./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 804a6f1d000a9eac5cab22029525644887c7b13b33bf8b82b475e09952d467ca --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 02:33:20,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 02:33:20,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 02:33:20,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 02:33:20,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 02:33:20,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 02:33:20,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 02:33:20,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 02:33:20,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 02:33:20,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 02:33:20,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 02:33:20,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 02:33:20,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 02:33:20,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 02:33:20,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 02:33:20,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 02:33:20,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 02:33:20,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 02:33:20,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 02:33:20,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 02:33:20,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 02:33:20,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 02:33:20,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 02:33:20,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 02:33:20,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 02:33:20,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 02:33:20,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 02:33:20,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 02:33:20,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 02:33:20,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 02:33:20,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 02:33:20,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 02:33:20,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 02:33:20,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 02:33:20,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 02:33:20,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 02:33:20,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 02:33:20,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 02:33:20,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 02:33:20,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 02:33:20,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 02:33:20,289 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-09-01 02:33:20,324 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 02:33:20,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 02:33:20,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 02:33:20,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 02:33:20,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 02:33:20,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 02:33:20,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 02:33:20,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 02:33:20,327 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 02:33:20,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 02:33:20,328 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 02:33:20,328 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-09-01 02:33:20,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 02:33:20,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 02:33:20,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 02:33:20,329 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-09-01 02:33:20,329 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-09-01 02:33:20,329 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-09-01 02:33:20,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 02:33:20,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-09-01 02:33:20,330 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 02:33:20,330 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 02:33:20,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 02:33:20,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 02:33:20,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 02:33:20,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:33:20,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 02:33:20,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 02:33:20,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 02:33:20,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 02:33:20,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 02:33:20,332 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 02:33:20,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 02:33:20,333 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 02:33:20,333 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 804a6f1d000a9eac5cab22029525644887c7b13b33bf8b82b475e09952d467ca Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 02:33:20,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 02:33:20,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 02:33:20,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 02:33:20,633 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 02:33:20,633 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 02:33:20,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c [2023-09-01 02:33:21,746 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 02:33:21,985 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 02:33:21,985 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c [2023-09-01 02:33:21,995 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa7ca84fc/80ca69843c1d4b3582762f35558a0c26/FLAG2529df5c0 [2023-09-01 02:33:22,021 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa7ca84fc/80ca69843c1d4b3582762f35558a0c26 [2023-09-01 02:33:22,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 02:33:22,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 02:33:22,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 02:33:22,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 02:33:22,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 02:33:22,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a883df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22, skipping insertion in model container [2023-09-01 02:33:22,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 02:33:22,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 02:33:22,224 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c[4837,4850] [2023-09-01 02:33:22,229 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:33:22,238 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 02:33:22,265 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-7.wvr.c[4837,4850] [2023-09-01 02:33:22,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 02:33:22,274 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:33:22,275 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 02:33:22,281 INFO L208 MainTranslator]: Completed translation [2023-09-01 02:33:22,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22 WrapperNode [2023-09-01 02:33:22,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 02:33:22,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 02:33:22,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 02:33:22,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 02:33:22,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,361 INFO L138 Inliner]: procedures = 26, calls = 115, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 329 [2023-09-01 02:33:22,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 02:33:22,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 02:33:22,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 02:33:22,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 02:33:22,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,415 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 02:33:22,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 02:33:22,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 02:33:22,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 02:33:22,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (1/1) ... [2023-09-01 02:33:22,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 02:33:22,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 02:33:22,466 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) [2023-09-01 02:33:22,488 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 [2023-09-01 02:33:22,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 02:33:22,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 02:33:22,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 02:33:22,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 02:33:22,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 02:33:22,505 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 02:33:22,505 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 02:33:22,505 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 02:33:22,505 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 02:33:22,505 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 02:33:22,505 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 02:33:22,505 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 02:33:22,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 02:33:22,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-09-01 02:33:22,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-09-01 02:33:22,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-09-01 02:33:22,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-09-01 02:33:22,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2023-09-01 02:33:22,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2023-09-01 02:33:22,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 02:33:22,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 02:33:22,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 02:33:22,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 02:33:22,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 02:33:22,509 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 02:33:22,676 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 02:33:22,678 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 02:33:23,102 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 02:33:23,211 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 02:33:23,211 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-09-01 02:33:23,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:33:23 BoogieIcfgContainer [2023-09-01 02:33:23,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 02:33:23,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 02:33:23,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 02:33:23,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 02:33:23,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:33:22" (1/3) ... [2023-09-01 02:33:23,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ac28ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:33:23, skipping insertion in model container [2023-09-01 02:33:23,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:33:22" (2/3) ... [2023-09-01 02:33:23,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ac28ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:33:23, skipping insertion in model container [2023-09-01 02:33:23,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:33:23" (3/3) ... [2023-09-01 02:33:23,230 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-7.wvr.c [2023-09-01 02:33:23,245 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 02:33:23,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-09-01 02:33:23,246 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 02:33:23,360 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-09-01 02:33:23,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 247 transitions, 550 flow [2023-09-01 02:33:23,546 INFO L130 PetriNetUnfolder]: 2/240 cut-off events. [2023-09-01 02:33:23,546 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 02:33:23,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 240 events. 2/240 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 187 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-09-01 02:33:23,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 247 transitions, 550 flow [2023-09-01 02:33:23,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 236 transitions, 514 flow [2023-09-01 02:33:23,560 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 02:33:23,568 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 236 transitions, 514 flow [2023-09-01 02:33:23,571 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 236 transitions, 514 flow [2023-09-01 02:33:23,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 236 transitions, 514 flow [2023-09-01 02:33:23,631 INFO L130 PetriNetUnfolder]: 2/236 cut-off events. [2023-09-01 02:33:23,631 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 02:33:23,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 236 events. 2/236 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 186 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-09-01 02:33:23,636 INFO L119 LiptonReduction]: Number of co-enabled transitions 5386 [2023-09-01 02:33:35,523 INFO L134 LiptonReduction]: Checked pairs total: 30503 [2023-09-01 02:33:35,524 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-09-01 02:33:35,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 02:33:35,543 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;@38dd1d23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 02:33:35,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-09-01 02:33:35,546 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2023-09-01 02:33:35,546 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-09-01 02:33:35,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:33:35,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-09-01 02:33:35,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:33:35,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:33:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash 971, now seen corresponding path program 1 times [2023-09-01 02:33:35,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:33:35,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706544112] [2023-09-01 02:33:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:33:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:33:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:33:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:33:35,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:33:35,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706544112] [2023-09-01 02:33:35,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706544112] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:33:35,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:33:35,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-09-01 02:33:35,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415432172] [2023-09-01 02:33:35,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:33:35,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-09-01 02:33:35,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:33:35,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-09-01 02:33:35,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-09-01 02:33:35,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 452 [2023-09-01 02:33:35,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 87 transitions, 216 flow. Second operand has 2 states, 2 states have (on average 209.5) internal successors, (419), 2 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:33:35,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:33:35,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 452 [2023-09-01 02:33:35,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:13,957 INFO L130 PetriNetUnfolder]: 513369/645528 cut-off events. [2023-09-01 02:34:13,957 INFO L131 PetriNetUnfolder]: For 13379/13379 co-relation queries the response was YES. [2023-09-01 02:34:15,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284508 conditions, 645528 events. 513369/645528 cut-off events. For 13379/13379 co-relation queries the response was YES. Maximal size of possible extension queue 20238. Compared 4205744 event pairs, 513369 based on Foata normal form. 0/586275 useless extension candidates. Maximal degree in co-relation 1049660. Up to 622589 conditions per place. [2023-09-01 02:34:17,888 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 76 selfloop transitions, 0 changer transitions 0/84 dead transitions. [2023-09-01 02:34:17,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 84 transitions, 362 flow [2023-09-01 02:34:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-09-01 02:34:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-09-01 02:34:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 497 transitions. [2023-09-01 02:34:17,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497787610619469 [2023-09-01 02:34:17,902 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 497 transitions. [2023-09-01 02:34:17,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 497 transitions. [2023-09-01 02:34:17,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:34:17,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 497 transitions. [2023-09-01 02:34:17,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 248.5) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:17,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:17,915 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:17,916 INFO L175 Difference]: Start difference. First operand has 109 places, 87 transitions, 216 flow. Second operand 2 states and 497 transitions. [2023-09-01 02:34:17,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 84 transitions, 362 flow [2023-09-01 02:34:25,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 84 transitions, 334 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-09-01 02:34:25,622 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 182 flow [2023-09-01 02:34:25,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2023-09-01 02:34:25,628 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -16 predicate places. [2023-09-01 02:34:25,628 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 182 flow [2023-09-01 02:34:25,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 209.5) internal successors, (419), 2 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:25,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:34:25,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:34:25,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 02:34:25,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:34:25,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:34:25,630 INFO L85 PathProgramCache]: Analyzing trace with hash 954471, now seen corresponding path program 1 times [2023-09-01 02:34:25,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:34:25,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339317419] [2023-09-01 02:34:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:34:25,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:34:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:34:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:34:26,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:34:26,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339317419] [2023-09-01 02:34:26,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339317419] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:34:26,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:34:26,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:34:26,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416871838] [2023-09-01 02:34:26,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:34:26,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:34:26,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:34:26,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:34:26,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:34:26,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-09-01 02:34:26,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:34:26,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:34:26,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-09-01 02:34:26,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:34:59,332 INFO L130 PetriNetUnfolder]: 494934/622991 cut-off events. [2023-09-01 02:34:59,333 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:35:00,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1228508 conditions, 622991 events. 494934/622991 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19992. Compared 4062477 event pairs, 494934 based on Foata normal form. 0/567838 useless extension candidates. Maximal degree in co-relation 1228505. Up to 600053 conditions per place. [2023-09-01 02:35:04,001 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 73 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-09-01 02:35:04,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 82 transitions, 326 flow [2023-09-01 02:35:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:35:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:35:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 688 transitions. [2023-09-01 02:35:04,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073746312684366 [2023-09-01 02:35:04,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 688 transitions. [2023-09-01 02:35:04,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 688 transitions. [2023-09-01 02:35:04,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:35:04,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 688 transitions. [2023-09-01 02:35:04,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.33333333333334) internal successors, (688), 3 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:04,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:04,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:04,047 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 182 flow. Second operand 3 states and 688 transitions. [2023-09-01 02:35:04,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 82 transitions, 326 flow [2023-09-01 02:35:04,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 82 transitions, 326 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 02:35:04,051 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 180 flow [2023-09-01 02:35:04,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2023-09-01 02:35:04,052 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -16 predicate places. [2023-09-01 02:35:04,053 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 180 flow [2023-09-01 02:35:04,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:04,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:35:04,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-09-01 02:35:04,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 02:35:04,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:35:04,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:35:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash 954473, now seen corresponding path program 1 times [2023-09-01 02:35:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:35:04,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913172965] [2023-09-01 02:35:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:35:04,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:35:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:35:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:35:04,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:35:04,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913172965] [2023-09-01 02:35:04,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913172965] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:35:04,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:35:04,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:35:04,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281760567] [2023-09-01 02:35:04,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:35:04,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:35:04,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:35:04,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:35:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:35:05,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-09-01 02:35:05,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:05,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:35:05,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-09-01 02:35:05,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:35:34,790 INFO L130 PetriNetUnfolder]: 476499/600454 cut-off events. [2023-09-01 02:35:34,790 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:35:35,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1183438 conditions, 600454 events. 476499/600454 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3920233 event pairs, 476499 based on Foata normal form. 0/549401 useless extension candidates. Maximal degree in co-relation 1183434. Up to 577518 conditions per place. [2023-09-01 02:35:37,935 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 71 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-09-01 02:35:37,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 80 transitions, 320 flow [2023-09-01 02:35:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:35:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:35:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-09-01 02:35:37,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4859882005899705 [2023-09-01 02:35:37,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-09-01 02:35:37,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-09-01 02:35:37,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:35:37,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-09-01 02:35:37,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:37,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:37,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:37,944 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 180 flow. Second operand 3 states and 659 transitions. [2023-09-01 02:35:37,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 80 transitions, 320 flow [2023-09-01 02:35:37,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 80 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:35:37,946 INFO L231 Difference]: Finished difference. Result has 92 places, 80 transitions, 177 flow [2023-09-01 02:35:37,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=92, PETRI_TRANSITIONS=80} [2023-09-01 02:35:37,947 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -17 predicate places. [2023-09-01 02:35:37,948 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 80 transitions, 177 flow [2023-09-01 02:35:37,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:37,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:35:37,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:35:37,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 02:35:37,949 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:35:37,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:35:37,949 INFO L85 PathProgramCache]: Analyzing trace with hash 917270692, now seen corresponding path program 1 times [2023-09-01 02:35:37,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:35:37,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062738423] [2023-09-01 02:35:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:35:37,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:35:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:35:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:35:38,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:35:38,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062738423] [2023-09-01 02:35:38,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062738423] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:35:38,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:35:38,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:35:38,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865722565] [2023-09-01 02:35:38,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:35:38,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:35:38,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:35:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:35:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:35:38,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-09-01 02:35:38,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 80 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:35:38,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:35:38,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-09-01 02:35:38,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:36:07,435 INFO L130 PetriNetUnfolder]: 472635/595546 cut-off events. [2023-09-01 02:36:07,436 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:36:08,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173627 conditions, 595546 events. 472635/595546 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3888940 event pairs, 472635 based on Foata normal form. 0/545534 useless extension candidates. Maximal degree in co-relation 1173623. Up to 572614 conditions per place. [2023-09-01 02:36:10,580 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 69 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-09-01 02:36:10,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 78 transitions, 313 flow [2023-09-01 02:36:10,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:36:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:36:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 657 transitions. [2023-09-01 02:36:10,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48451327433628316 [2023-09-01 02:36:10,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 657 transitions. [2023-09-01 02:36:10,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 657 transitions. [2023-09-01 02:36:10,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:36:10,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 657 transitions. [2023-09-01 02:36:10,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:10,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:10,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:10,588 INFO L175 Difference]: Start difference. First operand has 92 places, 80 transitions, 177 flow. Second operand 3 states and 657 transitions. [2023-09-01 02:36:10,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 78 transitions, 313 flow [2023-09-01 02:36:10,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 78 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:36:10,591 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 174 flow [2023-09-01 02:36:10,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2023-09-01 02:36:10,592 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -18 predicate places. [2023-09-01 02:36:10,593 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 174 flow [2023-09-01 02:36:10,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:10,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:36:10,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-09-01 02:36:10,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 02:36:10,594 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:36:10,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:36:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash 917270693, now seen corresponding path program 1 times [2023-09-01 02:36:10,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:36:10,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818869834] [2023-09-01 02:36:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:36:10,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:36:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:36:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:36:11,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:36:11,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818869834] [2023-09-01 02:36:11,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818869834] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:36:11,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:36:11,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:36:11,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65567005] [2023-09-01 02:36:11,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:36:11,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:36:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:36:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:36:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:36:11,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-09-01 02:36:11,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:11,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:36:11,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-09-01 02:36:11,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:36:40,072 INFO L130 PetriNetUnfolder]: 468771/590638 cut-off events. [2023-09-01 02:36:40,072 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:36:41,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163816 conditions, 590638 events. 468771/590638 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3857420 event pairs, 468771 based on Foata normal form. 0/541667 useless extension candidates. Maximal degree in co-relation 1163812. Up to 567710 conditions per place. [2023-09-01 02:36:44,109 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 67 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-09-01 02:36:44,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 76 transitions, 306 flow [2023-09-01 02:36:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:36:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:36:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-09-01 02:36:44,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029498525073747 [2023-09-01 02:36:44,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-09-01 02:36:44,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-09-01 02:36:44,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:36:44,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-09-01 02:36:44,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:44,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:44,128 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:44,128 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 174 flow. Second operand 3 states and 682 transitions. [2023-09-01 02:36:44,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 76 transitions, 306 flow [2023-09-01 02:36:44,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 76 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:36:44,136 INFO L231 Difference]: Finished difference. Result has 90 places, 76 transitions, 171 flow [2023-09-01 02:36:44,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=90, PETRI_TRANSITIONS=76} [2023-09-01 02:36:44,141 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -19 predicate places. [2023-09-01 02:36:44,141 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 76 transitions, 171 flow [2023-09-01 02:36:44,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:44,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:36:44,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:36:44,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 02:36:44,143 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:36:44,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:36:44,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1028861716, now seen corresponding path program 1 times [2023-09-01 02:36:44,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:36:44,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7658703] [2023-09-01 02:36:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:36:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:36:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:36:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:36:44,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:36:44,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7658703] [2023-09-01 02:36:44,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7658703] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:36:44,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:36:44,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:36:44,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656234354] [2023-09-01 02:36:44,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:36:44,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:36:44,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:36:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:36:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:36:44,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-09-01 02:36:44,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:36:44,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:36:44,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-09-01 02:36:44,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:37:18,840 INFO L130 PetriNetUnfolder]: 467859/589390 cut-off events. [2023-09-01 02:37:18,841 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:37:20,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161337 conditions, 589390 events. 467859/589390 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3849260 event pairs, 467859 based on Foata normal form. 0/540743 useless extension candidates. Maximal degree in co-relation 1161333. Up to 566478 conditions per place. [2023-09-01 02:37:23,271 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 65 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-09-01 02:37:23,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 299 flow [2023-09-01 02:37:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:37:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:37:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2023-09-01 02:37:23,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014749262536873 [2023-09-01 02:37:23,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2023-09-01 02:37:23,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2023-09-01 02:37:23,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:37:23,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2023-09-01 02:37:23,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:37:23,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:37:23,306 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:37:23,306 INFO L175 Difference]: Start difference. First operand has 90 places, 76 transitions, 171 flow. Second operand 3 states and 680 transitions. [2023-09-01 02:37:23,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 299 flow [2023-09-01 02:37:23,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 74 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:37:23,309 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 168 flow [2023-09-01 02:37:23,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2023-09-01 02:37:23,312 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -20 predicate places. [2023-09-01 02:37:23,312 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 168 flow [2023-09-01 02:37:23,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:37:23,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:37:23,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:37:23,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 02:37:23,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:37:23,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:37:23,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1028861715, now seen corresponding path program 1 times [2023-09-01 02:37:23,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:37:23,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128210088] [2023-09-01 02:37:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:37:23,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:37:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:37:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:37:23,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:37:23,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128210088] [2023-09-01 02:37:23,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128210088] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:37:23,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:37:23,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:37:23,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069552594] [2023-09-01 02:37:23,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:37:23,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:37:23,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:37:23,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:37:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:37:23,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-09-01 02:37:23,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:37:23,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:37:23,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-09-01 02:37:23,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:37:56,568 INFO L130 PetriNetUnfolder]: 466947/588142 cut-off events. [2023-09-01 02:37:56,568 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:37:58,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158858 conditions, 588142 events. 466947/588142 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3841805 event pairs, 466947 based on Foata normal form. 0/539819 useless extension candidates. Maximal degree in co-relation 1158854. Up to 565246 conditions per place. [2023-09-01 02:38:01,235 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 63 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2023-09-01 02:38:01,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 72 transitions, 292 flow [2023-09-01 02:38:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:38:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:38:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2023-09-01 02:38:01,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48008849557522126 [2023-09-01 02:38:01,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2023-09-01 02:38:01,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2023-09-01 02:38:01,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:38:01,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2023-09-01 02:38:01,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:01,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:01,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:01,261 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 168 flow. Second operand 3 states and 651 transitions. [2023-09-01 02:38:01,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 72 transitions, 292 flow [2023-09-01 02:38:01,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 72 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:38:01,271 INFO L231 Difference]: Finished difference. Result has 88 places, 72 transitions, 165 flow [2023-09-01 02:38:01,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=88, PETRI_TRANSITIONS=72} [2023-09-01 02:38:01,272 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -21 predicate places. [2023-09-01 02:38:01,273 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 72 transitions, 165 flow [2023-09-01 02:38:01,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:01,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:38:01,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:38:01,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 02:38:01,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:38:01,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:38:01,274 INFO L85 PathProgramCache]: Analyzing trace with hash 893655106, now seen corresponding path program 1 times [2023-09-01 02:38:01,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:38:01,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616071964] [2023-09-01 02:38:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:38:01,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:38:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:38:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:38:01,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:38:01,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616071964] [2023-09-01 02:38:01,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616071964] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:38:01,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:38:01,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:38:01,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371039214] [2023-09-01 02:38:01,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:38:01,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:38:01,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:38:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:38:01,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:38:01,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-09-01 02:38:01,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 72 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:01,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:38:01,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-09-01 02:38:01,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:38:35,935 INFO L130 PetriNetUnfolder]: 466035/586846 cut-off events. [2023-09-01 02:38:35,935 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:38:37,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156331 conditions, 586846 events. 466035/586846 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3831928 event pairs, 466035 based on Foata normal form. 0/538843 useless extension candidates. Maximal degree in co-relation 1156327. Up to 564014 conditions per place. [2023-09-01 02:38:40,804 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 61 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-09-01 02:38:40,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 70 transitions, 285 flow [2023-09-01 02:38:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:38:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:38:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2023-09-01 02:38:40,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49852507374631266 [2023-09-01 02:38:40,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2023-09-01 02:38:40,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2023-09-01 02:38:40,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:38:40,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2023-09-01 02:38:40,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:40,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:40,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:40,811 INFO L175 Difference]: Start difference. First operand has 88 places, 72 transitions, 165 flow. Second operand 3 states and 676 transitions. [2023-09-01 02:38:40,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 70 transitions, 285 flow [2023-09-01 02:38:40,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 70 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:38:40,813 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 162 flow [2023-09-01 02:38:40,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2023-09-01 02:38:40,816 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -22 predicate places. [2023-09-01 02:38:40,816 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 162 flow [2023-09-01 02:38:40,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:40,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:38:40,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:38:40,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 02:38:40,817 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:38:40,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:38:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash 893655104, now seen corresponding path program 1 times [2023-09-01 02:38:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:38:40,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205327792] [2023-09-01 02:38:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:38:40,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:38:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:38:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:38:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:38:41,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205327792] [2023-09-01 02:38:41,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205327792] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:38:41,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:38:41,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:38:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213659142] [2023-09-01 02:38:41,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:38:41,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:38:41,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:38:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:38:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:38:41,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-09-01 02:38:41,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 70 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:38:41,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:38:41,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-09-01 02:38:41,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:16,056 INFO L130 PetriNetUnfolder]: 465123/585550 cut-off events. [2023-09-01 02:39:16,056 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:39:18,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153804 conditions, 585550 events. 465123/585550 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19746. Compared 3821494 event pairs, 465123 based on Foata normal form. 0/537867 useless extension candidates. Maximal degree in co-relation 1153800. Up to 562782 conditions per place. [2023-09-01 02:39:20,695 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 59 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-09-01 02:39:20,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 68 transitions, 278 flow [2023-09-01 02:39:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2023-09-01 02:39:20,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4771386430678466 [2023-09-01 02:39:20,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2023-09-01 02:39:20,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2023-09-01 02:39:20,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:20,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2023-09-01 02:39:20,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:20,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:20,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:20,702 INFO L175 Difference]: Start difference. First operand has 87 places, 70 transitions, 162 flow. Second operand 3 states and 647 transitions. [2023-09-01 02:39:20,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 68 transitions, 278 flow [2023-09-01 02:39:20,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 68 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:20,710 INFO L231 Difference]: Finished difference. Result has 86 places, 68 transitions, 159 flow [2023-09-01 02:39:20,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=86, PETRI_TRANSITIONS=68} [2023-09-01 02:39:20,711 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -23 predicate places. [2023-09-01 02:39:20,711 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 68 transitions, 159 flow [2023-09-01 02:39:20,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:20,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:20,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:39:20,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 02:39:20,712 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:39:20,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash -190879879, now seen corresponding path program 1 times [2023-09-01 02:39:20,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:39:20,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735904204] [2023-09-01 02:39:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:20,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:39:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:39:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:39:20,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:39:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735904204] [2023-09-01 02:39:20,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735904204] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:39:20,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:39:20,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:39:20,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027294414] [2023-09-01 02:39:20,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:39:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:39:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:39:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:39:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:39:21,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-09-01 02:39:21,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 68 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:21,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:39:21,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-09-01 02:39:21,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:39:55,047 INFO L130 PetriNetUnfolder]: 461259/580390 cut-off events. [2023-09-01 02:39:55,047 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:39:57,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143741 conditions, 580390 events. 461259/580390 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19706. Compared 3781962 event pairs, 461259 based on Foata normal form. 0/533811 useless extension candidates. Maximal degree in co-relation 1143737. Up to 557878 conditions per place. [2023-09-01 02:39:59,951 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 57 selfloop transitions, 1 changer transitions 0/66 dead transitions. [2023-09-01 02:39:59,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 66 transitions, 271 flow [2023-09-01 02:39:59,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:39:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:39:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-09-01 02:39:59,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756637168141593 [2023-09-01 02:39:59,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-09-01 02:39:59,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-09-01 02:39:59,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:39:59,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-09-01 02:39:59,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:59,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:59,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:59,958 INFO L175 Difference]: Start difference. First operand has 86 places, 68 transitions, 159 flow. Second operand 3 states and 645 transitions. [2023-09-01 02:39:59,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 66 transitions, 271 flow [2023-09-01 02:39:59,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 66 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:39:59,962 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 156 flow [2023-09-01 02:39:59,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2023-09-01 02:39:59,963 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -24 predicate places. [2023-09-01 02:39:59,963 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 156 flow [2023-09-01 02:39:59,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:39:59,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:39:59,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:39:59,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-09-01 02:39:59,964 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:39:59,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:39:59,965 INFO L85 PathProgramCache]: Analyzing trace with hash -190879880, now seen corresponding path program 1 times [2023-09-01 02:39:59,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:39:59,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823235459] [2023-09-01 02:39:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:39:59,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:40:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:00,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:40:00,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823235459] [2023-09-01 02:40:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823235459] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:00,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:00,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:40:00,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062262192] [2023-09-01 02:40:00,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:00,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:40:00,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:40:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:40:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:40:00,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-09-01 02:40:00,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:00,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:00,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-09-01 02:40:00,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:40:34,293 INFO L130 PetriNetUnfolder]: 457395/575230 cut-off events. [2023-09-01 02:40:34,293 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:40:36,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133678 conditions, 575230 events. 457395/575230 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 19666. Compared 3743631 event pairs, 457395 based on Foata normal form. 0/529755 useless extension candidates. Maximal degree in co-relation 1133674. Up to 552974 conditions per place. [2023-09-01 02:40:39,453 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 55 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-09-01 02:40:39,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 64 transitions, 264 flow [2023-09-01 02:40:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:40:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:40:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 670 transitions. [2023-09-01 02:40:39,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941002949852507 [2023-09-01 02:40:39,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 670 transitions. [2023-09-01 02:40:39,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 670 transitions. [2023-09-01 02:40:39,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:40:39,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 670 transitions. [2023-09-01 02:40:39,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:39,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:39,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:39,459 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 156 flow. Second operand 3 states and 670 transitions. [2023-09-01 02:40:39,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 64 transitions, 264 flow [2023-09-01 02:40:39,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 64 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:40:39,461 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 153 flow [2023-09-01 02:40:39,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2023-09-01 02:40:39,462 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -25 predicate places. [2023-09-01 02:40:39,462 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 153 flow [2023-09-01 02:40:39,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:39,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:40:39,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:40:39,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 02:40:39,463 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:40:39,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:40:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1248054198, now seen corresponding path program 1 times [2023-09-01 02:40:39,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:40:39,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104718060] [2023-09-01 02:40:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:40:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:40:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:40:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:40:39,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:40:39,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104718060] [2023-09-01 02:40:39,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104718060] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:40:39,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:40:39,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:40:39,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866822592] [2023-09-01 02:40:39,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:40:39,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:40:39,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:40:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:40:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:40:39,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 452 [2023-09-01 02:40:39,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:40:39,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:40:39,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 452 [2023-09-01 02:40:39,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:41:12,670 INFO L130 PetriNetUnfolder]: 438960/551671 cut-off events. [2023-09-01 02:41:12,670 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:41:15,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087585 conditions, 551671 events. 438960/551671 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 18922. Compared 3568052 event pairs, 438960 based on Foata normal form. 0/510296 useless extension candidates. Maximal degree in co-relation 1087581. Up to 530439 conditions per place. [2023-09-01 02:41:17,734 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 53 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-09-01 02:41:17,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 62 transitions, 257 flow [2023-09-01 02:41:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:41:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:41:17,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-09-01 02:41:17,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49262536873156343 [2023-09-01 02:41:17,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-09-01 02:41:17,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-09-01 02:41:17,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:41:17,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-09-01 02:41:17,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:17,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:17,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:17,741 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 153 flow. Second operand 3 states and 668 transitions. [2023-09-01 02:41:17,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 62 transitions, 257 flow [2023-09-01 02:41:17,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 62 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:41:17,743 INFO L231 Difference]: Finished difference. Result has 83 places, 62 transitions, 150 flow [2023-09-01 02:41:17,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=83, PETRI_TRANSITIONS=62} [2023-09-01 02:41:17,744 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -26 predicate places. [2023-09-01 02:41:17,744 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 62 transitions, 150 flow [2023-09-01 02:41:17,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:17,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:41:17,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:41:17,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 02:41:17,745 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:41:17,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:41:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1248054196, now seen corresponding path program 1 times [2023-09-01 02:41:17,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:41:17,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136102013] [2023-09-01 02:41:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:41:17,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:41:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:41:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:17,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:41:17,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136102013] [2023-09-01 02:41:17,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136102013] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:41:17,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:41:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:41:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962318625] [2023-09-01 02:41:17,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:41:17,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:41:17,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:41:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:41:17,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:41:17,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 452 [2023-09-01 02:41:17,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 62 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:17,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:41:17,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 452 [2023-09-01 02:41:17,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:41:48,738 INFO L130 PetriNetUnfolder]: 420525/528112 cut-off events. [2023-09-01 02:41:48,739 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:41:51,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041492 conditions, 528112 events. 420525/528112 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 18178. Compared 3392992 event pairs, 420525 based on Foata normal form. 0/490837 useless extension candidates. Maximal degree in co-relation 1041488. Up to 507904 conditions per place. [2023-09-01 02:41:53,654 INFO L137 encePairwiseOnDemand]: 449/452 looper letters, 51 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-09-01 02:41:53,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 60 transitions, 250 flow [2023-09-01 02:41:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:41:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:41:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-09-01 02:41:53,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47123893805309736 [2023-09-01 02:41:53,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-09-01 02:41:53,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-09-01 02:41:53,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:41:53,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-09-01 02:41:53,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:53,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:53,661 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:53,662 INFO L175 Difference]: Start difference. First operand has 83 places, 62 transitions, 150 flow. Second operand 3 states and 639 transitions. [2023-09-01 02:41:53,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 60 transitions, 250 flow [2023-09-01 02:41:53,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 60 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:41:53,664 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 147 flow [2023-09-01 02:41:53,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2023-09-01 02:41:53,665 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -27 predicate places. [2023-09-01 02:41:53,665 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 147 flow [2023-09-01 02:41:53,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:53,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:41:53,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:41:53,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 02:41:53,666 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:41:53,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:41:53,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1084231166, now seen corresponding path program 1 times [2023-09-01 02:41:53,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:41:53,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649926877] [2023-09-01 02:41:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:41:53,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:41:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:41:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:41:53,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:41:53,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649926877] [2023-09-01 02:41:53,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649926877] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:41:53,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:41:53,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-09-01 02:41:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972232328] [2023-09-01 02:41:53,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:41:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 02:41:53,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:41:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 02:41:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 02:41:53,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 452 [2023-09-01 02:41:53,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:41:53,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:41:53,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 452 [2023-09-01 02:41:53,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 02:42:17,318 INFO L130 PetriNetUnfolder]: 334509/421616 cut-off events. [2023-09-01 02:42:17,319 INFO L131 PetriNetUnfolder]: For 2048/2048 co-relation queries the response was YES. [2023-09-01 02:42:18,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832597 conditions, 421616 events. 334509/421616 cut-off events. For 2048/2048 co-relation queries the response was YES. Maximal size of possible extension queue 14174. Compared 2681142 event pairs, 334509 based on Foata normal form. 0/401749 useless extension candidates. Maximal degree in co-relation 832593. Up to 405504 conditions per place. [2023-09-01 02:42:20,022 INFO L137 encePairwiseOnDemand]: 450/452 looper letters, 50 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-09-01 02:42:20,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 59 transitions, 247 flow [2023-09-01 02:42:20,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 02:42:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 02:42:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-09-01 02:42:20,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471976401179941 [2023-09-01 02:42:20,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-09-01 02:42:20,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-09-01 02:42:20,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 02:42:20,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-09-01 02:42:20,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:20,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:20,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:20,029 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 147 flow. Second operand 3 states and 640 transitions. [2023-09-01 02:42:20,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 59 transitions, 247 flow [2023-09-01 02:42:20,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 59 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 02:42:20,032 INFO L231 Difference]: Finished difference. Result has 82 places, 59 transitions, 146 flow [2023-09-01 02:42:20,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2023-09-01 02:42:20,032 INFO L281 CegarLoopForPetriNet]: 109 programPoint places, -27 predicate places. [2023-09-01 02:42:20,033 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 146 flow [2023-09-01 02:42:20,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:20,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 02:42:20,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 02:42:20,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 02:42:20,034 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-09-01 02:42:20,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 02:42:20,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1084231165, now seen corresponding path program 1 times [2023-09-01 02:42:20,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 02:42:20,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585640648] [2023-09-01 02:42:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 02:42:20,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 02:42:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 02:42:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 02:42:20,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 02:42:20,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585640648] [2023-09-01 02:42:20,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585640648] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 02:42:20,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 02:42:20,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-09-01 02:42:20,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213120613] [2023-09-01 02:42:20,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 02:42:20,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 02:42:20,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 02:42:20,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 02:42:20,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-09-01 02:42:20,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 452 [2023-09-01 02:42:20,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 02:42:20,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 02:42:20,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 452 [2023-09-01 02:42:20,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15