./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.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_longest-2.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 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc --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 19:56:54,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:56:54,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:56:54,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:56:54,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:56:54,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:56:54,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:56:54,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:56:54,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:56:54,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:56:54,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:56:54,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:56:54,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:56:54,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:56:54,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:56:54,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:56:54,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:56:54,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:56:54,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:56:54,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:56:54,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:56:54,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:56:54,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:56:54,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:56:54,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:56:54,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:56:54,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:56:54,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:56:54,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:56:54,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:56:54,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:56:54,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:56:54,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:56:54,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:56:54,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:56:54,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:56:54,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:56:54,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:56:54,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:56:54,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:56:54,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:56:54,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:56:54,425 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:56:54,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:56:54,427 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:56:54,427 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:56:54,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:56:54,428 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:56:54,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:56:54,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:56:54,428 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:56:54,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:56:54,429 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:56:54,430 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:56:54,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:56:54,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:56:54,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:56:54,430 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:56:54,430 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:56:54,431 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:56:54,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:56:54,431 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:56:54,431 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:56:54,431 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:56:54,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:56:54,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:56:54,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:56:54,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:56:54,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:56:54,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:56:54,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:56:54,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:56:54,433 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:56:54,433 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:56:54,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:56:54,433 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:56:54,434 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:56:54,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:56:54,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:56:54,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:56:54,759 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:56:54,759 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:56:54,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-29 19:56:55,841 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:56:56,055 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:56:56,056 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-29 19:56:56,070 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95178a118/0c1bb9e3ff604469b4db255d70883462/FLAG904d51217 [2023-08-29 19:56:56,093 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95178a118/0c1bb9e3ff604469b4db255d70883462 [2023-08-29 19:56:56,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:56:56,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:56:56,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:56:56,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:56:56,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:56:56,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36826aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56, skipping insertion in model container [2023-08-29 19:56:56,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:56:56,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:56:56,523 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_longest-2.i[31164,31177] [2023-08-29 19:56:56,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:56:56,546 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:56:56,604 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_longest-2.i[31164,31177] [2023-08-29 19:56:56,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:56:56,654 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:56:56,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56 WrapperNode [2023-08-29 19:56:56,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:56:56,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:56:56,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:56:56,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:56:56,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,722 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 190 [2023-08-29 19:56:56,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:56:56,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:56:56,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:56:56,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:56:56,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,774 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:56:56,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:56:56,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:56:56,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:56:56,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (1/1) ... [2023-08-29 19:56:56,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:56:56,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:56:56,821 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 19:56:56,829 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 19:56:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:56:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-29 19:56:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-29 19:56:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:56:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:56:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:56:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:56:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:56:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:56:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:56:56,862 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 19:56:56,968 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:56:56,970 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:56:57,432 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:56:57,660 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:56:57,661 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-29 19:56:57,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:56:57 BoogieIcfgContainer [2023-08-29 19:56:57,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:56:57,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:56:57,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:56:57,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:56:57,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:56:56" (1/3) ... [2023-08-29 19:56:57,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e52bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:56:57, skipping insertion in model container [2023-08-29 19:56:57,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:56:56" (2/3) ... [2023-08-29 19:56:57,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e52bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:56:57, skipping insertion in model container [2023-08-29 19:56:57,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:56:57" (3/3) ... [2023-08-29 19:56:57,671 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-08-29 19:56:57,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:56:57,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2023-08-29 19:56:57,687 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:56:57,807 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-29 19:56:57,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:57,925 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-29 19:56:57,925 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:56:57,933 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 19:56:57,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:57,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:57,946 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:56:57,962 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:57,964 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:57,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 325 flow [2023-08-29 19:56:57,998 INFO L130 PetriNetUnfolder]: 11/175 cut-off events. [2023-08-29 19:56:57,998 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:56:58,002 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 19:56:58,005 INFO L119 LiptonReduction]: Number of co-enabled transitions 4248 [2023-08-29 19:57:03,190 INFO L134 LiptonReduction]: Checked pairs total: 8906 [2023-08-29 19:57:03,191 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-08-29 19:57:03,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:57:03,208 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;@174ca29e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:57:03,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2023-08-29 19:57:03,210 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2023-08-29 19:57:03,211 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:57:03,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:03,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:57:03,212 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 19:57:03,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash 30939, now seen corresponding path program 1 times [2023-08-29 19:57:03,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:03,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897729307] [2023-08-29 19:57:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:03,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:03,463 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 19:57:03,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:03,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897729307] [2023-08-29 19:57:03,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897729307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:03,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:03,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:57:03,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905703240] [2023-08-29 19:57:03,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:03,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:57:03,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:57:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:57:03,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 313 [2023-08-29 19:57:03,551 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 19:57:03,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:03,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 313 [2023-08-29 19:57:03,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:03,675 INFO L130 PetriNetUnfolder]: 128/284 cut-off events. [2023-08-29 19:57:03,675 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:57:03,676 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 19:57:03,690 INFO L137 encePairwiseOnDemand]: 292/313 looper letters, 45 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-29 19:57:03,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 193 flow [2023-08-29 19:57:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-08-29 19:57:03,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249201277955272 [2023-08-29 19:57:03,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-08-29 19:57:03,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-08-29 19:57:03,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:03,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-08-29 19:57:03,758 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 19:57:03,762 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 19:57:03,763 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 19:57:03,764 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 147 flow. Second operand 3 states and 399 transitions. [2023-08-29 19:57:03,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 193 flow [2023-08-29 19:57:03,766 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 19:57:03,768 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 103 flow [2023-08-29 19:57:03,770 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 19:57:03,777 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -19 predicate places. [2023-08-29 19:57:03,778 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 103 flow [2023-08-29 19:57:03,778 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 19:57:03,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:03,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-29 19:57:03,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:57:03,779 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 19:57:03,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:03,787 INFO L85 PathProgramCache]: Analyzing trace with hash 30941, now seen corresponding path program 1 times [2023-08-29 19:57:03,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:03,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083746728] [2023-08-29 19:57:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:03,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:57:03,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:03,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083746728] [2023-08-29 19:57:03,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083746728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:03,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:03,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:57:03,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955716204] [2023-08-29 19:57:03,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:03,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:57:03,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:03,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:57:03,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:57:03,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 313 [2023-08-29 19:57:03,929 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 19:57:03,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:03,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 313 [2023-08-29 19:57:03,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:04,063 INFO L130 PetriNetUnfolder]: 172/397 cut-off events. [2023-08-29 19:57:04,063 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:57:04,064 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 19:57:04,066 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 73 selfloop transitions, 4 changer transitions 1/80 dead transitions. [2023-08-29 19:57:04,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 323 flow [2023-08-29 19:57:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-29 19:57:04,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422790202342918 [2023-08-29 19:57:04,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-29 19:57:04,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-29 19:57:04,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:04,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-29 19:57:04,071 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 19:57:04,073 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 19:57:04,074 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 19:57:04,074 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 103 flow. Second operand 3 states and 397 transitions. [2023-08-29 19:57:04,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 323 flow [2023-08-29 19:57:04,075 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 19:57:04,076 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 130 flow [2023-08-29 19:57:04,076 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 19:57:04,077 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-08-29 19:57:04,077 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 130 flow [2023-08-29 19:57:04,078 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 19:57:04,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:04,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:57:04,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:57:04,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:04,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash 29758463, now seen corresponding path program 1 times [2023-08-29 19:57:04,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:04,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230422772] [2023-08-29 19:57:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:04,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:04,227 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 19:57:04,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:04,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230422772] [2023-08-29 19:57:04,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230422772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:04,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:04,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:57:04,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154165215] [2023-08-29 19:57:04,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:04,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:57:04,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:04,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:57:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:57:04,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 313 [2023-08-29 19:57:04,301 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 19:57:04,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:04,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 313 [2023-08-29 19:57:04,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:04,450 INFO L130 PetriNetUnfolder]: 169/410 cut-off events. [2023-08-29 19:57:04,450 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-29 19:57:04,451 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 19:57:04,453 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 70 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-08-29 19:57:04,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 334 flow [2023-08-29 19:57:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-29 19:57:04,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132055378061768 [2023-08-29 19:57:04,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-29 19:57:04,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-29 19:57:04,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:04,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-29 19:57:04,458 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 19:57:04,460 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 19:57:04,461 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 19:57:04,461 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 130 flow. Second operand 3 states and 388 transitions. [2023-08-29 19:57:04,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 334 flow [2023-08-29 19:57:04,463 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 19:57:04,464 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 139 flow [2023-08-29 19:57:04,464 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 19:57:04,464 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-08-29 19:57:04,465 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 139 flow [2023-08-29 19:57:04,465 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 19:57:04,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:04,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:57:04,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:57:04,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:04,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:04,466 INFO L85 PathProgramCache]: Analyzing trace with hash 29758586, now seen corresponding path program 1 times [2023-08-29 19:57:04,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:04,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316175103] [2023-08-29 19:57:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:04,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:04,640 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 19:57:04,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:04,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316175103] [2023-08-29 19:57:04,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316175103] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:04,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:04,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:57:04,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819770469] [2023-08-29 19:57:04,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:04,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:57:04,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:57:04,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:57:04,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 313 [2023-08-29 19:57:04,689 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 19:57:04,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:04,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 313 [2023-08-29 19:57:04,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:04,773 INFO L130 PetriNetUnfolder]: 159/397 cut-off events. [2023-08-29 19:57:04,773 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-08-29 19:57:04,773 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 19:57:04,775 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 44 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-29 19:57:04,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 223 flow [2023-08-29 19:57:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-29 19:57:04,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39403620873269435 [2023-08-29 19:57:04,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-29 19:57:04,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-29 19:57:04,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:04,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-29 19:57:04,779 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 19:57:04,781 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 19:57:04,782 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 19:57:04,782 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 139 flow. Second operand 3 states and 370 transitions. [2023-08-29 19:57:04,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 223 flow [2023-08-29 19:57:04,783 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 19:57:04,784 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 132 flow [2023-08-29 19:57:04,784 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 19:57:04,785 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -20 predicate places. [2023-08-29 19:57:04,785 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 132 flow [2023-08-29 19:57:04,785 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 19:57:04,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:04,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:57:04,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:57:04,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:04,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:04,787 INFO L85 PathProgramCache]: Analyzing trace with hash 29758464, now seen corresponding path program 1 times [2023-08-29 19:57:04,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:04,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764267988] [2023-08-29 19:57:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:04,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:04,864 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 19:57:04,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:04,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764267988] [2023-08-29 19:57:04,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764267988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:04,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:04,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:57:04,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686338123] [2023-08-29 19:57:04,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:04,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:57:04,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:04,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:57:04,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:57:04,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 313 [2023-08-29 19:57:04,914 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 19:57:04,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:04,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 313 [2023-08-29 19:57:04,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:04,998 INFO L130 PetriNetUnfolder]: 155/387 cut-off events. [2023-08-29 19:57:04,999 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2023-08-29 19:57:04,999 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 19:57:05,001 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 42 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-29 19:57:05,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 214 flow [2023-08-29 19:57:05,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-29 19:57:05,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40042598509052185 [2023-08-29 19:57:05,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-29 19:57:05,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-29 19:57:05,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:05,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-29 19:57:05,006 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 19:57:05,007 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 19:57:05,008 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 19:57:05,008 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 132 flow. Second operand 3 states and 376 transitions. [2023-08-29 19:57:05,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 214 flow [2023-08-29 19:57:05,010 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 19:57:05,011 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 129 flow [2023-08-29 19:57:05,011 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 19:57:05,013 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -21 predicate places. [2023-08-29 19:57:05,013 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 129 flow [2023-08-29 19:57:05,014 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 19:57:05,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:05,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:57:05,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:57:05,015 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:05,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:05,015 INFO L85 PathProgramCache]: Analyzing trace with hash 922513359, now seen corresponding path program 1 times [2023-08-29 19:57:05,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:05,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41887762] [2023-08-29 19:57:05,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:05,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:05,085 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 19:57:05,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:05,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41887762] [2023-08-29 19:57:05,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41887762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:05,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:05,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:57:05,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223291200] [2023-08-29 19:57:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:05,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:57:05,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:05,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:57:05,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:57:05,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:57:05,145 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 19:57:05,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:05,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:57:05,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:05,289 INFO L130 PetriNetUnfolder]: 154/362 cut-off events. [2023-08-29 19:57:05,289 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2023-08-29 19:57:05,290 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 19:57:05,291 INFO L137 encePairwiseOnDemand]: 304/313 looper letters, 60 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2023-08-29 19:57:05,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 319 flow [2023-08-29 19:57:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:57:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:57:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-29 19:57:05,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793929712460064 [2023-08-29 19:57:05,294 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-29 19:57:05,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-29 19:57:05,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:05,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-29 19:57:05,296 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 19:57:05,298 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 19:57:05,298 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 19:57:05,299 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 129 flow. Second operand 4 states and 475 transitions. [2023-08-29 19:57:05,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 319 flow [2023-08-29 19:57:05,300 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 19:57:05,301 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 168 flow [2023-08-29 19:57:05,301 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 19:57:05,301 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-08-29 19:57:05,302 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 168 flow [2023-08-29 19:57:05,302 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 19:57:05,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:05,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:05,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:57:05,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:05,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:05,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1775671262, now seen corresponding path program 1 times [2023-08-29 19:57:05,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:05,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322286376] [2023-08-29 19:57:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:05,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:05,328 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 19:57:05,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:05,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322286376] [2023-08-29 19:57:05,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322286376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:05,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:05,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:57:05,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091135441] [2023-08-29 19:57:05,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:05,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:57:05,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:57:05,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:57:05,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 313 [2023-08-29 19:57:05,337 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 19:57:05,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:05,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 313 [2023-08-29 19:57:05,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:05,418 INFO L130 PetriNetUnfolder]: 151/371 cut-off events. [2023-08-29 19:57:05,418 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2023-08-29 19:57:05,419 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 19:57:05,420 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 42 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-29 19:57:05,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 260 flow [2023-08-29 19:57:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-29 19:57:05,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014909478168264 [2023-08-29 19:57:05,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-29 19:57:05,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-29 19:57:05,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:05,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-29 19:57:05,424 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 19:57:05,426 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 19:57:05,426 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 19:57:05,426 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 168 flow. Second operand 3 states and 377 transitions. [2023-08-29 19:57:05,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 260 flow [2023-08-29 19:57:05,428 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 19:57:05,429 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 165 flow [2023-08-29 19:57:05,429 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 19:57:05,429 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -17 predicate places. [2023-08-29 19:57:05,429 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 165 flow [2023-08-29 19:57:05,430 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 19:57:05,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:05,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:05,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:57:05,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:05,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash -898009828, now seen corresponding path program 1 times [2023-08-29 19:57:05,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:05,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941220671] [2023-08-29 19:57:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:05,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:05,609 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 19:57:05,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:05,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941220671] [2023-08-29 19:57:05,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941220671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:05,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:05,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:57:05,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408648529] [2023-08-29 19:57:05,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:05,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:57:05,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:05,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:57:05,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:57:05,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 313 [2023-08-29 19:57:05,649 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 19:57:05,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:05,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 313 [2023-08-29 19:57:05,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:05,721 INFO L130 PetriNetUnfolder]: 146/357 cut-off events. [2023-08-29 19:57:05,721 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2023-08-29 19:57:05,722 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 19:57:05,723 INFO L137 encePairwiseOnDemand]: 311/313 looper letters, 40 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-29 19:57:05,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 245 flow [2023-08-29 19:57:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:05,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-29 19:57:05,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951011714589989 [2023-08-29 19:57:05,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-29 19:57:05,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-29 19:57:05,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:05,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-29 19:57:05,727 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 19:57:05,729 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 19:57:05,729 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 19:57:05,729 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 165 flow. Second operand 3 states and 371 transitions. [2023-08-29 19:57:05,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 245 flow [2023-08-29 19:57:05,730 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 19:57:05,731 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 161 flow [2023-08-29 19:57:05,731 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 19:57:05,732 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -18 predicate places. [2023-08-29 19:57:05,732 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 161 flow [2023-08-29 19:57:05,732 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 19:57:05,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:05,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:05,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:57:05,733 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:05,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:05,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2068501142, now seen corresponding path program 1 times [2023-08-29 19:57:05,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:05,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915520625] [2023-08-29 19:57:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:05,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:05,860 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 19:57:05,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:05,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915520625] [2023-08-29 19:57:05,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915520625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:05,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:05,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:57:05,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229510752] [2023-08-29 19:57:05,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:05,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:57:05,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:57:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:57:05,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 313 [2023-08-29 19:57:05,922 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 19:57:05,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:05,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 313 [2023-08-29 19:57:05,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:06,032 INFO L130 PetriNetUnfolder]: 134/316 cut-off events. [2023-08-29 19:57:06,033 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2023-08-29 19:57:06,033 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 19:57:06,035 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 51 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2023-08-29 19:57:06,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 327 flow [2023-08-29 19:57:06,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:57:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:57:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 485 transitions. [2023-08-29 19:57:06,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38738019169329074 [2023-08-29 19:57:06,037 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 485 transitions. [2023-08-29 19:57:06,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 485 transitions. [2023-08-29 19:57:06,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:06,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 485 transitions. [2023-08-29 19:57:06,039 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 19:57:06,041 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 19:57:06,041 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 19:57:06,041 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 161 flow. Second operand 4 states and 485 transitions. [2023-08-29 19:57:06,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 327 flow [2023-08-29 19:57:06,043 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 19:57:06,044 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 196 flow [2023-08-29 19:57:06,044 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 19:57:06,044 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-08-29 19:57:06,044 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 196 flow [2023-08-29 19:57:06,045 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 19:57:06,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:06,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:06,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:57:06,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:06,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 740294123, now seen corresponding path program 1 times [2023-08-29 19:57:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:06,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724529284] [2023-08-29 19:57:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:06,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:06,099 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 19:57:06,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:06,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724529284] [2023-08-29 19:57:06,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724529284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:06,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:06,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:57:06,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290667317] [2023-08-29 19:57:06,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:06,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:57:06,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:06,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:57:06,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:57:06,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 313 [2023-08-29 19:57:06,107 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 19:57:06,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:06,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 313 [2023-08-29 19:57:06,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:06,191 INFO L130 PetriNetUnfolder]: 131/313 cut-off events. [2023-08-29 19:57:06,191 INFO L131 PetriNetUnfolder]: For 183/183 co-relation queries the response was YES. [2023-08-29 19:57:06,192 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 19:57:06,193 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 43 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2023-08-29 19:57:06,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 300 flow [2023-08-29 19:57:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2023-08-29 19:57:06,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40042598509052185 [2023-08-29 19:57:06,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 376 transitions. [2023-08-29 19:57:06,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 376 transitions. [2023-08-29 19:57:06,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:06,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 376 transitions. [2023-08-29 19:57:06,197 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 19:57:06,199 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 19:57:06,199 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 19:57:06,199 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 196 flow. Second operand 3 states and 376 transitions. [2023-08-29 19:57:06,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 300 flow [2023-08-29 19:57:06,201 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 19:57:06,202 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 196 flow [2023-08-29 19:57:06,202 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 19:57:06,202 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -15 predicate places. [2023-08-29 19:57:06,203 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 196 flow [2023-08-29 19:57:06,203 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 19:57:06,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:06,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:06,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:57:06,204 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:06,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash 740445031, now seen corresponding path program 1 times [2023-08-29 19:57:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:06,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686619210] [2023-08-29 19:57:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:06,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:06,287 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 19:57:06,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:06,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686619210] [2023-08-29 19:57:06,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686619210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:06,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:06,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:57:06,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456528039] [2023-08-29 19:57:06,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:06,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:57:06,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:06,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:57:06,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:57:06,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 313 [2023-08-29 19:57:06,319 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 19:57:06,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:06,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 313 [2023-08-29 19:57:06,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:06,445 INFO L130 PetriNetUnfolder]: 137/336 cut-off events. [2023-08-29 19:57:06,445 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-29 19:57:06,445 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 19:57:06,447 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 61 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-29 19:57:06,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 387 flow [2023-08-29 19:57:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:57:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:57:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 676 transitions. [2023-08-29 19:57:06,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3599574014909478 [2023-08-29 19:57:06,450 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 676 transitions. [2023-08-29 19:57:06,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 676 transitions. [2023-08-29 19:57:06,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:06,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 676 transitions. [2023-08-29 19:57:06,452 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 19:57:06,455 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 19:57:06,455 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 19:57:06,455 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 196 flow. Second operand 6 states and 676 transitions. [2023-08-29 19:57:06,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 387 flow [2023-08-29 19:57:06,457 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 19:57:06,458 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 207 flow [2023-08-29 19:57:06,458 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 19:57:06,458 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -9 predicate places. [2023-08-29 19:57:06,458 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 207 flow [2023-08-29 19:57:06,459 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 19:57:06,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:06,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:06,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:57:06,459 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:06,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1396868391, now seen corresponding path program 1 times [2023-08-29 19:57:06,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:06,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113647762] [2023-08-29 19:57:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:06,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:06,530 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 19:57:06,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:06,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113647762] [2023-08-29 19:57:06,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113647762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:06,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:06,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:57:06,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99522165] [2023-08-29 19:57:06,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:06,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:57:06,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:57:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:57:06,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 313 [2023-08-29 19:57:06,567 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 19:57:06,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:06,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 313 [2023-08-29 19:57:06,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:06,639 INFO L130 PetriNetUnfolder]: 127/305 cut-off events. [2023-08-29 19:57:06,640 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2023-08-29 19:57:06,640 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 19:57:06,642 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 37 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2023-08-29 19:57:06,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 45 transitions, 303 flow [2023-08-29 19:57:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-08-29 19:57:06,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706070287539936 [2023-08-29 19:57:06,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-08-29 19:57:06,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-08-29 19:57:06,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:06,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-08-29 19:57:06,646 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 19:57:06,647 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 19:57:06,647 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 19:57:06,648 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 207 flow. Second operand 3 states and 348 transitions. [2023-08-29 19:57:06,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 45 transitions, 303 flow [2023-08-29 19:57:06,649 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 19:57:06,650 INFO L231 Difference]: Finished difference. Result has 54 places, 41 transitions, 201 flow [2023-08-29 19:57:06,650 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 19:57:06,650 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2023-08-29 19:57:06,651 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 41 transitions, 201 flow [2023-08-29 19:57:06,651 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 19:57:06,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:06,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:06,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:57:06,652 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:06,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:06,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1396868390, now seen corresponding path program 1 times [2023-08-29 19:57:06,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:06,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160807527] [2023-08-29 19:57:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:06,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:06,731 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 19:57:06,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160807527] [2023-08-29 19:57:06,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160807527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:06,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:06,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:57:06,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900356325] [2023-08-29 19:57:06,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:06,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:57:06,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:06,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:57:06,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:57:06,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 313 [2023-08-29 19:57:06,755 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 19:57:06,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:06,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 313 [2023-08-29 19:57:06,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:06,837 INFO L130 PetriNetUnfolder]: 123/302 cut-off events. [2023-08-29 19:57:06,838 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-08-29 19:57:06,838 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 19:57:06,839 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 38 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2023-08-29 19:57:06,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 311 flow [2023-08-29 19:57:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-29 19:57:06,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865814696485623 [2023-08-29 19:57:06,841 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-29 19:57:06,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-29 19:57:06,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:06,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-29 19:57:06,843 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 19:57:06,844 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 19:57:06,845 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 19:57:06,845 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 201 flow. Second operand 3 states and 363 transitions. [2023-08-29 19:57:06,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 311 flow [2023-08-29 19:57:06,846 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 19:57:06,847 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 233 flow [2023-08-29 19:57:06,847 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 19:57:06,848 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -12 predicate places. [2023-08-29 19:57:06,848 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 233 flow [2023-08-29 19:57:06,848 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 19:57:06,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:06,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:06,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:57:06,849 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:06,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:06,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1396868386, now seen corresponding path program 1 times [2023-08-29 19:57:06,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:06,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047617706] [2023-08-29 19:57:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:06,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:06,954 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 19:57:06,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:06,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047617706] [2023-08-29 19:57:06,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047617706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:06,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:06,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:57:06,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213209272] [2023-08-29 19:57:06,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:06,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:57:06,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:57:06,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:57:06,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 313 [2023-08-29 19:57:06,988 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 19:57:06,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:06,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 313 [2023-08-29 19:57:06,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:07,058 INFO L130 PetriNetUnfolder]: 116/284 cut-off events. [2023-08-29 19:57:07,058 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2023-08-29 19:57:07,059 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 19:57:07,060 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 38 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2023-08-29 19:57:07,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 46 transitions, 328 flow [2023-08-29 19:57:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:57:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:57:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-29 19:57:07,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38338658146964855 [2023-08-29 19:57:07,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-29 19:57:07,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-29 19:57:07,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:07,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-29 19:57:07,064 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 19:57:07,065 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 19:57:07,066 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 19:57:07,066 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 233 flow. Second operand 3 states and 360 transitions. [2023-08-29 19:57:07,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 46 transitions, 328 flow [2023-08-29 19:57:07,067 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 19:57:07,068 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 227 flow [2023-08-29 19:57:07,068 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 19:57:07,069 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -13 predicate places. [2023-08-29 19:57:07,069 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 227 flow [2023-08-29 19:57:07,069 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 19:57:07,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:07,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:07,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:57:07,070 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:07,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash -167064850, now seen corresponding path program 1 times [2023-08-29 19:57:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:07,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538387613] [2023-08-29 19:57:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:07,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:07,203 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 19:57:07,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:07,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538387613] [2023-08-29 19:57:07,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538387613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:07,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:07,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:57:07,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151355633] [2023-08-29 19:57:07,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:07,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:57:07,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:57:07,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:57:07,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 313 [2023-08-29 19:57:07,310 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 19:57:07,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:07,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 313 [2023-08-29 19:57:07,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:07,373 INFO L130 PetriNetUnfolder]: 107/258 cut-off events. [2023-08-29 19:57:07,374 INFO L131 PetriNetUnfolder]: For 268/268 co-relation queries the response was YES. [2023-08-29 19:57:07,374 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 19:57:07,375 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 35 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2023-08-29 19:57:07,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 323 flow [2023-08-29 19:57:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:57:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:57:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 419 transitions. [2023-08-29 19:57:07,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33466453674121405 [2023-08-29 19:57:07,378 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 419 transitions. [2023-08-29 19:57:07,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 419 transitions. [2023-08-29 19:57:07,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:07,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 419 transitions. [2023-08-29 19:57:07,379 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 19:57:07,381 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 19:57:07,381 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 19:57:07,381 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 227 flow. Second operand 4 states and 419 transitions. [2023-08-29 19:57:07,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 323 flow [2023-08-29 19:57:07,383 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 19:57:07,384 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 214 flow [2023-08-29 19:57:07,384 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 19:57:07,384 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -16 predicate places. [2023-08-29 19:57:07,384 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 214 flow [2023-08-29 19:57:07,385 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 19:57:07,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:07,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:57:07,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:57:07,385 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:07,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash -167064848, now seen corresponding path program 1 times [2023-08-29 19:57:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:07,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117276932] [2023-08-29 19:57:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:07,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:07,736 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 19:57:07,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:07,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117276932] [2023-08-29 19:57:07,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117276932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:07,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:07,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:57:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967136470] [2023-08-29 19:57:07,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:07,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 19:57:07,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 19:57:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:57:08,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 313 [2023-08-29 19:57:08,041 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 19:57:08,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:08,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 313 [2023-08-29 19:57:08,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:08,273 INFO L130 PetriNetUnfolder]: 109/266 cut-off events. [2023-08-29 19:57:08,274 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2023-08-29 19:57:08,274 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 19:57:08,276 INFO L137 encePairwiseOnDemand]: 303/313 looper letters, 57 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2023-08-29 19:57:08,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 490 flow [2023-08-29 19:57:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:57:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:57:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 957 transitions. [2023-08-29 19:57:08,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30575079872204475 [2023-08-29 19:57:08,280 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 957 transitions. [2023-08-29 19:57:08,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 957 transitions. [2023-08-29 19:57:08,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:08,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 957 transitions. [2023-08-29 19:57:08,283 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 19:57:08,286 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 19:57:08,287 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 19:57:08,287 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 214 flow. Second operand 10 states and 957 transitions. [2023-08-29 19:57:08,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 490 flow [2023-08-29 19:57:08,289 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 19:57:08,290 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 301 flow [2023-08-29 19:57:08,290 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 19:57:08,290 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -8 predicate places. [2023-08-29 19:57:08,290 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 301 flow [2023-08-29 19:57:08,291 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 19:57:08,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:08,291 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 19:57:08,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:57:08,291 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 19:57:08,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash -252358597, now seen corresponding path program 1 times [2023-08-29 19:57:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583930046] [2023-08-29 19:57:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:08,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:08,390 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 19:57:08,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:08,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583930046] [2023-08-29 19:57:08,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583930046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:57:08,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:57:08,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:57:08,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754232546] [2023-08-29 19:57:08,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:57:08,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:57:08,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:08,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:57:08,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:57:08,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 313 [2023-08-29 19:57:08,462 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 19:57:08,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:08,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 313 [2023-08-29 19:57:08,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:08,524 INFO L130 PetriNetUnfolder]: 86/227 cut-off events. [2023-08-29 19:57:08,525 INFO L131 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2023-08-29 19:57:08,525 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 19:57:08,526 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 40 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2023-08-29 19:57:08,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 415 flow [2023-08-29 19:57:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:57:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:57:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 429 transitions. [2023-08-29 19:57:08,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3426517571884984 [2023-08-29 19:57:08,529 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 429 transitions. [2023-08-29 19:57:08,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 429 transitions. [2023-08-29 19:57:08,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:57:08,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 429 transitions. [2023-08-29 19:57:08,530 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 19:57:08,532 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 19:57:08,532 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 19:57:08,532 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 301 flow. Second operand 4 states and 429 transitions. [2023-08-29 19:57:08,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 415 flow [2023-08-29 19:57:08,534 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 19:57:08,535 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 295 flow [2023-08-29 19:57:08,535 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 19:57:08,536 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -10 predicate places. [2023-08-29 19:57:08,536 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 295 flow [2023-08-29 19:57:08,536 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 19:57:08,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:57:08,536 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 19:57:08,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:57:08,537 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:57:08,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:57:08,537 INFO L85 PathProgramCache]: Analyzing trace with hash 766796576, now seen corresponding path program 1 times [2023-08-29 19:57:08,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:57:08,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384999526] [2023-08-29 19:57:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:08,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:57:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:09,031 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 19:57:09,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:57:09,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384999526] [2023-08-29 19:57:09,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384999526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:57:09,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403646680] [2023-08-29 19:57:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:57:09,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:57:09,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:57:09,039 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 19:57:09,045 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 19:57:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:57:09,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-29 19:57:09,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:57:09,293 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:57:09,294 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 19:57:09,384 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:57:09,385 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 19:57:09,797 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 19:57:09,797 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 19:57:09,820 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2023-08-29 19:57:09,820 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 19:57:09,840 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:57:09,841 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 19:57:09,856 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:57:09,857 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 19:57:10,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:57:10,011 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 19:57:10,014 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 19:57:10,038 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 19:57:10,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:57:10,058 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_293 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_293) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) is different from false [2023-08-29 19:57:10,317 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:57:10,318 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 19:57:10,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:57:10,334 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 19:57:10,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:57:10,564 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 19:57:10,567 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 19:57:10,571 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 19:57:10,574 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 19:57:10,589 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:57:10,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2023-08-29 19:57:10,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:57:10,738 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 19:57:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-29 19:57:10,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403646680] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:57:10,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:57:10,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-29 19:57:10,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671226215] [2023-08-29 19:57:10,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:57:10,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 19:57:10,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:57:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 19:57:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=479, Unknown=1, NotChecked=44, Total=600 [2023-08-29 19:57:10,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 313 [2023-08-29 19:57:10,930 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 19:57:10,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:57:10,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 313 [2023-08-29 19:57:10,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:57:19,642 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 19:57:27,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:57:29,799 WARN L539 Checker$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 19:57:35,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:57:47,961 WARN L539 Checker$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 19:57:52,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:57:54,246 WARN L539 Checker$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 19:58:10,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:58:12,498 WARN L539 Checker$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 19:58:22,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:58:24,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:58:26,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:58:28,833 WARN L539 Checker$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 19:58:30,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-29 19:58:32,861 WARN L539 Checker$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 19:58:34,882 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 19:58:36,215 INFO L130 PetriNetUnfolder]: 230/622 cut-off events. [2023-08-29 19:58:36,215 INFO L131 PetriNetUnfolder]: For 925/925 co-relation queries the response was YES. [2023-08-29 19:58:36,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143 conditions, 622 events. 230/622 cut-off events. For 925/925 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2818 event pairs, 8 based on Foata normal form. 21/583 useless extension candidates. Maximal degree in co-relation 2117. Up to 128 conditions per place. [2023-08-29 19:58:36,219 INFO L137 encePairwiseOnDemand]: 295/313 looper letters, 122 selfloop transitions, 90 changer transitions 0/213 dead transitions. [2023-08-29 19:58:36,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 213 transitions, 1549 flow [2023-08-29 19:58:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-29 19:58:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-29 19:58:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2043 transitions. [2023-08-29 19:58:36,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.17640963647353425 [2023-08-29 19:58:36,227 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2043 transitions. [2023-08-29 19:58:36,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2043 transitions. [2023-08-29 19:58:36,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:36,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2043 transitions. [2023-08-29 19:58:36,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.21621621621622) internal successors, (2043), 37 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states 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 19:58:36,246 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 19:58:36,248 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 19:58:36,248 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 295 flow. Second operand 37 states and 2043 transitions. [2023-08-29 19:58:36,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 213 transitions, 1549 flow [2023-08-29 19:58:36,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 213 transitions, 1485 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:58:36,254 INFO L231 Difference]: Finished difference. Result has 104 places, 126 transitions, 1074 flow [2023-08-29 19:58:36,255 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=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1074, PETRI_PLACES=104, PETRI_TRANSITIONS=126} [2023-08-29 19:58:36,255 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 37 predicate places. [2023-08-29 19:58:36,255 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 126 transitions, 1074 flow [2023-08-29 19:58:36,256 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 19:58:36,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:36,256 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 19:58:36,268 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 19:58:36,468 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 19:58:36,469 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:36,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:36,469 INFO L85 PathProgramCache]: Analyzing trace with hash 839167845, now seen corresponding path program 1 times [2023-08-29 19:58:36,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:36,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970144813] [2023-08-29 19:58:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:36,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:36,735 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 19:58:36,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:36,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970144813] [2023-08-29 19:58:36,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970144813] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:36,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801774967] [2023-08-29 19:58:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:36,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:36,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:36,738 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 19:58:36,740 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 19:58:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-29 19:58:36,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:36,891 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-29 19:58:36,891 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 19:58:36,942 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:58:36,943 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 19:58:37,056 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 19:58:37,095 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 19:58:37,096 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 19:58:37,117 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 19:58:37,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:37,194 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 19:58:37,247 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 19:58:37,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801774967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:37,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:37,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-29 19:58:37,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734448715] [2023-08-29 19:58:37,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:37,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:58:37,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:37,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:58:37,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:58:37,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 313 [2023-08-29 19:58:37,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 126 transitions, 1074 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 19:58:37,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:37,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 313 [2023-08-29 19:58:37,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:38,064 INFO L130 PetriNetUnfolder]: 220/594 cut-off events. [2023-08-29 19:58:38,064 INFO L131 PetriNetUnfolder]: For 3259/3259 co-relation queries the response was YES. [2023-08-29 19:58:38,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3033 conditions, 594 events. 220/594 cut-off events. For 3259/3259 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2642 event pairs, 30 based on Foata normal form. 20/582 useless extension candidates. Maximal degree in co-relation 2993. Up to 353 conditions per place. [2023-08-29 19:58:38,070 INFO L137 encePairwiseOnDemand]: 306/313 looper letters, 107 selfloop transitions, 35 changer transitions 0/143 dead transitions. [2023-08-29 19:58:38,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 1532 flow [2023-08-29 19:58:38,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:58:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:58:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 824 transitions. [2023-08-29 19:58:38,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29250976215832447 [2023-08-29 19:58:38,078 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 824 transitions. [2023-08-29 19:58:38,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 824 transitions. [2023-08-29 19:58:38,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:38,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 824 transitions. [2023-08-29 19:58:38,081 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 19:58:38,084 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 19:58:38,084 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 19:58:38,084 INFO L175 Difference]: Start difference. First operand has 104 places, 126 transitions, 1074 flow. Second operand 9 states and 824 transitions. [2023-08-29 19:58:38,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 1532 flow [2023-08-29 19:58:38,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 143 transitions, 1418 flow, removed 39 selfloop flow, removed 7 redundant places. [2023-08-29 19:58:38,100 INFO L231 Difference]: Finished difference. Result has 104 places, 126 transitions, 1036 flow [2023-08-29 19:58:38,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1036, PETRI_PLACES=104, PETRI_TRANSITIONS=126} [2023-08-29 19:58:38,101 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 37 predicate places. [2023-08-29 19:58:38,101 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 126 transitions, 1036 flow [2023-08-29 19:58:38,107 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 19:58:38,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:38,108 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 19:58:38,114 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 19:58:38,313 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 19:58:38,313 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:38,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:38,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1013368158, now seen corresponding path program 1 times [2023-08-29 19:58:38,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:38,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276148753] [2023-08-29 19:58:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:38,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:38,476 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 19:58:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276148753] [2023-08-29 19:58:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276148753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127100719] [2023-08-29 19:58:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:38,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:38,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:38,481 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 19:58:38,505 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 19:58:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:38,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-29 19:58:38,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:38,682 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 19:58:38,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:38,758 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 19:58:38,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127100719] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:38,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:38,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-29 19:58:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775143970] [2023-08-29 19:58:38,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:38,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:58:38,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:38,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:58:38,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:58:38,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:58:38,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 126 transitions, 1036 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 19:58:38,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:38,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:58:38,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:39,480 INFO L130 PetriNetUnfolder]: 328/863 cut-off events. [2023-08-29 19:58:39,481 INFO L131 PetriNetUnfolder]: For 5825/5825 co-relation queries the response was YES. [2023-08-29 19:58:39,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4577 conditions, 863 events. 328/863 cut-off events. For 5825/5825 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3800 event pairs, 34 based on Foata normal form. 44/875 useless extension candidates. Maximal degree in co-relation 4540. Up to 221 conditions per place. [2023-08-29 19:58:39,489 INFO L137 encePairwiseOnDemand]: 303/313 looper letters, 201 selfloop transitions, 49 changer transitions 3/254 dead transitions. [2023-08-29 19:58:39,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 254 transitions, 2764 flow [2023-08-29 19:58:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-29 19:58:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-29 19:58:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2389 transitions. [2023-08-29 19:58:39,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469358117920418 [2023-08-29 19:58:39,495 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2389 transitions. [2023-08-29 19:58:39,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2389 transitions. [2023-08-29 19:58:39,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:39,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2389 transitions. [2023-08-29 19:58:39,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 108.5909090909091) internal successors, (2389), 22 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states 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 19:58:39,510 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 19:58:39,511 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 19:58:39,511 INFO L175 Difference]: Start difference. First operand has 104 places, 126 transitions, 1036 flow. Second operand 22 states and 2389 transitions. [2023-08-29 19:58:39,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 254 transitions, 2764 flow [2023-08-29 19:58:39,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 254 transitions, 2555 flow, removed 73 selfloop flow, removed 10 redundant places. [2023-08-29 19:58:39,529 INFO L231 Difference]: Finished difference. Result has 112 places, 128 transitions, 1140 flow [2023-08-29 19:58:39,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1140, PETRI_PLACES=112, PETRI_TRANSITIONS=128} [2023-08-29 19:58:39,530 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 45 predicate places. [2023-08-29 19:58:39,530 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 128 transitions, 1140 flow [2023-08-29 19:58:39,530 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 19:58:39,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:39,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:39,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-29 19:58:39,736 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 19:58:39,736 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thr1Err38ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:39,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1651294939, now seen corresponding path program 1 times [2023-08-29 19:58:39,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:39,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693152965] [2023-08-29 19:58:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:39,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-29 19:58:40,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:40,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693152965] [2023-08-29 19:58:40,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693152965] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:40,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793981990] [2023-08-29 19:58:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:40,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:40,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:40,321 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 19:58:40,324 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 19:58:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:40,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-29 19:58:40,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:40,488 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:58:40,488 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 19:58:40,660 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 19:58:40,663 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 19:58:40,697 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-29 19:58:40,697 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 19:58:41,131 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-29 19:58:41,131 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 19:58:41,177 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:58:41,177 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 178 treesize of output 170 [2023-08-29 19:58:41,202 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:58:41,203 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 170 treesize of output 162 [2023-08-29 19:58:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-29 19:58:41,261 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 17 treesize of output 14 [2023-08-29 19:58:41,264 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 19:58:41,314 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 19:58:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:41,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:41,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:58:41,615 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 19:58:41,632 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-29 19:58:41,633 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 19:58:41,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:58:41,806 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 19:58:41,809 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 131 treesize of output 119 [2023-08-29 19:58:41,816 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 19:58:41,820 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 19:58:41,831 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 19:58:42,048 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 40 treesize of output 36 [2023-08-29 19:58:42,054 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 36 treesize of output 34 [2023-08-29 19:58:42,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-29 19:58:42,070 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 64 treesize of output 80 [2023-08-29 19:58:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:42,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793981990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:42,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:42,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2023-08-29 19:58:42,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861688945] [2023-08-29 19:58:42,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:42,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-29 19:58:42,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:42,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-29 19:58:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2023-08-29 19:58:44,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 313 [2023-08-29 19:58:44,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 128 transitions, 1140 flow. Second operand has 29 states, 29 states have (on average 56.793103448275865) internal successors, (1647), 29 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states 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 19:58:44,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:44,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 313 [2023-08-29 19:58:44,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:52,142 INFO L130 PetriNetUnfolder]: 834/2315 cut-off events. [2023-08-29 19:58:52,142 INFO L131 PetriNetUnfolder]: For 13815/13815 co-relation queries the response was YES. [2023-08-29 19:58:52,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11839 conditions, 2315 events. 834/2315 cut-off events. For 13815/13815 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 14407 event pairs, 48 based on Foata normal form. 62/2377 useless extension candidates. Maximal degree in co-relation 11799. Up to 723 conditions per place. [2023-08-29 19:58:52,161 INFO L137 encePairwiseOnDemand]: 293/313 looper letters, 247 selfloop transitions, 343 changer transitions 1/592 dead transitions. [2023-08-29 19:58:52,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 592 transitions, 6387 flow [2023-08-29 19:58:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-08-29 19:58:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-08-29 19:58:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5743 transitions. [2023-08-29 19:58:52,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.187226967464302 [2023-08-29 19:58:52,176 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5743 transitions. [2023-08-29 19:58:52,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5743 transitions. [2023-08-29 19:58:52,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:52,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5743 transitions. [2023-08-29 19:58:52,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 58.60204081632653) internal successors, (5743), 98 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states 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 19:58:52,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 313.0) internal successors, (30987), 99 states have internal predecessors, (30987), 0 states have call successors, (0), 0 states 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 19:58:52,225 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 313.0) internal successors, (30987), 99 states have internal predecessors, (30987), 0 states have call successors, (0), 0 states 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 19:58:52,226 INFO L175 Difference]: Start difference. First operand has 112 places, 128 transitions, 1140 flow. Second operand 98 states and 5743 transitions. [2023-08-29 19:58:52,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 592 transitions, 6387 flow [2023-08-29 19:58:52,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 592 transitions, 6212 flow, removed 71 selfloop flow, removed 7 redundant places. [2023-08-29 19:58:52,264 INFO L231 Difference]: Finished difference. Result has 226 places, 394 transitions, 4414 flow [2023-08-29 19:58:52,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=4414, PETRI_PLACES=226, PETRI_TRANSITIONS=394} [2023-08-29 19:58:52,265 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 159 predicate places. [2023-08-29 19:58:52,265 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 394 transitions, 4414 flow [2023-08-29 19:58:52,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.793103448275865) internal successors, (1647), 29 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states 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 19:58:52,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:52,266 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 19:58:52,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-29 19:58:52,473 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 19:58:52,473 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:52,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1850938641, now seen corresponding path program 1 times [2023-08-29 19:58:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:52,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17429878] [2023-08-29 19:58:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:52,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:52,694 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 19:58:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17429878] [2023-08-29 19:58:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17429878] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969713346] [2023-08-29 19:58:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:52,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:52,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:52,697 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 19:58:52,699 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 19:58:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 19:58:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:52,987 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 19:58:52,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:53,097 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 19:58:53,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969713346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:53,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:53,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-29 19:58:53,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818894721] [2023-08-29 19:58:53,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:53,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 19:58:53,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:53,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 19:58:53,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-08-29 19:58:53,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:58:53,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 394 transitions, 4414 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 19:58:53,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:53,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:58:53,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:54,762 INFO L130 PetriNetUnfolder]: 1285/3476 cut-off events. [2023-08-29 19:58:54,763 INFO L131 PetriNetUnfolder]: For 86306/86306 co-relation queries the response was YES. [2023-08-29 19:58:54,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28385 conditions, 3476 events. 1285/3476 cut-off events. For 86306/86306 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 23597 event pairs, 53 based on Foata normal form. 115/3591 useless extension candidates. Maximal degree in co-relation 28321. Up to 1240 conditions per place. [2023-08-29 19:58:54,801 INFO L137 encePairwiseOnDemand]: 304/313 looper letters, 765 selfloop transitions, 117 changer transitions 2/885 dead transitions. [2023-08-29 19:58:54,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 885 transitions, 12751 flow [2023-08-29 19:58:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-29 19:58:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-29 19:58:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2309 transitions. [2023-08-29 19:58:54,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35128556214818196 [2023-08-29 19:58:54,805 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2309 transitions. [2023-08-29 19:58:54,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2309 transitions. [2023-08-29 19:58:54,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:54,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2309 transitions. [2023-08-29 19:58:54,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 109.95238095238095) internal successors, (2309), 21 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states 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 19:58:54,814 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 19:58:54,815 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 19:58:54,815 INFO L175 Difference]: Start difference. First operand has 226 places, 394 transitions, 4414 flow. Second operand 21 states and 2309 transitions. [2023-08-29 19:58:54,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 885 transitions, 12751 flow [2023-08-29 19:58:55,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 885 transitions, 10026 flow, removed 1109 selfloop flow, removed 23 redundant places. [2023-08-29 19:58:55,033 INFO L231 Difference]: Finished difference. Result has 219 places, 401 transitions, 3882 flow [2023-08-29 19:58:55,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=2901, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3882, PETRI_PLACES=219, PETRI_TRANSITIONS=401} [2023-08-29 19:58:55,034 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 152 predicate places. [2023-08-29 19:58:55,034 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 401 transitions, 3882 flow [2023-08-29 19:58:55,035 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 19:58:55,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:55,035 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:58:55,044 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 19:58:55,244 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,SelfDestructingSolverStorable21 [2023-08-29 19:58:55,244 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:55,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:55,244 INFO L85 PathProgramCache]: Analyzing trace with hash -286310723, now seen corresponding path program 1 times [2023-08-29 19:58:55,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:55,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993359729] [2023-08-29 19:58:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:55,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:55,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:55,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993359729] [2023-08-29 19:58:55,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993359729] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:55,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574978999] [2023-08-29 19:58:55,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:55,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:55,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:55,500 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 19:58:55,502 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 19:58:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:55,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-29 19:58:55,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 62 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:55,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 62 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:58:55,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574978999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:55,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:55,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-29 19:58:55,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109315285] [2023-08-29 19:58:55,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:55,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:58:55,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:55,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:58:55,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:58:55,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 313 [2023-08-29 19:58:55,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 401 transitions, 3882 flow. Second operand has 14 states, 14 states have (on average 108.85714285714286) internal successors, (1524), 14 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states 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 19:58:55,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:55,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 313 [2023-08-29 19:58:55,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:56,911 INFO L130 PetriNetUnfolder]: 1045/2932 cut-off events. [2023-08-29 19:58:56,911 INFO L131 PetriNetUnfolder]: For 60942/60942 co-relation queries the response was YES. [2023-08-29 19:58:56,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21060 conditions, 2932 events. 1045/2932 cut-off events. For 60942/60942 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 17397 event pairs, 77 based on Foata normal form. 56/2953 useless extension candidates. Maximal degree in co-relation 20997. Up to 1143 conditions per place. [2023-08-29 19:58:56,936 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 294 selfloop transitions, 100 changer transitions 2/397 dead transitions. [2023-08-29 19:58:56,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 397 transitions, 4810 flow [2023-08-29 19:58:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:58:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:58:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1624 transitions. [2023-08-29 19:58:56,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34589989350372735 [2023-08-29 19:58:56,939 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1624 transitions. [2023-08-29 19:58:56,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1624 transitions. [2023-08-29 19:58:56,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:56,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1624 transitions. [2023-08-29 19:58:56,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 108.26666666666667) internal successors, (1624), 15 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states 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 19:58:56,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 313.0) internal successors, (5008), 16 states have internal predecessors, (5008), 0 states have call successors, (0), 0 states 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 19:58:56,945 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 313.0) internal successors, (5008), 16 states have internal predecessors, (5008), 0 states have call successors, (0), 0 states 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 19:58:56,945 INFO L175 Difference]: Start difference. First operand has 219 places, 401 transitions, 3882 flow. Second operand 15 states and 1624 transitions. [2023-08-29 19:58:56,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 397 transitions, 4810 flow [2023-08-29 19:58:57,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 397 transitions, 4744 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-29 19:58:57,141 INFO L231 Difference]: Finished difference. Result has 217 places, 345 transitions, 3306 flow [2023-08-29 19:58:57,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3306, PETRI_PLACES=217, PETRI_TRANSITIONS=345} [2023-08-29 19:58:57,142 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 150 predicate places. [2023-08-29 19:58:57,142 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 345 transitions, 3306 flow [2023-08-29 19:58:57,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.85714285714286) internal successors, (1524), 14 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states 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 19:58:57,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:57,143 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 19:58:57,149 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 19:58:57,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:57,350 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thr1Err22ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:57,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:57,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1851689517, now seen corresponding path program 2 times [2023-08-29 19:58:57,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:57,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321823605] [2023-08-29 19:58:57,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:57,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:58:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:58:57,683 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 19:58:57,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:58:57,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321823605] [2023-08-29 19:58:57,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321823605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:58:57,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842025491] [2023-08-29 19:58:57,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:58:57,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:57,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:58:57,685 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 19:58:57,688 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 19:58:57,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:58:57,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:58:57,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-29 19:58:57,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:58:58,041 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 19:58:58,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:58:58,247 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 19:58:58,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842025491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:58:58,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:58:58,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-29 19:58:58,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789900084] [2023-08-29 19:58:58,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:58:58,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 19:58:58,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:58:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 19:58:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-08-29 19:58:58,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:58:58,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 345 transitions, 3306 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 19:58:58,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:58:58,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:58:58,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:58:59,648 INFO L130 PetriNetUnfolder]: 663/1893 cut-off events. [2023-08-29 19:58:59,648 INFO L131 PetriNetUnfolder]: For 37230/37230 co-relation queries the response was YES. [2023-08-29 19:58:59,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13680 conditions, 1893 events. 663/1893 cut-off events. For 37230/37230 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 9982 event pairs, 40 based on Foata normal form. 44/1916 useless extension candidates. Maximal degree in co-relation 13616. Up to 628 conditions per place. [2023-08-29 19:58:59,667 INFO L137 encePairwiseOnDemand]: 306/313 looper letters, 319 selfloop transitions, 101 changer transitions 9/430 dead transitions. [2023-08-29 19:58:59,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 430 transitions, 5606 flow [2023-08-29 19:58:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-29 19:58:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-29 19:58:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2562 transitions. [2023-08-29 19:58:59,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34105431309904155 [2023-08-29 19:58:59,672 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2562 transitions. [2023-08-29 19:58:59,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2562 transitions. [2023-08-29 19:58:59,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:58:59,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2562 transitions. [2023-08-29 19:58:59,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 106.75) internal successors, (2562), 24 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states 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 19:58:59,682 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 19:58:59,683 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 19:58:59,683 INFO L175 Difference]: Start difference. First operand has 217 places, 345 transitions, 3306 flow. Second operand 24 states and 2562 transitions. [2023-08-29 19:58:59,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 430 transitions, 5606 flow [2023-08-29 19:58:59,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 430 transitions, 5489 flow, removed 9 selfloop flow, removed 14 redundant places. [2023-08-29 19:58:59,775 INFO L231 Difference]: Finished difference. Result has 224 places, 311 transitions, 3067 flow [2023-08-29 19:58:59,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3067, PETRI_PLACES=224, PETRI_TRANSITIONS=311} [2023-08-29 19:58:59,776 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 157 predicate places. [2023-08-29 19:58:59,776 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 311 transitions, 3067 flow [2023-08-29 19:58:59,777 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 19:58:59,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:58:59,777 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 19:58:59,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-29 19:58:59,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:58:59,987 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:58:59,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:58:59,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1835615229, now seen corresponding path program 2 times [2023-08-29 19:58:59,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:58:59,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478742199] [2023-08-29 19:58:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:58:59,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:00,454 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 19:59:00,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:00,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478742199] [2023-08-29 19:59:00,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478742199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:59:00,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349386220] [2023-08-29 19:59:00,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-29 19:59:00,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:59:00,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:59:00,456 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 19:59:00,459 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 19:59:00,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-29 19:59:00,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:59:00,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-29 19:59:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:59:00,945 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 19:59:00,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:59:01,205 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 19:59:01,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349386220] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:59:01,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:59:01,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-29 19:59:01,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671477843] [2023-08-29 19:59:01,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:59:01,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:59:01,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:59:01,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:59:01,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:59:01,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 311 transitions, 3067 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 19:59:01,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:01,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:59:01,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:59:06,065 INFO L130 PetriNetUnfolder]: 2173/6105 cut-off events. [2023-08-29 19:59:06,066 INFO L131 PetriNetUnfolder]: For 126682/126682 co-relation queries the response was YES. [2023-08-29 19:59:06,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45269 conditions, 6105 events. 2173/6105 cut-off events. For 126682/126682 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 37392 event pairs, 163 based on Foata normal form. 124/6158 useless extension candidates. Maximal degree in co-relation 45206. Up to 2074 conditions per place. [2023-08-29 19:59:06,118 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 1496 selfloop transitions, 144 changer transitions 11/1652 dead transitions. [2023-08-29 19:59:06,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1652 transitions, 20164 flow [2023-08-29 19:59:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-29 19:59:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-29 19:59:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4088 transitions. [2023-08-29 19:59:06,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35299196960538815 [2023-08-29 19:59:06,125 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4088 transitions. [2023-08-29 19:59:06,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4088 transitions. [2023-08-29 19:59:06,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:59:06,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4088 transitions. [2023-08-29 19:59:06,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 110.48648648648648) internal successors, (4088), 37 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states 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 19:59:06,145 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 19:59:06,146 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 19:59:06,147 INFO L175 Difference]: Start difference. First operand has 224 places, 311 transitions, 3067 flow. Second operand 37 states and 4088 transitions. [2023-08-29 19:59:06,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1652 transitions, 20164 flow [2023-08-29 19:59:06,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1652 transitions, 19595 flow, removed 53 selfloop flow, removed 19 redundant places. [2023-08-29 19:59:06,448 INFO L231 Difference]: Finished difference. Result has 255 places, 402 transitions, 4525 flow [2023-08-29 19:59:06,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4525, PETRI_PLACES=255, PETRI_TRANSITIONS=402} [2023-08-29 19:59:06,448 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 188 predicate places. [2023-08-29 19:59:06,449 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 402 transitions, 4525 flow [2023-08-29 19:59:06,449 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 19:59:06,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:59:06,449 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 19:59:06,461 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 19:59:06,656 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,SelfDestructingSolverStorable24 [2023-08-29 19:59:06,656 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 19:59:06,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:59:06,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1438216747, now seen corresponding path program 3 times [2023-08-29 19:59:06,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:59:06,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699879859] [2023-08-29 19:59:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:59:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:59:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:59:07,928 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 19:59:07,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:59:07,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699879859] [2023-08-29 19:59:07,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699879859] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:59:07,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220482840] [2023-08-29 19:59:07,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-29 19:59:07,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:59:07,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:59:07,931 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 19:59:07,933 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 19:59:20,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-08-29 19:59:20,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 19:59:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 2064 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-29 19:59:20,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:59:21,408 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 19:59:21,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:59:22,123 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 19:59:22,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220482840] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:59:22,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:59:22,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 36 [2023-08-29 19:59:22,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858000226] [2023-08-29 19:59:22,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:59:22,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-29 19:59:22,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:59:22,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-29 19:59:22,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2023-08-29 19:59:22,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 19:59:22,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 402 transitions, 4525 flow. Second operand has 38 states, 38 states have (on average 109.13157894736842) internal successors, (4147), 38 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states 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 19:59:22,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:59:22,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 19:59:22,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 20:00:07,649 INFO L130 PetriNetUnfolder]: 4357/12249 cut-off events. [2023-08-29 20:00:07,650 INFO L131 PetriNetUnfolder]: For 268126/268126 co-relation queries the response was YES. [2023-08-29 20:00:07,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92515 conditions, 12249 events. 4357/12249 cut-off events. For 268126/268126 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 75331 event pairs, 193 based on Foata normal form. 288/12394 useless extension candidates. Maximal degree in co-relation 92438. Up to 4242 conditions per place. [2023-08-29 20:00:07,744 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 3007 selfloop transitions, 272 changer transitions 29/3309 dead transitions. [2023-08-29 20:00:07,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 3309 transitions, 41382 flow [2023-08-29 20:00:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-29 20:00:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-29 20:00:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 7670 transitions. [2023-08-29 20:00:07,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3551419178589619 [2023-08-29 20:00:07,753 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 7670 transitions. [2023-08-29 20:00:07,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 7670 transitions. [2023-08-29 20:00:07,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 20:00:07,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 7670 transitions. [2023-08-29 20:00:07,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 111.15942028985508) internal successors, (7670), 69 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states 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 20:00:07,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 313.0) internal successors, (21910), 70 states have internal predecessors, (21910), 0 states have call successors, (0), 0 states 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 20:00:07,785 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 313.0) internal successors, (21910), 70 states have internal predecessors, (21910), 0 states have call successors, (0), 0 states 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 20:00:07,785 INFO L175 Difference]: Start difference. First operand has 255 places, 402 transitions, 4525 flow. Second operand 69 states and 7670 transitions. [2023-08-29 20:00:07,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 3309 transitions, 41382 flow [2023-08-29 20:00:08,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 3309 transitions, 41285 flow, removed 22 selfloop flow, removed 14 redundant places. [2023-08-29 20:00:08,569 INFO L231 Difference]: Finished difference. Result has 337 places, 541 transitions, 7698 flow [2023-08-29 20:00:08,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=7698, PETRI_PLACES=337, PETRI_TRANSITIONS=541} [2023-08-29 20:00:08,570 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 270 predicate places. [2023-08-29 20:00:08,571 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 541 transitions, 7698 flow [2023-08-29 20:00:08,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 109.13157894736842) internal successors, (4147), 38 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states 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 20:00:08,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 20:00:08,572 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 20:00:08,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-29 20:00:08,781 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,SelfDestructingSolverStorable25 [2023-08-29 20:00:08,781 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thr1Err25ASSERT_VIOLATIONARRAY_INDEX === [thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-29 20:00:08,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 20:00:08,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1645531525, now seen corresponding path program 4 times [2023-08-29 20:00:08,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 20:00:08,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090040587] [2023-08-29 20:00:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 20:00:08,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 20:00:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 20:00:12,559 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 20:00:12,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 20:00:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090040587] [2023-08-29 20:00:12,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090040587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 20:00:12,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891707752] [2023-08-29 20:00:12,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-29 20:00:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 20:00:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 20:00:12,565 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 20:00:12,570 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 20:01:00,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-29 20:01:00,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-29 20:01:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 4144 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-29 20:01:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 20:01:01,632 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 20:01:01,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 20:01:03,682 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 20:01:03,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891707752] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 20:01:03,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 20:01:03,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 67 [2023-08-29 20:01:03,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411746115] [2023-08-29 20:01:03,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 20:01:03,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-08-29 20:01:03,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 20:01:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-08-29 20:01:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1100, Invalid=3592, Unknown=0, NotChecked=0, Total=4692 [2023-08-29 20:01:05,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 313 [2023-08-29 20:01:05,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 541 transitions, 7698 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 20:01:05,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 20:01:05,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 313 [2023-08-29 20:01:05,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15