./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 TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/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 TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 02:06:16,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:06:16,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:06:16,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:06:16,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:06:16,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:06:16,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:06:16,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:06:16,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:06:16,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:06:16,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:06:16,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:06:16,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:06:16,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:06:16,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:06:16,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:06:16,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:06:16,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:06:16,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:06:16,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:06:16,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:06:16,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:06:16,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:06:16,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:06:16,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:06:16,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:06:16,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:06:16,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:06:16,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:06:16,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:06:16,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:06:16,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:06:16,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:06:16,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:06:16,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:06:16,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:06:16,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:06:16,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:06:16,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:06:16,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:06:16,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:06:16,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:06:16,970 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:06:16,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:06:16,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:06:16,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:06:16,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:06:16,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:06:16,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:06:16,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:06:16,974 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:06:16,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:06:16,975 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:06:16,975 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:06:16,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:06:16,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:06:16,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:06:16,975 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:06:16,976 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:06:16,976 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:06:16,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:06:16,976 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:06:16,976 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:06:16,976 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:06:16,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:06:16,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:06:16,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:06:16,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:06:16,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:06:16,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:06:16,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:06:16,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:06:16,978 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:06:16,978 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:06:16,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:06:16,979 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:06:16,979 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:06:17,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:06:17,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:06:17,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:06:17,308 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:06:17,308 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:06:17,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue.i [2023-08-30 02:06:18,603 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:06:18,850 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:06:18,851 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i [2023-08-30 02:06:18,868 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a74c2b498/60e6c0666a434c7a9111c4251b214e96/FLAG330b35769 [2023-08-30 02:06:18,880 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a74c2b498/60e6c0666a434c7a9111c4251b214e96 [2023-08-30 02:06:18,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:06:18,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:06:18,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:06:18,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:06:18,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:06:18,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:06:18" (1/1) ... [2023-08-30 02:06:18,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@399b5240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:18, skipping insertion in model container [2023-08-30 02:06:18,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:06:18" (1/1) ... [2023-08-30 02:06:18,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:06:18,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:06:19,300 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] [2023-08-30 02:06:19,308 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] [2023-08-30 02:06:19,317 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] [2023-08-30 02:06:19,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:06:19,336 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:06:19,370 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] [2023-08-30 02:06:19,372 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] [2023-08-30 02:06:19,374 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] [2023-08-30 02:06:19,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:06:19,445 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:06:19,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19 WrapperNode [2023-08-30 02:06:19,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:06:19,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:06:19,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:06:19,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:06:19,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,496 INFO L138 Inliner]: procedures = 274, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 252 [2023-08-30 02:06:19,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:06:19,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:06:19,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:06:19,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:06:19,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,531 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:06:19,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:06:19,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:06:19,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:06:19,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (1/1) ... [2023-08-30 02:06:19,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:06:19,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:06:19,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 02:06:19,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 02:06:19,610 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 02:06:19,610 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 02:06:19,611 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 02:06:19,611 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 02:06:19,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:06:19,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:06:19,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 02:06:19,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:06:19,612 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 02:06:19,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:06:19,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:06:19,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:06:19,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:06:19,614 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 02:06:19,747 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:06:19,749 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:06:20,396 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:06:20,405 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:06:20,405 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 02:06:20,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:06:20 BoogieIcfgContainer [2023-08-30 02:06:20,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:06:20,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:06:20,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:06:20,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:06:20,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:06:18" (1/3) ... [2023-08-30 02:06:20,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4210a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:06:20, skipping insertion in model container [2023-08-30 02:06:20,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19" (2/3) ... [2023-08-30 02:06:20,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4210a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 02:06:20, skipping insertion in model container [2023-08-30 02:06:20,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:06:20" (3/3) ... [2023-08-30 02:06:20,416 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-08-30 02:06:20,431 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:06:20,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-08-30 02:06:20,432 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:06:20,589 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 02:06:20,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 338 places, 346 transitions, 708 flow [2023-08-30 02:06:20,777 INFO L130 PetriNetUnfolder]: 15/344 cut-off events. [2023-08-30 02:06:20,777 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:06:20,790 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. [2023-08-30 02:06:20,790 INFO L82 GeneralOperation]: Start removeDead. Operand has 338 places, 346 transitions, 708 flow [2023-08-30 02:06:20,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 340 transitions, 692 flow [2023-08-30 02:06:20,812 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:06:20,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 340 transitions, 692 flow [2023-08-30 02:06:20,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 340 transitions, 692 flow [2023-08-30 02:06:20,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 340 transitions, 692 flow [2023-08-30 02:06:20,908 INFO L130 PetriNetUnfolder]: 15/340 cut-off events. [2023-08-30 02:06:20,908 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:06:20,912 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. [2023-08-30 02:06:20,925 INFO L119 LiptonReduction]: Number of co-enabled transitions 28780 [2023-08-30 02:06:34,557 INFO L134 LiptonReduction]: Checked pairs total: 106826 [2023-08-30 02:06:34,559 INFO L136 LiptonReduction]: Total number of compositions: 450 [2023-08-30 02:06:34,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:06:34,582 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;@6a9cc2f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:06:34,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-08-30 02:06:34,584 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:06:34,584 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:06:34,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:34,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:06:34,585 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)] === [2023-08-30 02:06:34,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1457, now seen corresponding path program 1 times [2023-08-30 02:06:34,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:34,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628290848] [2023-08-30 02:06:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:34,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:34,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:34,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628290848] [2023-08-30 02:06:34,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628290848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:34,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:34,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:06:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990509066] [2023-08-30 02:06:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:34,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:06:34,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:06:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:06:34,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 796 [2023-08-30 02:06:34,750 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) [2023-08-30 02:06:34,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:34,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 796 [2023-08-30 02:06:34,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:35,926 INFO L130 PetriNetUnfolder]: 7683/12375 cut-off events. [2023-08-30 02:06:35,926 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-08-30 02:06:35,939 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. [2023-08-30 02:06:36,007 INFO L137 encePairwiseOnDemand]: 747/796 looper letters, 84 selfloop transitions, 0 changer transitions 0/94 dead transitions. [2023-08-30 02:06:36,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 94 transitions, 368 flow [2023-08-30 02:06:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:06:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:06:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 799 transitions. [2023-08-30 02:06:36,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018844221105527 [2023-08-30 02:06:36,023 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 799 transitions. [2023-08-30 02:06:36,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 799 transitions. [2023-08-30 02:06:36,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:36,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 799 transitions. [2023-08-30 02:06:36,033 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) [2023-08-30 02:06:36,041 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) [2023-08-30 02:06:36,043 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) [2023-08-30 02:06:36,044 INFO L175 Difference]: Start difference. First operand has 141 places, 145 transitions, 302 flow. Second operand 2 states and 799 transitions. [2023-08-30 02:06:36,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 94 transitions, 368 flow [2023-08-30 02:06:36,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 360 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:06:36,051 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 192 flow [2023-08-30 02:06:36,053 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} [2023-08-30 02:06:36,056 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -51 predicate places. [2023-08-30 02:06:36,056 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 192 flow [2023-08-30 02:06:36,057 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) [2023-08-30 02:06:36,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:36,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:36,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:06:36,058 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)] === [2023-08-30 02:06:36,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1442672, now seen corresponding path program 1 times [2023-08-30 02:06:36,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:36,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777587356] [2023-08-30 02:06:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:36,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:36,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:36,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777587356] [2023-08-30 02:06:36,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777587356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:36,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:36,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:36,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808504969] [2023-08-30 02:06:36,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:36,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:36,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:36,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:36,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:36,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 796 [2023-08-30 02:06:36,570 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) [2023-08-30 02:06:36,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:36,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 796 [2023-08-30 02:06:36,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:37,804 INFO L130 PetriNetUnfolder]: 7613/12235 cut-off events. [2023-08-30 02:06:37,805 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 02:06:37,814 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. [2023-08-30 02:06:37,856 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 80 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-30 02:06:37,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 92 transitions, 352 flow [2023-08-30 02:06:37,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1056 transitions. [2023-08-30 02:06:37,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44221105527638194 [2023-08-30 02:06:37,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1056 transitions. [2023-08-30 02:06:37,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1056 transitions. [2023-08-30 02:06:37,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:37,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1056 transitions. [2023-08-30 02:06:37,864 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) [2023-08-30 02:06:37,869 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) [2023-08-30 02:06:37,871 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) [2023-08-30 02:06:37,871 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 192 flow. Second operand 3 states and 1056 transitions. [2023-08-30 02:06:37,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 92 transitions, 352 flow [2023-08-30 02:06:37,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 92 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:06:37,873 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 192 flow [2023-08-30 02:06:37,874 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} [2023-08-30 02:06:37,874 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -51 predicate places. [2023-08-30 02:06:37,875 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 192 flow [2023-08-30 02:06:37,875 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) [2023-08-30 02:06:37,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:37,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:37,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:06:37,876 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)] === [2023-08-30 02:06:37,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1442674, now seen corresponding path program 1 times [2023-08-30 02:06:37,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:37,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378414605] [2023-08-30 02:06:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:37,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:37,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:37,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378414605] [2023-08-30 02:06:37,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378414605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:37,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:37,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:37,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781342316] [2023-08-30 02:06:37,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:37,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:37,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:37,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:37,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:38,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-30 02:06:38,126 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) [2023-08-30 02:06:38,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:38,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-30 02:06:38,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:39,029 INFO L130 PetriNetUnfolder]: 7543/12095 cut-off events. [2023-08-30 02:06:39,030 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 02:06:39,048 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. [2023-08-30 02:06:39,101 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 78 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-30 02:06:39,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 348 flow [2023-08-30 02:06:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-30 02:06:39,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463986599664992 [2023-08-30 02:06:39,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-30 02:06:39,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-30 02:06:39,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:39,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-30 02:06:39,109 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) [2023-08-30 02:06:39,114 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) [2023-08-30 02:06:39,115 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) [2023-08-30 02:06:39,115 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 192 flow. Second operand 3 states and 1066 transitions. [2023-08-30 02:06:39,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 348 flow [2023-08-30 02:06:39,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:39,120 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 188 flow [2023-08-30 02:06:39,120 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} [2023-08-30 02:06:39,121 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-08-30 02:06:39,122 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 188 flow [2023-08-30 02:06:39,122 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) [2023-08-30 02:06:39,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:39,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:39,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:06:39,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:39,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:39,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1442788, now seen corresponding path program 1 times [2023-08-30 02:06:39,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:39,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164561543] [2023-08-30 02:06:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:39,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:39,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:39,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164561543] [2023-08-30 02:06:39,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164561543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:39,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:39,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:39,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632628394] [2023-08-30 02:06:39,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:39,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:39,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:39,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:39,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:39,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 796 [2023-08-30 02:06:39,392 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) [2023-08-30 02:06:39,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:39,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 796 [2023-08-30 02:06:39,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:40,283 INFO L130 PetriNetUnfolder]: 6743/10819 cut-off events. [2023-08-30 02:06:40,283 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 02:06:40,308 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. [2023-08-30 02:06:40,359 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 74 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-30 02:06:40,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 332 flow [2023-08-30 02:06:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2023-08-30 02:06:40,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4480737018425461 [2023-08-30 02:06:40,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2023-08-30 02:06:40,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2023-08-30 02:06:40,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:40,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2023-08-30 02:06:40,367 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) [2023-08-30 02:06:40,372 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) [2023-08-30 02:06:40,374 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) [2023-08-30 02:06:40,374 INFO L175 Difference]: Start difference. First operand has 88 places, 90 transitions, 188 flow. Second operand 3 states and 1070 transitions. [2023-08-30 02:06:40,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 332 flow [2023-08-30 02:06:40,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:40,377 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 180 flow [2023-08-30 02:06:40,377 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} [2023-08-30 02:06:40,378 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-08-30 02:06:40,378 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 180 flow [2023-08-30 02:06:40,379 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) [2023-08-30 02:06:40,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:40,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:40,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:06:40,379 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:40,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1442789, now seen corresponding path program 1 times [2023-08-30 02:06:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:40,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544723002] [2023-08-30 02:06:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:40,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:40,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544723002] [2023-08-30 02:06:40,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544723002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:40,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:40,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:40,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207659664] [2023-08-30 02:06:40,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:40,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:40,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:40,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:40,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:40,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 796 [2023-08-30 02:06:40,652 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) [2023-08-30 02:06:40,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:40,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 796 [2023-08-30 02:06:40,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:41,358 INFO L130 PetriNetUnfolder]: 5985/9609 cut-off events. [2023-08-30 02:06:41,358 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 02:06:41,368 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. [2023-08-30 02:06:41,400 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 71 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2023-08-30 02:06:41,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 316 flow [2023-08-30 02:06:41,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-30 02:06:41,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463986599664992 [2023-08-30 02:06:41,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-30 02:06:41,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-30 02:06:41,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:41,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-30 02:06:41,407 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) [2023-08-30 02:06:41,412 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) [2023-08-30 02:06:41,413 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) [2023-08-30 02:06:41,413 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 180 flow. Second operand 3 states and 1066 transitions. [2023-08-30 02:06:41,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 316 flow [2023-08-30 02:06:41,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:41,415 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 170 flow [2023-08-30 02:06:41,416 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} [2023-08-30 02:06:41,416 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -61 predicate places. [2023-08-30 02:06:41,417 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 170 flow [2023-08-30 02:06:41,417 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) [2023-08-30 02:06:41,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:41,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:06:41,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:06:41,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:41,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:41,419 INFO L85 PathProgramCache]: Analyzing trace with hash 44726182, now seen corresponding path program 1 times [2023-08-30 02:06:41,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:41,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029414343] [2023-08-30 02:06:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:41,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:41,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:41,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029414343] [2023-08-30 02:06:41,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029414343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:41,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:41,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:41,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131171847] [2023-08-30 02:06:41,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:41,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:41,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:41,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:42,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 796 [2023-08-30 02:06:42,122 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) [2023-08-30 02:06:42,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:42,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 796 [2023-08-30 02:06:42,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:42,725 INFO L130 PetriNetUnfolder]: 6294/10012 cut-off events. [2023-08-30 02:06:42,725 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-30 02:06:42,744 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. [2023-08-30 02:06:42,785 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 74 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2023-08-30 02:06:42,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 88 transitions, 342 flow [2023-08-30 02:06:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:06:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:06:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1333 transitions. [2023-08-30 02:06:42,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41865577889447236 [2023-08-30 02:06:42,790 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1333 transitions. [2023-08-30 02:06:42,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1333 transitions. [2023-08-30 02:06:42,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:42,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1333 transitions. [2023-08-30 02:06:42,794 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) [2023-08-30 02:06:42,799 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) [2023-08-30 02:06:42,800 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) [2023-08-30 02:06:42,801 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 170 flow. Second operand 4 states and 1333 transitions. [2023-08-30 02:06:42,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 88 transitions, 342 flow [2023-08-30 02:06:42,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:06:42,803 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 208 flow [2023-08-30 02:06:42,803 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} [2023-08-30 02:06:42,804 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-08-30 02:06:42,804 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 208 flow [2023-08-30 02:06:42,805 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) [2023-08-30 02:06:42,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:42,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:42,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:06:42,806 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:42,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1386452279, now seen corresponding path program 1 times [2023-08-30 02:06:42,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:42,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71085464] [2023-08-30 02:06:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:42,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:43,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:43,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71085464] [2023-08-30 02:06:43,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71085464] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:43,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:43,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:06:43,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562550451] [2023-08-30 02:06:43,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:43,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:06:43,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:06:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:06:46,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 796 [2023-08-30 02:06:46,443 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) [2023-08-30 02:06:46,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:46,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 796 [2023-08-30 02:06:46,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:48,449 INFO L130 PetriNetUnfolder]: 6831/10811 cut-off events. [2023-08-30 02:06:48,449 INFO L131 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2023-08-30 02:06:48,478 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. [2023-08-30 02:06:48,520 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 107 selfloop transitions, 14 changer transitions 0/129 dead transitions. [2023-08-30 02:06:48,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 548 flow [2023-08-30 02:06:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:06:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:06:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1363 transitions. [2023-08-30 02:06:48,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280778894472362 [2023-08-30 02:06:48,526 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1363 transitions. [2023-08-30 02:06:48,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1363 transitions. [2023-08-30 02:06:48,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:48,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1363 transitions. [2023-08-30 02:06:48,530 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) [2023-08-30 02:06:48,534 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) [2023-08-30 02:06:48,535 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) [2023-08-30 02:06:48,535 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 208 flow. Second operand 4 states and 1363 transitions. [2023-08-30 02:06:48,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 548 flow [2023-08-30 02:06:48,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 548 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:06:48,539 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 293 flow [2023-08-30 02:06:48,540 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} [2023-08-30 02:06:48,540 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-08-30 02:06:48,540 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 293 flow [2023-08-30 02:06:48,541 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) [2023-08-30 02:06:48,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:48,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:48,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:06:48,542 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)] === [2023-08-30 02:06:48,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1386440554, now seen corresponding path program 1 times [2023-08-30 02:06:48,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:48,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610519527] [2023-08-30 02:06:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:48,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:48,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:48,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610519527] [2023-08-30 02:06:48,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610519527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:48,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:48,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:48,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049549038] [2023-08-30 02:06:48,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:48,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:48,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:48,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-30 02:06:48,747 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) [2023-08-30 02:06:48,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:48,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-30 02:06:48,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:49,339 INFO L130 PetriNetUnfolder]: 4744/7768 cut-off events. [2023-08-30 02:06:49,339 INFO L131 PetriNetUnfolder]: For 1133/1220 co-relation queries the response was YES. [2023-08-30 02:06:49,371 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. [2023-08-30 02:06:49,403 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 80 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-30 02:06:49,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 455 flow [2023-08-30 02:06:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1056 transitions. [2023-08-30 02:06:49,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44221105527638194 [2023-08-30 02:06:49,407 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1056 transitions. [2023-08-30 02:06:49,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1056 transitions. [2023-08-30 02:06:49,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:49,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1056 transitions. [2023-08-30 02:06:49,410 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) [2023-08-30 02:06:49,413 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) [2023-08-30 02:06:49,414 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) [2023-08-30 02:06:49,414 INFO L175 Difference]: Start difference. First operand has 89 places, 96 transitions, 293 flow. Second operand 3 states and 1056 transitions. [2023-08-30 02:06:49,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 455 flow [2023-08-30 02:06:49,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 453 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 02:06:49,421 INFO L231 Difference]: Finished difference. Result has 90 places, 95 transitions, 293 flow [2023-08-30 02:06:49,421 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} [2023-08-30 02:06:49,423 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -51 predicate places. [2023-08-30 02:06:49,424 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 293 flow [2023-08-30 02:06:49,424 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) [2023-08-30 02:06:49,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:49,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:49,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:06:49,425 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)] === [2023-08-30 02:06:49,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1386440553, now seen corresponding path program 1 times [2023-08-30 02:06:49,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:49,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547631481] [2023-08-30 02:06:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:49,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:49,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:49,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547631481] [2023-08-30 02:06:49,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547631481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:49,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:49,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:49,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097008064] [2023-08-30 02:06:49,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:49,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:49,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:49,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 796 [2023-08-30 02:06:49,691 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) [2023-08-30 02:06:49,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:49,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 796 [2023-08-30 02:06:49,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:50,072 INFO L130 PetriNetUnfolder]: 2928/4987 cut-off events. [2023-08-30 02:06:50,073 INFO L131 PetriNetUnfolder]: For 701/758 co-relation queries the response was YES. [2023-08-30 02:06:50,084 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. [2023-08-30 02:06:50,101 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 79 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-30 02:06:50,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 453 flow [2023-08-30 02:06:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-30 02:06:50,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43174204355108875 [2023-08-30 02:06:50,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-30 02:06:50,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-30 02:06:50,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:50,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-30 02:06:50,109 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) [2023-08-30 02:06:50,113 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) [2023-08-30 02:06:50,126 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) [2023-08-30 02:06:50,126 INFO L175 Difference]: Start difference. First operand has 90 places, 95 transitions, 293 flow. Second operand 3 states and 1031 transitions. [2023-08-30 02:06:50,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 453 flow [2023-08-30 02:06:50,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 94 transitions, 449 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:50,131 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 291 flow [2023-08-30 02:06:50,131 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} [2023-08-30 02:06:50,132 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-08-30 02:06:50,133 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 291 flow [2023-08-30 02:06:50,134 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) [2023-08-30 02:06:50,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:50,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 02:06:50,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:06:50,135 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:50,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 32222892, now seen corresponding path program 1 times [2023-08-30 02:06:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:50,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895294200] [2023-08-30 02:06:50,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:50,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:50,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:50,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895294200] [2023-08-30 02:06:50,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895294200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:50,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:50,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:06:50,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786019360] [2023-08-30 02:06:50,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:50,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:06:50,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:50,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:06:50,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:06:50,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 796 [2023-08-30 02:06:50,584 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) [2023-08-30 02:06:50,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:50,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 796 [2023-08-30 02:06:50,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:51,081 INFO L130 PetriNetUnfolder]: 2651/4507 cut-off events. [2023-08-30 02:06:51,082 INFO L131 PetriNetUnfolder]: For 634/634 co-relation queries the response was YES. [2023-08-30 02:06:51,088 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. [2023-08-30 02:06:51,097 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 123 selfloop transitions, 6 changer transitions 0/142 dead transitions. [2023-08-30 02:06:51,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 142 transitions, 660 flow [2023-08-30 02:06:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:06:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:06:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1670 transitions. [2023-08-30 02:06:51,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41959798994974873 [2023-08-30 02:06:51,102 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1670 transitions. [2023-08-30 02:06:51,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1670 transitions. [2023-08-30 02:06:51,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:51,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1670 transitions. [2023-08-30 02:06:51,106 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) [2023-08-30 02:06:51,111 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) [2023-08-30 02:06:51,111 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) [2023-08-30 02:06:51,112 INFO L175 Difference]: Start difference. First operand has 89 places, 94 transitions, 291 flow. Second operand 5 states and 1670 transitions. [2023-08-30 02:06:51,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 142 transitions, 660 flow [2023-08-30 02:06:51,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 142 transitions, 656 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:51,117 INFO L231 Difference]: Finished difference. Result has 87 places, 87 transitions, 265 flow [2023-08-30 02:06:51,118 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} [2023-08-30 02:06:51,119 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -54 predicate places. [2023-08-30 02:06:51,119 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 265 flow [2023-08-30 02:06:51,119 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) [2023-08-30 02:06:51,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:51,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:51,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:06:51,120 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:51,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1386512729, now seen corresponding path program 2 times [2023-08-30 02:06:51,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:51,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301005220] [2023-08-30 02:06:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:51,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:51,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301005220] [2023-08-30 02:06:51,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301005220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:51,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:51,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:06:51,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254475320] [2023-08-30 02:06:51,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:51,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:06:51,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:51,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:06:51,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:06:54,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 796 [2023-08-30 02:06:54,483 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) [2023-08-30 02:06:54,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:54,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 796 [2023-08-30 02:06:54,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:55,886 INFO L130 PetriNetUnfolder]: 2702/4547 cut-off events. [2023-08-30 02:06:55,887 INFO L131 PetriNetUnfolder]: For 1046/1046 co-relation queries the response was YES. [2023-08-30 02:06:55,898 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. [2023-08-30 02:06:55,911 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 96 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2023-08-30 02:06:55,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 116 transitions, 549 flow [2023-08-30 02:06:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:06:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:06:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1348 transitions. [2023-08-30 02:06:55,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42336683417085424 [2023-08-30 02:06:55,916 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1348 transitions. [2023-08-30 02:06:55,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1348 transitions. [2023-08-30 02:06:55,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:55,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1348 transitions. [2023-08-30 02:06:55,920 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) [2023-08-30 02:06:55,924 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) [2023-08-30 02:06:55,924 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) [2023-08-30 02:06:55,925 INFO L175 Difference]: Start difference. First operand has 87 places, 87 transitions, 265 flow. Second operand 4 states and 1348 transitions. [2023-08-30 02:06:55,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 116 transitions, 549 flow [2023-08-30 02:06:55,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 116 transitions, 536 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-30 02:06:55,929 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 298 flow [2023-08-30 02:06:55,930 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} [2023-08-30 02:06:55,930 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-08-30 02:06:55,930 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 298 flow [2023-08-30 02:06:55,931 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) [2023-08-30 02:06:55,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:55,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:55,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:06:55,931 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:55,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1249641130, now seen corresponding path program 1 times [2023-08-30 02:06:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:55,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725796379] [2023-08-30 02:06:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:55,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:55,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:55,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725796379] [2023-08-30 02:06:55,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725796379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:55,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:55,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:55,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100004074] [2023-08-30 02:06:55,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:55,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:55,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:55,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:55,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:55,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-30 02:06:55,999 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) [2023-08-30 02:06:56,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:56,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-30 02:06:56,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:56,377 INFO L130 PetriNetUnfolder]: 1767/3097 cut-off events. [2023-08-30 02:06:56,377 INFO L131 PetriNetUnfolder]: For 264/264 co-relation queries the response was YES. [2023-08-30 02:06:56,382 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. [2023-08-30 02:06:56,390 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 95 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2023-08-30 02:06:56,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 109 transitions, 492 flow [2023-08-30 02:06:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2023-08-30 02:06:56,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45226130653266333 [2023-08-30 02:06:56,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2023-08-30 02:06:56,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2023-08-30 02:06:56,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:56,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2023-08-30 02:06:56,398 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) [2023-08-30 02:06:56,401 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) [2023-08-30 02:06:56,402 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) [2023-08-30 02:06:56,402 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 298 flow. Second operand 3 states and 1080 transitions. [2023-08-30 02:06:56,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 109 transitions, 492 flow [2023-08-30 02:06:56,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 457 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 02:06:56,405 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 213 flow [2023-08-30 02:06:56,405 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} [2023-08-30 02:06:56,406 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -58 predicate places. [2023-08-30 02:06:56,406 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 213 flow [2023-08-30 02:06:56,407 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) [2023-08-30 02:06:56,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:56,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:56,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:06:56,407 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:56,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash 9126032, now seen corresponding path program 1 times [2023-08-30 02:06:56,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:56,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706882924] [2023-08-30 02:06:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:56,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:56,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706882924] [2023-08-30 02:06:56,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706882924] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:56,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:56,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:56,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286268766] [2023-08-30 02:06:56,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:56,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:56,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:56,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:56,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 796 [2023-08-30 02:06:56,647 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) [2023-08-30 02:06:56,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:56,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 796 [2023-08-30 02:06:56,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:56,964 INFO L130 PetriNetUnfolder]: 1648/2856 cut-off events. [2023-08-30 02:06:56,965 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-30 02:06:56,971 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. [2023-08-30 02:06:56,979 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 64 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-30 02:06:56,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 339 flow [2023-08-30 02:06:56,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1038 transitions. [2023-08-30 02:06:56,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43467336683417085 [2023-08-30 02:06:56,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1038 transitions. [2023-08-30 02:06:56,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1038 transitions. [2023-08-30 02:06:56,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:56,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1038 transitions. [2023-08-30 02:06:56,987 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) [2023-08-30 02:06:56,990 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) [2023-08-30 02:06:56,991 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) [2023-08-30 02:06:56,991 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 213 flow. Second operand 3 states and 1038 transitions. [2023-08-30 02:06:56,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 339 flow [2023-08-30 02:06:56,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:06:56,994 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 208 flow [2023-08-30 02:06:56,995 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} [2023-08-30 02:06:56,995 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -60 predicate places. [2023-08-30 02:06:56,996 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 208 flow [2023-08-30 02:06:56,996 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) [2023-08-30 02:06:56,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:56,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:56,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:06:56,997 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:56,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash 9126033, now seen corresponding path program 1 times [2023-08-30 02:06:56,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:56,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720050875] [2023-08-30 02:06:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:56,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:06:58,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:58,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720050875] [2023-08-30 02:06:58,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720050875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:58,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:58,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 02:06:58,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395823694] [2023-08-30 02:06:58,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:58,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:06:58,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:58,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:06:58,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:07:00,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 796 [2023-08-30 02:07:00,460 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) [2023-08-30 02:07:00,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:00,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 796 [2023-08-30 02:07:00,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:02,558 INFO L130 PetriNetUnfolder]: 1758/3010 cut-off events. [2023-08-30 02:07:02,558 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2023-08-30 02:07:02,562 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. [2023-08-30 02:07:02,567 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 68 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2023-08-30 02:07:02,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 394 flow [2023-08-30 02:07:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:07:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:07:02,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2228 transitions. [2023-08-30 02:07:02,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39985642498205315 [2023-08-30 02:07:02,573 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2228 transitions. [2023-08-30 02:07:02,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2228 transitions. [2023-08-30 02:07:02,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:02,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2228 transitions. [2023-08-30 02:07:02,577 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) [2023-08-30 02:07:02,583 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) [2023-08-30 02:07:02,584 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) [2023-08-30 02:07:02,584 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 208 flow. Second operand 7 states and 2228 transitions. [2023-08-30 02:07:02,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 394 flow [2023-08-30 02:07:02,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:07:02,587 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 267 flow [2023-08-30 02:07:02,587 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} [2023-08-30 02:07:02,587 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-08-30 02:07:02,588 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 267 flow [2023-08-30 02:07:02,588 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) [2023-08-30 02:07:02,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:02,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:02,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:07:02,589 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:02,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:02,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1126027934, now seen corresponding path program 1 times [2023-08-30 02:07:02,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:02,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587496784] [2023-08-30 02:07:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:02,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:03,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:03,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587496784] [2023-08-30 02:07:03,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587496784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:03,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:03,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:07:03,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422038220] [2023-08-30 02:07:03,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:03,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:07:03,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:03,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:07:03,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:07:08,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 796 [2023-08-30 02:07:08,002 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) [2023-08-30 02:07:08,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:08,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 796 [2023-08-30 02:07:08,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:09,188 INFO L130 PetriNetUnfolder]: 1838/3137 cut-off events. [2023-08-30 02:07:09,188 INFO L131 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2023-08-30 02:07:09,195 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. [2023-08-30 02:07:09,204 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 101 selfloop transitions, 16 changer transitions 0/125 dead transitions. [2023-08-30 02:07:09,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 595 flow [2023-08-30 02:07:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:07:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:07:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2234 transitions. [2023-08-30 02:07:09,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009332376166547 [2023-08-30 02:07:09,210 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2234 transitions. [2023-08-30 02:07:09,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2234 transitions. [2023-08-30 02:07:09,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:09,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2234 transitions. [2023-08-30 02:07:09,215 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) [2023-08-30 02:07:09,220 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) [2023-08-30 02:07:09,221 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) [2023-08-30 02:07:09,222 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 267 flow. Second operand 7 states and 2234 transitions. [2023-08-30 02:07:09,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 595 flow [2023-08-30 02:07:09,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 125 transitions, 577 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 02:07:09,225 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 317 flow [2023-08-30 02:07:09,226 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} [2023-08-30 02:07:09,226 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -47 predicate places. [2023-08-30 02:07:09,226 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 317 flow [2023-08-30 02:07:09,227 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) [2023-08-30 02:07:09,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:09,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:09,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:07:09,227 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:09,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash 286371520, now seen corresponding path program 2 times [2023-08-30 02:07:09,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:09,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738997883] [2023-08-30 02:07:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:09,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:09,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:09,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738997883] [2023-08-30 02:07:09,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738997883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:09,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:09,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:07:09,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815808435] [2023-08-30 02:07:09,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:09,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:07:09,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:09,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:07:09,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:07:09,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 796 [2023-08-30 02:07:09,599 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) [2023-08-30 02:07:09,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:09,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 796 [2023-08-30 02:07:09,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:09,888 INFO L130 PetriNetUnfolder]: 1702/2948 cut-off events. [2023-08-30 02:07:09,889 INFO L131 PetriNetUnfolder]: For 415/422 co-relation queries the response was YES. [2023-08-30 02:07:09,897 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. [2023-08-30 02:07:09,906 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 72 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-30 02:07:09,906 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 86 transitions, 463 flow [2023-08-30 02:07:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:07:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:07:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1371 transitions. [2023-08-30 02:07:09,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43059045226130654 [2023-08-30 02:07:09,910 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1371 transitions. [2023-08-30 02:07:09,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1371 transitions. [2023-08-30 02:07:09,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:09,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1371 transitions. [2023-08-30 02:07:09,914 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) [2023-08-30 02:07:09,920 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) [2023-08-30 02:07:09,921 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) [2023-08-30 02:07:09,921 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 317 flow. Second operand 4 states and 1371 transitions. [2023-08-30 02:07:09,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 86 transitions, 463 flow [2023-08-30 02:07:09,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 86 transitions, 437 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 02:07:09,924 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 293 flow [2023-08-30 02:07:09,925 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} [2023-08-30 02:07:09,926 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -48 predicate places. [2023-08-30 02:07:09,926 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 293 flow [2023-08-30 02:07:09,926 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) [2023-08-30 02:07:09,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:09,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:09,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:07:09,927 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:09,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:09,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1084821956, now seen corresponding path program 1 times [2023-08-30 02:07:09,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:09,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628967673] [2023-08-30 02:07:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:09,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:10,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:10,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628967673] [2023-08-30 02:07:10,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628967673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:10,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:10,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 02:07:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830556331] [2023-08-30 02:07:10,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:10,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:07:10,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:10,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:07:10,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:07:10,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 796 [2023-08-30 02:07:10,583 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) [2023-08-30 02:07:10,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:10,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 796 [2023-08-30 02:07:10,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:10,907 INFO L130 PetriNetUnfolder]: 1690/2953 cut-off events. [2023-08-30 02:07:10,907 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-30 02:07:10,913 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. [2023-08-30 02:07:10,919 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 88 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2023-08-30 02:07:10,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 107 transitions, 530 flow [2023-08-30 02:07:10,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:07:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:07:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2024 transitions. [2023-08-30 02:07:10,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423785594639866 [2023-08-30 02:07:10,923 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2024 transitions. [2023-08-30 02:07:10,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2024 transitions. [2023-08-30 02:07:10,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:10,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2024 transitions. [2023-08-30 02:07:10,926 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) [2023-08-30 02:07:10,931 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) [2023-08-30 02:07:10,932 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) [2023-08-30 02:07:10,932 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 293 flow. Second operand 6 states and 2024 transitions. [2023-08-30 02:07:10,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 107 transitions, 530 flow [2023-08-30 02:07:10,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 107 transitions, 527 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:07:10,936 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 302 flow [2023-08-30 02:07:10,936 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} [2023-08-30 02:07:10,937 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -46 predicate places. [2023-08-30 02:07:10,937 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 302 flow [2023-08-30 02:07:10,937 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) [2023-08-30 02:07:10,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:10,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:10,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:07:10,938 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:10,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:10,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1084820515, now seen corresponding path program 1 times [2023-08-30 02:07:10,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:10,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556900544] [2023-08-30 02:07:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:10,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:10,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:10,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556900544] [2023-08-30 02:07:10,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556900544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:10,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:10,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:07:10,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504089571] [2023-08-30 02:07:10,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:10,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:07:10,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:10,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:07:10,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:07:10,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-30 02:07:10,983 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) [2023-08-30 02:07:10,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:10,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-30 02:07:10,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:11,261 INFO L130 PetriNetUnfolder]: 1673/2907 cut-off events. [2023-08-30 02:07:11,261 INFO L131 PetriNetUnfolder]: For 382/389 co-relation queries the response was YES. [2023-08-30 02:07:11,267 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. [2023-08-30 02:07:11,273 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 75 selfloop transitions, 5 changer transitions 0/92 dead transitions. [2023-08-30 02:07:11,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 92 transitions, 479 flow [2023-08-30 02:07:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:07:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:07:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1053 transitions. [2023-08-30 02:07:11,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44095477386934673 [2023-08-30 02:07:11,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1053 transitions. [2023-08-30 02:07:11,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1053 transitions. [2023-08-30 02:07:11,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:11,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1053 transitions. [2023-08-30 02:07:11,277 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) [2023-08-30 02:07:11,280 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) [2023-08-30 02:07:11,280 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) [2023-08-30 02:07:11,280 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 302 flow. Second operand 3 states and 1053 transitions. [2023-08-30 02:07:11,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 92 transitions, 479 flow [2023-08-30 02:07:11,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 466 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:07:11,283 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 297 flow [2023-08-30 02:07:11,284 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} [2023-08-30 02:07:11,284 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -48 predicate places. [2023-08-30 02:07:11,284 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 297 flow [2023-08-30 02:07:11,285 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) [2023-08-30 02:07:11,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:11,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:11,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:07:11,285 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:11,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:11,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1163214184, now seen corresponding path program 1 times [2023-08-30 02:07:11,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:11,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657465884] [2023-08-30 02:07:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:11,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:11,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:11,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657465884] [2023-08-30 02:07:11,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657465884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:11,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:11,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:07:11,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456361800] [2023-08-30 02:07:11,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:11,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:07:11,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:07:11,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:07:12,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 796 [2023-08-30 02:07:12,516 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) [2023-08-30 02:07:12,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:12,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 796 [2023-08-30 02:07:12,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:12,945 INFO L130 PetriNetUnfolder]: 1888/3229 cut-off events. [2023-08-30 02:07:12,946 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2023-08-30 02:07:12,953 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. [2023-08-30 02:07:12,960 INFO L137 encePairwiseOnDemand]: 788/796 looper letters, 98 selfloop transitions, 19 changer transitions 0/125 dead transitions. [2023-08-30 02:07:12,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 125 transitions, 625 flow [2023-08-30 02:07:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:07:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:07:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2230 transitions. [2023-08-30 02:07:12,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002153625269203 [2023-08-30 02:07:12,964 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2230 transitions. [2023-08-30 02:07:12,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2230 transitions. [2023-08-30 02:07:12,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:12,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2230 transitions. [2023-08-30 02:07:12,968 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) [2023-08-30 02:07:12,973 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) [2023-08-30 02:07:12,974 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) [2023-08-30 02:07:12,974 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 297 flow. Second operand 7 states and 2230 transitions. [2023-08-30 02:07:12,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 125 transitions, 625 flow [2023-08-30 02:07:12,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 125 transitions, 613 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:07:12,979 INFO L231 Difference]: Finished difference. Result has 99 places, 87 transitions, 356 flow [2023-08-30 02:07:12,979 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} [2023-08-30 02:07:12,980 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -42 predicate places. [2023-08-30 02:07:12,980 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 87 transitions, 356 flow [2023-08-30 02:07:12,981 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) [2023-08-30 02:07:12,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:12,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:12,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:07:12,981 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:12,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1612714314, now seen corresponding path program 2 times [2023-08-30 02:07:12,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:12,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159194654] [2023-08-30 02:07:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:12,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:13,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:13,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159194654] [2023-08-30 02:07:13,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159194654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:13,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:13,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:07:13,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564602303] [2023-08-30 02:07:13,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:13,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:07:13,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:13,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:07:13,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:07:14,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 796 [2023-08-30 02:07:14,087 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) [2023-08-30 02:07:14,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:14,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 796 [2023-08-30 02:07:14,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:14,550 INFO L130 PetriNetUnfolder]: 1861/3193 cut-off events. [2023-08-30 02:07:14,550 INFO L131 PetriNetUnfolder]: For 473/473 co-relation queries the response was YES. [2023-08-30 02:07:14,557 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. [2023-08-30 02:07:14,563 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 91 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2023-08-30 02:07:14,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 113 transitions, 618 flow [2023-08-30 02:07:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:07:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:07:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1911 transitions. [2023-08-30 02:07:14,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4001256281407035 [2023-08-30 02:07:14,567 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1911 transitions. [2023-08-30 02:07:14,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1911 transitions. [2023-08-30 02:07:14,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:14,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1911 transitions. [2023-08-30 02:07:14,570 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) [2023-08-30 02:07:14,573 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) [2023-08-30 02:07:14,574 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) [2023-08-30 02:07:14,574 INFO L175 Difference]: Start difference. First operand has 99 places, 87 transitions, 356 flow. Second operand 6 states and 1911 transitions. [2023-08-30 02:07:14,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 113 transitions, 618 flow [2023-08-30 02:07:14,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 113 transitions, 604 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 02:07:14,579 INFO L231 Difference]: Finished difference. Result has 101 places, 85 transitions, 362 flow [2023-08-30 02:07:14,579 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} [2023-08-30 02:07:14,579 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -40 predicate places. [2023-08-30 02:07:14,579 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 85 transitions, 362 flow [2023-08-30 02:07:14,580 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) [2023-08-30 02:07:14,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:14,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:14,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:07:14,580 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:14,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:14,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1882925758, now seen corresponding path program 1 times [2023-08-30 02:07:14,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:14,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826416431] [2023-08-30 02:07:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:14,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:15,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:15,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826416431] [2023-08-30 02:07:15,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826416431] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:15,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:15,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 02:07:15,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866930605] [2023-08-30 02:07:15,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:15,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 02:07:15,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 02:07:15,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-30 02:07:16,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 796 [2023-08-30 02:07:16,650 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) [2023-08-30 02:07:16,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:16,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 796 [2023-08-30 02:07:16,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:17,263 INFO L130 PetriNetUnfolder]: 1860/3208 cut-off events. [2023-08-30 02:07:17,263 INFO L131 PetriNetUnfolder]: For 953/953 co-relation queries the response was YES. [2023-08-30 02:07:17,272 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. [2023-08-30 02:07:17,280 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 77 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2023-08-30 02:07:17,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 104 transitions, 606 flow [2023-08-30 02:07:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:07:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:07:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2999 transitions. [2023-08-30 02:07:17,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37675879396984924 [2023-08-30 02:07:17,286 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2999 transitions. [2023-08-30 02:07:17,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2999 transitions. [2023-08-30 02:07:17,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:17,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2999 transitions. [2023-08-30 02:07:17,295 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) [2023-08-30 02:07:17,301 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) [2023-08-30 02:07:17,301 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) [2023-08-30 02:07:17,302 INFO L175 Difference]: Start difference. First operand has 101 places, 85 transitions, 362 flow. Second operand 10 states and 2999 transitions. [2023-08-30 02:07:17,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 104 transitions, 606 flow [2023-08-30 02:07:17,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 104 transitions, 578 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-30 02:07:17,306 INFO L231 Difference]: Finished difference. Result has 109 places, 94 transitions, 432 flow [2023-08-30 02:07:17,306 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} [2023-08-30 02:07:17,306 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -32 predicate places. [2023-08-30 02:07:17,307 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 94 transitions, 432 flow [2023-08-30 02:07:17,307 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) [2023-08-30 02:07:17,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:17,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:17,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 02:07:17,308 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:17,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash 977727891, now seen corresponding path program 1 times [2023-08-30 02:07:17,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:17,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445763136] [2023-08-30 02:07:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:17,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:18,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:18,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445763136] [2023-08-30 02:07:18,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445763136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:18,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:18,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-30 02:07:18,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833001114] [2023-08-30 02:07:18,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:18,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:07:18,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:18,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:07:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:07:20,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 796 [2023-08-30 02:07:20,517 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) [2023-08-30 02:07:20,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:20,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 796 [2023-08-30 02:07:20,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:21,410 INFO L130 PetriNetUnfolder]: 2057/3538 cut-off events. [2023-08-30 02:07:21,410 INFO L131 PetriNetUnfolder]: For 540/540 co-relation queries the response was YES. [2023-08-30 02:07:21,417 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. [2023-08-30 02:07:21,424 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 131 selfloop transitions, 27 changer transitions 0/166 dead transitions. [2023-08-30 02:07:21,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 166 transitions, 912 flow [2023-08-30 02:07:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:07:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:07:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2991 transitions. [2023-08-30 02:07:21,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757537688442211 [2023-08-30 02:07:21,428 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2991 transitions. [2023-08-30 02:07:21,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2991 transitions. [2023-08-30 02:07:21,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:21,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2991 transitions. [2023-08-30 02:07:21,431 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) [2023-08-30 02:07:21,435 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) [2023-08-30 02:07:21,436 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) [2023-08-30 02:07:21,436 INFO L175 Difference]: Start difference. First operand has 109 places, 94 transitions, 432 flow. Second operand 10 states and 2991 transitions. [2023-08-30 02:07:21,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 166 transitions, 912 flow [2023-08-30 02:07:21,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 166 transitions, 882 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-30 02:07:21,442 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 504 flow [2023-08-30 02:07:21,442 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} [2023-08-30 02:07:21,442 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -25 predicate places. [2023-08-30 02:07:21,442 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 504 flow [2023-08-30 02:07:21,443 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) [2023-08-30 02:07:21,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:21,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:21,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 02:07:21,443 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:21,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:21,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1758776753, now seen corresponding path program 2 times [2023-08-30 02:07:21,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:21,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992003919] [2023-08-30 02:07:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:21,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:22,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:22,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992003919] [2023-08-30 02:07:22,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992003919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:22,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:22,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-30 02:07:22,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932314672] [2023-08-30 02:07:22,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:22,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 02:07:22,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:22,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 02:07:22,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-30 02:07:24,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 796 [2023-08-30 02:07:24,671 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) [2023-08-30 02:07:24,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:24,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 796 [2023-08-30 02:07:24,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:25,423 INFO L130 PetriNetUnfolder]: 2121/3662 cut-off events. [2023-08-30 02:07:25,423 INFO L131 PetriNetUnfolder]: For 882/882 co-relation queries the response was YES. [2023-08-30 02:07:25,434 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. [2023-08-30 02:07:25,442 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 128 selfloop transitions, 29 changer transitions 0/164 dead transitions. [2023-08-30 02:07:25,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 164 transitions, 961 flow [2023-08-30 02:07:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:07:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:07:25,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3006 transitions. [2023-08-30 02:07:25,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37763819095477386 [2023-08-30 02:07:25,445 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3006 transitions. [2023-08-30 02:07:25,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3006 transitions. [2023-08-30 02:07:25,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:25,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3006 transitions. [2023-08-30 02:07:25,448 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) [2023-08-30 02:07:25,453 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) [2023-08-30 02:07:25,454 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) [2023-08-30 02:07:25,454 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 504 flow. Second operand 10 states and 3006 transitions. [2023-08-30 02:07:25,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 164 transitions, 961 flow [2023-08-30 02:07:25,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 164 transitions, 918 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-30 02:07:25,462 INFO L231 Difference]: Finished difference. Result has 118 places, 98 transitions, 537 flow [2023-08-30 02:07:25,462 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} [2023-08-30 02:07:25,463 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -23 predicate places. [2023-08-30 02:07:25,463 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 537 flow [2023-08-30 02:07:25,463 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) [2023-08-30 02:07:25,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:25,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:25,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 02:07:25,464 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:25,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1993547270, now seen corresponding path program 1 times [2023-08-30 02:07:25,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:25,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904954860] [2023-08-30 02:07:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:25,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:26,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:26,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904954860] [2023-08-30 02:07:26,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904954860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:26,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:26,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-30 02:07:26,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249444468] [2023-08-30 02:07:26,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:26,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 02:07:26,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:26,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 02:07:26,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-30 02:07:28,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-30 02:07:28,351 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) [2023-08-30 02:07:28,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:28,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-30 02:07:28,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:29,143 INFO L130 PetriNetUnfolder]: 2317/4021 cut-off events. [2023-08-30 02:07:29,143 INFO L131 PetriNetUnfolder]: For 1444/1444 co-relation queries the response was YES. [2023-08-30 02:07:29,154 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. [2023-08-30 02:07:29,164 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 121 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2023-08-30 02:07:29,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 153 transitions, 1001 flow [2023-08-30 02:07:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 02:07:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 02:07:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3416 transitions. [2023-08-30 02:07:29,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3576214405360134 [2023-08-30 02:07:29,167 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3416 transitions. [2023-08-30 02:07:29,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3416 transitions. [2023-08-30 02:07:29,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:29,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3416 transitions. [2023-08-30 02:07:29,171 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) [2023-08-30 02:07:29,179 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) [2023-08-30 02:07:29,180 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) [2023-08-30 02:07:29,180 INFO L175 Difference]: Start difference. First operand has 118 places, 98 transitions, 537 flow. Second operand 12 states and 3416 transitions. [2023-08-30 02:07:29,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 153 transitions, 1001 flow [2023-08-30 02:07:29,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 153 transitions, 949 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 02:07:29,194 INFO L231 Difference]: Finished difference. Result has 126 places, 105 transitions, 626 flow [2023-08-30 02:07:29,194 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} [2023-08-30 02:07:29,195 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -15 predicate places. [2023-08-30 02:07:29,195 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 105 transitions, 626 flow [2023-08-30 02:07:29,196 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) [2023-08-30 02:07:29,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:29,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:29,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 02:07:29,197 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:29,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:29,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1001777143, now seen corresponding path program 1 times [2023-08-30 02:07:29,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:29,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809831625] [2023-08-30 02:07:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:29,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:30,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:30,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809831625] [2023-08-30 02:07:30,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809831625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:30,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:30,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 02:07:30,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203948722] [2023-08-30 02:07:30,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:30,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:07:30,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:30,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:07:30,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:07:40,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-30 02:07:40,970 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) [2023-08-30 02:07:40,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:40,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-30 02:07:40,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:44,078 INFO L130 PetriNetUnfolder]: 2578/4460 cut-off events. [2023-08-30 02:07:44,078 INFO L131 PetriNetUnfolder]: For 1443/1443 co-relation queries the response was YES. [2023-08-30 02:07:44,093 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. [2023-08-30 02:07:44,103 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 155 selfloop transitions, 40 changer transitions 0/202 dead transitions. [2023-08-30 02:07:44,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 1275 flow [2023-08-30 02:07:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 02:07:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 02:07:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3730 transitions. [2023-08-30 02:07:44,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604561267877851 [2023-08-30 02:07:44,108 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3730 transitions. [2023-08-30 02:07:44,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3730 transitions. [2023-08-30 02:07:44,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:44,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3730 transitions. [2023-08-30 02:07:44,114 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) [2023-08-30 02:07:44,121 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) [2023-08-30 02:07:44,122 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) [2023-08-30 02:07:44,122 INFO L175 Difference]: Start difference. First operand has 126 places, 105 transitions, 626 flow. Second operand 13 states and 3730 transitions. [2023-08-30 02:07:44,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 1275 flow [2023-08-30 02:07:44,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 202 transitions, 1240 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 02:07:44,135 INFO L231 Difference]: Finished difference. Result has 139 places, 112 transitions, 794 flow [2023-08-30 02:07:44,136 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} [2023-08-30 02:07:44,136 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -2 predicate places. [2023-08-30 02:07:44,136 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 112 transitions, 794 flow [2023-08-30 02:07:44,137 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) [2023-08-30 02:07:44,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:44,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:44,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 02:07:44,138 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:44,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1617294419, now seen corresponding path program 2 times [2023-08-30 02:07:44,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:44,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984457530] [2023-08-30 02:07:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:44,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:45,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:45,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984457530] [2023-08-30 02:07:45,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984457530] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:45,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:45,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 02:07:45,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297459175] [2023-08-30 02:07:45,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:45,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:07:45,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:07:45,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:07:47,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 796 [2023-08-30 02:07:47,701 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) [2023-08-30 02:07:47,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:47,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 796 [2023-08-30 02:07:47,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:48,745 INFO L130 PetriNetUnfolder]: 2562/4435 cut-off events. [2023-08-30 02:07:48,745 INFO L131 PetriNetUnfolder]: For 2762/2762 co-relation queries the response was YES. [2023-08-30 02:07:48,762 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. [2023-08-30 02:07:48,772 INFO L137 encePairwiseOnDemand]: 784/796 looper letters, 139 selfloop transitions, 40 changer transitions 0/186 dead transitions. [2023-08-30 02:07:48,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 1318 flow [2023-08-30 02:07:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 02:07:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 02:07:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3139 transitions. [2023-08-30 02:07:48,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35849703060758337 [2023-08-30 02:07:48,776 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3139 transitions. [2023-08-30 02:07:48,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3139 transitions. [2023-08-30 02:07:48,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:48,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3139 transitions. [2023-08-30 02:07:48,781 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) [2023-08-30 02:07:48,786 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) [2023-08-30 02:07:48,787 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) [2023-08-30 02:07:48,787 INFO L175 Difference]: Start difference. First operand has 139 places, 112 transitions, 794 flow. Second operand 11 states and 3139 transitions. [2023-08-30 02:07:48,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 1318 flow [2023-08-30 02:07:48,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 1272 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 02:07:48,807 INFO L231 Difference]: Finished difference. Result has 146 places, 113 transitions, 855 flow [2023-08-30 02:07:48,808 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} [2023-08-30 02:07:48,808 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 5 predicate places. [2023-08-30 02:07:48,808 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 113 transitions, 855 flow [2023-08-30 02:07:48,809 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) [2023-08-30 02:07:48,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:48,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:48,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 02:07:48,809 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:48,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:48,810 INFO L85 PathProgramCache]: Analyzing trace with hash 518044755, now seen corresponding path program 3 times [2023-08-30 02:07:48,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:48,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617197085] [2023-08-30 02:07:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:48,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:48,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:49,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617197085] [2023-08-30 02:07:49,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617197085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:49,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:49,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 02:07:49,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216461259] [2023-08-30 02:07:49,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:49,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:07:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:07:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:07:52,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-30 02:07:52,057 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) [2023-08-30 02:07:52,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:52,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-30 02:07:52,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:53,060 INFO L130 PetriNetUnfolder]: 2593/4487 cut-off events. [2023-08-30 02:07:53,060 INFO L131 PetriNetUnfolder]: For 3344/3344 co-relation queries the response was YES. [2023-08-30 02:07:53,078 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. [2023-08-30 02:07:53,087 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 145 selfloop transitions, 43 changer transitions 0/195 dead transitions. [2023-08-30 02:07:53,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 195 transitions, 1419 flow [2023-08-30 02:07:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 02:07:53,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 02:07:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3716 transitions. [2023-08-30 02:07:53,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3591032083494395 [2023-08-30 02:07:53,090 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3716 transitions. [2023-08-30 02:07:53,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3716 transitions. [2023-08-30 02:07:53,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:53,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3716 transitions. [2023-08-30 02:07:53,095 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) [2023-08-30 02:07:53,101 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) [2023-08-30 02:07:53,102 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) [2023-08-30 02:07:53,103 INFO L175 Difference]: Start difference. First operand has 146 places, 113 transitions, 855 flow. Second operand 13 states and 3716 transitions. [2023-08-30 02:07:53,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 195 transitions, 1419 flow [2023-08-30 02:07:53,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 195 transitions, 1340 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-30 02:07:53,124 INFO L231 Difference]: Finished difference. Result has 152 places, 115 transitions, 902 flow [2023-08-30 02:07:53,124 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} [2023-08-30 02:07:53,124 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 11 predicate places. [2023-08-30 02:07:53,125 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 115 transitions, 902 flow [2023-08-30 02:07:53,125 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) [2023-08-30 02:07:53,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:53,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:53,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 02:07:53,126 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:53,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:53,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1670417789, now seen corresponding path program 4 times [2023-08-30 02:07:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:53,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210033241] [2023-08-30 02:07:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:07:54,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:54,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210033241] [2023-08-30 02:07:54,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210033241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:54,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:54,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-30 02:07:54,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123089807] [2023-08-30 02:07:54,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:54,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:07:54,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:54,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:07:54,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:08:02,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 796 [2023-08-30 02:08:02,505 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) [2023-08-30 02:08:02,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:02,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 796 [2023-08-30 02:08:02,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:04,137 INFO L130 PetriNetUnfolder]: 2577/4474 cut-off events. [2023-08-30 02:08:04,137 INFO L131 PetriNetUnfolder]: For 4020/4020 co-relation queries the response was YES. [2023-08-30 02:08:04,155 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. [2023-08-30 02:08:04,165 INFO L137 encePairwiseOnDemand]: 783/796 looper letters, 141 selfloop transitions, 45 changer transitions 0/193 dead transitions. [2023-08-30 02:08:04,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 193 transitions, 1442 flow [2023-08-30 02:08:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 02:08:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 02:08:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3439 transitions. [2023-08-30 02:08:04,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3600293132328308 [2023-08-30 02:08:04,169 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3439 transitions. [2023-08-30 02:08:04,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3439 transitions. [2023-08-30 02:08:04,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:04,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3439 transitions. [2023-08-30 02:08:04,174 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) [2023-08-30 02:08:04,180 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) [2023-08-30 02:08:04,180 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) [2023-08-30 02:08:04,180 INFO L175 Difference]: Start difference. First operand has 152 places, 115 transitions, 902 flow. Second operand 12 states and 3439 transitions. [2023-08-30 02:08:04,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 193 transitions, 1442 flow [2023-08-30 02:08:04,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 193 transitions, 1347 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-08-30 02:08:04,200 INFO L231 Difference]: Finished difference. Result has 153 places, 115 transitions, 909 flow [2023-08-30 02:08:04,200 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} [2023-08-30 02:08:04,200 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 12 predicate places. [2023-08-30 02:08:04,201 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 115 transitions, 909 flow [2023-08-30 02:08:04,201 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) [2023-08-30 02:08:04,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:04,201 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] [2023-08-30 02:08:04,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 02:08:04,202 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:04,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:04,202 INFO L85 PathProgramCache]: Analyzing trace with hash -816584116, now seen corresponding path program 1 times [2023-08-30 02:08:04,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:04,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924472412] [2023-08-30 02:08:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:04,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:04,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:08:04,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:04,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924472412] [2023-08-30 02:08:04,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924472412] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:04,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:04,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:08:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025140726] [2023-08-30 02:08:04,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:08:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:08:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:08:04,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 796 [2023-08-30 02:08:04,531 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) [2023-08-30 02:08:04,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:04,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 796 [2023-08-30 02:08:04,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:04,998 INFO L130 PetriNetUnfolder]: 3075/5387 cut-off events. [2023-08-30 02:08:04,999 INFO L131 PetriNetUnfolder]: For 6047/6081 co-relation queries the response was YES. [2023-08-30 02:08:05,019 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. [2023-08-30 02:08:05,030 INFO L137 encePairwiseOnDemand]: 791/796 looper letters, 136 selfloop transitions, 3 changer transitions 0/157 dead transitions. [2023-08-30 02:08:05,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 157 transitions, 1356 flow [2023-08-30 02:08:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:08:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:08:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1392 transitions. [2023-08-30 02:08:05,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371859296482412 [2023-08-30 02:08:05,032 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1392 transitions. [2023-08-30 02:08:05,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1392 transitions. [2023-08-30 02:08:05,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:05,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1392 transitions. [2023-08-30 02:08:05,034 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) [2023-08-30 02:08:05,036 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) [2023-08-30 02:08:05,036 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) [2023-08-30 02:08:05,037 INFO L175 Difference]: Start difference. First operand has 153 places, 115 transitions, 909 flow. Second operand 4 states and 1392 transitions. [2023-08-30 02:08:05,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 157 transitions, 1356 flow [2023-08-30 02:08:05,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 157 transitions, 1269 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-30 02:08:05,059 INFO L231 Difference]: Finished difference. Result has 147 places, 116 transitions, 843 flow [2023-08-30 02:08:05,060 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} [2023-08-30 02:08:05,060 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 6 predicate places. [2023-08-30 02:08:05,061 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 116 transitions, 843 flow [2023-08-30 02:08:05,061 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) [2023-08-30 02:08:05,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:05,061 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] [2023-08-30 02:08:05,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 02:08:05,061 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:05,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1801802691, now seen corresponding path program 1 times [2023-08-30 02:08:05,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:05,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545792315] [2023-08-30 02:08:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:05,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:08:05,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:05,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545792315] [2023-08-30 02:08:05,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545792315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:05,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:05,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:08:05,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261775380] [2023-08-30 02:08:05,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:05,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:08:05,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:08:05,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:08:05,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 796 [2023-08-30 02:08:05,113 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) [2023-08-30 02:08:05,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:05,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 796 [2023-08-30 02:08:05,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:05,518 INFO L130 PetriNetUnfolder]: 2123/3787 cut-off events. [2023-08-30 02:08:05,519 INFO L131 PetriNetUnfolder]: For 4523/4557 co-relation queries the response was YES. [2023-08-30 02:08:05,530 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. [2023-08-30 02:08:05,537 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 114 selfloop transitions, 3 changer transitions 1/133 dead transitions. [2023-08-30 02:08:05,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 133 transitions, 1136 flow [2023-08-30 02:08:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:08:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:08:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2023-08-30 02:08:05,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426298157453936 [2023-08-30 02:08:05,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2023-08-30 02:08:05,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2023-08-30 02:08:05,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:05,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2023-08-30 02:08:05,540 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) [2023-08-30 02:08:05,541 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) [2023-08-30 02:08:05,541 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) [2023-08-30 02:08:05,541 INFO L175 Difference]: Start difference. First operand has 147 places, 116 transitions, 843 flow. Second operand 3 states and 1057 transitions. [2023-08-30 02:08:05,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 133 transitions, 1136 flow [2023-08-30 02:08:05,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 133 transitions, 1128 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:08:05,554 INFO L231 Difference]: Finished difference. Result has 148 places, 115 transitions, 856 flow [2023-08-30 02:08:05,554 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} [2023-08-30 02:08:05,555 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 7 predicate places. [2023-08-30 02:08:05,555 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 115 transitions, 856 flow [2023-08-30 02:08:05,555 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) [2023-08-30 02:08:05,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:05,556 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] [2023-08-30 02:08:05,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 02:08:05,556 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)] === [2023-08-30 02:08:05,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1071183114, now seen corresponding path program 1 times [2023-08-30 02:08:05,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:05,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178525668] [2023-08-30 02:08:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:05,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:08:05,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:05,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178525668] [2023-08-30 02:08:05,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178525668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:05,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:05,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:08:05,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336125103] [2023-08-30 02:08:05,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:05,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:08:05,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:05,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:08:05,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:08:05,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 796 [2023-08-30 02:08:05,631 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) [2023-08-30 02:08:05,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:05,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 796 [2023-08-30 02:08:05,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:06,306 INFO L130 PetriNetUnfolder]: 3219/5893 cut-off events. [2023-08-30 02:08:06,306 INFO L131 PetriNetUnfolder]: For 7428/7506 co-relation queries the response was YES. [2023-08-30 02:08:06,345 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. [2023-08-30 02:08:06,363 INFO L137 encePairwiseOnDemand]: 793/796 looper letters, 166 selfloop transitions, 2 changer transitions 0/185 dead transitions. [2023-08-30 02:08:06,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 185 transitions, 1623 flow [2023-08-30 02:08:06,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:08:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:08:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1092 transitions. [2023-08-30 02:08:06,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.457286432160804 [2023-08-30 02:08:06,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1092 transitions. [2023-08-30 02:08:06,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1092 transitions. [2023-08-30 02:08:06,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:06,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1092 transitions. [2023-08-30 02:08:06,368 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) [2023-08-30 02:08:06,369 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) [2023-08-30 02:08:06,370 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) [2023-08-30 02:08:06,370 INFO L175 Difference]: Start difference. First operand has 148 places, 115 transitions, 856 flow. Second operand 3 states and 1092 transitions. [2023-08-30 02:08:06,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 185 transitions, 1623 flow [2023-08-30 02:08:06,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 185 transitions, 1615 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:08:06,393 INFO L231 Difference]: Finished difference. Result has 148 places, 116 transitions, 862 flow [2023-08-30 02:08:06,393 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} [2023-08-30 02:08:06,394 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 7 predicate places. [2023-08-30 02:08:06,394 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 116 transitions, 862 flow [2023-08-30 02:08:06,394 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) [2023-08-30 02:08:06,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:06,394 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] [2023-08-30 02:08:06,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-30 02:08:06,395 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:06,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash -139855902, now seen corresponding path program 1 times [2023-08-30 02:08:06,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:06,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118342832] [2023-08-30 02:08:06,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:06,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:08:06,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:06,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118342832] [2023-08-30 02:08:06,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118342832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:06,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:06,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:08:06,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178014466] [2023-08-30 02:08:06,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:06,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:08:06,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:06,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:08:06,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:08:06,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 796 [2023-08-30 02:08:06,540 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) [2023-08-30 02:08:06,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:06,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 796 [2023-08-30 02:08:06,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:07,049 INFO L130 PetriNetUnfolder]: 2356/4348 cut-off events. [2023-08-30 02:08:07,050 INFO L131 PetriNetUnfolder]: For 4930/4935 co-relation queries the response was YES. [2023-08-30 02:08:07,083 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. [2023-08-30 02:08:07,097 INFO L137 encePairwiseOnDemand]: 790/796 looper letters, 107 selfloop transitions, 7 changer transitions 0/129 dead transitions. [2023-08-30 02:08:07,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 129 transitions, 1146 flow [2023-08-30 02:08:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:08:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:08:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1046 transitions. [2023-08-30 02:08:07,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380234505862647 [2023-08-30 02:08:07,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1046 transitions. [2023-08-30 02:08:07,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1046 transitions. [2023-08-30 02:08:07,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:07,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1046 transitions. [2023-08-30 02:08:07,102 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) [2023-08-30 02:08:07,104 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) [2023-08-30 02:08:07,104 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) [2023-08-30 02:08:07,104 INFO L175 Difference]: Start difference. First operand has 148 places, 116 transitions, 862 flow. Second operand 3 states and 1046 transitions. [2023-08-30 02:08:07,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 129 transitions, 1146 flow [2023-08-30 02:08:07,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 129 transitions, 1142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:08:07,123 INFO L231 Difference]: Finished difference. Result has 149 places, 116 transitions, 874 flow [2023-08-30 02:08:07,123 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} [2023-08-30 02:08:07,124 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 8 predicate places. [2023-08-30 02:08:07,125 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 116 transitions, 874 flow [2023-08-30 02:08:07,125 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) [2023-08-30 02:08:07,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:07,125 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] [2023-08-30 02:08:07,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-30 02:08:07,126 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)] === [2023-08-30 02:08:07,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 229051555, now seen corresponding path program 1 times [2023-08-30 02:08:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:07,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007977879] [2023-08-30 02:08:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:08:07,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:07,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007977879] [2023-08-30 02:08:07,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007977879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:08:07,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030163924] [2023-08-30 02:08:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:07,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:08:07,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:08:07,209 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) [2023-08-30 02:08:07,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 02:08:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:07,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:08:07,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:08:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:08:07,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:08:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 02:08:07,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030163924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:08:07,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:08:07,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 02:08:07,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591289500] [2023-08-30 02:08:07,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:08:07,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:08:07,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:07,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:08:07,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:08:07,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 796 [2023-08-30 02:08:07,567 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) [2023-08-30 02:08:07,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:07,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 796 [2023-08-30 02:08:07,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:08,613 INFO L130 PetriNetUnfolder]: 3674/7206 cut-off events. [2023-08-30 02:08:08,613 INFO L131 PetriNetUnfolder]: For 8832/8888 co-relation queries the response was YES. [2023-08-30 02:08:08,635 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. [2023-08-30 02:08:08,649 INFO L137 encePairwiseOnDemand]: 792/796 looper letters, 306 selfloop transitions, 6 changer transitions 0/329 dead transitions. [2023-08-30 02:08:08,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 329 transitions, 2744 flow [2023-08-30 02:08:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:08:08,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:08:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2201 transitions. [2023-08-30 02:08:08,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608458961474037 [2023-08-30 02:08:08,652 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2201 transitions. [2023-08-30 02:08:08,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2201 transitions. [2023-08-30 02:08:08,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:08,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2201 transitions. [2023-08-30 02:08:08,654 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) [2023-08-30 02:08:08,657 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) [2023-08-30 02:08:08,657 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) [2023-08-30 02:08:08,657 INFO L175 Difference]: Start difference. First operand has 149 places, 116 transitions, 874 flow. Second operand 6 states and 2201 transitions. [2023-08-30 02:08:08,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 329 transitions, 2744 flow [2023-08-30 02:08:08,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 329 transitions, 2721 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:08:08,679 INFO L231 Difference]: Finished difference. Result has 157 places, 119 transitions, 908 flow [2023-08-30 02:08:08,679 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} [2023-08-30 02:08:08,680 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 16 predicate places. [2023-08-30 02:08:08,680 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 119 transitions, 908 flow [2023-08-30 02:08:08,680 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) [2023-08-30 02:08:08,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:08,680 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] [2023-08-30 02:08:08,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 02:08:08,887 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 [2023-08-30 02:08:08,887 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:08,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:08,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1443675116, now seen corresponding path program 1 times [2023-08-30 02:08:08,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:08,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001236195] [2023-08-30 02:08:08,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:08,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:08:10,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:10,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001236195] [2023-08-30 02:08:10,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001236195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:10,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:10,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-30 02:08:10,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416619108] [2023-08-30 02:08:10,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:10,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 02:08:10,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:10,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 02:08:10,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-30 02:08:18,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 796 [2023-08-30 02:08:18,882 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) [2023-08-30 02:08:18,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:18,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 796 [2023-08-30 02:08:18,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:21,056 INFO L130 PetriNetUnfolder]: 4044/7752 cut-off events. [2023-08-30 02:08:21,056 INFO L131 PetriNetUnfolder]: For 14631/14631 co-relation queries the response was YES. [2023-08-30 02:08:21,094 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. [2023-08-30 02:08:21,113 INFO L137 encePairwiseOnDemand]: 778/796 looper letters, 206 selfloop transitions, 50 changer transitions 0/262 dead transitions. [2023-08-30 02:08:21,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 262 transitions, 2275 flow [2023-08-30 02:08:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 02:08:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 02:08:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5004 transitions. [2023-08-30 02:08:21,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697901271061188 [2023-08-30 02:08:21,117 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5004 transitions. [2023-08-30 02:08:21,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5004 transitions. [2023-08-30 02:08:21,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:21,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5004 transitions. [2023-08-30 02:08:21,122 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) [2023-08-30 02:08:21,130 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) [2023-08-30 02:08:21,131 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) [2023-08-30 02:08:21,132 INFO L175 Difference]: Start difference. First operand has 157 places, 119 transitions, 908 flow. Second operand 17 states and 5004 transitions. [2023-08-30 02:08:21,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 262 transitions, 2275 flow [2023-08-30 02:08:21,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 262 transitions, 2161 flow, removed 42 selfloop flow, removed 1 redundant places. [2023-08-30 02:08:21,170 INFO L231 Difference]: Finished difference. Result has 177 places, 132 transitions, 1102 flow [2023-08-30 02:08:21,170 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} [2023-08-30 02:08:21,170 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 36 predicate places. [2023-08-30 02:08:21,171 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 132 transitions, 1102 flow [2023-08-30 02:08:21,171 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) [2023-08-30 02:08:21,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:21,172 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] [2023-08-30 02:08:21,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 02:08:21,172 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:21,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:21,172 INFO L85 PathProgramCache]: Analyzing trace with hash 168132684, now seen corresponding path program 2 times [2023-08-30 02:08:21,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:21,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738356310] [2023-08-30 02:08:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:21,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:08:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:22,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738356310] [2023-08-30 02:08:22,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738356310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:22,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:22,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-30 02:08:22,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796178662] [2023-08-30 02:08:22,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 02:08:22,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 02:08:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-30 02:08:24,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 796 [2023-08-30 02:08:24,954 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) [2023-08-30 02:08:24,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:24,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 796 [2023-08-30 02:08:24,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:26,384 INFO L130 PetriNetUnfolder]: 4130/7939 cut-off events. [2023-08-30 02:08:26,384 INFO L131 PetriNetUnfolder]: For 13855/13855 co-relation queries the response was YES. [2023-08-30 02:08:26,430 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. [2023-08-30 02:08:26,449 INFO L137 encePairwiseOnDemand]: 779/796 looper letters, 194 selfloop transitions, 54 changer transitions 0/254 dead transitions. [2023-08-30 02:08:26,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 254 transitions, 2244 flow [2023-08-30 02:08:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 02:08:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 02:08:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4419 transitions. [2023-08-30 02:08:26,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701005025125628 [2023-08-30 02:08:26,452 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4419 transitions. [2023-08-30 02:08:26,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4419 transitions. [2023-08-30 02:08:26,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:26,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4419 transitions. [2023-08-30 02:08:26,456 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) [2023-08-30 02:08:26,461 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) [2023-08-30 02:08:26,461 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) [2023-08-30 02:08:26,461 INFO L175 Difference]: Start difference. First operand has 177 places, 132 transitions, 1102 flow. Second operand 15 states and 4419 transitions. [2023-08-30 02:08:26,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 254 transitions, 2244 flow [2023-08-30 02:08:26,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 254 transitions, 2174 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-08-30 02:08:26,500 INFO L231 Difference]: Finished difference. Result has 184 places, 137 transitions, 1198 flow [2023-08-30 02:08:26,500 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} [2023-08-30 02:08:26,501 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 43 predicate places. [2023-08-30 02:08:26,501 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 137 transitions, 1198 flow [2023-08-30 02:08:26,501 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) [2023-08-30 02:08:26,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:26,501 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] [2023-08-30 02:08:26,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-30 02:08:26,502 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:26,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:26,502 INFO L85 PathProgramCache]: Analyzing trace with hash -838975280, now seen corresponding path program 3 times [2023-08-30 02:08:26,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:26,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608889178] [2023-08-30 02:08:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:26,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:08:27,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:27,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608889178] [2023-08-30 02:08:27,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608889178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:27,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:27,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-30 02:08:27,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018714775] [2023-08-30 02:08:27,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:27,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 02:08:27,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 02:08:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-08-30 02:08:30,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 796 [2023-08-30 02:08:30,517 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) [2023-08-30 02:08:30,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:30,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 796 [2023-08-30 02:08:30,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:32,177 INFO L130 PetriNetUnfolder]: 4713/9104 cut-off events. [2023-08-30 02:08:32,178 INFO L131 PetriNetUnfolder]: For 16239/16239 co-relation queries the response was YES. [2023-08-30 02:08:32,220 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. [2023-08-30 02:08:32,240 INFO L137 encePairwiseOnDemand]: 775/796 looper letters, 206 selfloop transitions, 65 changer transitions 0/277 dead transitions. [2023-08-30 02:08:32,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 277 transitions, 2458 flow [2023-08-30 02:08:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 02:08:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 02:08:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 5004 transitions. [2023-08-30 02:08:32,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697901271061188 [2023-08-30 02:08:32,246 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 5004 transitions. [2023-08-30 02:08:32,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 5004 transitions. [2023-08-30 02:08:32,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:32,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 5004 transitions. [2023-08-30 02:08:32,251 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) [2023-08-30 02:08:32,259 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) [2023-08-30 02:08:32,260 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) [2023-08-30 02:08:32,261 INFO L175 Difference]: Start difference. First operand has 184 places, 137 transitions, 1198 flow. Second operand 17 states and 5004 transitions. [2023-08-30 02:08:32,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 277 transitions, 2458 flow [2023-08-30 02:08:32,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 277 transitions, 2347 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-30 02:08:32,316 INFO L231 Difference]: Finished difference. Result has 193 places, 146 transitions, 1344 flow [2023-08-30 02:08:32,316 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} [2023-08-30 02:08:32,317 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 52 predicate places. [2023-08-30 02:08:32,317 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 146 transitions, 1344 flow [2023-08-30 02:08:32,318 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) [2023-08-30 02:08:32,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:32,318 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] [2023-08-30 02:08:32,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-30 02:08:32,318 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:32,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:32,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1101537724, now seen corresponding path program 4 times [2023-08-30 02:08:32,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:32,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069138475] [2023-08-30 02:08:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:32,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:08:33,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:33,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069138475] [2023-08-30 02:08:33,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069138475] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:33,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:33,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-30 02:08:33,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677560427] [2023-08-30 02:08:33,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:33,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 02:08:33,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:33,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 02:08:33,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-30 02:08:35,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 796 [2023-08-30 02:08:35,800 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) [2023-08-30 02:08:35,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:35,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 796 [2023-08-30 02:08:35,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:37,230 INFO L130 PetriNetUnfolder]: 4092/7965 cut-off events. [2023-08-30 02:08:37,230 INFO L131 PetriNetUnfolder]: For 17762/17762 co-relation queries the response was YES. [2023-08-30 02:08:37,276 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. [2023-08-30 02:08:37,295 INFO L137 encePairwiseOnDemand]: 779/796 looper letters, 195 selfloop transitions, 60 changer transitions 0/261 dead transitions. [2023-08-30 02:08:37,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 261 transitions, 2476 flow [2023-08-30 02:08:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:08:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:08:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4071 transitions. [2023-08-30 02:08:37,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36530868628858576 [2023-08-30 02:08:37,300 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4071 transitions. [2023-08-30 02:08:37,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4071 transitions. [2023-08-30 02:08:37,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:37,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4071 transitions. [2023-08-30 02:08:37,304 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) [2023-08-30 02:08:37,310 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) [2023-08-30 02:08:37,310 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) [2023-08-30 02:08:37,311 INFO L175 Difference]: Start difference. First operand has 193 places, 146 transitions, 1344 flow. Second operand 14 states and 4071 transitions. [2023-08-30 02:08:37,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 261 transitions, 2476 flow [2023-08-30 02:08:37,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 261 transitions, 2400 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-08-30 02:08:37,366 INFO L231 Difference]: Finished difference. Result has 199 places, 149 transitions, 1462 flow [2023-08-30 02:08:37,366 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} [2023-08-30 02:08:37,366 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 58 predicate places. [2023-08-30 02:08:37,366 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 149 transitions, 1462 flow [2023-08-30 02:08:37,367 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) [2023-08-30 02:08:37,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:37,367 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] [2023-08-30 02:08:37,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-30 02:08:37,367 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:37,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash -567327663, now seen corresponding path program 1 times [2023-08-30 02:08:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:37,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491931766] [2023-08-30 02:08:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:37,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:08:39,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491931766] [2023-08-30 02:08:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491931766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:39,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:39,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-08-30 02:08:39,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621163390] [2023-08-30 02:08:39,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:39,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 02:08:39,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 02:08:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-08-30 02:08:44,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 796 [2023-08-30 02:08:44,898 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) [2023-08-30 02:08:44,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:44,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 796 [2023-08-30 02:08:44,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:47,503 INFO L130 PetriNetUnfolder]: 4969/9549 cut-off events. [2023-08-30 02:08:47,503 INFO L131 PetriNetUnfolder]: For 25836/25836 co-relation queries the response was YES. [2023-08-30 02:08:47,567 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. [2023-08-30 02:08:47,592 INFO L137 encePairwiseOnDemand]: 779/796 looper letters, 238 selfloop transitions, 45 changer transitions 0/289 dead transitions. [2023-08-30 02:08:47,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 289 transitions, 2816 flow [2023-08-30 02:08:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:08:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:08:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3886 transitions. [2023-08-30 02:08:47,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3487078248384781 [2023-08-30 02:08:47,596 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3886 transitions. [2023-08-30 02:08:47,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3886 transitions. [2023-08-30 02:08:47,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:47,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3886 transitions. [2023-08-30 02:08:47,601 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) [2023-08-30 02:08:47,608 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) [2023-08-30 02:08:47,610 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) [2023-08-30 02:08:47,610 INFO L175 Difference]: Start difference. First operand has 199 places, 149 transitions, 1462 flow. Second operand 14 states and 3886 transitions. [2023-08-30 02:08:47,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 289 transitions, 2816 flow [2023-08-30 02:08:47,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 289 transitions, 2719 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-30 02:08:47,698 INFO L231 Difference]: Finished difference. Result has 207 places, 155 transitions, 1564 flow [2023-08-30 02:08:47,699 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} [2023-08-30 02:08:47,699 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 66 predicate places. [2023-08-30 02:08:47,699 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 155 transitions, 1564 flow [2023-08-30 02:08:47,700 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) [2023-08-30 02:08:47,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:47,700 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] [2023-08-30 02:08:47,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-30 02:08:47,700 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:47,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash -557461965, now seen corresponding path program 2 times [2023-08-30 02:08:47,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:47,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398481353] [2023-08-30 02:08:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:47,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:08:49,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:49,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398481353] [2023-08-30 02:08:49,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398481353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:49,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:49,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-30 02:08:49,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049224470] [2023-08-30 02:08:49,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:49,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 02:08:49,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:49,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 02:08:49,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-08-30 02:08:57,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 796 [2023-08-30 02:08:57,394 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) [2023-08-30 02:08:57,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:57,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 796 [2023-08-30 02:08:57,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:09:00,238 INFO L130 PetriNetUnfolder]: 5523/10649 cut-off events. [2023-08-30 02:09:00,238 INFO L131 PetriNetUnfolder]: For 26319/26319 co-relation queries the response was YES. [2023-08-30 02:09:00,325 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. [2023-08-30 02:09:00,353 INFO L137 encePairwiseOnDemand]: 780/796 looper letters, 225 selfloop transitions, 56 changer transitions 0/287 dead transitions. [2023-08-30 02:09:00,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 287 transitions, 2790 flow [2023-08-30 02:09:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:09:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:09:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4049 transitions. [2023-08-30 02:09:00,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36333452979181624 [2023-08-30 02:09:00,356 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4049 transitions. [2023-08-30 02:09:00,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4049 transitions. [2023-08-30 02:09:00,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:09:00,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4049 transitions. [2023-08-30 02:09:00,361 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) [2023-08-30 02:09:00,367 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) [2023-08-30 02:09:00,367 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) [2023-08-30 02:09:00,368 INFO L175 Difference]: Start difference. First operand has 207 places, 155 transitions, 1564 flow. Second operand 14 states and 4049 transitions. [2023-08-30 02:09:00,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 287 transitions, 2790 flow [2023-08-30 02:09:00,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 287 transitions, 2722 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-30 02:09:00,443 INFO L231 Difference]: Finished difference. Result has 214 places, 157 transitions, 1634 flow [2023-08-30 02:09:00,443 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} [2023-08-30 02:09:00,443 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, 73 predicate places. [2023-08-30 02:09:00,443 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 157 transitions, 1634 flow [2023-08-30 02:09:00,444 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) [2023-08-30 02:09:00,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:09:00,444 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] [2023-08-30 02:09:00,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-30 02:09:00,445 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:09:00,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:09:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash -730517279, now seen corresponding path program 3 times [2023-08-30 02:09:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:09:00,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740279319] [2023-08-30 02:09:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:09:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:09:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15