023-08-30 05:59:36,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 84 transitions, 362 flow [2023-08-30 05:59:43,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 84 transitions, 334 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-08-30 05:59:43,790 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 182 flow [2023-08-30 05:59:43,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2023-08-30 05:59:43,794 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -16 predicate places. [2023-08-30 05:59:43,795 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 182 flow [2023-08-30 05:59:43,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 209.5) internal successors, (419), 2 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:59:43,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 05:59:43,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 05:59:43,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 05:59:43,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 05:59:43,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 05:59:43,797 INFO L85 PathProgramCache]: Analyzing trace with hash 954471, now seen corresponding path program 1 times [2023-08-30 05:59:43,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 05:59:43,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900278131] [2023-08-30 05:59:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 05:59:43,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 05:59:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 05:59:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 05:59:44,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 05:59:44,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900278131] [2023-08-30 05:59:44,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900278131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 05:59:44,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 05:59:44,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 05:59:44,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429091798] [2023-08-30 05:59:44,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 05:59:44,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 05:59:44,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 05:59:44,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 05:59:44,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 05:59:44,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-08-30 05:59:44,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 05:59:44,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 05:59:44,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-08-30 05:59:44,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:00:16,491 INFO L130 PetriNetUnfolder]: 494934/622991 cut-off events. [2023-08-30 06:00:16,492 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:00:17,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1228508 conditions, 622991 events. 494934/622991 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19992. Compared 4062477 event pairs, 494934 based on Foata normal form. 0/567838 useless extension candidates. Maximal degree in co-relation 1228505. Up to 600053 conditions per place. [2023-08-30 06:00:20,852 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 73 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 06:00:20,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 82 transitions, 326 flow [2023-08-30 06:00:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:00:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:00:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2023-08-30 06:00:20,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073746312684366 [2023-08-30 06:00:20,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2023-08-30 06:00:20,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2023-08-30 06:00:20,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:00:20,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2023-08-30 06:00:20,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:00:20,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:00:20,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:00:20,900 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 182 flow. Second operand 3 states and 688 transitions. [2023-08-30 06:00:20,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 82 transitions, 326 flow [2023-08-30 06:00:21,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 82 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 06:00:21,123 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 180 flow [2023-08-30 06:00:21,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2023-08-30 06:00:21,124 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -16 predicate places. [2023-08-30 06:00:21,124 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 180 flow [2023-08-30 06:00:21,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:00:21,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:00:21,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:00:21,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 06:00:21,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:00:21,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:00:21,125 INFO L85 PathProgramCache]: Analyzing trace with hash 954473, now seen corresponding path program 1 times [2023-08-30 06:00:21,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:00:21,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496134388] [2023-08-30 06:00:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:00:21,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:00:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:00:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:00:21,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:00:21,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496134388] [2023-08-30 06:00:21,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496134388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:00:21,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:00:21,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:00:21,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629473294] [2023-08-30 06:00:21,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:00:21,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:00:21,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:00:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:00:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:00:21,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-08-30 06:00:21,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:00:21,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:00:21,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-08-30 06:00:21,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:00:52,634 INFO L130 PetriNetUnfolder]: 476499/600454 cut-off events. [2023-08-30 06:00:52,634 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:00:53,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183438 conditions, 600454 events. 476499/600454 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3920233 event pairs, 476499 based on Foata normal form. 0/549401 useless extension candidates. Maximal degree in co-relation 1183434. Up to 577518 conditions per place. [2023-08-30 06:00:56,354 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 71 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-30 06:00:56,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 80 transitions, 320 flow [2023-08-30 06:00:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:00:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:00:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-08-30 06:00:56,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4859882005899705 [2023-08-30 06:00:56,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-08-30 06:00:56,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-08-30 06:00:56,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:00:56,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-08-30 06:00:56,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:00:56,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:00:56,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:00:56,383 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 180 flow. Second operand 3 states and 659 transitions. [2023-08-30 06:00:56,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 80 transitions, 320 flow [2023-08-30 06:00:56,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 80 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:00:56,386 INFO L231 Difference]: Finished difference. Result has 92 places, 80 transitions, 177 flow [2023-08-30 06:00:56,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=92, PETRI_TRANSITIONS=80} [2023-08-30 06:00:56,400 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -17 predicate places. [2023-08-30 06:00:56,403 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 80 transitions, 177 flow [2023-08-30 06:00:56,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:00:56,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:00:56,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:00:56,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 06:00:56,404 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:00:56,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:00:56,404 INFO L85 PathProgramCache]: Analyzing trace with hash 917270692, now seen corresponding path program 1 times [2023-08-30 06:00:56,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:00:56,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939500668] [2023-08-30 06:00:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:00:56,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:00:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:00:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:00:56,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:00:56,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939500668] [2023-08-30 06:00:56,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939500668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:00:56,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:00:56,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:00:56,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929918613] [2023-08-30 06:00:56,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:00:56,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:00:56,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:00:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:00:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:00:56,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-08-30 06:00:56,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 80 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:00:56,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:00:56,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-08-30 06:00:56,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:01:30,037 INFO L130 PetriNetUnfolder]: 472635/595546 cut-off events. [2023-08-30 06:01:30,038 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:01:31,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173627 conditions, 595546 events. 472635/595546 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3888940 event pairs, 472635 based on Foata normal form. 0/545534 useless extension candidates. Maximal degree in co-relation 1173623. Up to 572614 conditions per place. [2023-08-30 06:01:34,088 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 69 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-08-30 06:01:34,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 78 transitions, 313 flow [2023-08-30 06:01:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:01:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:01:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 657 transitions. [2023-08-30 06:01:34,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48451327433628316 [2023-08-30 06:01:34,090 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 657 transitions. [2023-08-30 06:01:34,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 657 transitions. [2023-08-30 06:01:34,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:01:34,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 657 transitions. [2023-08-30 06:01:34,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:34,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:34,124 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:34,125 INFO L175 Difference]: Start difference. First operand has 92 places, 80 transitions, 177 flow. Second operand 3 states and 657 transitions. [2023-08-30 06:01:34,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 78 transitions, 313 flow [2023-08-30 06:01:34,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 78 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:01:34,129 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 174 flow [2023-08-30 06:01:34,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2023-08-30 06:01:34,131 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -18 predicate places. [2023-08-30 06:01:34,131 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 174 flow [2023-08-30 06:01:34,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:34,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:01:34,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:01:34,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 06:01:34,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:01:34,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:01:34,147 INFO L85 PathProgramCache]: Analyzing trace with hash 917270693, now seen corresponding path program 1 times [2023-08-30 06:01:34,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:01:34,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428878155] [2023-08-30 06:01:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:01:34,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:01:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:01:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:01:34,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:01:34,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428878155] [2023-08-30 06:01:34,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428878155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:01:34,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:01:34,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:01:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751312094] [2023-08-30 06:01:34,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:01:34,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:01:34,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:01:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:01:34,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:01:34,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-08-30 06:01:34,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:01:34,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:01:34,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-08-30 06:01:34,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:05,088 INFO L130 PetriNetUnfolder]: 468771/590638 cut-off events. [2023-08-30 06:02:05,088 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:02:06,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163816 conditions, 590638 events. 468771/590638 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3857420 event pairs, 468771 based on Foata normal form. 0/541667 useless extension candidates. Maximal degree in co-relation 1163812. Up to 567710 conditions per place. [2023-08-30 06:02:09,039 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 67 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-30 06:02:09,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 76 transitions, 306 flow [2023-08-30 06:02:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-08-30 06:02:09,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029498525073747 [2023-08-30 06:02:09,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-08-30 06:02:09,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-08-30 06:02:09,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:09,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-08-30 06:02:09,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:09,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:09,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:09,073 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 174 flow. Second operand 3 states and 682 transitions. [2023-08-30 06:02:09,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 76 transitions, 306 flow [2023-08-30 06:02:09,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 76 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:09,079 INFO L231 Difference]: Finished difference. Result has 90 places, 76 transitions, 171 flow [2023-08-30 06:02:09,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=90, PETRI_TRANSITIONS=76} [2023-08-30 06:02:09,080 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -19 predicate places. [2023-08-30 06:02:09,080 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 76 transitions, 171 flow [2023-08-30 06:02:09,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:09,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:09,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:02:09,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 06:02:09,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:02:09,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1028861716, now seen corresponding path program 1 times [2023-08-30 06:02:09,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:02:09,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583585823] [2023-08-30 06:02:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:09,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:02:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:02:09,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:02:09,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583585823] [2023-08-30 06:02:09,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583585823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:09,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:09,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:02:09,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229808139] [2023-08-30 06:02:09,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:09,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:02:09,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:02:09,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:02:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:02:09,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-08-30 06:02:09,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:09,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:09,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-08-30 06:02:09,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:02:42,079 INFO L130 PetriNetUnfolder]: 467859/589390 cut-off events. [2023-08-30 06:02:42,080 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:02:43,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161337 conditions, 589390 events. 467859/589390 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3849260 event pairs, 467859 based on Foata normal form. 0/540743 useless extension candidates. Maximal degree in co-relation 1161333. Up to 566478 conditions per place. [2023-08-30 06:02:46,047 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 65 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-30 06:02:46,047 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 299 flow [2023-08-30 06:02:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:02:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:02:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2023-08-30 06:02:46,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014749262536873 [2023-08-30 06:02:46,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2023-08-30 06:02:46,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2023-08-30 06:02:46,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:02:46,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2023-08-30 06:02:46,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:46,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:46,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:46,055 INFO L175 Difference]: Start difference. First operand has 90 places, 76 transitions, 171 flow. Second operand 3 states and 680 transitions. [2023-08-30 06:02:46,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 299 flow [2023-08-30 06:02:46,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 74 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:02:46,057 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 168 flow [2023-08-30 06:02:46,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2023-08-30 06:02:46,059 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -20 predicate places. [2023-08-30 06:02:46,060 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 168 flow [2023-08-30 06:02:46,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:46,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:02:46,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:02:46,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 06:02:46,062 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:02:46,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:02:46,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1028861715, now seen corresponding path program 1 times [2023-08-30 06:02:46,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:02:46,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493399189] [2023-08-30 06:02:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:02:46,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:02:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:02:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:02:46,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:02:46,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493399189] [2023-08-30 06:02:46,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493399189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:02:46,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:02:46,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:02:46,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896074985] [2023-08-30 06:02:46,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:02:46,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:02:46,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:02:46,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:02:46,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:02:46,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-08-30 06:02:46,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:02:46,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:02:46,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-08-30 06:02:46,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:03:18,525 INFO L130 PetriNetUnfolder]: 466947/588142 cut-off events. [2023-08-30 06:03:18,525 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:03:20,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158858 conditions, 588142 events. 466947/588142 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3841805 event pairs, 466947 based on Foata normal form. 0/539819 useless extension candidates. Maximal degree in co-relation 1158854. Up to 565246 conditions per place. [2023-08-30 06:03:22,787 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 63 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2023-08-30 06:03:22,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 72 transitions, 292 flow [2023-08-30 06:03:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:03:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:03:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2023-08-30 06:03:22,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48008849557522126 [2023-08-30 06:03:22,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2023-08-30 06:03:22,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2023-08-30 06:03:22,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:03:22,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2023-08-30 06:03:22,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.0) internal successors, (651), 3 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) [2023-08-30 06:03:22,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:22,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:22,808 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 168 flow. Second operand 3 states and 651 transitions. [2023-08-30 06:03:22,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 72 transitions, 292 flow [2023-08-30 06:03:22,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 72 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:03:22,819 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 165 flow [2023-08-30 06:03:22,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2023-08-30 06:03:22,820 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -21 predicate places. [2023-08-30 06:03:22,820 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 165 flow [2023-08-30 06:03:22,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:22,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:03:22,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:03:22,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 06:03:22,821 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:03:22,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:03:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash 893655106, now seen corresponding path program 1 times [2023-08-30 06:03:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:03:22,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129254264] [2023-08-30 06:03:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:03:22,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:03:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:03:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:03:23,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:03:23,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129254264] [2023-08-30 06:03:23,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129254264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:03:23,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:03:23,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:03:23,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058663822] [2023-08-30 06:03:23,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:03:23,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:03:23,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:03:23,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:03:23,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:03:23,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-08-30 06:03:23,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:23,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:03:23,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-08-30 06:03:23,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:03:54,454 INFO L130 PetriNetUnfolder]: 466035/586846 cut-off events. [2023-08-30 06:03:54,454 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:03:55,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156331 conditions, 586846 events. 466035/586846 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3831928 event pairs, 466035 based on Foata normal form. 0/538843 useless extension candidates. Maximal degree in co-relation 1156327. Up to 564014 conditions per place. [2023-08-30 06:03:58,573 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 61 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-08-30 06:03:58,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 70 transitions, 285 flow [2023-08-30 06:03:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:03:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:03:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2023-08-30 06:03:58,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49852507374631266 [2023-08-30 06:03:58,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2023-08-30 06:03:58,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2023-08-30 06:03:58,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:03:58,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2023-08-30 06:03:58,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:58,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:58,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:58,579 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 165 flow. Second operand 3 states and 676 transitions. [2023-08-30 06:03:58,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 70 transitions, 285 flow [2023-08-30 06:03:58,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 70 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:03:58,584 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 162 flow [2023-08-30 06:03:58,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2023-08-30 06:03:58,587 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -22 predicate places. [2023-08-30 06:03:58,587 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 162 flow [2023-08-30 06:03:58,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:58,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:03:58,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:03:58,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 06:03:58,588 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:03:58,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:03:58,588 INFO L85 PathProgramCache]: Analyzing trace with hash 893655104, now seen corresponding path program 1 times [2023-08-30 06:03:58,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:03:58,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138580132] [2023-08-30 06:03:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:03:58,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:03:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:03:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:03:58,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:03:58,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138580132] [2023-08-30 06:03:58,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138580132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:03:58,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:03:58,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:03:58,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73351428] [2023-08-30 06:03:58,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:03:58,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:03:58,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:03:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:03:58,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:03:58,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-08-30 06:03:58,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 70 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:03:58,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:03:58,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-08-30 06:03:58,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:04:31,473 INFO L130 PetriNetUnfolder]: 465123/585550 cut-off events. [2023-08-30 06:04:31,473 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:04:33,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153804 conditions, 585550 events. 465123/585550 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3821494 event pairs, 465123 based on Foata normal form. 0/537867 useless extension candidates. Maximal degree in co-relation 1153800. Up to 562782 conditions per place. [2023-08-30 06:04:35,876 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 59 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-08-30 06:04:35,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 68 transitions, 278 flow [2023-08-30 06:04:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:04:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:04:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2023-08-30 06:04:35,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4771386430678466 [2023-08-30 06:04:35,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2023-08-30 06:04:35,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2023-08-30 06:04:35,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:04:35,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2023-08-30 06:04:35,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:35,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:35,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:35,902 INFO L175 Difference]: Start difference. First operand has 87 places, 70 transitions, 162 flow. Second operand 3 states and 647 transitions. [2023-08-30 06:04:35,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 68 transitions, 278 flow [2023-08-30 06:04:35,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 68 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:04:35,914 INFO L231 Difference]: Finished difference. Result has 86 places, 68 transitions, 159 flow [2023-08-30 06:04:35,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=86, PETRI_TRANSITIONS=68} [2023-08-30 06:04:35,915 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -23 predicate places. [2023-08-30 06:04:35,915 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 68 transitions, 159 flow [2023-08-30 06:04:35,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:35,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:04:35,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:04:35,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 06:04:35,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:04:35,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:04:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash -190879879, now seen corresponding path program 1 times [2023-08-30 06:04:35,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:04:35,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463506113] [2023-08-30 06:04:35,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:04:35,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:04:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:04:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:04:36,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:04:36,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463506113] [2023-08-30 06:04:36,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463506113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:04:36,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:04:36,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:04:36,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359497344] [2023-08-30 06:04:36,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:04:36,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:04:36,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:04:36,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:04:36,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:04:36,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-08-30 06:04:36,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 68 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:04:36,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:04:36,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-08-30 06:04:36,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:08,894 INFO L130 PetriNetUnfolder]: 461259/580390 cut-off events. [2023-08-30 06:05:08,894 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:05:10,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143741 conditions, 580390 events. 461259/580390 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19706. Compared 3781962 event pairs, 461259 based on Foata normal form. 0/533811 useless extension candidates. Maximal degree in co-relation 1143737. Up to 557878 conditions per place. [2023-08-30 06:05:13,100 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 57 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-08-30 06:05:13,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 66 transitions, 271 flow [2023-08-30 06:05:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:05:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:05:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-30 06:05:13,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756637168141593 [2023-08-30 06:05:13,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-30 06:05:13,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-30 06:05:13,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:13,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-30 06:05:13,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:13,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:13,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:13,131 INFO L175 Difference]: Start difference. First operand has 86 places, 68 transitions, 159 flow. Second operand 3 states and 645 transitions. [2023-08-30 06:05:13,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 66 transitions, 271 flow [2023-08-30 06:05:13,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 66 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:05:13,133 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 156 flow [2023-08-30 06:05:13,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2023-08-30 06:05:13,134 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -24 predicate places. [2023-08-30 06:05:13,134 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 156 flow [2023-08-30 06:05:13,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:13,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:13,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:05:13,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 06:05:13,135 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:05:13,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:13,135 INFO L85 PathProgramCache]: Analyzing trace with hash -190879880, now seen corresponding path program 1 times [2023-08-30 06:05:13,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:05:13,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616291611] [2023-08-30 06:05:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:13,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:05:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:13,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:05:13,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616291611] [2023-08-30 06:05:13,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616291611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:13,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:13,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:05:13,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250517921] [2023-08-30 06:05:13,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:13,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:05:13,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:05:13,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:05:13,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:05:13,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-08-30 06:05:13,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:13,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:13,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-08-30 06:05:13,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:05:46,428 INFO L130 PetriNetUnfolder]: 457395/575230 cut-off events. [2023-08-30 06:05:46,429 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:05:48,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133678 conditions, 575230 events. 457395/575230 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19666. Compared 3743631 event pairs, 457395 based on Foata normal form. 0/529755 useless extension candidates. Maximal degree in co-relation 1133674. Up to 552974 conditions per place. [2023-08-30 06:05:50,565 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 55 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-08-30 06:05:50,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 64 transitions, 264 flow [2023-08-30 06:05:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:05:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:05:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 670 transitions. [2023-08-30 06:05:50,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941002949852507 [2023-08-30 06:05:50,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 670 transitions. [2023-08-30 06:05:50,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 670 transitions. [2023-08-30 06:05:50,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:05:50,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 670 transitions. [2023-08-30 06:05:50,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:50,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:50,590 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:50,590 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 156 flow. Second operand 3 states and 670 transitions. [2023-08-30 06:05:50,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 64 transitions, 264 flow [2023-08-30 06:05:50,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 64 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:05:50,592 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 153 flow [2023-08-30 06:05:50,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2023-08-30 06:05:50,592 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -25 predicate places. [2023-08-30 06:05:50,592 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 153 flow [2023-08-30 06:05:50,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:50,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:05:50,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:05:50,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 06:05:50,593 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:05:50,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:05:50,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1248054198, now seen corresponding path program 1 times [2023-08-30 06:05:50,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:05:50,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004219040] [2023-08-30 06:05:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:05:50,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:05:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:05:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:05:50,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:05:50,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004219040] [2023-08-30 06:05:50,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004219040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:05:50,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:05:50,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:05:50,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128840878] [2023-08-30 06:05:50,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:05:50,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:05:50,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:05:50,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:05:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:05:50,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-08-30 06:05:50,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:05:50,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:05:50,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-08-30 06:05:50,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:06:21,346 INFO L130 PetriNetUnfolder]: 438960/551671 cut-off events. [2023-08-30 06:06:21,347 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:06:23,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087585 conditions, 551671 events. 438960/551671 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 18922. Compared 3568052 event pairs, 438960 based on Foata normal form. 0/510296 useless extension candidates. Maximal degree in co-relation 1087581. Up to 530439 conditions per place. [2023-08-30 06:06:25,912 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 53 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-08-30 06:06:25,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 62 transitions, 257 flow [2023-08-30 06:06:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:06:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:06:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-08-30 06:06:25,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49262536873156343 [2023-08-30 06:06:25,915 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-08-30 06:06:25,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-08-30 06:06:25,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:06:25,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-08-30 06:06:25,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:25,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:25,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:25,919 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 153 flow. Second operand 3 states and 668 transitions. [2023-08-30 06:06:25,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 62 transitions, 257 flow [2023-08-30 06:06:25,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 62 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:06:25,921 INFO L231 Difference]: Finished difference. Result has 83 places, 62 transitions, 150 flow [2023-08-30 06:06:25,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=83, PETRI_TRANSITIONS=62} [2023-08-30 06:06:25,922 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -26 predicate places. [2023-08-30 06:06:25,922 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 62 transitions, 150 flow [2023-08-30 06:06:25,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:25,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:06:25,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:06:25,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 06:06:25,923 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:06:25,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:06:25,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1248054196, now seen corresponding path program 1 times [2023-08-30 06:06:25,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:06:25,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743853969] [2023-08-30 06:06:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:06:25,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:06:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:06:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:06:25,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:06:25,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743853969] [2023-08-30 06:06:25,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743853969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:06:25,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:06:25,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:06:25,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477290157] [2023-08-30 06:06:25,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:06:25,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:06:25,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:06:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:06:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:06:26,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-08-30 06:06:26,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 62 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:06:26,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:06:26,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-08-30 06:06:26,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:06:56,367 INFO L130 PetriNetUnfolder]: 420525/528112 cut-off events. [2023-08-30 06:06:56,368 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:06:58,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041492 conditions, 528112 events. 420525/528112 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 18178. Compared 3392992 event pairs, 420525 based on Foata normal form. 0/490837 useless extension candidates. Maximal degree in co-relation 1041488. Up to 507904 conditions per place. [2023-08-30 06:07:00,712 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 51 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-08-30 06:07:00,713 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 60 transitions, 250 flow [2023-08-30 06:07:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:07:00,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:07:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-30 06:07:00,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47123893805309736 [2023-08-30 06:07:00,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-30 06:07:00,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-30 06:07:00,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:07:00,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-30 06:07:00,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:00,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:00,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:00,718 INFO L175 Difference]: Start difference. First operand has 83 places, 62 transitions, 150 flow. Second operand 3 states and 639 transitions. [2023-08-30 06:07:00,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 60 transitions, 250 flow [2023-08-30 06:07:00,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 60 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:07:00,720 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 147 flow [2023-08-30 06:07:00,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2023-08-30 06:07:00,722 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -27 predicate places. [2023-08-30 06:07:00,722 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 147 flow [2023-08-30 06:07:00,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:00,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:07:00,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:07:00,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 06:07:00,723 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:07:00,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:07:00,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1084231166, now seen corresponding path program 1 times [2023-08-30 06:07:00,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:07:00,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501769141] [2023-08-30 06:07:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:07:00,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:07:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:07:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:07:00,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:07:00,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501769141] [2023-08-30 06:07:00,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501769141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:07:00,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:07:00,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:07:00,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972427252] [2023-08-30 06:07:00,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:07:00,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:07:00,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:07:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:07:00,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:07:00,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 452 [2023-08-30 06:07:00,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:00,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:07:00,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 452 [2023-08-30 06:07:00,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:07:23,204 INFO L130 PetriNetUnfolder]: 334509/421616 cut-off events. [2023-08-30 06:07:23,204 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:07:24,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832597 conditions, 421616 events. 334509/421616 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 14174. Compared 2681142 event pairs, 334509 based on Foata normal form. 0/401749 useless extension candidates. Maximal degree in co-relation 832593. Up to 405504 conditions per place. [2023-08-30 06:07:25,984 INFO L137 encePairwiseOnDemand]: 450/452 looper letters, 50 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-30 06:07:25,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 59 transitions, 247 flow [2023-08-30 06:07:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:07:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:07:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-08-30 06:07:25,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471976401179941 [2023-08-30 06:07:25,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-08-30 06:07:25,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-08-30 06:07:25,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:07:25,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-08-30 06:07:25,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:25,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:25,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:25,994 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 147 flow. Second operand 3 states and 640 transitions. [2023-08-30 06:07:25,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 59 transitions, 247 flow [2023-08-30 06:07:25,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 59 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:07:25,997 INFO L231 Difference]: Finished difference. Result has 82 places, 59 transitions, 146 flow [2023-08-30 06:07:25,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2023-08-30 06:07:25,999 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -27 predicate places. [2023-08-30 06:07:25,999 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 146 flow [2023-08-30 06:07:26,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:26,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:07:26,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:07:26,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 06:07:26,001 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:07:26,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:07:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1084231165, now seen corresponding path program 1 times [2023-08-30 06:07:26,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:07:26,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323154262] [2023-08-30 06:07:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:07:26,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:07:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:07:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:07:26,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:07:26,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323154262] [2023-08-30 06:07:26,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323154262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:07:26,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:07:26,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-30 06:07:26,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544775734] [2023-08-30 06:07:26,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:07:26,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 06:07:26,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:07:26,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 06:07:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-30 06:07:26,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 452 [2023-08-30 06:07:26,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:26,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:07:26,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 452 [2023-08-30 06:07:26,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:07:42,874 INFO L130 PetriNetUnfolder]: 248493/315120 cut-off events. [2023-08-30 06:07:42,875 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-08-30 06:07:43,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623702 conditions, 315120 events. 248493/315120 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 10173. Compared 1977101 event pairs, 248493 based on Foata normal form. 0/312661 useless extension candidates. Maximal degree in co-relation 623698. Up to 303104 conditions per place. [2023-08-30 06:07:45,063 INFO L137 encePairwiseOnDemand]: 450/452 looper letters, 49 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-30 06:07:45,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 58 transitions, 244 flow [2023-08-30 06:07:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:07:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:07:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-08-30 06:07:45,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415929203539823 [2023-08-30 06:07:45,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-08-30 06:07:45,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-08-30 06:07:45,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:07:45,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-08-30 06:07:45,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:45,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:45,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:45,069 INFO L175 Difference]: Start difference. First operand has 82 places, 59 transitions, 146 flow. Second operand 3 states and 564 transitions. [2023-08-30 06:07:45,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 58 transitions, 244 flow [2023-08-30 06:07:45,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 58 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:07:45,071 INFO L231 Difference]: Finished difference. Result has 82 places, 58 transitions, 145 flow [2023-08-30 06:07:45,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=82, PETRI_TRANSITIONS=58} [2023-08-30 06:07:45,072 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -27 predicate places. [2023-08-30 06:07:45,072 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 58 transitions, 145 flow [2023-08-30 06:07:45,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:45,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:07:45,084 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:07:45,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 06:07:45,084 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-30 06:07:45,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:07:45,085 INFO L85 PathProgramCache]: Analyzing trace with hash -920446415, now seen corresponding path program 1 times [2023-08-30 06:07:45,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 06:07:45,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546651354] [2023-08-30 06:07:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:07:45,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 06:07:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:07:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:07:47,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 06:07:47,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546651354] [2023-08-30 06:07:47,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546651354] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:07:47,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:07:47,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 06:07:47,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346510090] [2023-08-30 06:07:47,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:07:47,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 06:07:47,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 06:07:47,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 06:07:47,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-30 06:07:47,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 452 [2023-08-30 06:07:47,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 58 transitions, 145 flow. Second operand has 7 states, 7 states have (on average 200.28571428571428) internal successors, (1402), 7 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:07:47,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:07:47,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 452 [2023-08-30 06:07:47,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15