./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/queue.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/queue.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:29:15,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:29:15,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:29:15,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:29:15,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:29:15,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:29:15,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:29:15,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:29:15,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:29:15,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:29:15,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:29:15,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:29:15,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:29:15,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:29:15,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:29:15,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:29:15,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:29:15,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:29:15,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:29:15,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:29:15,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:29:15,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:29:15,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:29:15,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:29:15,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:29:15,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:29:15,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:29:15,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:29:15,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:29:15,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:29:15,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:29:15,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:29:15,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:29:15,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:29:15,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:29:15,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:29:15,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:29:15,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:29:15,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:29:15,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:29:15,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:29:15,616 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:29:15,648 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:29:15,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:29:15,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:29:15,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:29:15,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:29:15,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:29:15,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:29:15,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:29:15,652 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:29:15,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:29:15,653 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:29:15,654 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:29:15,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:29:15,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:29:15,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:29:15,654 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:29:15,654 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:29:15,655 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:29:15,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:29:15,655 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:29:15,655 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:29:15,655 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:29:15,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:29:15,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:29:15,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:29:15,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:29:15,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:29:15,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:29:15,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:29:15,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:29:15,657 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:29:15,657 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:29:15,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:29:15,658 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:29:15,658 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:29:15,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:29:15,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:29:15,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:29:16,000 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:29:16,000 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:29:16,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue.i [2023-08-29 19:29:17,135 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:29:17,404 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:29:17,405 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i [2023-08-29 19:29:17,417 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d4aa5434/67ea98c1cd1d4640a431337a7b6a2f64/FLAG8cc5dcf75 [2023-08-29 19:29:17,433 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d4aa5434/67ea98c1cd1d4640a431337a7b6a2f64 [2023-08-29 19:29:17,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:29:17,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:29:17,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:29:17,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:29:17,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:29:17,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:17,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e6de1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17, skipping insertion in model container [2023-08-29 19:29:17,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:17,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:29:17,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:29:17,967 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43284,43297] [2023-08-29 19:29:17,975 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43491,43504] [2023-08-29 19:29:17,980 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43772,43785] [2023-08-29 19:29:17,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:29:18,000 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:29:18,055 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43284,43297] [2023-08-29 19:29:18,056 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43491,43504] [2023-08-29 19:29:18,075 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i[43772,43785] [2023-08-29 19:29:18,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:29:18,160 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:29:18,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18 WrapperNode [2023-08-29 19:29:18,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:29:18,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:29:18,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:29:18,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:29:18,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,248 INFO L138 Inliner]: procedures = 274, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 252 [2023-08-29 19:29:18,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:29:18,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:29:18,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:29:18,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:29:18,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,308 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:29:18,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:29:18,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:29:18,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:29:18,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:29:18,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:29:18,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:29:18,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:29:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:29:18,409 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:29:18,409 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:29:18,409 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:29:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:29:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:29:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:29:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:29:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:29:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:29:18,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:29:18,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:29:18,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:29:18,412 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:29:18,549 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:29:18,566 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:29:19,140 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:29:19,153 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:29:19,154 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:29:19,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:29:19 BoogieIcfgContainer [2023-08-29 19:29:19,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:29:19,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:29:19,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:29:19,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:29:19,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:29:17" (1/3) ... [2023-08-29 19:29:19,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6399508d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:29:19, skipping insertion in model container [2023-08-29 19:29:19,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (2/3) ... [2023-08-29 19:29:19,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6399508d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:29:19, skipping insertion in model container [2023-08-29 19:29:19,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:29:19" (3/3) ... [2023-08-29 19:29:19,164 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-08-29 19:29:19,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:29:19,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-08-29 19:29:19,179 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:29:19,328 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:29:19,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 346 transitions, 708 flow [2023-08-29 19:29:19,475 INFO L130 PetriNetUnfolder]: 15/344 cut-off events. [2023-08-29 19:29:19,476 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:29:19,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 344 events. 15/344 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 763 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 248. Up to 2 conditions per place. [2023-08-29 19:29:19,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 338 places, 346 transitions, 708 flow [2023-08-29 19:29:19,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 340 transitions, 692 flow [2023-08-29 19:29:19,496 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:29:19,505 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 340 transitions, 692 flow [2023-08-29 19:29:19,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 340 transitions, 692 flow [2023-08-29 19:29:19,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 340 transitions, 692 flow [2023-08-29 19:29:19,567 INFO L130 PetriNetUnfolder]: 15/340 cut-off events. [2023-08-29 19:29:19,567 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:29:19,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 340 events. 15/340 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 751 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 248. Up to 2 conditions per place. [2023-08-29 19:29:19,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 28780 [2023-08-29 19:29:33,198 INFO L134 LiptonReduction]: Checked pairs total: 106826 [2023-08-29 19:29:33,199 INFO L136 LiptonReduction]: Total number of compositions: 450 [2023-08-29 19:29:33,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:29:33,215 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;@3aa57358, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:29:33,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-08-29 19:29:33,217 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:29:33,217 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:29:33,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:33,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:29:33,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:33,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:33,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1457, now seen corresponding path program 1 times [2023-08-29 19:29:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:33,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804371648] [2023-08-29 19:29:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:33,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:33,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:33,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804371648] [2023-08-29 19:29:33,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804371648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:33,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:33,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:29:33,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821731793] [2023-08-29 19:29:33,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:33,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:29:33,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:29:33,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:29:33,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 796 [2023-08-29 19:29:33,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 145 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 333.5) internal successors, (667), 2 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:33,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:33,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 796 [2023-08-29 19:29:33,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:34,643 INFO L130 PetriNetUnfolder]: 7683/12375 cut-off events. [2023-08-29 19:29:34,643 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-29 19:29:34,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24099 conditions, 12375 events. 7683/12375 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 73448 event pairs, 6755 based on Foata normal form. 268/6741 useless extension candidates. Maximal degree in co-relation 23685. Up to 11611 conditions per place. [2023-08-29 19:29:34,728 INFO L137 encePairwiseOnDemand]: 747/796 looper letters, 84 selfloop transitions, 0 changer transitions 0/94 dead transitions. [2023-08-29 19:29:34,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 94 transitions, 368 flow [2023-08-29 19:29:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:29:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:29:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 799 transitions. [2023-08-29 19:29:34,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018844221105527 [2023-08-29 19:29:34,742 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 799 transitions. [2023-08-29 19:29:34,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 799 transitions. [2023-08-29 19:29:34,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:34,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 799 transitions. [2023-08-29 19:29:34,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 399.5) internal successors, (799), 2 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:34,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 796.0) internal successors, (2388), 3 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:34,763 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 796.0) internal successors, (2388), 3 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:34,765 INFO L175 Difference]: Start difference. First operand has 141 places, 145 transitions, 302 flow. Second operand 2 states and 799 transitions. [2023-08-29 19:29:34,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 94 transitions, 368 flow [2023-08-29 19:29:34,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 360 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:29:34,774 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 192 flow [2023-08-29 19:29:34,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=192, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2023-08-29 19:29:34,779 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -51 predicate places. [2023-08-29 19:29:34,780 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 192 flow [2023-08-29 19:29:34,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 333.5) internal successors, (667), 2 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:34,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:34,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:34,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:29:34,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:34,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1442672, now seen corresponding path program 1 times [2023-08-29 19:29:34,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:34,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630176460] [2023-08-29 19:29:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:34,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:35,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:35,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630176460] [2023-08-29 19:29:35,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630176460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:35,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:35,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:35,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621933668] [2023-08-29 19:29:35,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:35,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:35,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:35,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 796 [2023-08-29 19:29:35,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:35,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:35,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 796 [2023-08-29 19:29:35,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:36,195 INFO L130 PetriNetUnfolder]: 7613/12235 cut-off events. [2023-08-29 19:29:36,195 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 19:29:36,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23757 conditions, 12235 events. 7613/12235 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 72226 event pairs, 6692 based on Foata normal form. 0/6429 useless extension candidates. Maximal degree in co-relation 23754. Up to 11475 conditions per place. [2023-08-29 19:29:36,262 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 80 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-29 19:29:36,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 92 transitions, 352 flow [2023-08-29 19:29:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1056 transitions. [2023-08-29 19:29:36,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44221105527638194 [2023-08-29 19:29:36,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1056 transitions. [2023-08-29 19:29:36,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1056 transitions. [2023-08-29 19:29:36,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:36,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1056 transitions. [2023-08-29 19:29:36,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:36,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:36,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:36,278 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 192 flow. Second operand 3 states and 1056 transitions. [2023-08-29 19:29:36,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 92 transitions, 352 flow [2023-08-29 19:29:36,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 92 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:29:36,280 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 192 flow [2023-08-29 19:29:36,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2023-08-29 19:29:36,281 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -51 predicate places. [2023-08-29 19:29:36,282 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 192 flow [2023-08-29 19:29:36,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:36,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:36,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:36,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:29:36,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:36,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1442674, now seen corresponding path program 1 times [2023-08-29 19:29:36,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:36,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413906298] [2023-08-29 19:29:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:36,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:36,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:36,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413906298] [2023-08-29 19:29:36,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413906298] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:36,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:36,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:36,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443151814] [2023-08-29 19:29:36,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:36,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:36,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:36,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:36,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:36,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-29 19:29:36,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:36,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:36,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-29 19:29:36,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:37,486 INFO L130 PetriNetUnfolder]: 7543/12095 cut-off events. [2023-08-29 19:29:37,487 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 19:29:37,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23486 conditions, 12095 events. 7543/12095 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 71052 event pairs, 6629 based on Foata normal form. 0/6385 useless extension candidates. Maximal degree in co-relation 23482. Up to 11341 conditions per place. [2023-08-29 19:29:37,561 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 78 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-29 19:29:37,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 348 flow [2023-08-29 19:29:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-29 19:29:37,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463986599664992 [2023-08-29 19:29:37,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-29 19:29:37,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-29 19:29:37,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:37,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-29 19:29:37,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.3333333333333) internal successors, (1066), 3 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:37,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:37,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:37,576 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 192 flow. Second operand 3 states and 1066 transitions. [2023-08-29 19:29:37,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 348 flow [2023-08-29 19:29:37,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:37,580 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 188 flow [2023-08-29 19:29:37,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2023-08-29 19:29:37,582 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-08-29 19:29:37,582 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 188 flow [2023-08-29 19:29:37,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:37,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:37,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:37,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:29:37,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:37,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1442788, now seen corresponding path program 1 times [2023-08-29 19:29:37,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:37,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132980404] [2023-08-29 19:29:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:37,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:37,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:37,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132980404] [2023-08-29 19:29:37,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132980404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:37,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:37,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:37,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787844420] [2023-08-29 19:29:37,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:37,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:37,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:37,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:37,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:37,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 796 [2023-08-29 19:29:37,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 90 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:37,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:37,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 796 [2023-08-29 19:29:37,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:38,693 INFO L130 PetriNetUnfolder]: 6743/10819 cut-off events. [2023-08-29 19:29:38,693 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 19:29:38,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20979 conditions, 10819 events. 6743/10819 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 62403 event pairs, 5881 based on Foata normal form. 0/5965 useless extension candidates. Maximal degree in co-relation 20975. Up to 10113 conditions per place. [2023-08-29 19:29:38,740 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 74 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-29 19:29:38,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 332 flow [2023-08-29 19:29:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:38,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2023-08-29 19:29:38,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4480737018425461 [2023-08-29 19:29:38,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2023-08-29 19:29:38,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2023-08-29 19:29:38,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:38,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2023-08-29 19:29:38,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:38,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:38,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:38,758 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 188 flow. Second operand 3 states and 1070 transitions. [2023-08-29 19:29:38,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 332 flow [2023-08-29 19:29:38,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:38,760 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 180 flow [2023-08-29 19:29:38,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-08-29 19:29:38,761 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-08-29 19:29:38,761 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 180 flow [2023-08-29 19:29:38,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:38,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:38,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:38,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:29:38,763 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:38,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:38,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1442789, now seen corresponding path program 1 times [2023-08-29 19:29:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:38,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277149113] [2023-08-29 19:29:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:38,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:38,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:38,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277149113] [2023-08-29 19:29:38,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277149113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:38,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:38,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:38,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279194636] [2023-08-29 19:29:38,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:38,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:38,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:38,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:39,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 796 [2023-08-29 19:29:39,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:39,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:39,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 796 [2023-08-29 19:29:39,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:39,856 INFO L130 PetriNetUnfolder]: 5985/9609 cut-off events. [2023-08-29 19:29:39,856 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 19:29:39,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18604 conditions, 9609 events. 5985/9609 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 54307 event pairs, 5175 based on Foata normal form. 0/5551 useless extension candidates. Maximal degree in co-relation 18600. Up to 8952 conditions per place. [2023-08-29 19:29:39,905 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 71 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-29 19:29:39,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 316 flow [2023-08-29 19:29:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-29 19:29:39,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463986599664992 [2023-08-29 19:29:39,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-29 19:29:39,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-29 19:29:39,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:39,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-29 19:29:39,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.3333333333333) internal successors, (1066), 3 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:39,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:39,919 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:39,919 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 180 flow. Second operand 3 states and 1066 transitions. [2023-08-29 19:29:39,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 316 flow [2023-08-29 19:29:39,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:39,921 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 170 flow [2023-08-29 19:29:39,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=78, 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=170, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2023-08-29 19:29:39,922 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -61 predicate places. [2023-08-29 19:29:39,922 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 170 flow [2023-08-29 19:29:39,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.0) internal successors, (993), 3 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:39,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:39,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:29:39,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:29:39,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:39,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:39,924 INFO L85 PathProgramCache]: Analyzing trace with hash 44726182, now seen corresponding path program 1 times [2023-08-29 19:29:39,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:39,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413924236] [2023-08-29 19:29:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:39,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:40,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:40,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413924236] [2023-08-29 19:29:40,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413924236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:40,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:40,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045873220] [2023-08-29 19:29:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:40,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:40,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:40,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:40,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 796 [2023-08-29 19:29:40,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:40,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:40,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 796 [2023-08-29 19:29:40,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:41,388 INFO L130 PetriNetUnfolder]: 6294/10012 cut-off events. [2023-08-29 19:29:41,388 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-29 19:29:41,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19484 conditions, 10012 events. 6294/10012 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 55721 event pairs, 5428 based on Foata normal form. 0/5635 useless extension candidates. Maximal degree in co-relation 19480. Up to 9425 conditions per place. [2023-08-29 19:29:41,449 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 74 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2023-08-29 19:29:41,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 88 transitions, 342 flow [2023-08-29 19:29:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:29:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:29:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1333 transitions. [2023-08-29 19:29:41,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41865577889447236 [2023-08-29 19:29:41,453 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1333 transitions. [2023-08-29 19:29:41,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1333 transitions. [2023-08-29 19:29:41,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:41,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1333 transitions. [2023-08-29 19:29:41,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 333.25) internal successors, (1333), 4 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:41,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:41,465 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:41,465 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 170 flow. Second operand 4 states and 1333 transitions. [2023-08-29 19:29:41,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 88 transitions, 342 flow [2023-08-29 19:29:41,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:29:41,468 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 208 flow [2023-08-29 19:29:41,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2023-08-29 19:29:41,471 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-08-29 19:29:41,471 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 208 flow [2023-08-29 19:29:41,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:41,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:41,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:41,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:29:41,473 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:41,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:41,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1386452279, now seen corresponding path program 1 times [2023-08-29 19:29:41,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:41,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541058994] [2023-08-29 19:29:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:41,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:42,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:42,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541058994] [2023-08-29 19:29:42,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541058994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:42,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:42,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:29:42,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840146424] [2023-08-29 19:29:42,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:42,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:29:42,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:29:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:29:44,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 796 [2023-08-29 19:29:44,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:44,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:44,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 796 [2023-08-29 19:29:44,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:46,860 INFO L130 PetriNetUnfolder]: 6831/10811 cut-off events. [2023-08-29 19:29:46,866 INFO L131 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2023-08-29 19:29:46,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21695 conditions, 10811 events. 6831/10811 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 61161 event pairs, 1532 based on Foata normal form. 45/6251 useless extension candidates. Maximal degree in co-relation 21689. Up to 9561 conditions per place. [2023-08-29 19:29:46,912 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 107 selfloop transitions, 14 changer transitions 0/129 dead transitions. [2023-08-29 19:29:46,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 548 flow [2023-08-29 19:29:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:29:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:29:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1363 transitions. [2023-08-29 19:29:46,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280778894472362 [2023-08-29 19:29:46,917 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1363 transitions. [2023-08-29 19:29:46,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1363 transitions. [2023-08-29 19:29:46,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:46,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1363 transitions. [2023-08-29 19:29:46,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 340.75) internal successors, (1363), 4 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:46,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:46,932 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:46,932 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 208 flow. Second operand 4 states and 1363 transitions. [2023-08-29 19:29:46,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 548 flow [2023-08-29 19:29:46,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 548 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:29:46,936 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 293 flow [2023-08-29 19:29:46,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=89, PETRI_TRANSITIONS=96} [2023-08-29 19:29:46,938 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-08-29 19:29:46,938 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 293 flow [2023-08-29 19:29:46,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:46,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:46,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:46,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:29:46,940 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:46,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:46,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1386440554, now seen corresponding path program 1 times [2023-08-29 19:29:46,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:46,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921964521] [2023-08-29 19:29:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:46,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:47,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:47,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921964521] [2023-08-29 19:29:47,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921964521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:47,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:47,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:47,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502181594] [2023-08-29 19:29:47,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:47,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:47,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:47,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-29 19:29:47,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:47,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:47,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-29 19:29:47,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:47,665 INFO L130 PetriNetUnfolder]: 4744/7768 cut-off events. [2023-08-29 19:29:47,665 INFO L131 PetriNetUnfolder]: For 1133/1220 co-relation queries the response was YES. [2023-08-29 19:29:47,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16152 conditions, 7768 events. 4744/7768 cut-off events. For 1133/1220 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 43310 event pairs, 3857 based on Foata normal form. 29/4988 useless extension candidates. Maximal degree in co-relation 16143. Up to 7233 conditions per place. [2023-08-29 19:29:47,720 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 80 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-29 19:29:47,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 455 flow [2023-08-29 19:29:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1056 transitions. [2023-08-29 19:29:47,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44221105527638194 [2023-08-29 19:29:47,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1056 transitions. [2023-08-29 19:29:47,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1056 transitions. [2023-08-29 19:29:47,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:47,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1056 transitions. [2023-08-29 19:29:47,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:47,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:47,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:47,731 INFO L175 Difference]: Start difference. First operand has 89 places, 96 transitions, 293 flow. Second operand 3 states and 1056 transitions. [2023-08-29 19:29:47,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 455 flow [2023-08-29 19:29:47,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 453 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 19:29:47,737 INFO L231 Difference]: Finished difference. Result has 90 places, 95 transitions, 293 flow [2023-08-29 19:29:47,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2023-08-29 19:29:47,739 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -51 predicate places. [2023-08-29 19:29:47,740 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 293 flow [2023-08-29 19:29:47,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:47,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:47,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:47,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:29:47,741 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:47,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1386440553, now seen corresponding path program 1 times [2023-08-29 19:29:47,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:47,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129684849] [2023-08-29 19:29:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:47,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:47,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:47,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129684849] [2023-08-29 19:29:47,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129684849] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:47,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:47,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:47,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208302086] [2023-08-29 19:29:47,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:47,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:47,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:48,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 796 [2023-08-29 19:29:48,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:48,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:48,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 796 [2023-08-29 19:29:48,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:48,476 INFO L130 PetriNetUnfolder]: 2928/4987 cut-off events. [2023-08-29 19:29:48,476 INFO L131 PetriNetUnfolder]: For 701/758 co-relation queries the response was YES. [2023-08-29 19:29:48,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10389 conditions, 4987 events. 2928/4987 cut-off events. For 701/758 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 26937 event pairs, 2320 based on Foata normal form. 19/3674 useless extension candidates. Maximal degree in co-relation 10379. Up to 4625 conditions per place. [2023-08-29 19:29:48,494 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 79 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-29 19:29:48,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 453 flow [2023-08-29 19:29:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-29 19:29:48,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43174204355108875 [2023-08-29 19:29:48,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-29 19:29:48,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-29 19:29:48,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:48,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-29 19:29:48,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:48,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:48,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:48,518 INFO L175 Difference]: Start difference. First operand has 90 places, 95 transitions, 293 flow. Second operand 3 states and 1031 transitions. [2023-08-29 19:29:48,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 453 flow [2023-08-29 19:29:48,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 449 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:48,522 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 291 flow [2023-08-29 19:29:48,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2023-08-29 19:29:48,523 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-08-29 19:29:48,524 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 291 flow [2023-08-29 19:29:48,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:48,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:48,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-29 19:29:48,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:29:48,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:48,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:48,526 INFO L85 PathProgramCache]: Analyzing trace with hash 32222892, now seen corresponding path program 1 times [2023-08-29 19:29:48,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:48,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088020491] [2023-08-29 19:29:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:48,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:48,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:48,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088020491] [2023-08-29 19:29:48,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088020491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:48,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:48,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:29:48,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324677802] [2023-08-29 19:29:48,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:48,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:29:48,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:48,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:29:48,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:29:48,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 796 [2023-08-29 19:29:48,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 94 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 311.2) internal successors, (1556), 5 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:48,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:48,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 796 [2023-08-29 19:29:48,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:49,455 INFO L130 PetriNetUnfolder]: 2651/4507 cut-off events. [2023-08-29 19:29:49,455 INFO L131 PetriNetUnfolder]: For 634/634 co-relation queries the response was YES. [2023-08-29 19:29:49,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9327 conditions, 4507 events. 2651/4507 cut-off events. For 634/634 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 24091 event pairs, 619 based on Foata normal form. 131/3464 useless extension candidates. Maximal degree in co-relation 9317. Up to 3794 conditions per place. [2023-08-29 19:29:49,480 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 123 selfloop transitions, 6 changer transitions 0/142 dead transitions. [2023-08-29 19:29:49,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 142 transitions, 660 flow [2023-08-29 19:29:49,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:29:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:29:49,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1670 transitions. [2023-08-29 19:29:49,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41959798994974873 [2023-08-29 19:29:49,486 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1670 transitions. [2023-08-29 19:29:49,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1670 transitions. [2023-08-29 19:29:49,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:49,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1670 transitions. [2023-08-29 19:29:49,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:49,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 796.0) internal successors, (4776), 6 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:49,496 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 796.0) internal successors, (4776), 6 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:49,496 INFO L175 Difference]: Start difference. First operand has 89 places, 94 transitions, 291 flow. Second operand 5 states and 1670 transitions. [2023-08-29 19:29:49,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 142 transitions, 660 flow [2023-08-29 19:29:49,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 142 transitions, 656 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:49,502 INFO L231 Difference]: Finished difference. Result has 87 places, 87 transitions, 265 flow [2023-08-29 19:29:49,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2023-08-29 19:29:49,503 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -54 predicate places. [2023-08-29 19:29:49,504 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 265 flow [2023-08-29 19:29:49,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 311.2) internal successors, (1556), 5 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:49,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:49,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:49,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:29:49,505 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:49,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1386512729, now seen corresponding path program 2 times [2023-08-29 19:29:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:49,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211742897] [2023-08-29 19:29:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:50,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:50,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211742897] [2023-08-29 19:29:50,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211742897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:50,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:50,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:29:50,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991696349] [2023-08-29 19:29:50,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:50,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:29:50,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:50,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:29:50,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:29:52,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 796 [2023-08-29 19:29:52,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:52,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:52,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 796 [2023-08-29 19:29:52,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:54,052 INFO L130 PetriNetUnfolder]: 2702/4547 cut-off events. [2023-08-29 19:29:54,052 INFO L131 PetriNetUnfolder]: For 1046/1046 co-relation queries the response was YES. [2023-08-29 19:29:54,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9666 conditions, 4547 events. 2702/4547 cut-off events. For 1046/1046 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 23868 event pairs, 687 based on Foata normal form. 23/3394 useless extension candidates. Maximal degree in co-relation 9656. Up to 4014 conditions per place. [2023-08-29 19:29:54,070 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 96 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2023-08-29 19:29:54,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 116 transitions, 549 flow [2023-08-29 19:29:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:29:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:29:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1348 transitions. [2023-08-29 19:29:54,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42336683417085424 [2023-08-29 19:29:54,075 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1348 transitions. [2023-08-29 19:29:54,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1348 transitions. [2023-08-29 19:29:54,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:54,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1348 transitions. [2023-08-29 19:29:54,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,084 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,084 INFO L175 Difference]: Start difference. First operand has 87 places, 87 transitions, 265 flow. Second operand 4 states and 1348 transitions. [2023-08-29 19:29:54,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 116 transitions, 549 flow [2023-08-29 19:29:54,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 116 transitions, 536 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-29 19:29:54,088 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 298 flow [2023-08-29 19:29:54,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=298, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2023-08-29 19:29:54,089 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-08-29 19:29:54,089 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 298 flow [2023-08-29 19:29:54,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 312.0) internal successors, (1560), 5 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:54,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:54,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:29:54,091 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:54,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:54,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1249641130, now seen corresponding path program 1 times [2023-08-29 19:29:54,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:54,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707076496] [2023-08-29 19:29:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:54,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:54,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:54,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707076496] [2023-08-29 19:29:54,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707076496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:54,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:54,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:54,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501605420] [2023-08-29 19:29:54,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:54,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:54,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:54,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-29 19:29:54,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:54,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-29 19:29:54,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:54,510 INFO L130 PetriNetUnfolder]: 1767/3097 cut-off events. [2023-08-29 19:29:54,510 INFO L131 PetriNetUnfolder]: For 264/264 co-relation queries the response was YES. [2023-08-29 19:29:54,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6278 conditions, 3097 events. 1767/3097 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 13959 event pairs, 916 based on Foata normal form. 0/2323 useless extension candidates. Maximal degree in co-relation 6267. Up to 1824 conditions per place. [2023-08-29 19:29:54,526 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 95 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2023-08-29 19:29:54,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 109 transitions, 492 flow [2023-08-29 19:29:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:54,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2023-08-29 19:29:54,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45226130653266333 [2023-08-29 19:29:54,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2023-08-29 19:29:54,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2023-08-29 19:29:54,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:54,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2023-08-29 19:29:54,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.0) internal successors, (1080), 3 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,537 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 298 flow. Second operand 3 states and 1080 transitions. [2023-08-29 19:29:54,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 109 transitions, 492 flow [2023-08-29 19:29:54,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 457 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-29 19:29:54,540 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 213 flow [2023-08-29 19:29:54,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2023-08-29 19:29:54,541 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -58 predicate places. [2023-08-29 19:29:54,541 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 213 flow [2023-08-29 19:29:54,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:54,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:54,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:29:54,543 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:54,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:54,543 INFO L85 PathProgramCache]: Analyzing trace with hash 9126032, now seen corresponding path program 1 times [2023-08-29 19:29:54,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:54,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081716458] [2023-08-29 19:29:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:54,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:54,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:54,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081716458] [2023-08-29 19:29:54,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081716458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:54,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:54,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:54,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979512870] [2023-08-29 19:29:54,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:54,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:54,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:54,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:54,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 796 [2023-08-29 19:29:54,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:54,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 796 [2023-08-29 19:29:54,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:55,086 INFO L130 PetriNetUnfolder]: 1648/2856 cut-off events. [2023-08-29 19:29:55,086 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-29 19:29:55,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5776 conditions, 2856 events. 1648/2856 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12413 event pairs, 1298 based on Foata normal form. 0/2230 useless extension candidates. Maximal degree in co-relation 5768. Up to 2657 conditions per place. [2023-08-29 19:29:55,100 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 64 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-29 19:29:55,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 339 flow [2023-08-29 19:29:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1038 transitions. [2023-08-29 19:29:55,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43467336683417085 [2023-08-29 19:29:55,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1038 transitions. [2023-08-29 19:29:55,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1038 transitions. [2023-08-29 19:29:55,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:55,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1038 transitions. [2023-08-29 19:29:55,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:55,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:55,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:55,110 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 213 flow. Second operand 3 states and 1038 transitions. [2023-08-29 19:29:55,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 339 flow [2023-08-29 19:29:55,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:29:55,113 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 208 flow [2023-08-29 19:29:55,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2023-08-29 19:29:55,114 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -60 predicate places. [2023-08-29 19:29:55,115 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 208 flow [2023-08-29 19:29:55,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:55,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:55,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:55,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:29:55,116 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:55,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:55,116 INFO L85 PathProgramCache]: Analyzing trace with hash 9126033, now seen corresponding path program 1 times [2023-08-29 19:29:55,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:55,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50671423] [2023-08-29 19:29:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:55,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:56,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50671423] [2023-08-29 19:29:56,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50671423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:56,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:56,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:29:56,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800301847] [2023-08-29 19:29:56,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:56,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:29:56,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:56,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:29:56,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:29:58,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 796 [2023-08-29 19:29:58,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 308.6666666666667) internal successors, (1852), 6 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:58,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:58,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 796 [2023-08-29 19:29:58,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:00,480 INFO L130 PetriNetUnfolder]: 1758/3010 cut-off events. [2023-08-29 19:30:00,480 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-29 19:30:00,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6115 conditions, 3010 events. 1758/3010 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12864 event pairs, 1388 based on Foata normal form. 0/2369 useless extension candidates. Maximal degree in co-relation 6107. Up to 2830 conditions per place. [2023-08-29 19:30:00,489 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 68 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2023-08-29 19:30:00,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 394 flow [2023-08-29 19:30:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:30:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:30:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2228 transitions. [2023-08-29 19:30:00,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39985642498205315 [2023-08-29 19:30:00,496 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2228 transitions. [2023-08-29 19:30:00,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2228 transitions. [2023-08-29 19:30:00,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:00,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2228 transitions. [2023-08-29 19:30:00,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 318.2857142857143) internal successors, (2228), 7 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:00,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:00,507 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:00,508 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 208 flow. Second operand 7 states and 2228 transitions. [2023-08-29 19:30:00,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 394 flow [2023-08-29 19:30:00,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:30:00,510 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 267 flow [2023-08-29 19:30:00,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=267, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-08-29 19:30:00,511 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-08-29 19:30:00,511 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 267 flow [2023-08-29 19:30:00,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 308.6666666666667) internal successors, (1852), 6 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:00,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:00,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:00,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:30:00,512 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:00,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:00,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1126027934, now seen corresponding path program 1 times [2023-08-29 19:30:00,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:00,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961507347] [2023-08-29 19:30:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:00,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:01,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:01,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961507347] [2023-08-29 19:30:01,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961507347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:01,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:01,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:30:01,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428164407] [2023-08-29 19:30:01,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:01,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:30:01,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:01,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:30:01,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:30:03,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 796 [2023-08-29 19:30:03,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 304.57142857142856) internal successors, (2132), 7 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:03,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:03,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 796 [2023-08-29 19:30:03,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:05,025 INFO L130 PetriNetUnfolder]: 1838/3137 cut-off events. [2023-08-29 19:30:05,025 INFO L131 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2023-08-29 19:30:05,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6518 conditions, 3137 events. 1838/3137 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 13563 event pairs, 492 based on Foata normal form. 11/2510 useless extension candidates. Maximal degree in co-relation 6507. Up to 2714 conditions per place. [2023-08-29 19:30:05,037 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 101 selfloop transitions, 16 changer transitions 0/125 dead transitions. [2023-08-29 19:30:05,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 595 flow [2023-08-29 19:30:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:30:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:30:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2234 transitions. [2023-08-29 19:30:05,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009332376166547 [2023-08-29 19:30:05,043 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2234 transitions. [2023-08-29 19:30:05,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2234 transitions. [2023-08-29 19:30:05,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:05,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2234 transitions. [2023-08-29 19:30:05,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.14285714285717) internal successors, (2234), 7 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:05,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:05,055 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:05,056 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 267 flow. Second operand 7 states and 2234 transitions. [2023-08-29 19:30:05,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 595 flow [2023-08-29 19:30:05,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 125 transitions, 577 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 19:30:05,059 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 317 flow [2023-08-29 19:30:05,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2023-08-29 19:30:05,060 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -47 predicate places. [2023-08-29 19:30:05,060 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 317 flow [2023-08-29 19:30:05,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 304.57142857142856) internal successors, (2132), 7 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:05,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:05,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:05,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:30:05,061 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:05,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash 286371520, now seen corresponding path program 2 times [2023-08-29 19:30:05,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:05,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313080299] [2023-08-29 19:30:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:05,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:05,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313080299] [2023-08-29 19:30:05,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313080299] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:05,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:05,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:30:05,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578051753] [2023-08-29 19:30:05,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:05,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:30:05,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:05,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:30:05,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:30:05,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 796 [2023-08-29 19:30:05,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 329.5) internal successors, (1318), 4 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:05,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:05,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 796 [2023-08-29 19:30:05,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:05,700 INFO L130 PetriNetUnfolder]: 1702/2948 cut-off events. [2023-08-29 19:30:05,700 INFO L131 PetriNetUnfolder]: For 415/422 co-relation queries the response was YES. [2023-08-29 19:30:05,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6187 conditions, 2948 events. 1702/2948 cut-off events. For 415/422 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12832 event pairs, 1339 based on Foata normal form. 7/2341 useless extension candidates. Maximal degree in co-relation 6173. Up to 2744 conditions per place. [2023-08-29 19:30:05,712 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 72 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-29 19:30:05,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 86 transitions, 463 flow [2023-08-29 19:30:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:30:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:30:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1371 transitions. [2023-08-29 19:30:05,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43059045226130654 [2023-08-29 19:30:05,716 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1371 transitions. [2023-08-29 19:30:05,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1371 transitions. [2023-08-29 19:30:05,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:05,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1371 transitions. [2023-08-29 19:30:05,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.75) internal successors, (1371), 4 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:05,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:05,724 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:05,724 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 317 flow. Second operand 4 states and 1371 transitions. [2023-08-29 19:30:05,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 86 transitions, 463 flow [2023-08-29 19:30:05,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 86 transitions, 437 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-29 19:30:05,728 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 293 flow [2023-08-29 19:30:05,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2023-08-29 19:30:05,728 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -48 predicate places. [2023-08-29 19:30:05,729 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 293 flow [2023-08-29 19:30:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 329.5) internal successors, (1318), 4 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:05,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:05,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:05,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:30:05,730 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:05,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:05,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1084821956, now seen corresponding path program 1 times [2023-08-29 19:30:05,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:05,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701341529] [2023-08-29 19:30:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:05,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:05,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:05,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701341529] [2023-08-29 19:30:05,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701341529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:05,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:05,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-29 19:30:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397001906] [2023-08-29 19:30:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:05,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:30:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:05,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:30:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:30:06,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 796 [2023-08-29 19:30:06,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 324.8333333333333) internal successors, (1949), 6 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:06,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:06,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 796 [2023-08-29 19:30:06,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:06,686 INFO L130 PetriNetUnfolder]: 1690/2953 cut-off events. [2023-08-29 19:30:06,686 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-29 19:30:06,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6120 conditions, 2953 events. 1690/2953 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 13047 event pairs, 456 based on Foata normal form. 0/2361 useless extension candidates. Maximal degree in co-relation 6106. Up to 2282 conditions per place. [2023-08-29 19:30:06,698 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 88 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2023-08-29 19:30:06,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 107 transitions, 530 flow [2023-08-29 19:30:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:30:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:30:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2024 transitions. [2023-08-29 19:30:06,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423785594639866 [2023-08-29 19:30:06,703 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2024 transitions. [2023-08-29 19:30:06,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2024 transitions. [2023-08-29 19:30:06,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:06,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2024 transitions. [2023-08-29 19:30:06,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 337.3333333333333) internal successors, (2024), 6 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:06,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:06,714 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:06,714 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 293 flow. Second operand 6 states and 2024 transitions. [2023-08-29 19:30:06,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 107 transitions, 530 flow [2023-08-29 19:30:06,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 107 transitions, 527 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:30:06,718 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 302 flow [2023-08-29 19:30:06,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2023-08-29 19:30:06,719 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -46 predicate places. [2023-08-29 19:30:06,719 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 302 flow [2023-08-29 19:30:06,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 324.8333333333333) internal successors, (1949), 6 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:06,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:06,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:06,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:30:06,720 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:06,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:06,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1084820515, now seen corresponding path program 1 times [2023-08-29 19:30:06,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:06,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668638659] [2023-08-29 19:30:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:06,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:06,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:06,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668638659] [2023-08-29 19:30:06,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668638659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:06,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:06,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:30:06,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927324110] [2023-08-29 19:30:06,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:06,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:30:06,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:06,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:30:06,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:30:06,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-29 19:30:06,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 331.3333333333333) internal successors, (994), 3 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:06,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:06,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-29 19:30:06,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:07,053 INFO L130 PetriNetUnfolder]: 1673/2907 cut-off events. [2023-08-29 19:30:07,054 INFO L131 PetriNetUnfolder]: For 382/389 co-relation queries the response was YES. [2023-08-29 19:30:07,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6072 conditions, 2907 events. 1673/2907 cut-off events. For 382/389 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 12717 event pairs, 1311 based on Foata normal form. 19/2338 useless extension candidates. Maximal degree in co-relation 6058. Up to 2655 conditions per place. [2023-08-29 19:30:07,070 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 75 selfloop transitions, 5 changer transitions 0/92 dead transitions. [2023-08-29 19:30:07,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 92 transitions, 479 flow [2023-08-29 19:30:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:30:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:30:07,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1053 transitions. [2023-08-29 19:30:07,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44095477386934673 [2023-08-29 19:30:07,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1053 transitions. [2023-08-29 19:30:07,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1053 transitions. [2023-08-29 19:30:07,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:07,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1053 transitions. [2023-08-29 19:30:07,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:07,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:07,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:07,079 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 302 flow. Second operand 3 states and 1053 transitions. [2023-08-29 19:30:07,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 92 transitions, 479 flow [2023-08-29 19:30:07,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 466 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:30:07,082 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 297 flow [2023-08-29 19:30:07,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2023-08-29 19:30:07,083 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -48 predicate places. [2023-08-29 19:30:07,083 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 297 flow [2023-08-29 19:30:07,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.3333333333333) internal successors, (994), 3 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:07,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:07,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:07,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:30:07,084 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:07,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:07,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1163214184, now seen corresponding path program 1 times [2023-08-29 19:30:07,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:07,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830943668] [2023-08-29 19:30:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:07,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:07,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:07,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830943668] [2023-08-29 19:30:07,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830943668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:07,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:07,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:30:07,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598886232] [2023-08-29 19:30:07,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:07,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:30:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:07,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:30:07,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:30:08,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 796 [2023-08-29 19:30:08,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 304.85714285714283) internal successors, (2134), 7 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:08,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:08,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 796 [2023-08-29 19:30:08,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:08,791 INFO L130 PetriNetUnfolder]: 1888/3229 cut-off events. [2023-08-29 19:30:08,791 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2023-08-29 19:30:08,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6831 conditions, 3229 events. 1888/3229 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14042 event pairs, 492 based on Foata normal form. 11/2630 useless extension candidates. Maximal degree in co-relation 6817. Up to 2655 conditions per place. [2023-08-29 19:30:08,803 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 98 selfloop transitions, 19 changer transitions 0/125 dead transitions. [2023-08-29 19:30:08,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 125 transitions, 625 flow [2023-08-29 19:30:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:30:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:30:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2230 transitions. [2023-08-29 19:30:08,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002153625269203 [2023-08-29 19:30:08,808 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2230 transitions. [2023-08-29 19:30:08,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2230 transitions. [2023-08-29 19:30:08,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:08,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2230 transitions. [2023-08-29 19:30:08,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 318.57142857142856) internal successors, (2230), 7 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:08,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:08,820 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 796.0) internal successors, (6368), 8 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:08,821 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 297 flow. Second operand 7 states and 2230 transitions. [2023-08-29 19:30:08,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 125 transitions, 625 flow [2023-08-29 19:30:08,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 125 transitions, 613 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:30:08,826 INFO L231 Difference]: Finished difference. Result has 99 places, 87 transitions, 356 flow [2023-08-29 19:30:08,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=356, PETRI_PLACES=99, PETRI_TRANSITIONS=87} [2023-08-29 19:30:08,826 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -42 predicate places. [2023-08-29 19:30:08,827 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 87 transitions, 356 flow [2023-08-29 19:30:08,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 304.85714285714283) internal successors, (2134), 7 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:08,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:08,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:08,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 19:30:08,828 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:08,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:08,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1612714314, now seen corresponding path program 2 times [2023-08-29 19:30:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:08,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517625231] [2023-08-29 19:30:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:09,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:09,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517625231] [2023-08-29 19:30:09,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517625231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:09,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:09,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:30:09,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004729393] [2023-08-29 19:30:09,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:09,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:30:09,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:30:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:30:09,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 796 [2023-08-29 19:30:09,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 87 transitions, 356 flow. Second operand has 7 states, 7 states have (on average 304.85714285714283) internal successors, (2134), 7 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:09,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:09,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 796 [2023-08-29 19:30:09,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:10,285 INFO L130 PetriNetUnfolder]: 1861/3193 cut-off events. [2023-08-29 19:30:10,285 INFO L131 PetriNetUnfolder]: For 473/473 co-relation queries the response was YES. [2023-08-29 19:30:10,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6885 conditions, 3193 events. 1861/3193 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 13912 event pairs, 499 based on Foata normal form. 11/2596 useless extension candidates. Maximal degree in co-relation 6869. Up to 2477 conditions per place. [2023-08-29 19:30:10,299 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 91 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2023-08-29 19:30:10,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 113 transitions, 618 flow [2023-08-29 19:30:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:30:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:30:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1911 transitions. [2023-08-29 19:30:10,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4001256281407035 [2023-08-29 19:30:10,302 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1911 transitions. [2023-08-29 19:30:10,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1911 transitions. [2023-08-29 19:30:10,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:10,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1911 transitions. [2023-08-29 19:30:10,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 318.5) internal successors, (1911), 6 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:10,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:10,311 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:10,311 INFO L175 Difference]: Start difference. First operand has 99 places, 87 transitions, 356 flow. Second operand 6 states and 1911 transitions. [2023-08-29 19:30:10,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 113 transitions, 618 flow [2023-08-29 19:30:10,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 113 transitions, 604 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-29 19:30:10,316 INFO L231 Difference]: Finished difference. Result has 101 places, 85 transitions, 362 flow [2023-08-29 19:30:10,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=101, PETRI_TRANSITIONS=85} [2023-08-29 19:30:10,317 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -40 predicate places. [2023-08-29 19:30:10,317 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 85 transitions, 362 flow [2023-08-29 19:30:10,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 304.85714285714283) internal successors, (2134), 7 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:10,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:10,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:10,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 19:30:10,318 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:10,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1882925758, now seen corresponding path program 1 times [2023-08-29 19:30:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:10,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566413037] [2023-08-29 19:30:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:10,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:11,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566413037] [2023-08-29 19:30:11,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566413037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:11,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:11,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:30:11,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990610713] [2023-08-29 19:30:11,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:11,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:30:11,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:11,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:30:11,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:30:12,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 796 [2023-08-29 19:30:12,419 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 85 transitions, 362 flow. Second operand has 11 states, 11 states have (on average 292.1818181818182) internal successors, (3214), 11 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:12,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:12,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 796 [2023-08-29 19:30:12,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:13,057 INFO L130 PetriNetUnfolder]: 1860/3208 cut-off events. [2023-08-29 19:30:13,057 INFO L131 PetriNetUnfolder]: For 953/953 co-relation queries the response was YES. [2023-08-29 19:30:13,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6939 conditions, 3208 events. 1860/3208 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14076 event pairs, 1450 based on Foata normal form. 0/2597 useless extension candidates. Maximal degree in co-relation 6923. Up to 3005 conditions per place. [2023-08-29 19:30:13,071 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 77 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2023-08-29 19:30:13,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 104 transitions, 606 flow [2023-08-29 19:30:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:30:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:30:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2999 transitions. [2023-08-29 19:30:13,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37675879396984924 [2023-08-29 19:30:13,074 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2999 transitions. [2023-08-29 19:30:13,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2999 transitions. [2023-08-29 19:30:13,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:13,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2999 transitions. [2023-08-29 19:30:13,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 299.9) internal successors, (2999), 10 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:13,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:13,087 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:13,088 INFO L175 Difference]: Start difference. First operand has 101 places, 85 transitions, 362 flow. Second operand 10 states and 2999 transitions. [2023-08-29 19:30:13,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 104 transitions, 606 flow [2023-08-29 19:30:13,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 104 transitions, 578 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-29 19:30:13,092 INFO L231 Difference]: Finished difference. Result has 109 places, 94 transitions, 432 flow [2023-08-29 19:30:13,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=432, PETRI_PLACES=109, PETRI_TRANSITIONS=94} [2023-08-29 19:30:13,093 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -32 predicate places. [2023-08-29 19:30:13,093 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 94 transitions, 432 flow [2023-08-29 19:30:13,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 292.1818181818182) internal successors, (3214), 11 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:13,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:13,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 19:30:13,095 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:13,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash 977727891, now seen corresponding path program 1 times [2023-08-29 19:30:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864814589] [2023-08-29 19:30:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:13,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:13,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:13,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864814589] [2023-08-29 19:30:13,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864814589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:13,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:13,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 19:30:13,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435609236] [2023-08-29 19:30:13,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:13,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:30:13,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:30:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:30:16,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 796 [2023-08-29 19:30:16,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 94 transitions, 432 flow. Second operand has 12 states, 12 states have (on average 286.1666666666667) internal successors, (3434), 12 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:16,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:16,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 796 [2023-08-29 19:30:16,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:17,173 INFO L130 PetriNetUnfolder]: 2057/3538 cut-off events. [2023-08-29 19:30:17,174 INFO L131 PetriNetUnfolder]: For 540/540 co-relation queries the response was YES. [2023-08-29 19:30:17,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7770 conditions, 3538 events. 2057/3538 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 16001 event pairs, 562 based on Foata normal form. 0/2874 useless extension candidates. Maximal degree in co-relation 7750. Up to 2441 conditions per place. [2023-08-29 19:30:17,191 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 131 selfloop transitions, 27 changer transitions 0/166 dead transitions. [2023-08-29 19:30:17,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 166 transitions, 912 flow [2023-08-29 19:30:17,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:30:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:30:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2991 transitions. [2023-08-29 19:30:17,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757537688442211 [2023-08-29 19:30:17,196 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2991 transitions. [2023-08-29 19:30:17,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2991 transitions. [2023-08-29 19:30:17,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:17,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2991 transitions. [2023-08-29 19:30:17,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 299.1) internal successors, (2991), 10 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:17,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:17,209 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:17,210 INFO L175 Difference]: Start difference. First operand has 109 places, 94 transitions, 432 flow. Second operand 10 states and 2991 transitions. [2023-08-29 19:30:17,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 166 transitions, 912 flow [2023-08-29 19:30:17,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 166 transitions, 882 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-29 19:30:17,216 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 504 flow [2023-08-29 19:30:17,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=504, PETRI_PLACES=116, PETRI_TRANSITIONS=98} [2023-08-29 19:30:17,216 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -25 predicate places. [2023-08-29 19:30:17,217 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 504 flow [2023-08-29 19:30:17,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 286.1666666666667) internal successors, (3434), 12 states have internal predecessors, (3434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:17,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:17,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:17,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 19:30:17,218 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:17,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:17,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1758776753, now seen corresponding path program 2 times [2023-08-29 19:30:17,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:17,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133126861] [2023-08-29 19:30:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:17,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:18,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:18,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133126861] [2023-08-29 19:30:18,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133126861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:18,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:18,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 19:30:18,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473329824] [2023-08-29 19:30:18,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:18,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:30:18,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:18,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:30:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:30:20,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 796 [2023-08-29 19:30:20,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 98 transitions, 504 flow. Second operand has 12 states, 12 states have (on average 288.1666666666667) internal successors, (3458), 12 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:20,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:20,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 796 [2023-08-29 19:30:20,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:21,403 INFO L130 PetriNetUnfolder]: 2121/3662 cut-off events. [2023-08-29 19:30:21,403 INFO L131 PetriNetUnfolder]: For 882/882 co-relation queries the response was YES. [2023-08-29 19:30:21,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8316 conditions, 3662 events. 2121/3662 cut-off events. For 882/882 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 16910 event pairs, 544 based on Foata normal form. 0/2977 useless extension candidates. Maximal degree in co-relation 8293. Up to 2227 conditions per place. [2023-08-29 19:30:21,420 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 128 selfloop transitions, 29 changer transitions 0/164 dead transitions. [2023-08-29 19:30:21,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 164 transitions, 961 flow [2023-08-29 19:30:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:30:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:30:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3006 transitions. [2023-08-29 19:30:21,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37763819095477386 [2023-08-29 19:30:21,423 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3006 transitions. [2023-08-29 19:30:21,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3006 transitions. [2023-08-29 19:30:21,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:21,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3006 transitions. [2023-08-29 19:30:21,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 300.6) internal successors, (3006), 10 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:21,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:21,432 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 796.0) internal successors, (8756), 11 states have internal predecessors, (8756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:21,432 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 504 flow. Second operand 10 states and 3006 transitions. [2023-08-29 19:30:21,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 164 transitions, 961 flow [2023-08-29 19:30:21,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 164 transitions, 918 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-29 19:30:21,440 INFO L231 Difference]: Finished difference. Result has 118 places, 98 transitions, 537 flow [2023-08-29 19:30:21,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=537, PETRI_PLACES=118, PETRI_TRANSITIONS=98} [2023-08-29 19:30:21,441 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -23 predicate places. [2023-08-29 19:30:21,441 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 537 flow [2023-08-29 19:30:21,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 288.1666666666667) internal successors, (3458), 12 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:21,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:21,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:21,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:30:21,442 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:21,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:21,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1993547270, now seen corresponding path program 1 times [2023-08-29 19:30:21,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:21,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039962696] [2023-08-29 19:30:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:21,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:22,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:22,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039962696] [2023-08-29 19:30:22,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039962696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:22,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:22,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 19:30:22,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320208908] [2023-08-29 19:30:22,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:22,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 19:30:22,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:22,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 19:30:22,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-29 19:30:24,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-29 19:30:24,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 98 transitions, 537 flow. Second operand has 13 states, 13 states have (on average 275.3076923076923) internal successors, (3579), 13 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:24,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:24,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-29 19:30:24,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:25,095 INFO L130 PetriNetUnfolder]: 2317/4021 cut-off events. [2023-08-29 19:30:25,095 INFO L131 PetriNetUnfolder]: For 1444/1444 co-relation queries the response was YES. [2023-08-29 19:30:25,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9357 conditions, 4021 events. 2317/4021 cut-off events. For 1444/1444 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 19143 event pairs, 1655 based on Foata normal form. 0/3287 useless extension candidates. Maximal degree in co-relation 9333. Up to 3458 conditions per place. [2023-08-29 19:30:25,115 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 121 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2023-08-29 19:30:25,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 153 transitions, 1001 flow [2023-08-29 19:30:25,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 19:30:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 19:30:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3416 transitions. [2023-08-29 19:30:25,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3576214405360134 [2023-08-29 19:30:25,119 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3416 transitions. [2023-08-29 19:30:25,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3416 transitions. [2023-08-29 19:30:25,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:25,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3416 transitions. [2023-08-29 19:30:25,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 284.6666666666667) internal successors, (3416), 12 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:25,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 796.0) internal successors, (10348), 13 states have internal predecessors, (10348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:25,132 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 796.0) internal successors, (10348), 13 states have internal predecessors, (10348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:25,132 INFO L175 Difference]: Start difference. First operand has 118 places, 98 transitions, 537 flow. Second operand 12 states and 3416 transitions. [2023-08-29 19:30:25,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 153 transitions, 1001 flow [2023-08-29 19:30:25,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 153 transitions, 949 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-29 19:30:25,142 INFO L231 Difference]: Finished difference. Result has 126 places, 105 transitions, 626 flow [2023-08-29 19:30:25,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=626, PETRI_PLACES=126, PETRI_TRANSITIONS=105} [2023-08-29 19:30:25,143 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -15 predicate places. [2023-08-29 19:30:25,143 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 105 transitions, 626 flow [2023-08-29 19:30:25,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 275.3076923076923) internal successors, (3579), 13 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:25,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:25,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:25,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 19:30:25,144 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:25,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1001777143, now seen corresponding path program 1 times [2023-08-29 19:30:25,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:25,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728646909] [2023-08-29 19:30:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:25,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:26,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:26,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728646909] [2023-08-29 19:30:26,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728646909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:26,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:26,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-29 19:30:26,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125654686] [2023-08-29 19:30:26,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:26,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:30:26,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:26,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:30:26,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:30:42,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-29 19:30:42,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 105 transitions, 626 flow. Second operand has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:42,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:42,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-29 19:30:42,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:47,887 INFO L130 PetriNetUnfolder]: 2578/4460 cut-off events. [2023-08-29 19:30:47,887 INFO L131 PetriNetUnfolder]: For 1443/1443 co-relation queries the response was YES. [2023-08-29 19:30:47,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10655 conditions, 4460 events. 2578/4460 cut-off events. For 1443/1443 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 21800 event pairs, 912 based on Foata normal form. 11/3858 useless extension candidates. Maximal degree in co-relation 10626. Up to 3034 conditions per place. [2023-08-29 19:30:47,911 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 155 selfloop transitions, 40 changer transitions 0/202 dead transitions. [2023-08-29 19:30:47,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 1275 flow [2023-08-29 19:30:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 19:30:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 19:30:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3730 transitions. [2023-08-29 19:30:47,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604561267877851 [2023-08-29 19:30:47,916 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3730 transitions. [2023-08-29 19:30:47,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3730 transitions. [2023-08-29 19:30:47,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:47,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3730 transitions. [2023-08-29 19:30:47,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 286.9230769230769) internal successors, (3730), 13 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:47,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 796.0) internal successors, (11144), 14 states have internal predecessors, (11144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:47,930 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 796.0) internal successors, (11144), 14 states have internal predecessors, (11144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:47,930 INFO L175 Difference]: Start difference. First operand has 126 places, 105 transitions, 626 flow. Second operand 13 states and 3730 transitions. [2023-08-29 19:30:47,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 1275 flow [2023-08-29 19:30:47,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 202 transitions, 1240 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-29 19:30:47,944 INFO L231 Difference]: Finished difference. Result has 139 places, 112 transitions, 794 flow [2023-08-29 19:30:47,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=794, PETRI_PLACES=139, PETRI_TRANSITIONS=112} [2023-08-29 19:30:47,945 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -2 predicate places. [2023-08-29 19:30:47,945 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 112 transitions, 794 flow [2023-08-29 19:30:47,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:47,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:47,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:47,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 19:30:47,946 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:47,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1617294419, now seen corresponding path program 2 times [2023-08-29 19:30:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:47,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113215014] [2023-08-29 19:30:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:47,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:49,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:49,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113215014] [2023-08-29 19:30:49,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113215014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:49,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:49,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-29 19:30:49,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208831461] [2023-08-29 19:30:49,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:49,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:30:49,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:49,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:30:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:30:51,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 796 [2023-08-29 19:30:51,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 112 transitions, 794 flow. Second operand has 14 states, 14 states have (on average 273.2857142857143) internal successors, (3826), 14 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:51,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:51,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 796 [2023-08-29 19:30:51,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:52,653 INFO L130 PetriNetUnfolder]: 2562/4435 cut-off events. [2023-08-29 19:30:52,653 INFO L131 PetriNetUnfolder]: For 2762/2762 co-relation queries the response was YES. [2023-08-29 19:30:52,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11233 conditions, 4435 events. 2562/4435 cut-off events. For 2762/2762 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 21667 event pairs, 700 based on Foata normal form. 11/3835 useless extension candidates. Maximal degree in co-relation 11197. Up to 2576 conditions per place. [2023-08-29 19:30:52,681 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 139 selfloop transitions, 40 changer transitions 0/186 dead transitions. [2023-08-29 19:30:52,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 1318 flow [2023-08-29 19:30:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-29 19:30:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-29 19:30:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3139 transitions. [2023-08-29 19:30:52,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35849703060758337 [2023-08-29 19:30:52,686 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3139 transitions. [2023-08-29 19:30:52,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3139 transitions. [2023-08-29 19:30:52,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:52,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3139 transitions. [2023-08-29 19:30:52,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 285.3636363636364) internal successors, (3139), 11 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:52,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 796.0) internal successors, (9552), 12 states have internal predecessors, (9552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:52,696 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 796.0) internal successors, (9552), 12 states have internal predecessors, (9552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:52,696 INFO L175 Difference]: Start difference. First operand has 139 places, 112 transitions, 794 flow. Second operand 11 states and 3139 transitions. [2023-08-29 19:30:52,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 1318 flow [2023-08-29 19:30:52,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 1272 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-29 19:30:52,718 INFO L231 Difference]: Finished difference. Result has 146 places, 113 transitions, 855 flow [2023-08-29 19:30:52,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=855, PETRI_PLACES=146, PETRI_TRANSITIONS=113} [2023-08-29 19:30:52,719 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 5 predicate places. [2023-08-29 19:30:52,719 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 113 transitions, 855 flow [2023-08-29 19:30:52,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 273.2857142857143) internal successors, (3826), 14 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:52,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:52,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:52,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 19:30:52,720 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:52,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:52,721 INFO L85 PathProgramCache]: Analyzing trace with hash 518044755, now seen corresponding path program 3 times [2023-08-29 19:30:52,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:52,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501462038] [2023-08-29 19:30:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:52,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:53,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:53,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501462038] [2023-08-29 19:30:53,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501462038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:53,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:53,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-29 19:30:53,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613563404] [2023-08-29 19:30:53,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:53,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:30:53,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:53,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:30:53,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:30:56,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-29 19:30:56,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 113 transitions, 855 flow. Second operand has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:56,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:56,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-29 19:30:56,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:57,065 INFO L130 PetriNetUnfolder]: 2593/4487 cut-off events. [2023-08-29 19:30:57,066 INFO L131 PetriNetUnfolder]: For 3344/3344 co-relation queries the response was YES. [2023-08-29 19:30:57,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11618 conditions, 4487 events. 2593/4487 cut-off events. For 3344/3344 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 22023 event pairs, 586 based on Foata normal form. 11/3883 useless extension candidates. Maximal degree in co-relation 11580. Up to 2258 conditions per place. [2023-08-29 19:30:57,096 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 145 selfloop transitions, 43 changer transitions 0/195 dead transitions. [2023-08-29 19:30:57,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 195 transitions, 1419 flow [2023-08-29 19:30:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 19:30:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 19:30:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3716 transitions. [2023-08-29 19:30:57,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3591032083494395 [2023-08-29 19:30:57,100 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3716 transitions. [2023-08-29 19:30:57,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3716 transitions. [2023-08-29 19:30:57,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:57,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3716 transitions. [2023-08-29 19:30:57,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 285.84615384615387) internal successors, (3716), 13 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:57,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 796.0) internal successors, (11144), 14 states have internal predecessors, (11144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:57,113 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 796.0) internal successors, (11144), 14 states have internal predecessors, (11144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:57,113 INFO L175 Difference]: Start difference. First operand has 146 places, 113 transitions, 855 flow. Second operand 13 states and 3716 transitions. [2023-08-29 19:30:57,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 195 transitions, 1419 flow [2023-08-29 19:30:57,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 195 transitions, 1340 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-29 19:30:57,136 INFO L231 Difference]: Finished difference. Result has 152 places, 115 transitions, 902 flow [2023-08-29 19:30:57,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=902, PETRI_PLACES=152, PETRI_TRANSITIONS=115} [2023-08-29 19:30:57,137 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 11 predicate places. [2023-08-29 19:30:57,137 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 115 transitions, 902 flow [2023-08-29 19:30:57,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:57,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:57,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:57,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 19:30:57,139 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:57,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1670417789, now seen corresponding path program 4 times [2023-08-29 19:30:57,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:57,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641601279] [2023-08-29 19:30:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:57,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:58,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:58,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641601279] [2023-08-29 19:30:58,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641601279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:58,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:58,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-29 19:30:58,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747147210] [2023-08-29 19:30:58,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:58,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:30:58,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:58,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:30:58,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:31:06,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-29 19:31:06,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 115 transitions, 902 flow. Second operand has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:06,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:06,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-29 19:31:06,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:08,457 INFO L130 PetriNetUnfolder]: 2577/4474 cut-off events. [2023-08-29 19:31:08,457 INFO L131 PetriNetUnfolder]: For 4020/4020 co-relation queries the response was YES. [2023-08-29 19:31:08,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11739 conditions, 4474 events. 2577/4474 cut-off events. For 4020/4020 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 22013 event pairs, 685 based on Foata normal form. 11/3870 useless extension candidates. Maximal degree in co-relation 11699. Up to 2262 conditions per place. [2023-08-29 19:31:08,482 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 141 selfloop transitions, 45 changer transitions 0/193 dead transitions. [2023-08-29 19:31:08,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 193 transitions, 1442 flow [2023-08-29 19:31:08,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-29 19:31:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-29 19:31:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3439 transitions. [2023-08-29 19:31:08,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3600293132328308 [2023-08-29 19:31:08,485 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3439 transitions. [2023-08-29 19:31:08,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3439 transitions. [2023-08-29 19:31:08,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:08,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3439 transitions. [2023-08-29 19:31:08,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 286.5833333333333) internal successors, (3439), 12 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:08,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 796.0) internal successors, (10348), 13 states have internal predecessors, (10348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:08,495 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 796.0) internal successors, (10348), 13 states have internal predecessors, (10348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:08,495 INFO L175 Difference]: Start difference. First operand has 152 places, 115 transitions, 902 flow. Second operand 12 states and 3439 transitions. [2023-08-29 19:31:08,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 193 transitions, 1442 flow [2023-08-29 19:31:08,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 193 transitions, 1347 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-29 19:31:08,514 INFO L231 Difference]: Finished difference. Result has 153 places, 115 transitions, 909 flow [2023-08-29 19:31:08,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=909, PETRI_PLACES=153, PETRI_TRANSITIONS=115} [2023-08-29 19:31:08,515 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 12 predicate places. [2023-08-29 19:31:08,515 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 115 transitions, 909 flow [2023-08-29 19:31:08,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.2857142857143) internal successors, (3854), 14 states have internal predecessors, (3854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:08,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:08,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:08,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 19:31:08,516 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:08,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:08,517 INFO L85 PathProgramCache]: Analyzing trace with hash -816584116, now seen corresponding path program 1 times [2023-08-29 19:31:08,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:08,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912751095] [2023-08-29 19:31:08,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:08,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:08,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:08,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912751095] [2023-08-29 19:31:08,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912751095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:08,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:08,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:31:08,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152308625] [2023-08-29 19:31:08,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:08,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:31:08,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:08,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:31:08,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:31:08,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 796 [2023-08-29 19:31:08,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 115 transitions, 909 flow. Second operand has 4 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:08,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:08,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 796 [2023-08-29 19:31:08,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:09,387 INFO L130 PetriNetUnfolder]: 3075/5387 cut-off events. [2023-08-29 19:31:09,387 INFO L131 PetriNetUnfolder]: For 6047/6081 co-relation queries the response was YES. [2023-08-29 19:31:09,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13994 conditions, 5387 events. 3075/5387 cut-off events. For 6047/6081 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 28537 event pairs, 1496 based on Foata normal form. 34/4731 useless extension candidates. Maximal degree in co-relation 13955. Up to 4087 conditions per place. [2023-08-29 19:31:09,426 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 136 selfloop transitions, 3 changer transitions 0/157 dead transitions. [2023-08-29 19:31:09,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 157 transitions, 1356 flow [2023-08-29 19:31:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:31:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:31:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1392 transitions. [2023-08-29 19:31:09,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371859296482412 [2023-08-29 19:31:09,427 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1392 transitions. [2023-08-29 19:31:09,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1392 transitions. [2023-08-29 19:31:09,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:09,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1392 transitions. [2023-08-29 19:31:09,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:09,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:09,432 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 796.0) internal successors, (3980), 5 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:09,432 INFO L175 Difference]: Start difference. First operand has 153 places, 115 transitions, 909 flow. Second operand 4 states and 1392 transitions. [2023-08-29 19:31:09,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 157 transitions, 1356 flow [2023-08-29 19:31:09,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 157 transitions, 1269 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-29 19:31:09,459 INFO L231 Difference]: Finished difference. Result has 147 places, 116 transitions, 843 flow [2023-08-29 19:31:09,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=843, PETRI_PLACES=147, PETRI_TRANSITIONS=116} [2023-08-29 19:31:09,460 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 6 predicate places. [2023-08-29 19:31:09,460 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 116 transitions, 843 flow [2023-08-29 19:31:09,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:09,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:09,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:09,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 19:31:09,461 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:09,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1801802691, now seen corresponding path program 1 times [2023-08-29 19:31:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:09,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843936320] [2023-08-29 19:31:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:09,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:09,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:09,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843936320] [2023-08-29 19:31:09,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843936320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:09,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:09,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:31:09,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467810427] [2023-08-29 19:31:09,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:09,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:31:09,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:31:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:31:09,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 796 [2023-08-29 19:31:09,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 116 transitions, 843 flow. Second operand has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:09,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:09,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 796 [2023-08-29 19:31:09,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:09,897 INFO L130 PetriNetUnfolder]: 2123/3787 cut-off events. [2023-08-29 19:31:09,897 INFO L131 PetriNetUnfolder]: For 4523/4557 co-relation queries the response was YES. [2023-08-29 19:31:09,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10060 conditions, 3787 events. 2123/3787 cut-off events. For 4523/4557 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 18886 event pairs, 1085 based on Foata normal form. 131/3581 useless extension candidates. Maximal degree in co-relation 10021. Up to 2061 conditions per place. [2023-08-29 19:31:09,920 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 114 selfloop transitions, 3 changer transitions 1/133 dead transitions. [2023-08-29 19:31:09,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 133 transitions, 1136 flow [2023-08-29 19:31:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:31:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:31:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2023-08-29 19:31:09,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426298157453936 [2023-08-29 19:31:09,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2023-08-29 19:31:09,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2023-08-29 19:31:09,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:09,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2023-08-29 19:31:09,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:09,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:09,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:09,924 INFO L175 Difference]: Start difference. First operand has 147 places, 116 transitions, 843 flow. Second operand 3 states and 1057 transitions. [2023-08-29 19:31:09,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 133 transitions, 1136 flow [2023-08-29 19:31:09,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 133 transitions, 1128 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:31:09,939 INFO L231 Difference]: Finished difference. Result has 148 places, 115 transitions, 856 flow [2023-08-29 19:31:09,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=856, PETRI_PLACES=148, PETRI_TRANSITIONS=115} [2023-08-29 19:31:09,939 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 7 predicate places. [2023-08-29 19:31:09,940 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 115 transitions, 856 flow [2023-08-29 19:31:09,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:09,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:09,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:09,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-29 19:31:09,941 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:09,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1071183114, now seen corresponding path program 1 times [2023-08-29 19:31:09,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:09,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464953379] [2023-08-29 19:31:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:09,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:31:10,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:10,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464953379] [2023-08-29 19:31:10,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464953379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:10,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:10,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:31:10,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833382401] [2023-08-29 19:31:10,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:10,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:31:10,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:10,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:31:10,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:31:10,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 796 [2023-08-29 19:31:10,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 115 transitions, 856 flow. Second operand has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:10,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:10,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 796 [2023-08-29 19:31:10,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:10,778 INFO L130 PetriNetUnfolder]: 3219/5893 cut-off events. [2023-08-29 19:31:10,779 INFO L131 PetriNetUnfolder]: For 7428/7506 co-relation queries the response was YES. [2023-08-29 19:31:10,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15456 conditions, 5893 events. 3219/5893 cut-off events. For 7428/7506 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 34669 event pairs, 1547 based on Foata normal form. 76/5587 useless extension candidates. Maximal degree in co-relation 15416. Up to 3462 conditions per place. [2023-08-29 19:31:10,843 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 166 selfloop transitions, 2 changer transitions 0/185 dead transitions. [2023-08-29 19:31:10,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 185 transitions, 1623 flow [2023-08-29 19:31:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:31:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:31:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1092 transitions. [2023-08-29 19:31:10,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457286432160804 [2023-08-29 19:31:10,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1092 transitions. [2023-08-29 19:31:10,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1092 transitions. [2023-08-29 19:31:10,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:10,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1092 transitions. [2023-08-29 19:31:10,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.0) internal successors, (1092), 3 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:10,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:10,849 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:10,850 INFO L175 Difference]: Start difference. First operand has 148 places, 115 transitions, 856 flow. Second operand 3 states and 1092 transitions. [2023-08-29 19:31:10,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 185 transitions, 1623 flow [2023-08-29 19:31:10,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 185 transitions, 1615 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:31:10,875 INFO L231 Difference]: Finished difference. Result has 148 places, 116 transitions, 862 flow [2023-08-29 19:31:10,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=862, PETRI_PLACES=148, PETRI_TRANSITIONS=116} [2023-08-29 19:31:10,876 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 7 predicate places. [2023-08-29 19:31:10,876 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 116 transitions, 862 flow [2023-08-29 19:31:10,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:10,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:10,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:10,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-29 19:31:10,877 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:10,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:10,877 INFO L85 PathProgramCache]: Analyzing trace with hash -139855902, now seen corresponding path program 1 times [2023-08-29 19:31:10,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:10,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3655415] [2023-08-29 19:31:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:10,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:10,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:10,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3655415] [2023-08-29 19:31:10,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3655415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:10,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:10,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:31:10,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197357279] [2023-08-29 19:31:10,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:10,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:31:10,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:10,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:31:10,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:31:11,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 796 [2023-08-29 19:31:11,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 116 transitions, 862 flow. Second operand has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:11,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:11,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 796 [2023-08-29 19:31:11,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:11,544 INFO L130 PetriNetUnfolder]: 2356/4348 cut-off events. [2023-08-29 19:31:11,545 INFO L131 PetriNetUnfolder]: For 4930/4935 co-relation queries the response was YES. [2023-08-29 19:31:11,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12388 conditions, 4348 events. 2356/4348 cut-off events. For 4930/4935 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 22895 event pairs, 635 based on Foata normal form. 407/4630 useless extension candidates. Maximal degree in co-relation 12347. Up to 3026 conditions per place. [2023-08-29 19:31:11,587 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 107 selfloop transitions, 7 changer transitions 0/129 dead transitions. [2023-08-29 19:31:11,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 129 transitions, 1146 flow [2023-08-29 19:31:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:31:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:31:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2023-08-29 19:31:11,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380234505862647 [2023-08-29 19:31:11,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2023-08-29 19:31:11,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2023-08-29 19:31:11,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:11,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2023-08-29 19:31:11,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.6666666666667) internal successors, (1046), 3 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:11,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:11,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 796.0) internal successors, (3184), 4 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:11,594 INFO L175 Difference]: Start difference. First operand has 148 places, 116 transitions, 862 flow. Second operand 3 states and 1046 transitions. [2023-08-29 19:31:11,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 129 transitions, 1146 flow [2023-08-29 19:31:11,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 129 transitions, 1142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:31:11,615 INFO L231 Difference]: Finished difference. Result has 149 places, 116 transitions, 874 flow [2023-08-29 19:31:11,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=874, PETRI_PLACES=149, PETRI_TRANSITIONS=116} [2023-08-29 19:31:11,616 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 8 predicate places. [2023-08-29 19:31:11,616 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 116 transitions, 874 flow [2023-08-29 19:31:11,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:11,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:11,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:11,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-29 19:31:11,617 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:11,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:11,618 INFO L85 PathProgramCache]: Analyzing trace with hash 229051555, now seen corresponding path program 1 times [2023-08-29 19:31:11,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:11,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522061245] [2023-08-29 19:31:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:11,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:31:11,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:11,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522061245] [2023-08-29 19:31:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522061245] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:31:11,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072847649] [2023-08-29 19:31:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:11,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:31:11,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:31:11,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:31:11,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 19:31:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:11,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:31:11,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:31:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:31:11,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:31:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:31:12,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072847649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:31:12,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:31:12,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 19:31:12,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808759647] [2023-08-29 19:31:12,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:31:12,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:31:12,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:31:12,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:31:12,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-29 19:31:12,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 116 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 333.7142857142857) internal successors, (2336), 7 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:12,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:12,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-29 19:31:12,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:13,090 INFO L130 PetriNetUnfolder]: 3674/7206 cut-off events. [2023-08-29 19:31:13,090 INFO L131 PetriNetUnfolder]: For 8832/8888 co-relation queries the response was YES. [2023-08-29 19:31:13,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20185 conditions, 7206 events. 3674/7206 cut-off events. For 8832/8888 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 45890 event pairs, 523 based on Foata normal form. 614/7576 useless extension candidates. Maximal degree in co-relation 20144. Up to 1382 conditions per place. [2023-08-29 19:31:13,140 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 306 selfloop transitions, 6 changer transitions 0/329 dead transitions. [2023-08-29 19:31:13,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 329 transitions, 2744 flow [2023-08-29 19:31:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:31:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:31:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2201 transitions. [2023-08-29 19:31:13,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608458961474037 [2023-08-29 19:31:13,143 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2201 transitions. [2023-08-29 19:31:13,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2201 transitions. [2023-08-29 19:31:13,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:13,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2201 transitions. [2023-08-29 19:31:13,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 366.8333333333333) internal successors, (2201), 6 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:13,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:13,148 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 796.0) internal successors, (5572), 7 states have internal predecessors, (5572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:13,148 INFO L175 Difference]: Start difference. First operand has 149 places, 116 transitions, 874 flow. Second operand 6 states and 2201 transitions. [2023-08-29 19:31:13,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 329 transitions, 2744 flow [2023-08-29 19:31:13,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 329 transitions, 2721 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:31:13,172 INFO L231 Difference]: Finished difference. Result has 157 places, 119 transitions, 908 flow [2023-08-29 19:31:13,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=908, PETRI_PLACES=157, PETRI_TRANSITIONS=119} [2023-08-29 19:31:13,173 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 16 predicate places. [2023-08-29 19:31:13,173 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 119 transitions, 908 flow [2023-08-29 19:31:13,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 333.7142857142857) internal successors, (2336), 7 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:13,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:13,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:13,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 19:31:13,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-29 19:31:13,381 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:13,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:13,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1443675116, now seen corresponding path program 1 times [2023-08-29 19:31:13,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:13,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358552193] [2023-08-29 19:31:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:13,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:15,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:15,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358552193] [2023-08-29 19:31:15,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358552193] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:15,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:15,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-29 19:31:15,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605422161] [2023-08-29 19:31:15,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:15,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 19:31:15,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:15,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 19:31:15,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-29 19:31:26,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 796 [2023-08-29 19:31:26,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 119 transitions, 908 flow. Second operand has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:26,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:26,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 796 [2023-08-29 19:31:26,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:30,260 INFO L130 PetriNetUnfolder]: 4044/7752 cut-off events. [2023-08-29 19:31:30,260 INFO L131 PetriNetUnfolder]: For 14631/14631 co-relation queries the response was YES. [2023-08-29 19:31:30,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24144 conditions, 7752 events. 4044/7752 cut-off events. For 14631/14631 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 47771 event pairs, 2369 based on Foata normal form. 0/7511 useless extension candidates. Maximal degree in co-relation 24099. Up to 4822 conditions per place. [2023-08-29 19:31:30,321 INFO L137 encePairwiseOnDemand]: 778/796 looper letters, 206 selfloop transitions, 50 changer transitions 0/262 dead transitions. [2023-08-29 19:31:30,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 262 transitions, 2275 flow [2023-08-29 19:31:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 19:31:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 19:31:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5004 transitions. [2023-08-29 19:31:30,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697901271061188 [2023-08-29 19:31:30,325 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5004 transitions. [2023-08-29 19:31:30,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5004 transitions. [2023-08-29 19:31:30,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:30,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5004 transitions. [2023-08-29 19:31:30,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 294.3529411764706) internal successors, (5004), 17 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:30,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 796.0) internal successors, (14328), 18 states have internal predecessors, (14328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:30,340 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 796.0) internal successors, (14328), 18 states have internal predecessors, (14328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:30,340 INFO L175 Difference]: Start difference. First operand has 157 places, 119 transitions, 908 flow. Second operand 17 states and 5004 transitions. [2023-08-29 19:31:30,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 262 transitions, 2275 flow [2023-08-29 19:31:30,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 262 transitions, 2161 flow, removed 42 selfloop flow, removed 1 redundant places. [2023-08-29 19:31:30,375 INFO L231 Difference]: Finished difference. Result has 177 places, 132 transitions, 1102 flow [2023-08-29 19:31:30,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1102, PETRI_PLACES=177, PETRI_TRANSITIONS=132} [2023-08-29 19:31:30,375 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 36 predicate places. [2023-08-29 19:31:30,376 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 132 transitions, 1102 flow [2023-08-29 19:31:30,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:30,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:30,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:30,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-29 19:31:30,377 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:30,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:30,378 INFO L85 PathProgramCache]: Analyzing trace with hash 168132684, now seen corresponding path program 2 times [2023-08-29 19:31:30,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:30,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859216608] [2023-08-29 19:31:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:30,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:31,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:31,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859216608] [2023-08-29 19:31:31,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859216608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:31,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:31,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-29 19:31:31,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526013685] [2023-08-29 19:31:31,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:31,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 19:31:31,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:31,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 19:31:31,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-29 19:31:34,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 796 [2023-08-29 19:31:34,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 132 transitions, 1102 flow. Second operand has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:34,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:34,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 796 [2023-08-29 19:31:34,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:35,803 INFO L130 PetriNetUnfolder]: 4130/7939 cut-off events. [2023-08-29 19:31:35,803 INFO L131 PetriNetUnfolder]: For 13855/13855 co-relation queries the response was YES. [2023-08-29 19:31:35,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24918 conditions, 7939 events. 4130/7939 cut-off events. For 13855/13855 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 49210 event pairs, 2153 based on Foata normal form. 23/7762 useless extension candidates. Maximal degree in co-relation 24867. Up to 4018 conditions per place. [2023-08-29 19:31:35,864 INFO L137 encePairwiseOnDemand]: 779/796 looper letters, 194 selfloop transitions, 54 changer transitions 0/254 dead transitions. [2023-08-29 19:31:35,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 254 transitions, 2244 flow [2023-08-29 19:31:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:31:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:31:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4419 transitions. [2023-08-29 19:31:35,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701005025125628 [2023-08-29 19:31:35,868 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4419 transitions. [2023-08-29 19:31:35,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4419 transitions. [2023-08-29 19:31:35,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:35,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4419 transitions. [2023-08-29 19:31:35,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 294.6) internal successors, (4419), 15 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:35,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 796.0) internal successors, (12736), 16 states have internal predecessors, (12736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:35,882 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 796.0) internal successors, (12736), 16 states have internal predecessors, (12736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:35,882 INFO L175 Difference]: Start difference. First operand has 177 places, 132 transitions, 1102 flow. Second operand 15 states and 4419 transitions. [2023-08-29 19:31:35,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 254 transitions, 2244 flow [2023-08-29 19:31:35,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 254 transitions, 2174 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-08-29 19:31:35,930 INFO L231 Difference]: Finished difference. Result has 184 places, 137 transitions, 1198 flow [2023-08-29 19:31:35,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1198, PETRI_PLACES=184, PETRI_TRANSITIONS=137} [2023-08-29 19:31:35,931 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 43 predicate places. [2023-08-29 19:31:35,931 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 137 transitions, 1198 flow [2023-08-29 19:31:35,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:35,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:35,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:35,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-29 19:31:35,932 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:35,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:35,932 INFO L85 PathProgramCache]: Analyzing trace with hash -838975280, now seen corresponding path program 3 times [2023-08-29 19:31:35,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:35,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350676286] [2023-08-29 19:31:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:35,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:37,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:37,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350676286] [2023-08-29 19:31:37,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350676286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:37,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:37,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-29 19:31:37,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439826707] [2023-08-29 19:31:37,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:37,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 19:31:37,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 19:31:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-29 19:31:40,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 796 [2023-08-29 19:31:40,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 137 transitions, 1198 flow. Second operand has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:40,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:40,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 796 [2023-08-29 19:31:40,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:41,839 INFO L130 PetriNetUnfolder]: 4713/9104 cut-off events. [2023-08-29 19:31:41,840 INFO L131 PetriNetUnfolder]: For 16239/16239 co-relation queries the response was YES. [2023-08-29 19:31:41,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28736 conditions, 9104 events. 4713/9104 cut-off events. For 16239/16239 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 58631 event pairs, 1461 based on Foata normal form. 23/8807 useless extension candidates. Maximal degree in co-relation 28681. Up to 3593 conditions per place. [2023-08-29 19:31:41,917 INFO L137 encePairwiseOnDemand]: 775/796 looper letters, 206 selfloop transitions, 65 changer transitions 0/277 dead transitions. [2023-08-29 19:31:41,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 277 transitions, 2458 flow [2023-08-29 19:31:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 19:31:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 19:31:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5004 transitions. [2023-08-29 19:31:41,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697901271061188 [2023-08-29 19:31:41,922 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5004 transitions. [2023-08-29 19:31:41,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5004 transitions. [2023-08-29 19:31:41,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:41,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5004 transitions. [2023-08-29 19:31:41,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 294.3529411764706) internal successors, (5004), 17 states have internal predecessors, (5004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:41,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 796.0) internal successors, (14328), 18 states have internal predecessors, (14328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:41,936 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 796.0) internal successors, (14328), 18 states have internal predecessors, (14328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:41,936 INFO L175 Difference]: Start difference. First operand has 184 places, 137 transitions, 1198 flow. Second operand 17 states and 5004 transitions. [2023-08-29 19:31:41,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 277 transitions, 2458 flow [2023-08-29 19:31:42,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 277 transitions, 2347 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-29 19:31:42,003 INFO L231 Difference]: Finished difference. Result has 193 places, 146 transitions, 1344 flow [2023-08-29 19:31:42,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1344, PETRI_PLACES=193, PETRI_TRANSITIONS=146} [2023-08-29 19:31:42,003 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 52 predicate places. [2023-08-29 19:31:42,003 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 146 transitions, 1344 flow [2023-08-29 19:31:42,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 285.70588235294116) internal successors, (4857), 17 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:42,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:42,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:42,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-29 19:31:42,004 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:42,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1101537724, now seen corresponding path program 4 times [2023-08-29 19:31:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:42,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144784444] [2023-08-29 19:31:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:42,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:42,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144784444] [2023-08-29 19:31:42,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144784444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:42,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:42,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-29 19:31:42,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146859035] [2023-08-29 19:31:42,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:42,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-29 19:31:42,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-29 19:31:42,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-29 19:31:45,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 796 [2023-08-29 19:31:45,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 146 transitions, 1344 flow. Second operand has 17 states, 17 states have (on average 281.70588235294116) internal successors, (4789), 17 states have internal predecessors, (4789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:45,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:45,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 796 [2023-08-29 19:31:45,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:46,897 INFO L130 PetriNetUnfolder]: 4092/7965 cut-off events. [2023-08-29 19:31:46,897 INFO L131 PetriNetUnfolder]: For 17762/17762 co-relation queries the response was YES. [2023-08-29 19:31:46,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26794 conditions, 7965 events. 4092/7965 cut-off events. For 17762/17762 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 49798 event pairs, 1162 based on Foata normal form. 10/7815 useless extension candidates. Maximal degree in co-relation 26736. Up to 2947 conditions per place. [2023-08-29 19:31:46,972 INFO L137 encePairwiseOnDemand]: 779/796 looper letters, 195 selfloop transitions, 60 changer transitions 0/261 dead transitions. [2023-08-29 19:31:46,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 261 transitions, 2476 flow [2023-08-29 19:31:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:31:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:31:46,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4071 transitions. [2023-08-29 19:31:46,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36530868628858576 [2023-08-29 19:31:46,975 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4071 transitions. [2023-08-29 19:31:46,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4071 transitions. [2023-08-29 19:31:46,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:46,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4071 transitions. [2023-08-29 19:31:46,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 290.7857142857143) internal successors, (4071), 14 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:46,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:46,988 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:46,988 INFO L175 Difference]: Start difference. First operand has 193 places, 146 transitions, 1344 flow. Second operand 14 states and 4071 transitions. [2023-08-29 19:31:46,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 261 transitions, 2476 flow [2023-08-29 19:31:47,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 261 transitions, 2400 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-08-29 19:31:47,057 INFO L231 Difference]: Finished difference. Result has 199 places, 149 transitions, 1462 flow [2023-08-29 19:31:47,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1462, PETRI_PLACES=199, PETRI_TRANSITIONS=149} [2023-08-29 19:31:47,058 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 58 predicate places. [2023-08-29 19:31:47,058 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 149 transitions, 1462 flow [2023-08-29 19:31:47,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 281.70588235294116) internal successors, (4789), 17 states have internal predecessors, (4789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:47,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:47,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:47,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-29 19:31:47,059 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:47,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:47,059 INFO L85 PathProgramCache]: Analyzing trace with hash -567327663, now seen corresponding path program 1 times [2023-08-29 19:31:47,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:47,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870883404] [2023-08-29 19:31:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:47,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:49,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:49,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870883404] [2023-08-29 19:31:49,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870883404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:49,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:49,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-08-29 19:31:49,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093565236] [2023-08-29 19:31:49,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:49,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-29 19:31:49,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:49,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-29 19:31:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-08-29 19:31:54,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 796 [2023-08-29 19:31:54,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 149 transitions, 1462 flow. Second operand has 20 states, 20 states have (on average 266.5) internal successors, (5330), 20 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:54,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:54,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 796 [2023-08-29 19:31:54,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:57,259 INFO L130 PetriNetUnfolder]: 4969/9549 cut-off events. [2023-08-29 19:31:57,259 INFO L131 PetriNetUnfolder]: For 25836/25836 co-relation queries the response was YES. [2023-08-29 19:31:57,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32577 conditions, 9549 events. 4969/9549 cut-off events. For 25836/25836 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 61823 event pairs, 2512 based on Foata normal form. 0/9269 useless extension candidates. Maximal degree in co-relation 32515. Up to 6171 conditions per place. [2023-08-29 19:31:57,324 INFO L137 encePairwiseOnDemand]: 779/796 looper letters, 238 selfloop transitions, 45 changer transitions 0/289 dead transitions. [2023-08-29 19:31:57,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 289 transitions, 2816 flow [2023-08-29 19:31:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:31:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:31:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3886 transitions. [2023-08-29 19:31:57,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3487078248384781 [2023-08-29 19:31:57,329 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3886 transitions. [2023-08-29 19:31:57,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3886 transitions. [2023-08-29 19:31:57,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:57,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3886 transitions. [2023-08-29 19:31:57,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 277.57142857142856) internal successors, (3886), 14 states have internal predecessors, (3886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:57,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:57,340 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:57,340 INFO L175 Difference]: Start difference. First operand has 199 places, 149 transitions, 1462 flow. Second operand 14 states and 3886 transitions. [2023-08-29 19:31:57,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 289 transitions, 2816 flow [2023-08-29 19:31:57,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 289 transitions, 2719 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-29 19:31:57,437 INFO L231 Difference]: Finished difference. Result has 207 places, 155 transitions, 1564 flow [2023-08-29 19:31:57,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1564, PETRI_PLACES=207, PETRI_TRANSITIONS=155} [2023-08-29 19:31:57,438 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 66 predicate places. [2023-08-29 19:31:57,438 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 155 transitions, 1564 flow [2023-08-29 19:31:57,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 266.5) internal successors, (5330), 20 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:31:57,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:57,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:57,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-29 19:31:57,440 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:57,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:57,440 INFO L85 PathProgramCache]: Analyzing trace with hash -557461965, now seen corresponding path program 2 times [2023-08-29 19:31:57,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:57,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164830488] [2023-08-29 19:31:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:57,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:59,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:59,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164830488] [2023-08-29 19:31:59,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164830488] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:59,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:59,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-29 19:31:59,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594179807] [2023-08-29 19:31:59,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:59,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-29 19:31:59,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:59,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-29 19:31:59,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-08-29 19:32:04,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 796 [2023-08-29 19:32:04,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 155 transitions, 1564 flow. Second operand has 18 states, 18 states have (on average 278.6666666666667) internal successors, (5016), 18 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:32:04,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:32:04,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 796 [2023-08-29 19:32:04,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:32:06,833 INFO L130 PetriNetUnfolder]: 5523/10649 cut-off events. [2023-08-29 19:32:06,833 INFO L131 PetriNetUnfolder]: For 26319/26319 co-relation queries the response was YES. [2023-08-29 19:32:06,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35683 conditions, 10649 events. 5523/10649 cut-off events. For 26319/26319 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 71019 event pairs, 2002 based on Foata normal form. 40/10489 useless extension candidates. Maximal degree in co-relation 35616. Up to 4128 conditions per place. [2023-08-29 19:32:06,967 INFO L137 encePairwiseOnDemand]: 780/796 looper letters, 225 selfloop transitions, 56 changer transitions 0/287 dead transitions. [2023-08-29 19:32:06,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 287 transitions, 2790 flow [2023-08-29 19:32:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:32:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:32:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4049 transitions. [2023-08-29 19:32:06,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36333452979181624 [2023-08-29 19:32:06,970 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4049 transitions. [2023-08-29 19:32:06,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4049 transitions. [2023-08-29 19:32:06,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:32:06,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4049 transitions. [2023-08-29 19:32:06,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 289.2142857142857) internal successors, (4049), 14 states have internal predecessors, (4049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:32:06,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:32:06,981 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 796.0) internal successors, (11940), 15 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:32:06,981 INFO L175 Difference]: Start difference. First operand has 207 places, 155 transitions, 1564 flow. Second operand 14 states and 4049 transitions. [2023-08-29 19:32:06,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 287 transitions, 2790 flow [2023-08-29 19:32:07,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 287 transitions, 2722 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-29 19:32:07,077 INFO L231 Difference]: Finished difference. Result has 214 places, 157 transitions, 1634 flow [2023-08-29 19:32:07,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=796, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1634, PETRI_PLACES=214, PETRI_TRANSITIONS=157} [2023-08-29 19:32:07,078 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 73 predicate places. [2023-08-29 19:32:07,078 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 157 transitions, 1634 flow [2023-08-29 19:32:07,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 278.6666666666667) internal successors, (5016), 18 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:32:07,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:32:07,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:32:07,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-29 19:32:07,079 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:32:07,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:32:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash -730517279, now seen corresponding path program 3 times [2023-08-29 19:32:07,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:32:07,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424281782] [2023-08-29 19:32:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:32:07,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:32:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15