./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:55:18,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:55:18,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:55:18,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:55:18,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:55:18,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:55:18,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:55:18,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:55:18,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:55:18,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:55:18,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:55:18,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:55:18,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:55:18,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:55:18,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:55:18,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:55:18,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:55:18,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:55:18,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:55:18,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:55:18,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:55:18,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:55:18,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:55:18,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:55:18,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:55:18,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:55:18,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:55:18,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:55:18,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:55:18,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:55:18,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:55:18,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:55:18,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:55:18,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:55:18,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:55:18,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:55:18,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:55:18,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:55:18,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:55:18,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:55:18,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:55:18,773 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:55:18,796 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:55:18,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:55:18,797 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:55:18,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:55:18,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:55:18,798 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:55:18,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:55:18,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:55:18,799 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:55:18,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:55:18,800 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:55:18,800 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:55:18,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:55:18,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:55:18,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:55:18,801 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:55:18,801 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:55:18,801 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:55:18,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:55:18,802 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:55:18,802 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:55:18,802 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:55:18,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:55:18,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:55:18,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:55:18,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:55:18,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:55:18,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:55:18,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:55:18,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:55:18,803 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:55:18,804 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:55:18,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:55:18,804 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:55:18,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa97ad6141e9aa8818b694f4968e766701fe7261f516cd86f7a15e5cf1a3d14d Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:55:19,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:55:19,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:55:19,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:55:19,106 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:55:19,107 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:55:19,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-08-29 19:55:20,129 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:55:20,395 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:55:20,396 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i [2023-08-29 19:55:20,405 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e01309d90/93e362808dde4d1fbceecf3deb3e893a/FLAG93f929602 [2023-08-29 19:55:20,693 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e01309d90/93e362808dde4d1fbceecf3deb3e893a [2023-08-29 19:55:20,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:55:20,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:55:20,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:55:20,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:55:20,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:55:20,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:55:20" (1/1) ... [2023-08-29 19:55:20,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c2f47b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:20, skipping insertion in model container [2023-08-29 19:55:20,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:55:20" (1/1) ... [2023-08-29 19:55:20,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:55:20,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:55:20,902 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-08-29 19:55:20,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:55:20,919 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:55:20,966 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas.i[31152,31165] [2023-08-29 19:55:20,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:55:21,006 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:55:21,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21 WrapperNode [2023-08-29 19:55:21,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:55:21,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:55:21,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:55:21,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:55:21,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,066 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 190 [2023-08-29 19:55:21,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:55:21,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:55:21,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:55:21,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:55:21,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,109 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:55:21,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:55:21,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:55:21,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:55:21,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (1/1) ... [2023-08-29 19:55:21,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:55:21,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:55:21,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:55:21,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:55:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:55:21,193 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 19:55:21,193 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 19:55:21,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:55:21,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:55:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:55:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:55:21,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:55:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:55:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:55:21,205 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:55:21,294 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:55:21,295 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:55:21,597 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:55:21,781 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:55:21,781 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 19:55:21,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:55:21 BoogieIcfgContainer [2023-08-29 19:55:21,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:55:21,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:55:21,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:55:21,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:55:21,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:55:20" (1/3) ... [2023-08-29 19:55:21,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aacaff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:55:21, skipping insertion in model container [2023-08-29 19:55:21,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:55:21" (2/3) ... [2023-08-29 19:55:21,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aacaff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:55:21, skipping insertion in model container [2023-08-29 19:55:21,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:55:21" (3/3) ... [2023-08-29 19:55:21,792 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas.i [2023-08-29 19:55:21,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:55:21,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-29 19:55:21,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:55:21,894 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:55:21,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-29 19:55:21,985 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-29 19:55:21,985 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:21,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-29 19:55:21,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 160 transitions, 325 flow [2023-08-29 19:55:21,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 325 flow [2023-08-29 19:55:21,997 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:55:22,002 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-29 19:55:22,004 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-29 19:55:22,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-29 19:55:22,029 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-29 19:55:22,032 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:22,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 175 events. 11/175 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 135. Up to 4 conditions per place. [2023-08-29 19:55:22,037 INFO L119 LiptonReduction]: Number of co-enabled transitions 4248 [2023-08-29 19:55:26,364 INFO L134 LiptonReduction]: Checked pairs total: 8906 [2023-08-29 19:55:26,364 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-29 19:55:26,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:55:26,378 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;@220d203f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:55:26,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2023-08-29 19:55:26,381 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-29 19:55:26,381 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:26,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:26,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:26,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:26,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash 30939, now seen corresponding path program 1 times [2023-08-29 19:55:26,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:26,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523952321] [2023-08-29 19:55:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:26,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:26,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:26,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523952321] [2023-08-29 19:55:26,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523952321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:26,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:26,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:26,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701551787] [2023-08-29 19:55:26,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:26,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:26,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:26,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:26,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:26,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 313 [2023-08-29 19:55:26,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:26,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:26,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 313 [2023-08-29 19:55:26,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:26,722 INFO L130 PetriNetUnfolder]: 128/284 cut-off events. [2023-08-29 19:55:26,722 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:26,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 284 events. 128/284 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1141 event pairs, 108 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 554. Up to 279 conditions per place. [2023-08-29 19:55:26,725 INFO L137 encePairwiseOnDemand]: 292/313 looper letters, 45 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-29 19:55:26,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 193 flow [2023-08-29 19:55:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-08-29 19:55:26,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249201277955272 [2023-08-29 19:55:26,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-08-29 19:55:26,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-08-29 19:55:26,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:26,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-08-29 19:55:26,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:26,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:26,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:26,747 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 147 flow. Second operand 3 states and 399 transitions. [2023-08-29 19:55:26,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 193 flow [2023-08-29 19:55:26,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:55:26,750 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 103 flow [2023-08-29 19:55:26,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-29 19:55:26,754 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -19 predicate places. [2023-08-29 19:55:26,754 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 103 flow [2023-08-29 19:55:26,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:26,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:26,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:55:26,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:55:26,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:26,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash 30941, now seen corresponding path program 1 times [2023-08-29 19:55:26,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:26,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581485740] [2023-08-29 19:55:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:26,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:26,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:26,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581485740] [2023-08-29 19:55:26,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581485740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:26,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:26,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:55:26,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573375509] [2023-08-29 19:55:26,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:26,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:26,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:26,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:26,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:26,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 313 [2023-08-29 19:55:26,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:26,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:26,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 313 [2023-08-29 19:55:26,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:26,918 INFO L130 PetriNetUnfolder]: 172/397 cut-off events. [2023-08-29 19:55:26,919 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:55:26,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 397 events. 172/397 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1608 event pairs, 90 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 787. Up to 205 conditions per place. [2023-08-29 19:55:26,921 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 73 selfloop transitions, 4 changer transitions 1/80 dead transitions. [2023-08-29 19:55:26,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 323 flow [2023-08-29 19:55:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-29 19:55:26,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422790202342918 [2023-08-29 19:55:26,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-29 19:55:26,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-29 19:55:26,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:26,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-29 19:55:26,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:26,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:26,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:26,927 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 103 flow. Second operand 3 states and 397 transitions. [2023-08-29 19:55:26,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 323 flow [2023-08-29 19:55:26,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 80 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:26,929 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 130 flow [2023-08-29 19:55:26,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-08-29 19:55:26,930 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-08-29 19:55:26,930 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 130 flow [2023-08-29 19:55:26,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:26,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:26,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:55:26,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:55:26,931 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:26,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:26,931 INFO L85 PathProgramCache]: Analyzing trace with hash 29758463, now seen corresponding path program 1 times [2023-08-29 19:55:26,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:26,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604445501] [2023-08-29 19:55:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:26,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:27,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:27,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604445501] [2023-08-29 19:55:27,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604445501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:27,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:27,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32995290] [2023-08-29 19:55:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:27,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:55:27,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:27,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:55:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:55:27,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 313 [2023-08-29 19:55:27,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:27,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 313 [2023-08-29 19:55:27,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:27,240 INFO L130 PetriNetUnfolder]: 169/410 cut-off events. [2023-08-29 19:55:27,240 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-29 19:55:27,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 410 events. 169/410 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1785 event pairs, 110 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 948. Up to 238 conditions per place. [2023-08-29 19:55:27,243 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 70 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-08-29 19:55:27,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 334 flow [2023-08-29 19:55:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-29 19:55:27,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132055378061768 [2023-08-29 19:55:27,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-29 19:55:27,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-29 19:55:27,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:27,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-29 19:55:27,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,249 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,249 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 130 flow. Second operand 3 states and 388 transitions. [2023-08-29 19:55:27,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 334 flow [2023-08-29 19:55:27,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:55:27,252 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 139 flow [2023-08-29 19:55:27,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2023-08-29 19:55:27,253 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-08-29 19:55:27,254 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 139 flow [2023-08-29 19:55:27,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:27,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:55:27,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:55:27,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:27,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:27,255 INFO L85 PathProgramCache]: Analyzing trace with hash 29758586, now seen corresponding path program 1 times [2023-08-29 19:55:27,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:27,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106760218] [2023-08-29 19:55:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:27,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:27,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:27,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106760218] [2023-08-29 19:55:27,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106760218] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:27,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:27,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:27,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251543438] [2023-08-29 19:55:27,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:27,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:55:27,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:27,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:55:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:55:27,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 313 [2023-08-29 19:55:27,412 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,412 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:27,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 313 [2023-08-29 19:55:27,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:27,475 INFO L130 PetriNetUnfolder]: 159/397 cut-off events. [2023-08-29 19:55:27,475 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-29 19:55:27,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 397 events. 159/397 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1742 event pairs, 127 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 895. Up to 370 conditions per place. [2023-08-29 19:55:27,477 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 44 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-29 19:55:27,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 223 flow [2023-08-29 19:55:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-29 19:55:27,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39403620873269435 [2023-08-29 19:55:27,480 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-29 19:55:27,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-29 19:55:27,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:27,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-29 19:55:27,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,484 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 139 flow. Second operand 3 states and 370 transitions. [2023-08-29 19:55:27,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 223 flow [2023-08-29 19:55:27,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:27,489 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 132 flow [2023-08-29 19:55:27,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-29 19:55:27,491 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -20 predicate places. [2023-08-29 19:55:27,491 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 132 flow [2023-08-29 19:55:27,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:27,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:55:27,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:55:27,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:27,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash 29758464, now seen corresponding path program 1 times [2023-08-29 19:55:27,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:27,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807368807] [2023-08-29 19:55:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:27,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:27,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:27,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807368807] [2023-08-29 19:55:27,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807368807] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:27,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:27,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:27,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124440584] [2023-08-29 19:55:27,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:27,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:55:27,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:55:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:55:27,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 313 [2023-08-29 19:55:27,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:27,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 313 [2023-08-29 19:55:27,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:27,712 INFO L130 PetriNetUnfolder]: 155/387 cut-off events. [2023-08-29 19:55:27,712 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-08-29 19:55:27,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 387 events. 155/387 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1700 event pairs, 123 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 867. Up to 360 conditions per place. [2023-08-29 19:55:27,714 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-29 19:55:27,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 214 flow [2023-08-29 19:55:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-29 19:55:27,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40042598509052185 [2023-08-29 19:55:27,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-29 19:55:27,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-29 19:55:27,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:27,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-29 19:55:27,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,719 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 132 flow. Second operand 3 states and 376 transitions. [2023-08-29 19:55:27,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 214 flow [2023-08-29 19:55:27,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:27,721 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 129 flow [2023-08-29 19:55:27,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-08-29 19:55:27,721 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -21 predicate places. [2023-08-29 19:55:27,721 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 129 flow [2023-08-29 19:55:27,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:27,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:55:27,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:55:27,722 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:27,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash 922513359, now seen corresponding path program 1 times [2023-08-29 19:55:27,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:27,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602604563] [2023-08-29 19:55:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:27,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:27,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:27,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602604563] [2023-08-29 19:55:27,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602604563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:27,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:27,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:27,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728797680] [2023-08-29 19:55:27,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:27,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:55:27,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:27,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:55:27,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:55:27,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:55:27,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:27,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:55:27,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:27,917 INFO L130 PetriNetUnfolder]: 154/362 cut-off events. [2023-08-29 19:55:27,917 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-29 19:55:27,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 362 events. 154/362 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1473 event pairs, 72 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 814. Up to 137 conditions per place. [2023-08-29 19:55:27,919 INFO L137 encePairwiseOnDemand]: 304/313 looper letters, 60 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2023-08-29 19:55:27,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 319 flow [2023-08-29 19:55:27,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:55:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:55:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-29 19:55:27,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793929712460064 [2023-08-29 19:55:27,921 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-29 19:55:27,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-29 19:55:27,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:27,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-29 19:55:27,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,924 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,924 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 129 flow. Second operand 4 states and 475 transitions. [2023-08-29 19:55:27,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 319 flow [2023-08-29 19:55:27,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:27,926 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 168 flow [2023-08-29 19:55:27,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-29 19:55:27,926 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-08-29 19:55:27,927 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 168 flow [2023-08-29 19:55:27,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:27,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:27,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:55:27,927 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:27,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:27,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1775671262, now seen corresponding path program 1 times [2023-08-29 19:55:27,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:27,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063884165] [2023-08-29 19:55:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:27,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:27,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:27,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063884165] [2023-08-29 19:55:27,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063884165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:27,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:27,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:27,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578798682] [2023-08-29 19:55:27,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:27,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:27,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:27,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 313 [2023-08-29 19:55:27,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:27,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:27,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 313 [2023-08-29 19:55:27,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:28,038 INFO L130 PetriNetUnfolder]: 151/371 cut-off events. [2023-08-29 19:55:28,038 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2023-08-29 19:55:28,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 371 events. 151/371 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1565 event pairs, 50 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 910. Up to 338 conditions per place. [2023-08-29 19:55:28,040 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 42 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-29 19:55:28,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 260 flow [2023-08-29 19:55:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-29 19:55:28,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014909478168264 [2023-08-29 19:55:28,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-29 19:55:28,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-29 19:55:28,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:28,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-29 19:55:28,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,044 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 168 flow. Second operand 3 states and 377 transitions. [2023-08-29 19:55:28,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 260 flow [2023-08-29 19:55:28,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 255 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:28,046 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 165 flow [2023-08-29 19:55:28,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-08-29 19:55:28,047 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-08-29 19:55:28,047 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 165 flow [2023-08-29 19:55:28,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:28,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:28,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:55:28,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:28,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash -898009828, now seen corresponding path program 1 times [2023-08-29 19:55:28,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:28,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907941630] [2023-08-29 19:55:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:28,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:28,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:28,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907941630] [2023-08-29 19:55:28,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907941630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:28,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:28,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:28,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642692444] [2023-08-29 19:55:28,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:28,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:55:28,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:28,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:55:28,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:55:28,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 313 [2023-08-29 19:55:28,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:28,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 313 [2023-08-29 19:55:28,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:28,265 INFO L130 PetriNetUnfolder]: 146/357 cut-off events. [2023-08-29 19:55:28,265 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-08-29 19:55:28,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899 conditions, 357 events. 146/357 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1490 event pairs, 112 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 881. Up to 334 conditions per place. [2023-08-29 19:55:28,266 INFO L137 encePairwiseOnDemand]: 311/313 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-29 19:55:28,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 245 flow [2023-08-29 19:55:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-29 19:55:28,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951011714589989 [2023-08-29 19:55:28,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-29 19:55:28,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-29 19:55:28,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:28,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-29 19:55:28,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,270 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 165 flow. Second operand 3 states and 371 transitions. [2023-08-29 19:55:28,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 245 flow [2023-08-29 19:55:28,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 241 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:55:28,272 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 161 flow [2023-08-29 19:55:28,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-29 19:55:28,275 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-08-29 19:55:28,275 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 161 flow [2023-08-29 19:55:28,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:28,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:28,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:55:28,276 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:28,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:28,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2068501142, now seen corresponding path program 1 times [2023-08-29 19:55:28,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:28,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554717442] [2023-08-29 19:55:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:28,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:28,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:28,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554717442] [2023-08-29 19:55:28,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554717442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:28,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:28,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:55:28,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932345388] [2023-08-29 19:55:28,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:28,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:55:28,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:55:28,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:55:28,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 313 [2023-08-29 19:55:28,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:28,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 313 [2023-08-29 19:55:28,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:28,542 INFO L130 PetriNetUnfolder]: 134/316 cut-off events. [2023-08-29 19:55:28,543 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2023-08-29 19:55:28,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 316 events. 134/316 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1205 event pairs, 48 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 789. Up to 135 conditions per place. [2023-08-29 19:55:28,544 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 51 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2023-08-29 19:55:28,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 327 flow [2023-08-29 19:55:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:55:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:55:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 485 transitions. [2023-08-29 19:55:28,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38738019169329074 [2023-08-29 19:55:28,546 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 485 transitions. [2023-08-29 19:55:28,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 485 transitions. [2023-08-29 19:55:28,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:28,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 485 transitions. [2023-08-29 19:55:28,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,549 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,549 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 161 flow. Second operand 4 states and 485 transitions. [2023-08-29 19:55:28,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 327 flow [2023-08-29 19:55:28,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:28,551 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 196 flow [2023-08-29 19:55:28,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-08-29 19:55:28,551 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-08-29 19:55:28,552 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 196 flow [2023-08-29 19:55:28,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:28,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:28,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:55:28,552 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:28,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash 740294123, now seen corresponding path program 1 times [2023-08-29 19:55:28,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:28,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549503174] [2023-08-29 19:55:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:28,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:28,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:28,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549503174] [2023-08-29 19:55:28,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549503174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:28,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:28,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:28,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48805887] [2023-08-29 19:55:28,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:28,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:28,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 313 [2023-08-29 19:55:28,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:28,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 313 [2023-08-29 19:55:28,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:28,673 INFO L130 PetriNetUnfolder]: 131/313 cut-off events. [2023-08-29 19:55:28,674 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-29 19:55:28,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 313 events. 131/313 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1215 event pairs, 56 based on Foata normal form. 3/220 useless extension candidates. Maximal degree in co-relation 836. Up to 261 conditions per place. [2023-08-29 19:55:28,675 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 43 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2023-08-29 19:55:28,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 300 flow [2023-08-29 19:55:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-29 19:55:28,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40042598509052185 [2023-08-29 19:55:28,677 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-29 19:55:28,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-29 19:55:28,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:28,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-29 19:55:28,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,679 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,679 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 196 flow. Second operand 3 states and 376 transitions. [2023-08-29 19:55:28,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 300 flow [2023-08-29 19:55:28,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 292 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 19:55:28,681 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 196 flow [2023-08-29 19:55:28,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-29 19:55:28,682 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -15 predicate places. [2023-08-29 19:55:28,682 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 196 flow [2023-08-29 19:55:28,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:28,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:28,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:55:28,683 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:28,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash 740445031, now seen corresponding path program 1 times [2023-08-29 19:55:28,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:28,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781000170] [2023-08-29 19:55:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:28,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:28,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:28,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781000170] [2023-08-29 19:55:28,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781000170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:28,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:28,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:55:28,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908709758] [2023-08-29 19:55:28,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:28,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:55:28,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:55:28,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:55:28,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 313 [2023-08-29 19:55:28,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:28,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 313 [2023-08-29 19:55:28,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:28,899 INFO L130 PetriNetUnfolder]: 137/336 cut-off events. [2023-08-29 19:55:28,899 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-29 19:55:28,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 336 events. 137/336 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1284 event pairs, 20 based on Foata normal form. 3/242 useless extension candidates. Maximal degree in co-relation 887. Up to 202 conditions per place. [2023-08-29 19:55:28,901 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 61 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-29 19:55:28,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 387 flow [2023-08-29 19:55:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:55:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:55:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 676 transitions. [2023-08-29 19:55:28,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3599574014909478 [2023-08-29 19:55:28,903 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 676 transitions. [2023-08-29 19:55:28,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 676 transitions. [2023-08-29 19:55:28,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:28,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 676 transitions. [2023-08-29 19:55:28,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.66666666666667) internal successors, (676), 6 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) [2023-08-29 19:55:28,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,907 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,907 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 196 flow. Second operand 6 states and 676 transitions. [2023-08-29 19:55:28,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 387 flow [2023-08-29 19:55:28,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 383 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:28,909 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 207 flow [2023-08-29 19:55:28,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2023-08-29 19:55:28,909 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-29 19:55:28,909 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 207 flow [2023-08-29 19:55:28,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:28,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:28,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:28,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:55:28,910 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:28,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1396868391, now seen corresponding path program 1 times [2023-08-29 19:55:28,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:28,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586480639] [2023-08-29 19:55:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:28,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:28,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:28,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586480639] [2023-08-29 19:55:28,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586480639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:28,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:28,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:28,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370223225] [2023-08-29 19:55:28,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:28,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:28,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:28,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:29,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 313 [2023-08-29 19:55:29,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:29,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 313 [2023-08-29 19:55:29,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:29,066 INFO L130 PetriNetUnfolder]: 127/305 cut-off events. [2023-08-29 19:55:29,066 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-29 19:55:29,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 305 events. 127/305 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1138 event pairs, 27 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 871. Up to 209 conditions per place. [2023-08-29 19:55:29,068 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 37 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2023-08-29 19:55:29,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 45 transitions, 303 flow [2023-08-29 19:55:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-29 19:55:29,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706070287539936 [2023-08-29 19:55:29,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-29 19:55:29,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-29 19:55:29,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:29,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-29 19:55:29,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,072 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,073 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 207 flow. Second operand 3 states and 348 transitions. [2023-08-29 19:55:29,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 45 transitions, 303 flow [2023-08-29 19:55:29,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 45 transitions, 289 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 19:55:29,074 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 201 flow [2023-08-29 19:55:29,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=54, PETRI_TRANSITIONS=41} [2023-08-29 19:55:29,075 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2023-08-29 19:55:29,075 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 201 flow [2023-08-29 19:55:29,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:29,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:29,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:55:29,076 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:29,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:29,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1396868390, now seen corresponding path program 1 times [2023-08-29 19:55:29,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:29,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393052324] [2023-08-29 19:55:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:29,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:29,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:29,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393052324] [2023-08-29 19:55:29,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393052324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:29,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:29,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:29,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304173744] [2023-08-29 19:55:29,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:29,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:29,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 313 [2023-08-29 19:55:29,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:29,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 313 [2023-08-29 19:55:29,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:29,249 INFO L130 PetriNetUnfolder]: 123/302 cut-off events. [2023-08-29 19:55:29,249 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-08-29 19:55:29,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 302 events. 123/302 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1140 event pairs, 85 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 870. Up to 262 conditions per place. [2023-08-29 19:55:29,250 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 38 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2023-08-29 19:55:29,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 311 flow [2023-08-29 19:55:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-29 19:55:29,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865814696485623 [2023-08-29 19:55:29,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-29 19:55:29,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-29 19:55:29,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:29,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-29 19:55:29,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,255 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 201 flow. Second operand 3 states and 363 transitions. [2023-08-29 19:55:29,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 311 flow [2023-08-29 19:55:29,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 47 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:55:29,257 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 233 flow [2023-08-29 19:55:29,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=233, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-08-29 19:55:29,258 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -12 predicate places. [2023-08-29 19:55:29,258 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 233 flow [2023-08-29 19:55:29,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:29,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:29,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:55:29,258 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:29,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1396868386, now seen corresponding path program 1 times [2023-08-29 19:55:29,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:29,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790657056] [2023-08-29 19:55:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:29,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:29,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:29,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790657056] [2023-08-29 19:55:29,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790657056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:29,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:29,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:55:29,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250619735] [2023-08-29 19:55:29,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:29,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:55:29,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:55:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:55:29,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 313 [2023-08-29 19:55:29,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:29,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 313 [2023-08-29 19:55:29,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:29,411 INFO L130 PetriNetUnfolder]: 116/284 cut-off events. [2023-08-29 19:55:29,412 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2023-08-29 19:55:29,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 284 events. 116/284 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1031 event pairs, 27 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 885. Up to 185 conditions per place. [2023-08-29 19:55:29,413 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 38 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2023-08-29 19:55:29,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 328 flow [2023-08-29 19:55:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:55:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:55:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-29 19:55:29,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38338658146964855 [2023-08-29 19:55:29,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-29 19:55:29,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-29 19:55:29,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:29,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-29 19:55:29,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,417 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 233 flow. Second operand 3 states and 360 transitions. [2023-08-29 19:55:29,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 328 flow [2023-08-29 19:55:29,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:55:29,418 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 227 flow [2023-08-29 19:55:29,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-29 19:55:29,419 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2023-08-29 19:55:29,419 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 227 flow [2023-08-29 19:55:29,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:29,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:29,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:55:29,419 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:29,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash -167064850, now seen corresponding path program 1 times [2023-08-29 19:55:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:29,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479058348] [2023-08-29 19:55:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:29,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:29,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:29,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479058348] [2023-08-29 19:55:29,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479058348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:29,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:29,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:55:29,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183800205] [2023-08-29 19:55:29,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:29,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:55:29,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:55:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:55:29,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 313 [2023-08-29 19:55:29,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 99.66666666666667) internal successors, (598), 6 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) [2023-08-29 19:55:29,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:29,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 313 [2023-08-29 19:55:29,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:29,645 INFO L130 PetriNetUnfolder]: 107/258 cut-off events. [2023-08-29 19:55:29,646 INFO L131 PetriNetUnfolder]: For 268/268 co-relation queries the response was YES. [2023-08-29 19:55:29,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 853 conditions, 258 events. 107/258 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 862 event pairs, 21 based on Foata normal form. 5/245 useless extension candidates. Maximal degree in co-relation 829. Up to 177 conditions per place. [2023-08-29 19:55:29,647 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 35 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2023-08-29 19:55:29,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 323 flow [2023-08-29 19:55:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:55:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:55:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 419 transitions. [2023-08-29 19:55:29,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33466453674121405 [2023-08-29 19:55:29,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 419 transitions. [2023-08-29 19:55:29,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 419 transitions. [2023-08-29 19:55:29,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:29,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 419 transitions. [2023-08-29 19:55:29,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.75) internal successors, (419), 4 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) [2023-08-29 19:55:29,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,651 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:29,651 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 227 flow. Second operand 4 states and 419 transitions. [2023-08-29 19:55:29,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 323 flow [2023-08-29 19:55:29,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 302 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:55:29,653 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 214 flow [2023-08-29 19:55:29,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-29 19:55:29,653 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-08-29 19:55:29,653 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 214 flow [2023-08-29 19:55:29,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 99.66666666666667) internal successors, (598), 6 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) [2023-08-29 19:55:29,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:29,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:55:29,654 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:29,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:29,654 INFO L85 PathProgramCache]: Analyzing trace with hash -167064848, now seen corresponding path program 1 times [2023-08-29 19:55:29,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:29,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643574290] [2023-08-29 19:55:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:29,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:29,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:29,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643574290] [2023-08-29 19:55:29,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643574290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:29,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:29,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:55:29,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451365273] [2023-08-29 19:55:29,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:29,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 19:55:29,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:29,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 19:55:29,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:55:30,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 313 [2023-08-29 19:55:30,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 214 flow. Second operand has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:30,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:30,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 313 [2023-08-29 19:55:30,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:30,392 INFO L130 PetriNetUnfolder]: 109/266 cut-off events. [2023-08-29 19:55:30,392 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-08-29 19:55:30,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 266 events. 109/266 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 872 event pairs, 14 based on Foata normal form. 4/251 useless extension candidates. Maximal degree in co-relation 849. Up to 155 conditions per place. [2023-08-29 19:55:30,393 INFO L137 encePairwiseOnDemand]: 303/313 looper letters, 57 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2023-08-29 19:55:30,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 490 flow [2023-08-29 19:55:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:55:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:55:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 957 transitions. [2023-08-29 19:55:30,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30575079872204475 [2023-08-29 19:55:30,397 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 957 transitions. [2023-08-29 19:55:30,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 957 transitions. [2023-08-29 19:55:30,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:30,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 957 transitions. [2023-08-29 19:55:30,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 95.7) internal successors, (957), 10 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:30,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 313.0) internal successors, (3443), 11 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:30,403 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 313.0) internal successors, (3443), 11 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:30,403 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 214 flow. Second operand 10 states and 957 transitions. [2023-08-29 19:55:30,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 490 flow [2023-08-29 19:55:30,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 468 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:55:30,405 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 301 flow [2023-08-29 19:55:30,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=301, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-29 19:55:30,406 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -8 predicate places. [2023-08-29 19:55:30,406 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 301 flow [2023-08-29 19:55:30,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 91.0) internal successors, (728), 8 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:30,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:30,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:30,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:55:30,407 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:30,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:30,408 INFO L85 PathProgramCache]: Analyzing trace with hash -252358597, now seen corresponding path program 1 times [2023-08-29 19:55:30,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:30,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802006604] [2023-08-29 19:55:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:30,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:30,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802006604] [2023-08-29 19:55:30,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802006604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:55:30,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:55:30,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:55:30,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356329713] [2023-08-29 19:55:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:55:30,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:55:30,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:55:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:55:30,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 313 [2023-08-29 19:55:30,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:30,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:30,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 313 [2023-08-29 19:55:30,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:30,600 INFO L130 PetriNetUnfolder]: 86/227 cut-off events. [2023-08-29 19:55:30,601 INFO L131 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2023-08-29 19:55:30,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 227 events. 86/227 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 724 event pairs, 15 based on Foata normal form. 19/230 useless extension candidates. Maximal degree in co-relation 786. Up to 158 conditions per place. [2023-08-29 19:55:30,602 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 40 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-08-29 19:55:30,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 415 flow [2023-08-29 19:55:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:55:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:55:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 429 transitions. [2023-08-29 19:55:30,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3426517571884984 [2023-08-29 19:55:30,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 429 transitions. [2023-08-29 19:55:30,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 429 transitions. [2023-08-29 19:55:30,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:55:30,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 429 transitions. [2023-08-29 19:55:30,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:30,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:30,606 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:30,606 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 301 flow. Second operand 4 states and 429 transitions. [2023-08-29 19:55:30,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 415 flow [2023-08-29 19:55:30,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 393 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-29 19:55:30,608 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 295 flow [2023-08-29 19:55:30,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-08-29 19:55:30,609 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -10 predicate places. [2023-08-29 19:55:30,609 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 295 flow [2023-08-29 19:55:30,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:30,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:55:30,609 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:55:30,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:55:30,610 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:55:30,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:55:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash 766796576, now seen corresponding path program 1 times [2023-08-29 19:55:30,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:55:30,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751882613] [2023-08-29 19:55:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:30,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:55:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:31,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:55:31,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751882613] [2023-08-29 19:55:31,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751882613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:55:31,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192384096] [2023-08-29 19:55:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:55:31,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:55:31,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:55:31,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:55:31,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 19:55:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:55:31,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 19:55:31,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:55:31,205 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:55:31,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:55:31,296 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:55:31,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:55:31,611 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 19:55:31,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 191 [2023-08-29 19:55:31,638 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2023-08-29 19:55:31,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 201 [2023-08-29 19:55:31,656 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:55:31,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 156 [2023-08-29 19:55:31,670 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:55:31,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 148 [2023-08-29 19:55:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:55:31,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2023-08-29 19:55:31,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 19:55:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:31,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:55:32,020 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:55:32,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 192 [2023-08-29 19:55:32,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:55:32,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 193 [2023-08-29 19:55:32,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:55:32,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-29 19:55:32,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2023-08-29 19:55:32,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-08-29 19:55:32,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-08-29 19:55:32,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:55:32,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2023-08-29 19:55:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:55:32,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192384096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:55:32,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:55:32,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-29 19:55:32,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736029245] [2023-08-29 19:55:32,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:55:32,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 19:55:32,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:55:32,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 19:55:32,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=524, Unknown=3, NotChecked=0, Total=600 [2023-08-29 19:55:33,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 313 [2023-08-29 19:55:33,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 295 flow. Second operand has 25 states, 25 states have (on average 52.16) internal successors, (1304), 25 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:55:33,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:55:33,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 313 [2023-08-29 19:55:33,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:55:39,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:55:45,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:55:47,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:55:53,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:56:01,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:56:22,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:56:38,970 INFO L130 PetriNetUnfolder]: 281/802 cut-off events. [2023-08-29 19:56:38,971 INFO L131 PetriNetUnfolder]: For 1070/1070 co-relation queries the response was YES. [2023-08-29 19:56:38,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2718 conditions, 802 events. 281/802 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4147 event pairs, 23 based on Foata normal form. 27/755 useless extension candidates. Maximal degree in co-relation 2692. Up to 138 conditions per place. [2023-08-29 19:56:38,974 INFO L137 encePairwiseOnDemand]: 293/313 looper letters, 148 selfloop transitions, 124 changer transitions 0/273 dead transitions. [2023-08-29 19:56:38,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 273 transitions, 1940 flow [2023-08-29 19:56:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-29 19:56:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-29 19:56:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2805 transitions. [2023-08-29 19:56:38,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1757188498402556 [2023-08-29 19:56:38,983 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2805 transitions. [2023-08-29 19:56:38,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2805 transitions. [2023-08-29 19:56:38,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:38,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2805 transitions. [2023-08-29 19:56:38,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 55.0) internal successors, (2805), 51 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:39,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 313.0) internal successors, (16276), 52 states have internal predecessors, (16276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:39,005 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 313.0) internal successors, (16276), 52 states have internal predecessors, (16276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:39,006 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 295 flow. Second operand 51 states and 2805 transitions. [2023-08-29 19:56:39,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 273 transitions, 1940 flow [2023-08-29 19:56:39,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 273 transitions, 1864 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:56:39,013 INFO L231 Difference]: Finished difference. Result has 133 places, 162 transitions, 1446 flow [2023-08-29 19:56:39,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1446, PETRI_PLACES=133, PETRI_TRANSITIONS=162} [2023-08-29 19:56:39,014 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 66 predicate places. [2023-08-29 19:56:39,014 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 162 transitions, 1446 flow [2023-08-29 19:56:39,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.16) internal successors, (1304), 25 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:39,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:39,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:39,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 19:56:39,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-29 19:56:39,221 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:39,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:39,221 INFO L85 PathProgramCache]: Analyzing trace with hash 839167845, now seen corresponding path program 1 times [2023-08-29 19:56:39,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:39,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845201043] [2023-08-29 19:56:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:39,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:56:39,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845201043] [2023-08-29 19:56:39,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845201043] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:56:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116395131] [2023-08-29 19:56:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:39,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:56:39,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:56:39,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:56:39,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-29 19:56:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:39,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-29 19:56:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:56:39,567 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 19:56:39,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 19:56:39,609 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:56:39,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:56:39,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 19:56:39,740 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 19:56:39,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-29 19:56:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:39,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:56:39,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-29 19:56:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:39,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116395131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:56:39,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:56:39,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-29 19:56:39,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907767268] [2023-08-29 19:56:39,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:56:39,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:56:39,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:39,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:56:39,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:56:40,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 313 [2023-08-29 19:56:40,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 162 transitions, 1446 flow. Second operand has 16 states, 16 states have (on average 89.0625) internal successors, (1425), 16 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:40,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:40,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 313 [2023-08-29 19:56:40,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:40,611 INFO L130 PetriNetUnfolder]: 270/763 cut-off events. [2023-08-29 19:56:40,611 INFO L131 PetriNetUnfolder]: For 6321/6321 co-relation queries the response was YES. [2023-08-29 19:56:40,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4293 conditions, 763 events. 270/763 cut-off events. For 6321/6321 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3816 event pairs, 37 based on Foata normal form. 28/741 useless extension candidates. Maximal degree in co-relation 4238. Up to 477 conditions per place. [2023-08-29 19:56:40,618 INFO L137 encePairwiseOnDemand]: 306/313 looper letters, 140 selfloop transitions, 37 changer transitions 0/178 dead transitions. [2023-08-29 19:56:40,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 178 transitions, 1976 flow [2023-08-29 19:56:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:56:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:56:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 824 transitions. [2023-08-29 19:56:40,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29250976215832447 [2023-08-29 19:56:40,620 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 824 transitions. [2023-08-29 19:56:40,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 824 transitions. [2023-08-29 19:56:40,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:40,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 824 transitions. [2023-08-29 19:56:40,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.55555555555556) internal successors, (824), 9 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:40,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 313.0) internal successors, (3130), 10 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:40,625 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 313.0) internal successors, (3130), 10 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:40,625 INFO L175 Difference]: Start difference. First operand has 133 places, 162 transitions, 1446 flow. Second operand 9 states and 824 transitions. [2023-08-29 19:56:40,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 178 transitions, 1976 flow [2023-08-29 19:56:40,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 178 transitions, 1828 flow, removed 61 selfloop flow, removed 6 redundant places. [2023-08-29 19:56:40,645 INFO L231 Difference]: Finished difference. Result has 133 places, 161 transitions, 1377 flow [2023-08-29 19:56:40,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1377, PETRI_PLACES=133, PETRI_TRANSITIONS=161} [2023-08-29 19:56:40,645 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 66 predicate places. [2023-08-29 19:56:40,645 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 161 transitions, 1377 flow [2023-08-29 19:56:40,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 89.0625) internal successors, (1425), 16 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:40,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:40,646 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:40,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-29 19:56:40,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:56:40,852 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:40,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:40,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1013368158, now seen corresponding path program 1 times [2023-08-29 19:56:40,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:40,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022657524] [2023-08-29 19:56:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:40,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:40,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:40,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022657524] [2023-08-29 19:56:40,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022657524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:56:40,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557255800] [2023-08-29 19:56:40,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:40,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:56:40,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:56:40,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:56:40,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-29 19:56:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:41,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 19:56:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:56:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:41,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:56:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:41,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557255800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:56:41,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:56:41,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-29 19:56:41,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353903701] [2023-08-29 19:56:41,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:56:41,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:56:41,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:56:41,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:56:41,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:56:41,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 161 transitions, 1377 flow. Second operand has 11 states, 11 states have (on average 105.0) internal successors, (1155), 11 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:41,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:41,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:56:41,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:41,779 INFO L130 PetriNetUnfolder]: 324/896 cut-off events. [2023-08-29 19:56:41,779 INFO L131 PetriNetUnfolder]: For 9832/9832 co-relation queries the response was YES. [2023-08-29 19:56:41,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5344 conditions, 896 events. 324/896 cut-off events. For 9832/9832 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 4170 event pairs, 36 based on Foata normal form. 53/892 useless extension candidates. Maximal degree in co-relation 5291. Up to 188 conditions per place. [2023-08-29 19:56:41,789 INFO L137 encePairwiseOnDemand]: 303/313 looper letters, 199 selfloop transitions, 57 changer transitions 7/264 dead transitions. [2023-08-29 19:56:41,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 264 transitions, 3172 flow [2023-08-29 19:56:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 19:56:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 19:56:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2388 transitions. [2023-08-29 19:56:41,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467905896020912 [2023-08-29 19:56:41,793 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2388 transitions. [2023-08-29 19:56:41,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2388 transitions. [2023-08-29 19:56:41,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:41,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2388 transitions. [2023-08-29 19:56:41,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 108.54545454545455) internal successors, (2388), 22 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:41,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 313.0) internal successors, (7199), 23 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:41,803 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 313.0) internal successors, (7199), 23 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:41,803 INFO L175 Difference]: Start difference. First operand has 133 places, 161 transitions, 1377 flow. Second operand 22 states and 2388 transitions. [2023-08-29 19:56:41,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 264 transitions, 3172 flow [2023-08-29 19:56:41,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 264 transitions, 2799 flow, removed 154 selfloop flow, removed 16 redundant places. [2023-08-29 19:56:41,829 INFO L231 Difference]: Finished difference. Result has 131 places, 139 transitions, 1337 flow [2023-08-29 19:56:41,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1337, PETRI_PLACES=131, PETRI_TRANSITIONS=139} [2023-08-29 19:56:41,829 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 64 predicate places. [2023-08-29 19:56:41,830 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 139 transitions, 1337 flow [2023-08-29 19:56:41,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 105.0) internal successors, (1155), 11 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:41,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:41,830 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:41,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-29 19:56:42,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:56:42,035 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:42,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1850938641, now seen corresponding path program 1 times [2023-08-29 19:56:42,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:42,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949332701] [2023-08-29 19:56:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:42,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:42,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:42,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949332701] [2023-08-29 19:56:42,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949332701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:56:42,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171629184] [2023-08-29 19:56:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:42,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:56:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:56:42,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:56:42,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-29 19:56:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 19:56:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:56:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:42,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:56:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:42,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171629184] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:56:42,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:56:42,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-29 19:56:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444473279] [2023-08-29 19:56:42,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:56:42,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 19:56:42,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:42,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 19:56:42,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-08-29 19:56:42,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:56:42,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 139 transitions, 1337 flow. Second operand has 13 states, 13 states have (on average 106.15384615384616) internal successors, (1380), 13 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:42,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:42,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:56:42,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:43,415 INFO L130 PetriNetUnfolder]: 408/1126 cut-off events. [2023-08-29 19:56:43,415 INFO L131 PetriNetUnfolder]: For 11512/11512 co-relation queries the response was YES. [2023-08-29 19:56:43,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6418 conditions, 1126 events. 408/1126 cut-off events. For 11512/11512 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5071 event pairs, 37 based on Foata normal form. 44/1119 useless extension candidates. Maximal degree in co-relation 6368. Up to 257 conditions per place. [2023-08-29 19:56:43,423 INFO L137 encePairwiseOnDemand]: 304/313 looper letters, 267 selfloop transitions, 38 changer transitions 1/307 dead transitions. [2023-08-29 19:56:43,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 307 transitions, 3540 flow [2023-08-29 19:56:43,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 19:56:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 19:56:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2319 transitions. [2023-08-29 19:56:43,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35280693747147424 [2023-08-29 19:56:43,426 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2319 transitions. [2023-08-29 19:56:43,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2319 transitions. [2023-08-29 19:56:43,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:43,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2319 transitions. [2023-08-29 19:56:43,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 110.42857142857143) internal successors, (2319), 21 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:43,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 313.0) internal successors, (6886), 22 states have internal predecessors, (6886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:43,433 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 313.0) internal successors, (6886), 22 states have internal predecessors, (6886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:43,433 INFO L175 Difference]: Start difference. First operand has 131 places, 139 transitions, 1337 flow. Second operand 21 states and 2319 transitions. [2023-08-29 19:56:43,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 307 transitions, 3540 flow [2023-08-29 19:56:43,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 307 transitions, 3360 flow, removed 79 selfloop flow, removed 9 redundant places. [2023-08-29 19:56:43,450 INFO L231 Difference]: Finished difference. Result has 144 places, 132 transitions, 1285 flow [2023-08-29 19:56:43,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=1049, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1285, PETRI_PLACES=144, PETRI_TRANSITIONS=132} [2023-08-29 19:56:43,450 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 77 predicate places. [2023-08-29 19:56:43,450 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 132 transitions, 1285 flow [2023-08-29 19:56:43,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.15384615384616) internal successors, (1380), 13 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:43,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:43,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:43,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-29 19:56:43,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:56:43,670 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:43,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:43,671 INFO L85 PathProgramCache]: Analyzing trace with hash -875922438, now seen corresponding path program 1 times [2023-08-29 19:56:43,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:43,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146966758] [2023-08-29 19:56:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:43,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-29 19:56:44,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146966758] [2023-08-29 19:56:44,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146966758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:56:44,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:56:44,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:56:44,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317779139] [2023-08-29 19:56:44,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:56:44,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:56:44,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:56:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:56:44,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 313 [2023-08-29 19:56:44,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 132 transitions, 1285 flow. Second operand has 6 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:44,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:44,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 313 [2023-08-29 19:56:44,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:56:44,549 INFO L130 PetriNetUnfolder]: 418/1244 cut-off events. [2023-08-29 19:56:44,549 INFO L131 PetriNetUnfolder]: For 10440/10440 co-relation queries the response was YES. [2023-08-29 19:56:44,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6597 conditions, 1244 events. 418/1244 cut-off events. For 10440/10440 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6223 event pairs, 53 based on Foata normal form. 27/1210 useless extension candidates. Maximal degree in co-relation 6543. Up to 506 conditions per place. [2023-08-29 19:56:44,558 INFO L137 encePairwiseOnDemand]: 301/313 looper letters, 86 selfloop transitions, 75 changer transitions 0/162 dead transitions. [2023-08-29 19:56:44,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 162 transitions, 1904 flow [2023-08-29 19:56:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:56:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:56:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 704 transitions. [2023-08-29 19:56:44,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3213144682793245 [2023-08-29 19:56:44,559 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 704 transitions. [2023-08-29 19:56:44,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 704 transitions. [2023-08-29 19:56:44,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:56:44,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 704 transitions. [2023-08-29 19:56:44,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 100.57142857142857) internal successors, (704), 7 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:44,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 313.0) internal successors, (2504), 8 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:44,564 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 313.0) internal successors, (2504), 8 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:44,564 INFO L175 Difference]: Start difference. First operand has 144 places, 132 transitions, 1285 flow. Second operand 7 states and 704 transitions. [2023-08-29 19:56:44,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 162 transitions, 1904 flow [2023-08-29 19:56:44,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 162 transitions, 1862 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-29 19:56:44,583 INFO L231 Difference]: Finished difference. Result has 142 places, 151 transitions, 1681 flow [2023-08-29 19:56:44,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1681, PETRI_PLACES=142, PETRI_TRANSITIONS=151} [2023-08-29 19:56:44,584 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 75 predicate places. [2023-08-29 19:56:44,584 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 151 transitions, 1681 flow [2023-08-29 19:56:44,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 97.66666666666667) internal successors, (586), 6 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:44,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:56:44,584 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:56:44,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 19:56:44,584 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:56:44,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:56:44,585 INFO L85 PathProgramCache]: Analyzing trace with hash -113547920, now seen corresponding path program 1 times [2023-08-29 19:56:44,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:56:44,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967759233] [2023-08-29 19:56:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:56:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-29 19:56:45,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:56:45,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967759233] [2023-08-29 19:56:45,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967759233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:56:45,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535391214] [2023-08-29 19:56:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:56:45,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:56:45,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:56:45,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:56:45,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-29 19:56:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:56:45,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-29 19:56:45,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:56:45,671 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:56:45,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:56:45,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-08-29 19:56:45,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-29 19:56:45,879 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:56:45,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:56:46,162 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 19:56:46,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 191 [2023-08-29 19:56:46,178 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2023-08-29 19:56:46,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 191 treesize of output 196 [2023-08-29 19:56:46,190 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:56:46,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 156 [2023-08-29 19:56:46,199 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:56:46,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 148 [2023-08-29 19:56:46,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2023-08-29 19:56:46,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-29 19:56:46,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 19:56:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:56:46,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:56:46,316 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_714) |c_~#top~0.base|) |c_~#top~0.offset|)))) is different from false [2023-08-29 19:56:46,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:56:46,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 201 [2023-08-29 19:56:46,453 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:56:46,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 184 [2023-08-29 19:56:46,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:56:46,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-29 19:56:46,641 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:56:46,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-29 19:56:46,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-29 19:56:46,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:56:46,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-29 19:56:46,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2023-08-29 19:56:46,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-29 19:56:46,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-29 19:56:46,671 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-29 19:56:46,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2023-08-29 19:56:46,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-08-29 19:56:46,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:56:46,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 70 [2023-08-29 19:56:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-29 19:56:47,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535391214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:56:47,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:56:47,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-08-29 19:56:47,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411279105] [2023-08-29 19:56:47,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:56:47,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-29 19:56:47,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:56:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-29 19:56:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=881, Unknown=5, NotChecked=60, Total=1056 [2023-08-29 19:56:47,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 313 [2023-08-29 19:56:47,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 151 transitions, 1681 flow. Second operand has 33 states, 33 states have (on average 53.09090909090909) internal successors, (1752), 33 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:56:47,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:56:47,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 313 [2023-08-29 19:56:47,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:53,269 INFO L130 PetriNetUnfolder]: 1130/3273 cut-off events. [2023-08-29 19:57:53,269 INFO L131 PetriNetUnfolder]: For 39709/39709 co-relation queries the response was YES. [2023-08-29 19:57:53,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20523 conditions, 3273 events. 1130/3273 cut-off events. For 39709/39709 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 20557 event pairs, 70 based on Foata normal form. 105/3206 useless extension candidates. Maximal degree in co-relation 20467. Up to 719 conditions per place. [2023-08-29 19:57:53,295 INFO L137 encePairwiseOnDemand]: 294/313 looper letters, 428 selfloop transitions, 317 changer transitions 1/747 dead transitions. [2023-08-29 19:57:53,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 747 transitions, 10163 flow [2023-08-29 19:57:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-08-29 19:57:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2023-08-29 19:57:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 5825 transitions. [2023-08-29 19:57:53,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1755681475676653 [2023-08-29 19:57:53,312 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 5825 transitions. [2023-08-29 19:57:53,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 5825 transitions. [2023-08-29 19:57:53,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:53,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 5825 transitions. [2023-08-29 19:57:53,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 54.95283018867924) internal successors, (5825), 106 states have internal predecessors, (5825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:53,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 313.0) internal successors, (33491), 107 states have internal predecessors, (33491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:53,349 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 313.0) internal successors, (33491), 107 states have internal predecessors, (33491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:53,349 INFO L175 Difference]: Start difference. First operand has 142 places, 151 transitions, 1681 flow. Second operand 106 states and 5825 transitions. [2023-08-29 19:57:53,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 747 transitions, 10163 flow [2023-08-29 19:57:53,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 747 transitions, 9318 flow, removed 301 selfloop flow, removed 2 redundant places. [2023-08-29 19:57:53,425 INFO L231 Difference]: Finished difference. Result has 273 places, 411 transitions, 5432 flow [2023-08-29 19:57:53,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=5432, PETRI_PLACES=273, PETRI_TRANSITIONS=411} [2023-08-29 19:57:53,425 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 206 predicate places. [2023-08-29 19:57:53,426 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 411 transitions, 5432 flow [2023-08-29 19:57:53,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 53.09090909090909) internal successors, (1752), 33 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:53,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:53,427 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:53,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-29 19:57:53,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-29 19:57:53,633 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:53,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1851689517, now seen corresponding path program 2 times [2023-08-29 19:57:53,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:53,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135482681] [2023-08-29 19:57:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:53,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:53,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:53,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135482681] [2023-08-29 19:57:53,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135482681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:57:53,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939858545] [2023-08-29 19:57:53,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:57:53,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:53,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:57:53,963 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:57:53,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-29 19:57:54,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:57:54,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:57:54,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 19:57:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:57:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 72 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:54,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:57:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:54,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939858545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:57:54,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:57:54,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-29 19:57:54,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442052341] [2023-08-29 19:57:54,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:57:54,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 19:57:54,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:54,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 19:57:54,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-08-29 19:57:54,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:57:54,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 411 transitions, 5432 flow. Second operand has 23 states, 23 states have (on average 107.65217391304348) internal successors, (2476), 23 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:54,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:54,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:57:54,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:55,611 INFO L130 PetriNetUnfolder]: 680/2013 cut-off events. [2023-08-29 19:57:55,611 INFO L131 PetriNetUnfolder]: For 31304/31304 co-relation queries the response was YES. [2023-08-29 19:57:55,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15309 conditions, 2013 events. 680/2013 cut-off events. For 31304/31304 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 10865 event pairs, 47 based on Foata normal form. 56/2068 useless extension candidates. Maximal degree in co-relation 15224. Up to 622 conditions per place. [2023-08-29 19:57:55,626 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 340 selfloop transitions, 85 changer transitions 3/429 dead transitions. [2023-08-29 19:57:55,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 429 transitions, 6735 flow [2023-08-29 19:57:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 19:57:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 19:57:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2564 transitions. [2023-08-29 19:57:55,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34132055378061765 [2023-08-29 19:57:55,629 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2564 transitions. [2023-08-29 19:57:55,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2564 transitions. [2023-08-29 19:57:55,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:55,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2564 transitions. [2023-08-29 19:57:55,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 106.83333333333333) internal successors, (2564), 24 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:55,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 313.0) internal successors, (7825), 25 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:55,637 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 313.0) internal successors, (7825), 25 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:55,637 INFO L175 Difference]: Start difference. First operand has 273 places, 411 transitions, 5432 flow. Second operand 24 states and 2564 transitions. [2023-08-29 19:57:55,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 429 transitions, 6735 flow [2023-08-29 19:57:55,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 429 transitions, 5932 flow, removed 324 selfloop flow, removed 39 redundant places. [2023-08-29 19:57:55,705 INFO L231 Difference]: Finished difference. Result has 232 places, 317 transitions, 3651 flow [2023-08-29 19:57:55,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3651, PETRI_PLACES=232, PETRI_TRANSITIONS=317} [2023-08-29 19:57:55,706 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 165 predicate places. [2023-08-29 19:57:55,706 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 317 transitions, 3651 flow [2023-08-29 19:57:55,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 107.65217391304348) internal successors, (2476), 23 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:55,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:55,707 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:55,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-29 19:57:55,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:55,913 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:55,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:55,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1835615229, now seen corresponding path program 2 times [2023-08-29 19:57:55,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:55,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206949098] [2023-08-29 19:57:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:55,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:56,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:56,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206949098] [2023-08-29 19:57:56,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206949098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:57:56,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084319429] [2023-08-29 19:57:56,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:57:56,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:57:56,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:57:56,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-29 19:57:56,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:57:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:57:56,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 19:57:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:57:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:56,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:57:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:56,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084319429] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:57:56,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:57:56,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-29 19:57:56,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841133970] [2023-08-29 19:57:56,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:57:56,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:57:56,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:56,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:57:56,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:57:57,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:57:57,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 317 transitions, 3651 flow. Second operand has 21 states, 21 states have (on average 108.0) internal successors, (2268), 21 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:57:57,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:57,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:57:57,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:02,069 INFO L130 PetriNetUnfolder]: 2711/7770 cut-off events. [2023-08-29 19:58:02,069 INFO L131 PetriNetUnfolder]: For 97900/97900 co-relation queries the response was YES. [2023-08-29 19:58:02,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55345 conditions, 7770 events. 2711/7770 cut-off events. For 97900/97900 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 52582 event pairs, 176 based on Foata normal form. 168/7937 useless extension candidates. Maximal degree in co-relation 55280. Up to 1773 conditions per place. [2023-08-29 19:58:02,163 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 1543 selfloop transitions, 161 changer transitions 5/1710 dead transitions. [2023-08-29 19:58:02,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 1710 transitions, 23825 flow [2023-08-29 19:58:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-29 19:58:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-29 19:58:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4104 transitions. [2023-08-29 19:58:02,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35437354287194545 [2023-08-29 19:58:02,168 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4104 transitions. [2023-08-29 19:58:02,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4104 transitions. [2023-08-29 19:58:02,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:02,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4104 transitions. [2023-08-29 19:58:02,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 110.91891891891892) internal successors, (4104), 37 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:02,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 313.0) internal successors, (11894), 38 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:02,181 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 313.0) internal successors, (11894), 38 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:02,181 INFO L175 Difference]: Start difference. First operand has 232 places, 317 transitions, 3651 flow. Second operand 37 states and 4104 transitions. [2023-08-29 19:58:02,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 1710 transitions, 23825 flow [2023-08-29 19:58:02,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1710 transitions, 23396 flow, removed 18 selfloop flow, removed 18 redundant places. [2023-08-29 19:58:02,580 INFO L231 Difference]: Finished difference. Result has 264 places, 428 transitions, 5602 flow [2023-08-29 19:58:02,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5602, PETRI_PLACES=264, PETRI_TRANSITIONS=428} [2023-08-29 19:58:02,581 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 197 predicate places. [2023-08-29 19:58:02,581 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 428 transitions, 5602 flow [2023-08-29 19:58:02,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 108.0) internal successors, (2268), 21 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:02,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:02,582 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:02,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-29 19:58:02,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:02,788 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:02,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1866334070, now seen corresponding path program 2 times [2023-08-29 19:58:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:02,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748381482] [2023-08-29 19:58:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:02,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-08-29 19:58:03,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:03,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748381482] [2023-08-29 19:58:03,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748381482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:03,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907715180] [2023-08-29 19:58:03,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:58:03,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:03,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:03,609 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:58:03,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-29 19:58:03,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:58:03,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-29 19:58:03,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:03,873 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:58:03,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:58:04,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:58:04,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2023-08-29 19:58:04,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-08-29 19:58:04,359 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:58:04,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 19:58:04,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:58:04,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-29 19:58:04,465 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-29 19:58:04,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 19:58:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:04,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:04,775 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-08-29 19:58:04,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 200 [2023-08-29 19:58:04,799 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:58:04,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 184 [2023-08-29 19:58:04,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:58:04,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-29 19:58:04,917 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:58:04,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-29 19:58:04,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-08-29 19:58:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:05,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907715180] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:05,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:05,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 14] total 33 [2023-08-29 19:58:05,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077549688] [2023-08-29 19:58:05,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:05,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-29 19:58:05,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:05,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-29 19:58:05,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2023-08-29 19:58:07,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 313 [2023-08-29 19:58:07,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 428 transitions, 5602 flow. Second operand has 35 states, 35 states have (on average 80.14285714285714) internal successors, (2805), 35 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:07,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:07,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 313 [2023-08-29 19:58:07,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:12,964 INFO L130 PetriNetUnfolder]: 2711/7904 cut-off events. [2023-08-29 19:58:12,965 INFO L131 PetriNetUnfolder]: For 103088/103088 co-relation queries the response was YES. [2023-08-29 19:58:13,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56399 conditions, 7904 events. 2711/7904 cut-off events. For 103088/103088 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 54597 event pairs, 215 based on Foata normal form. 25/7928 useless extension candidates. Maximal degree in co-relation 56320. Up to 2175 conditions per place. [2023-08-29 19:58:13,075 INFO L137 encePairwiseOnDemand]: 300/313 looper letters, 238 selfloop transitions, 388 changer transitions 5/632 dead transitions. [2023-08-29 19:58:13,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 632 transitions, 9633 flow [2023-08-29 19:58:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-29 19:58:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-29 19:58:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4822 transitions. [2023-08-29 19:58:13,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2525532917823286 [2023-08-29 19:58:13,093 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4822 transitions. [2023-08-29 19:58:13,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4822 transitions. [2023-08-29 19:58:13,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:13,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4822 transitions. [2023-08-29 19:58:13,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 79.04918032786885) internal successors, (4822), 61 states have internal predecessors, (4822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:13,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 313.0) internal successors, (19406), 62 states have internal predecessors, (19406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:13,111 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 313.0) internal successors, (19406), 62 states have internal predecessors, (19406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:13,111 INFO L175 Difference]: Start difference. First operand has 264 places, 428 transitions, 5602 flow. Second operand 61 states and 4822 transitions. [2023-08-29 19:58:13,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 632 transitions, 9633 flow [2023-08-29 19:58:13,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 632 transitions, 9564 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-08-29 19:58:13,602 INFO L231 Difference]: Finished difference. Result has 308 places, 485 transitions, 7022 flow [2023-08-29 19:58:13,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=5490, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=7022, PETRI_PLACES=308, PETRI_TRANSITIONS=485} [2023-08-29 19:58:13,604 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 241 predicate places. [2023-08-29 19:58:13,604 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 485 transitions, 7022 flow [2023-08-29 19:58:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 80.14285714285714) internal successors, (2805), 35 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:13,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:13,604 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:13,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-29 19:58:13,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-29 19:58:13,811 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:13,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:13,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1438216747, now seen corresponding path program 3 times [2023-08-29 19:58:13,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:13,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727932934] [2023-08-29 19:58:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:13,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:14,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:14,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727932934] [2023-08-29 19:58:14,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727932934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:14,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822370871] [2023-08-29 19:58:14,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:58:14,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:14,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:14,866 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:58:14,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-29 19:58:27,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-08-29 19:58:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:27,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-29 19:58:27,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:28,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-29 19:58:28,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-08-29 19:58:28,278 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:58:28,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-08-29 19:58:28,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:58:28,453 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-29 19:58:28,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-29 19:58:28,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:58:28,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-29 19:58:28,599 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:58:28,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-29 19:58:28,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:58:28,696 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-29 19:58:28,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2023-08-29 19:58:28,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-08-29 19:58:28,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:58:28,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-29 19:58:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:28,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:29,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:58:29,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2023-08-29 19:58:29,089 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:58:29,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2023-08-29 19:58:29,558 INFO L321 Elim1Store]: treesize reduction 25, result has 50.0 percent of original size [2023-08-29 19:58:29,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 205 treesize of output 220 [2023-08-29 19:58:29,600 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-08-29 19:58:29,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 207 treesize of output 201 [2023-08-29 19:58:29,621 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-08-29 19:58:29,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 201 treesize of output 191 [2023-08-29 19:58:29,671 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-29 19:58:29,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-08-29 19:58:29,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-08-29 19:58:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:30,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822370871] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:30,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:30,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 23] total 62 [2023-08-29 19:58:30,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107112678] [2023-08-29 19:58:30,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:30,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-08-29 19:58:30,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-08-29 19:58:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=3113, Unknown=0, NotChecked=0, Total=4032 [2023-08-29 19:58:33,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 313 [2023-08-29 19:58:33,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 485 transitions, 7022 flow. Second operand has 64 states, 64 states have (on average 82.03125) internal successors, (5250), 64 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:58:33,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:33,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 313 [2023-08-29 19:58:33,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:59:18,124 INFO L130 PetriNetUnfolder]: 5466/15869 cut-off events. [2023-08-29 19:59:18,124 INFO L131 PetriNetUnfolder]: For 249228/249228 co-relation queries the response was YES. [2023-08-29 19:59:18,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122707 conditions, 15869 events. 5466/15869 cut-off events. For 249228/249228 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 108883 event pairs, 299 based on Foata normal form. 381/16249 useless extension candidates. Maximal degree in co-relation 122626. Up to 3576 conditions per place. [2023-08-29 19:59:18,347 INFO L137 encePairwiseOnDemand]: 297/313 looper letters, 3104 selfloop transitions, 469 changer transitions 14/3588 dead transitions. [2023-08-29 19:59:18,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 3588 transitions, 56317 flow [2023-08-29 19:59:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-29 19:59:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-29 19:59:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8075 transitions. [2023-08-29 19:59:18,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2659662066466849 [2023-08-29 19:59:18,354 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8075 transitions. [2023-08-29 19:59:18,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8075 transitions. [2023-08-29 19:59:18,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:18,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8075 transitions. [2023-08-29 19:59:18,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 83.24742268041237) internal successors, (8075), 97 states have internal predecessors, (8075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:59:18,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 313.0) internal successors, (30674), 98 states have internal predecessors, (30674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:59:18,385 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 313.0) internal successors, (30674), 98 states have internal predecessors, (30674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:59:18,385 INFO L175 Difference]: Start difference. First operand has 308 places, 485 transitions, 7022 flow. Second operand 97 states and 8075 transitions. [2023-08-29 19:59:18,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 3588 transitions, 56317 flow [2023-08-29 19:59:19,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 3588 transitions, 49147 flow, removed 802 selfloop flow, removed 44 redundant places. [2023-08-29 19:59:20,017 INFO L231 Difference]: Finished difference. Result has 417 places, 797 transitions, 12259 flow [2023-08-29 19:59:20,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=4303, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=12259, PETRI_PLACES=417, PETRI_TRANSITIONS=797} [2023-08-29 19:59:20,018 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 350 predicate places. [2023-08-29 19:59:20,018 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 797 transitions, 12259 flow [2023-08-29 19:59:20,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 82.03125) internal successors, (5250), 64 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:59:20,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:20,019 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:59:20,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-29 19:59:20,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-29 19:59:20,234 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:59:20,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:20,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1645531525, now seen corresponding path program 4 times [2023-08-29 19:59:20,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:20,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138735769] [2023-08-29 19:59:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:20,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 4530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:59:23,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138735769] [2023-08-29 19:59:23,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138735769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:59:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785152729] [2023-08-29 19:59:23,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 19:59:23,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:59:23,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:59:23,083 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:59:23,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-29 20:00:22,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 20:00:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 20:00:22,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 4144 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-29 20:00:22,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:00:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 4530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:00:23,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 20:00:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 4530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:00:24,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785152729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 20:00:24,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 20:00:24,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 67 [2023-08-29 20:00:24,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425676319] [2023-08-29 20:00:24,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 20:00:24,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-29 20:00:24,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:00:24,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-29 20:00:24,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=665, Invalid=4027, Unknown=0, NotChecked=0, Total=4692 [2023-08-29 20:00:26,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 20:00:26,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 797 transitions, 12259 flow. Second operand has 69 states, 69 states have (on average 110.08695652173913) internal successors, (7596), 69 states have internal predecessors, (7596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:00:26,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:00:26,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 20:00:26,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:00:37,327 INFO L130 PetriNetUnfolder]: 1881/5806 cut-off events. [2023-08-29 20:00:37,327 INFO L131 PetriNetUnfolder]: For 130520/130520 co-relation queries the response was YES. [2023-08-29 20:00:37,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48621 conditions, 5806 events. 1881/5806 cut-off events. For 130520/130520 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 29372 event pairs, 96 based on Foata normal form. 84/5889 useless extension candidates. Maximal degree in co-relation 48496. Up to 1312 conditions per place. [2023-08-29 20:00:37,394 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 1390 selfloop transitions, 169 changer transitions 31/1591 dead transitions. [2023-08-29 20:00:37,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1591 transitions, 27610 flow [2023-08-29 20:00:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-29 20:00:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-29 20:00:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 7959 transitions. [2023-08-29 20:00:37,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3483303426845814 [2023-08-29 20:00:37,400 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 7959 transitions. [2023-08-29 20:00:37,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 7959 transitions. [2023-08-29 20:00:37,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:00:37,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 7959 transitions. [2023-08-29 20:00:37,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 109.02739726027397) internal successors, (7959), 73 states have internal predecessors, (7959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:00:37,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 313.0) internal successors, (23162), 74 states have internal predecessors, (23162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:00:37,418 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 313.0) internal successors, (23162), 74 states have internal predecessors, (23162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:00:37,418 INFO L175 Difference]: Start difference. First operand has 417 places, 797 transitions, 12259 flow. Second operand 73 states and 7959 transitions. [2023-08-29 20:00:37,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1591 transitions, 27610 flow [2023-08-29 20:00:37,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1591 transitions, 26846 flow, removed 265 selfloop flow, removed 45 redundant places. [2023-08-29 20:00:37,963 INFO L231 Difference]: Finished difference. Result has 450 places, 592 transitions, 8428 flow [2023-08-29 20:00:37,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=8428, PETRI_PLACES=450, PETRI_TRANSITIONS=592} [2023-08-29 20:00:37,964 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 383 predicate places. [2023-08-29 20:00:37,964 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 592 transitions, 8428 flow [2023-08-29 20:00:37,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 110.08695652173913) internal successors, (7596), 69 states have internal predecessors, (7596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 20:00:37,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:00:37,966 INFO L208 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 20:00:38,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-29 20:00:38,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-29 20:00:38,181 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 20:00:38,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:00:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash 263343493, now seen corresponding path program 5 times [2023-08-29 20:00:38,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:00:38,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966810464] [2023-08-29 20:00:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:00:38,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:00:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:00:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5152 backedges. 5025 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 20:00:40,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:00:40,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966810464] [2023-08-29 20:00:40,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966810464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 20:00:40,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175678964] [2023-08-29 20:00:40,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-29 20:00:40,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 20:00:40,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 20:00:40,402 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 20:00:40,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process Killed by 15