./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/queue_longest.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_longest.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 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 --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 02:06:16,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 02:06:16,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 02:06:16,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 02:06:16,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 02:06:16,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 02:06:16,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 02:06:16,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 02:06:16,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 02:06:16,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 02:06:16,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 02:06:16,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 02:06:16,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 02:06:16,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 02:06:16,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 02:06:16,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 02:06:16,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 02:06:16,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 02:06:16,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 02:06:16,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 02:06:16,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 02:06:16,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 02:06:16,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 02:06:16,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 02:06:16,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 02:06:16,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 02:06:16,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 02:06:16,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 02:06:16,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 02:06:16,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 02:06:16,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 02:06:16,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 02:06:16,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 02:06:16,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 02:06:16,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 02:06:16,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 02:06:16,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 02:06:16,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 02:06:16,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 02:06:16,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 02:06:16,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 02:06:16,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 02:06:16,976 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 02:06:16,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 02:06:16,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 02:06:16,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 02:06:16,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 02:06:16,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 02:06:16,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 02:06:16,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 02:06:16,980 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 02:06:16,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 02:06:16,981 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 02:06:16,981 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 02:06:16,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 02:06:16,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 02:06:16,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 02:06:16,982 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 02:06:16,982 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 02:06:16,982 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 02:06:16,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 02:06:16,983 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 02:06:16,983 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 02:06:16,983 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 02:06:16,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 02:06:16,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 02:06:16,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 02:06:16,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:06:16,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 02:06:16,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 02:06:16,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 02:06:16,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 02:06:16,985 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 02:06:16,986 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 02:06:16,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 02:06:16,986 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 02:06:16,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 02:06:17,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 02:06:17,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 02:06:17,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 02:06:17,336 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 02:06:17,337 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 02:06:17,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_longest.i [2023-08-30 02:06:18,413 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 02:06:18,680 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 02:06:18,680 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i [2023-08-30 02:06:18,694 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6259936a3/55e5c40f6e384763a8128676fc2c4a5f/FLAGdf3851b8b [2023-08-30 02:06:18,711 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6259936a3/55e5c40f6e384763a8128676fc2c4a5f [2023-08-30 02:06:18,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 02:06:18,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 02:06:18,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 02:06:18,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 02:06:18,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 02:06:18,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:06:18" (1/1) ... [2023-08-30 02:06:18,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69619b0b 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 02:06:18,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 02:06:18" (1/1) ... [2023-08-30 02:06:18,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 02:06:18,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 02:06:19,264 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_longest.i[43296,43309] [2023-08-30 02:06:19,273 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_longest.i[43503,43516] [2023-08-30 02:06:19,278 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_longest.i[43783,43796] [2023-08-30 02:06:19,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:06:19,299 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 02:06:19,358 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_longest.i[43296,43309] [2023-08-30 02:06:19,361 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_longest.i[43503,43516] [2023-08-30 02:06:19,364 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_longest.i[43783,43796] [2023-08-30 02:06:19,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 02:06:19,473 INFO L208 MainTranslator]: Completed translation [2023-08-30 02:06:19,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 02:06:19 WrapperNode [2023-08-30 02:06:19,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 02:06:19,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 02:06:19,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 02:06:19,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 02:06:19,481 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 02:06:19,515 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 02:06:19,555 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2023-08-30 02:06:19,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 02:06:19,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 02:06:19,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 02:06:19,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 02:06:19,566 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 02:06:19,566 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 02:06:19,583 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 02:06:19,588 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 02:06:19,596 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 02:06:19,607 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 02:06:19,614 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 02:06:19,616 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 02:06:19,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 02:06:19,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 02:06:19,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 02:06:19,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 02:06:19,629 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 02:06:19,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 02:06:19,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:06:19,663 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 02:06:19,692 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 02:06:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 02:06:19,705 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 02:06:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 02:06:19,705 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 02:06:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 02:06:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 02:06:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 02:06:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 02:06:19,706 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 02:06:19,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 02:06:19,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 02:06:19,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 02:06:19,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 02:06:19,708 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 02:06:19,924 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 02:06:19,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 02:06:20,404 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 02:06:20,414 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 02:06:20,414 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 02:06:20,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 02:06:20 BoogieIcfgContainer [2023-08-30 02:06:20,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 02:06:20,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 02:06:20,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 02:06:20,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 02:06:20,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 02:06:18" (1/3) ... [2023-08-30 02:06:20,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1585de6d 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 02:06:20,422 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 02:06:20,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1585de6d 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 02:06:20,423 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 02:06:20,424 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2023-08-30 02:06:20,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 02:06:20,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-08-30 02:06:20,438 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 02:06:20,606 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 02:06:20,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 338 transitions, 692 flow [2023-08-30 02:06:20,788 INFO L130 PetriNetUnfolder]: 15/336 cut-off events. [2023-08-30 02:06:20,788 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:06:20,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 336 events. 15/336 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 755 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 245. Up to 2 conditions per place. [2023-08-30 02:06:20,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 338 transitions, 692 flow [2023-08-30 02:06:20,806 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 332 transitions, 676 flow [2023-08-30 02:06:20,810 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 02:06:20,817 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-30 02:06:20,819 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-30 02:06:20,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 324 places, 332 transitions, 676 flow [2023-08-30 02:06:20,887 INFO L130 PetriNetUnfolder]: 15/332 cut-off events. [2023-08-30 02:06:20,887 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 02:06:20,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 332 events. 15/332 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 741 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 245. Up to 2 conditions per place. [2023-08-30 02:06:20,902 INFO L119 LiptonReduction]: Number of co-enabled transitions 28780 [2023-08-30 02:06:33,886 INFO L134 LiptonReduction]: Checked pairs total: 105796 [2023-08-30 02:06:33,887 INFO L136 LiptonReduction]: Total number of compositions: 415 [2023-08-30 02:06:33,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 02:06:33,904 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;@26a68f51, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 02:06:33,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-08-30 02:06:33,906 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 02:06:33,906 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 02:06:33,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:33,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 02:06:33,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:33,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1407, now seen corresponding path program 1 times [2023-08-30 02:06:33,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:33,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299154671] [2023-08-30 02:06:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:33,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:34,033 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 02:06:34,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:34,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299154671] [2023-08-30 02:06:34,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299154671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:34,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:34,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 02:06:34,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529995838] [2023-08-30 02:06:34,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:34,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 02:06:34,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 02:06:34,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 02:06:34,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 753 [2023-08-30 02:06:34,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 142 transitions, 296 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:06:34,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:34,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 753 [2023-08-30 02:06:34,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:35,215 INFO L130 PetriNetUnfolder]: 7123/11650 cut-off events. [2023-08-30 02:06:35,215 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-30 02:06:35,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22548 conditions, 11650 events. 7123/11650 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 70134 event pairs, 6167 based on Foata normal form. 88/6498 useless extension candidates. Maximal degree in co-relation 22160. Up to 10787 conditions per place. [2023-08-30 02:06:35,290 INFO L137 encePairwiseOnDemand]: 704/753 looper letters, 82 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2023-08-30 02:06:35,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 362 flow [2023-08-30 02:06:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 02:06:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 02:06:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 781 transitions. [2023-08-30 02:06:35,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185922974767596 [2023-08-30 02:06:35,310 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 781 transitions. [2023-08-30 02:06:35,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 781 transitions. [2023-08-30 02:06:35,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:35,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 781 transitions. [2023-08-30 02:06:35,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 390.5) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states 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 02:06:35,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 753.0) internal successors, (2259), 3 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states 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 02:06:35,331 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 753.0) internal successors, (2259), 3 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states 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 02:06:35,333 INFO L175 Difference]: Start difference. First operand has 139 places, 142 transitions, 296 flow. Second operand 2 states and 781 transitions. [2023-08-30 02:06:35,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 362 flow [2023-08-30 02:06:35,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 02:06:35,344 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 190 flow [2023-08-30 02:06:35,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2023-08-30 02:06:35,349 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2023-08-30 02:06:35,350 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 190 flow [2023-08-30 02:06:35,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:06:35,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:35,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:35,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 02:06:35,352 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:35,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1397048, now seen corresponding path program 1 times [2023-08-30 02:06:35,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:35,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797641974] [2023-08-30 02:06:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:35,623 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 02:06:35,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:35,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797641974] [2023-08-30 02:06:35,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797641974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:35,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:35,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:35,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486246800] [2023-08-30 02:06:35,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:35,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:35,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:35,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 753 [2023-08-30 02:06:35,789 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 02:06:35,789 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:35,789 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 753 [2023-08-30 02:06:35,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:36,679 INFO L130 PetriNetUnfolder]: 6353/10400 cut-off events. [2023-08-30 02:06:36,679 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 02:06:36,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20043 conditions, 10400 events. 6353/10400 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 61482 event pairs, 5453 based on Foata normal form. 0/5972 useless extension candidates. Maximal degree in co-relation 20040. Up to 9599 conditions per place. [2023-08-30 02:06:36,738 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 76 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-30 02:06:36,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 89 transitions, 338 flow [2023-08-30 02:06:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-30 02:06:36,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639220894200974 [2023-08-30 02:06:36,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-30 02:06:36,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-30 02:06:36,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:36,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-30 02:06:36,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states 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 02:06:36,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:36,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:36,753 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 190 flow. Second operand 3 states and 1048 transitions. [2023-08-30 02:06:36,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 89 transitions, 338 flow [2023-08-30 02:06:36,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:06:36,757 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 186 flow [2023-08-30 02:06:36,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2023-08-30 02:06:36,758 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -52 predicate places. [2023-08-30 02:06:36,758 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 186 flow [2023-08-30 02:06:36,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 02:06:36,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:36,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:36,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 02:06:36,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:36,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:36,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1397046, now seen corresponding path program 1 times [2023-08-30 02:06:36,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:36,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344360397] [2023-08-30 02:06:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:36,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:36,973 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 02:06:36,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:36,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344360397] [2023-08-30 02:06:36,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344360397] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:36,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:36,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:36,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590978528] [2023-08-30 02:06:36,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:36,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:36,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:37,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 753 [2023-08-30 02:06:37,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 02:06:37,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:37,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 753 [2023-08-30 02:06:37,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:37,900 INFO L130 PetriNetUnfolder]: 5480/8975 cut-off events. [2023-08-30 02:06:37,900 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 02:06:37,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17272 conditions, 8975 events. 5480/8975 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 51571 event pairs, 4648 based on Foata normal form. 0/5447 useless extension candidates. Maximal degree in co-relation 17268. Up to 8255 conditions per place. [2023-08-30 02:06:37,945 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 72 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-30 02:06:37,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 322 flow [2023-08-30 02:06:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-08-30 02:06:37,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46215139442231074 [2023-08-30 02:06:37,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-08-30 02:06:37,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-08-30 02:06:37,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:37,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-08-30 02:06:37,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states 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 02:06:37,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:37,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:37,959 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 186 flow. Second operand 3 states and 1044 transitions. [2023-08-30 02:06:37,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 322 flow [2023-08-30 02:06:37,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:37,963 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 174 flow [2023-08-30 02:06:37,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2023-08-30 02:06:37,964 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-30 02:06:37,965 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 174 flow [2023-08-30 02:06:37,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.0) internal successors, (969), 3 states have internal predecessors, (969), 0 states have call successors, (0), 0 states 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 02:06:37,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:37,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:37,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 02:06:37,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:37,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1396972, now seen corresponding path program 1 times [2023-08-30 02:06:37,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:37,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709190178] [2023-08-30 02:06:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:37,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:38,031 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 02:06:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709190178] [2023-08-30 02:06:38,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709190178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:38,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:38,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:38,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531542027] [2023-08-30 02:06:38,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:38,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:38,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-30 02:06:38,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 02:06:38,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:38,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-30 02:06:38,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:38,840 INFO L130 PetriNetUnfolder]: 5420/8856 cut-off events. [2023-08-30 02:06:38,840 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 02:06:38,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17039 conditions, 8856 events. 5420/8856 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 50619 event pairs, 4596 based on Foata normal form. 0/5402 useless extension candidates. Maximal degree in co-relation 17035. Up to 8141 conditions per place. [2023-08-30 02:06:38,883 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 69 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-30 02:06:38,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 312 flow [2023-08-30 02:06:38,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-30 02:06:38,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-30 02:06:38,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-30 02:06:38,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-30 02:06:38,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:38,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-30 02:06:38,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 02:06:38,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:38,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:38,896 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 174 flow. Second operand 3 states and 1021 transitions. [2023-08-30 02:06:38,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 312 flow [2023-08-30 02:06:38,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:06:38,898 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2023-08-30 02:06:38,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, 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=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-08-30 02:06:38,899 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2023-08-30 02:06:38,899 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2023-08-30 02:06:38,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 02:06:38,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:38,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 02:06:38,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 02:06:38,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:38,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:38,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1396973, now seen corresponding path program 1 times [2023-08-30 02:06:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:38,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445670482] [2023-08-30 02:06:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:38,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:38,959 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 02:06:38,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:38,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445670482] [2023-08-30 02:06:38,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445670482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:38,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:38,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 02:06:38,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054738516] [2023-08-30 02:06:38,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:38,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:38,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:38,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:38,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:39,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-30 02:06:39,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states 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 02:06:39,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:39,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-30 02:06:39,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:39,845 INFO L130 PetriNetUnfolder]: 5360/8737 cut-off events. [2023-08-30 02:06:39,845 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 02:06:39,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16809 conditions, 8737 events. 5360/8737 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 49680 event pairs, 4544 based on Foata normal form. 0/5357 useless extension candidates. Maximal degree in co-relation 16805. Up to 8028 conditions per place. [2023-08-30 02:06:39,884 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 67 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-30 02:06:39,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 307 flow [2023-08-30 02:06:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-30 02:06:39,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563966356795042 [2023-08-30 02:06:39,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-30 02:06:39,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-30 02:06:39,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:39,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-30 02:06:39,891 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 02:06:39,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:39,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:39,897 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 3 states and 1031 transitions. [2023-08-30 02:06:39,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 307 flow [2023-08-30 02:06:39,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:39,902 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 169 flow [2023-08-30 02:06:39,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-08-30 02:06:39,904 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2023-08-30 02:06:39,904 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 169 flow [2023-08-30 02:06:39,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states 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 02:06:39,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:39,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 02:06:39,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 02:06:39,906 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 02:06:39,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash 43308809, now seen corresponding path program 1 times [2023-08-30 02:06:39,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:39,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787130684] [2023-08-30 02:06:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:39,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:40,349 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 02:06:40,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:40,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787130684] [2023-08-30 02:06:40,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787130684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:40,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:40,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:40,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048226856] [2023-08-30 02:06:40,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:40,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:40,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 753 [2023-08-30 02:06:40,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 02:06:40,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:40,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 753 [2023-08-30 02:06:40,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:41,247 INFO L130 PetriNetUnfolder]: 5645/9113 cut-off events. [2023-08-30 02:06:41,248 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 02:06:41,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17623 conditions, 9113 events. 5645/9113 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 51051 event pairs, 4618 based on Foata normal form. 0/5451 useless extension candidates. Maximal degree in co-relation 17619. Up to 8462 conditions per place. [2023-08-30 02:06:41,296 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 71 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-08-30 02:06:41,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 335 flow [2023-08-30 02:06:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:06:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:06:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1298 transitions. [2023-08-30 02:06:41,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309428950863214 [2023-08-30 02:06:41,301 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1298 transitions. [2023-08-30 02:06:41,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1298 transitions. [2023-08-30 02:06:41,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:41,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1298 transitions. [2023-08-30 02:06:41,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.5) internal successors, (1298), 4 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states 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 02:06:41,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:41,310 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:41,310 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 169 flow. Second operand 4 states and 1298 transitions. [2023-08-30 02:06:41,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 335 flow [2023-08-30 02:06:41,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:41,313 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 204 flow [2023-08-30 02:06:41,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2023-08-30 02:06:41,314 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-30 02:06:41,314 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 204 flow [2023-08-30 02:06:41,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 02:06:41,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:41,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:41,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 02:06:41,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:41,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1342574226, now seen corresponding path program 1 times [2023-08-30 02:06:41,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:41,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698982712] [2023-08-30 02:06:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:41,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:41,454 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 02:06:41,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:41,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698982712] [2023-08-30 02:06:41,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698982712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:41,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:41,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:06:41,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143615128] [2023-08-30 02:06:41,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:41,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:06:41,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:41,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:06:41,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:06:41,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 753 [2023-08-30 02:06:41,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states 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 02:06:41,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:41,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 753 [2023-08-30 02:06:41,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:42,369 INFO L130 PetriNetUnfolder]: 4666/7530 cut-off events. [2023-08-30 02:06:42,370 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-08-30 02:06:42,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14881 conditions, 7530 events. 4666/7530 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 41926 event pairs, 54 based on Foata normal form. 156/4886 useless extension candidates. Maximal degree in co-relation 14875. Up to 6684 conditions per place. [2023-08-30 02:06:42,412 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 112 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-08-30 02:06:42,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 526 flow [2023-08-30 02:06:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 02:06:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 02:06:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1629 transitions. [2023-08-30 02:06:42,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43266932270916336 [2023-08-30 02:06:42,417 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1629 transitions. [2023-08-30 02:06:42,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1629 transitions. [2023-08-30 02:06:42,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:42,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1629 transitions. [2023-08-30 02:06:42,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.8) internal successors, (1629), 5 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states 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 02:06:42,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 753.0) internal successors, (4518), 6 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states 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 02:06:42,426 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 753.0) internal successors, (4518), 6 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states 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 02:06:42,427 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 204 flow. Second operand 5 states and 1629 transitions. [2023-08-30 02:06:42,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 526 flow [2023-08-30 02:06:42,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 02:06:42,431 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 199 flow [2023-08-30 02:06:42,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-08-30 02:06:42,432 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-30 02:06:42,432 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 199 flow [2023-08-30 02:06:42,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 303.0) internal successors, (1515), 5 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states 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 02:06:42,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:42,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:42,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 02:06:42,434 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:42,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:42,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1342534681, now seen corresponding path program 1 times [2023-08-30 02:06:42,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:42,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343073482] [2023-08-30 02:06:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:42,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:43,263 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 02:06:43,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:43,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343073482] [2023-08-30 02:06:43,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343073482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:43,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:43,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:06:43,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452901853] [2023-08-30 02:06:43,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:43,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:06:43,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:06:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:06:45,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 753 [2023-08-30 02:06:45,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 02:06:45,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:45,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 753 [2023-08-30 02:06:45,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:46,937 INFO L130 PetriNetUnfolder]: 5515/8889 cut-off events. [2023-08-30 02:06:46,937 INFO L131 PetriNetUnfolder]: For 932/932 co-relation queries the response was YES. [2023-08-30 02:06:46,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17997 conditions, 8889 events. 5515/8889 cut-off events. For 932/932 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 49899 event pairs, 1238 based on Foata normal form. 41/5721 useless extension candidates. Maximal degree in co-relation 17990. Up to 7665 conditions per place. [2023-08-30 02:06:46,986 INFO L137 encePairwiseOnDemand]: 746/753 looper letters, 98 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2023-08-30 02:06:46,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 511 flow [2023-08-30 02:06:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:06:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:06:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1324 transitions. [2023-08-30 02:06:46,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395750332005312 [2023-08-30 02:06:46,990 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1324 transitions. [2023-08-30 02:06:46,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1324 transitions. [2023-08-30 02:06:46,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:46,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1324 transitions. [2023-08-30 02:06:46,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states 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 02:06:46,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:46,998 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:46,998 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 199 flow. Second operand 4 states and 1324 transitions. [2023-08-30 02:06:46,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 511 flow [2023-08-30 02:06:47,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 118 transitions, 498 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:06:47,002 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 257 flow [2023-08-30 02:06:47,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2023-08-30 02:06:47,003 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-30 02:06:47,004 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 257 flow [2023-08-30 02:06:47,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 02:06:47,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:47,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:47,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 02:06:47,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:47,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:47,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523318, now seen corresponding path program 1 times [2023-08-30 02:06:47,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:47,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960421338] [2023-08-30 02:06:47,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:47,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:47,090 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 02:06:47,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:47,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960421338] [2023-08-30 02:06:47,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960421338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:47,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:47,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:47,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657120123] [2023-08-30 02:06:47,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:47,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:47,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:47,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 753 [2023-08-30 02:06:47,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states 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 02:06:47,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:47,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 753 [2023-08-30 02:06:47,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:47,712 INFO L130 PetriNetUnfolder]: 3815/6378 cut-off events. [2023-08-30 02:06:47,712 INFO L131 PetriNetUnfolder]: For 690/690 co-relation queries the response was YES. [2023-08-30 02:06:47,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13164 conditions, 6378 events. 3815/6378 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 35230 event pairs, 3058 based on Foata normal form. 0/4339 useless extension candidates. Maximal degree in co-relation 13155. Up to 5822 conditions per place. [2023-08-30 02:06:47,740 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 70 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-30 02:06:47,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 399 flow [2023-08-30 02:06:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-30 02:06:47,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45108455068614434 [2023-08-30 02:06:47,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-30 02:06:47,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-30 02:06:47,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:47,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-30 02:06:47,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states 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 02:06:47,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:47,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:47,751 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 257 flow. Second operand 3 states and 1019 transitions. [2023-08-30 02:06:47,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 399 flow [2023-08-30 02:06:47,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 86 transitions, 397 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 02:06:47,755 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 257 flow [2023-08-30 02:06:47,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=83, 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=257, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2023-08-30 02:06:47,755 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-30 02:06:47,756 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 257 flow [2023-08-30 02:06:47,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states 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 02:06:47,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:47,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:47,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 02:06:47,757 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:47,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:47,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523317, now seen corresponding path program 1 times [2023-08-30 02:06:47,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:47,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039001494] [2023-08-30 02:06:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:47,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:47,808 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 02:06:47,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:47,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039001494] [2023-08-30 02:06:47,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039001494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:47,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:47,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278555616] [2023-08-30 02:06:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:47,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:47,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:47,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:48,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 753 [2023-08-30 02:06:48,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 02:06:48,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:48,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 753 [2023-08-30 02:06:48,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:48,342 INFO L130 PetriNetUnfolder]: 2361/4108 cut-off events. [2023-08-30 02:06:48,342 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2023-08-30 02:06:48,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8489 conditions, 4108 events. 2361/4108 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 21884 event pairs, 1841 based on Foata normal form. 0/3179 useless extension candidates. Maximal degree in co-relation 8479. Up to 3732 conditions per place. [2023-08-30 02:06:48,363 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 69 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-30 02:06:48,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 85 transitions, 397 flow [2023-08-30 02:06:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1000 transitions. [2023-08-30 02:06:48,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426737494466578 [2023-08-30 02:06:48,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1000 transitions. [2023-08-30 02:06:48,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1000 transitions. [2023-08-30 02:06:48,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:48,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1000 transitions. [2023-08-30 02:06:48,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 333.3333333333333) internal successors, (1000), 3 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states 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 02:06:48,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:48,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:48,374 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 257 flow. Second operand 3 states and 1000 transitions. [2023-08-30 02:06:48,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 85 transitions, 397 flow [2023-08-30 02:06:48,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:48,377 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 255 flow [2023-08-30 02:06:48,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2023-08-30 02:06:48,378 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-30 02:06:48,378 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 255 flow [2023-08-30 02:06:48,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states 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 02:06:48,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:48,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 02:06:48,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 02:06:48,379 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 02:06:48,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:48,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1342575601, now seen corresponding path program 2 times [2023-08-30 02:06:48,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:48,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032584939] [2023-08-30 02:06:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:48,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:49,102 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 02:06:49,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:49,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032584939] [2023-08-30 02:06:49,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032584939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:49,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:49,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:06:49,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316454332] [2023-08-30 02:06:49,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:49,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:06:49,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:06:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:06:50,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 753 [2023-08-30 02:06:50,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 02:06:50,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:50,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 753 [2023-08-30 02:06:50,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:51,706 INFO L130 PetriNetUnfolder]: 2440/4159 cut-off events. [2023-08-30 02:06:51,706 INFO L131 PetriNetUnfolder]: For 599/599 co-relation queries the response was YES. [2023-08-30 02:06:51,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8761 conditions, 4159 events. 2440/4159 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 21706 event pairs, 602 based on Foata normal form. 21/3249 useless extension candidates. Maximal degree in co-relation 8751. Up to 3621 conditions per place. [2023-08-30 02:06:51,719 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 91 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2023-08-30 02:06:51,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 112 transitions, 524 flow [2023-08-30 02:06:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:06:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:06:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1315 transitions. [2023-08-30 02:06:51,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658698539176627 [2023-08-30 02:06:51,723 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1315 transitions. [2023-08-30 02:06:51,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1315 transitions. [2023-08-30 02:06:51,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:51,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1315 transitions. [2023-08-30 02:06:51,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 328.75) internal successors, (1315), 4 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states 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 02:06:51,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:51,731 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:51,731 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 255 flow. Second operand 4 states and 1315 transitions. [2023-08-30 02:06:51,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 112 transitions, 524 flow [2023-08-30 02:06:51,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 112 transitions, 518 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:51,736 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 294 flow [2023-08-30 02:06:51,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2023-08-30 02:06:51,736 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -53 predicate places. [2023-08-30 02:06:51,737 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 294 flow [2023-08-30 02:06:51,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states 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 02:06:51,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:51,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:51,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 02:06:51,738 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 02:06:51,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:51,738 INFO L85 PathProgramCache]: Analyzing trace with hash 379604633, now seen corresponding path program 1 times [2023-08-30 02:06:51,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:51,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597091789] [2023-08-30 02:06:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:51,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:51,780 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 02:06:51,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:51,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597091789] [2023-08-30 02:06:51,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597091789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:51,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:51,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:51,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977210925] [2023-08-30 02:06:51,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:51,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:51,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:51,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-30 02:06:51,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 02:06:51,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:51,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-30 02:06:51,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:52,061 INFO L130 PetriNetUnfolder]: 1607/2797 cut-off events. [2023-08-30 02:06:52,061 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2023-08-30 02:06:52,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2797 events. 1607/2797 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12135 event pairs, 778 based on Foata normal form. 66/2213 useless extension candidates. Maximal degree in co-relation 5656. Up to 1688 conditions per place. [2023-08-30 02:06:52,072 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 91 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2023-08-30 02:06:52,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 478 flow [2023-08-30 02:06:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-08-30 02:06:52,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46569278441788403 [2023-08-30 02:06:52,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-08-30 02:06:52,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-08-30 02:06:52,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:52,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-08-30 02:06:52,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states 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 02:06:52,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:52,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:52,083 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 294 flow. Second operand 3 states and 1052 transitions. [2023-08-30 02:06:52,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 478 flow [2023-08-30 02:06:52,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 106 transitions, 443 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-30 02:06:52,087 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 209 flow [2023-08-30 02:06:52,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2023-08-30 02:06:52,088 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2023-08-30 02:06:52,088 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 209 flow [2023-08-30 02:06:52,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 02:06:52,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:52,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:52,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 02:06:52,089 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:52,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:52,090 INFO L85 PathProgramCache]: Analyzing trace with hash 236453581, now seen corresponding path program 1 times [2023-08-30 02:06:52,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:52,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284685687] [2023-08-30 02:06:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:52,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:53,258 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 02:06:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:53,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284685687] [2023-08-30 02:06:53,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284685687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:53,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:53,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 02:06:53,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241714654] [2023-08-30 02:06:53,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:53,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 02:06:53,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 02:06:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-30 02:06:55,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 753 [2023-08-30 02:06:55,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 209 flow. Second operand has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states 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 02:06:55,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:55,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 753 [2023-08-30 02:06:55,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:57,146 INFO L130 PetriNetUnfolder]: 1662/2938 cut-off events. [2023-08-30 02:06:57,146 INFO L131 PetriNetUnfolder]: For 187/187 co-relation queries the response was YES. [2023-08-30 02:06:57,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5906 conditions, 2938 events. 1662/2938 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 13032 event pairs, 1270 based on Foata normal form. 0/2267 useless extension candidates. Maximal degree in co-relation 5898. Up to 2690 conditions per place. [2023-08-30 02:06:57,154 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 67 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2023-08-30 02:06:57,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 393 flow [2023-08-30 02:06:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:06:57,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:06:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2171 transitions. [2023-08-30 02:06:57,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118763043065832 [2023-08-30 02:06:57,160 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2171 transitions. [2023-08-30 02:06:57,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2171 transitions. [2023-08-30 02:06:57,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:57,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2171 transitions. [2023-08-30 02:06:57,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 310.14285714285717) internal successors, (2171), 7 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states 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 02:06:57,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 02:06:57,172 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 02:06:57,172 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 209 flow. Second operand 7 states and 2171 transitions. [2023-08-30 02:06:57,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 393 flow [2023-08-30 02:06:57,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:06:57,175 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 269 flow [2023-08-30 02:06:57,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=269, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2023-08-30 02:06:57,175 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2023-08-30 02:06:57,175 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 269 flow [2023-08-30 02:06:57,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 300.6666666666667) internal successors, (1804), 6 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states 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 02:06:57,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:57,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:57,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-30 02:06:57,176 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 02:06:57,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash 138579933, now seen corresponding path program 1 times [2023-08-30 02:06:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:57,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597934579] [2023-08-30 02:06:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:57,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:57,311 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 02:06:57,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:57,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597934579] [2023-08-30 02:06:57,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597934579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:57,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:57,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:57,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331088285] [2023-08-30 02:06:57,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:57,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:57,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:57,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:57,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:57,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-30 02:06:57,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 02:06:57,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:57,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-30 02:06:57,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:57,816 INFO L130 PetriNetUnfolder]: 1548/2769 cut-off events. [2023-08-30 02:06:57,816 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-30 02:06:57,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5625 conditions, 2769 events. 1548/2769 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12367 event pairs, 1180 based on Foata normal form. 0/2133 useless extension candidates. Maximal degree in co-relation 5614. Up to 2508 conditions per place. [2023-08-30 02:06:57,828 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 68 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-30 02:06:57,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 84 transitions, 407 flow [2023-08-30 02:06:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:06:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:06:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1342 transitions. [2023-08-30 02:06:57,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455511288180611 [2023-08-30 02:06:57,833 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1342 transitions. [2023-08-30 02:06:57,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1342 transitions. [2023-08-30 02:06:57,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:57,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1342 transitions. [2023-08-30 02:06:57,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 335.5) internal successors, (1342), 4 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states 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 02:06:57,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:57,840 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:06:57,841 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 269 flow. Second operand 4 states and 1342 transitions. [2023-08-30 02:06:57,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 84 transitions, 407 flow [2023-08-30 02:06:57,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 389 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 02:06:57,843 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 253 flow [2023-08-30 02:06:57,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-08-30 02:06:57,844 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -51 predicate places. [2023-08-30 02:06:57,845 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 253 flow [2023-08-30 02:06:57,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.5) internal successors, (1290), 4 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states 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 02:06:57,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:57,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:57,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 02:06:57,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:57,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:57,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1454248524, now seen corresponding path program 1 times [2023-08-30 02:06:57,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:57,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974796304] [2023-08-30 02:06:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:57,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:57,934 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 02:06:57,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:57,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974796304] [2023-08-30 02:06:57,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974796304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:57,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:57,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:06:57,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139881918] [2023-08-30 02:06:57,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:57,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:06:57,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:57,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:06:57,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:06:58,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 753 [2023-08-30 02:06:58,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 312.5) internal successors, (1250), 4 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states 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 02:06:58,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:58,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 753 [2023-08-30 02:06:58,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:58,467 INFO L130 PetriNetUnfolder]: 1454/2575 cut-off events. [2023-08-30 02:06:58,467 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-30 02:06:58,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 2575 events. 1454/2575 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11157 event pairs, 1101 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 5211. Up to 2352 conditions per place. [2023-08-30 02:06:58,475 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 66 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-30 02:06:58,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 81 transitions, 383 flow [2023-08-30 02:06:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 992 transitions. [2023-08-30 02:06:58,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43913235945108453 [2023-08-30 02:06:58,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 992 transitions. [2023-08-30 02:06:58,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 992 transitions. [2023-08-30 02:06:58,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:58,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 992 transitions. [2023-08-30 02:06:58,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 02:06:58,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:58,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:58,486 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 253 flow. Second operand 3 states and 992 transitions. [2023-08-30 02:06:58,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 81 transitions, 383 flow [2023-08-30 02:06:58,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:58,488 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 248 flow [2023-08-30 02:06:58,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2023-08-30 02:06:58,489 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-30 02:06:58,489 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 248 flow [2023-08-30 02:06:58,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 312.5) internal successors, (1250), 4 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states 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 02:06:58,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:58,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:58,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-30 02:06:58,491 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:58,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1009501, now seen corresponding path program 1 times [2023-08-30 02:06:58,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:58,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683983432] [2023-08-30 02:06:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:58,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:58,528 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 02:06:58,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:58,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683983432] [2023-08-30 02:06:58,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683983432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:58,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:58,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:06:58,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522144311] [2023-08-30 02:06:58,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:58,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:06:58,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:58,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:06:58,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:06:58,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-30 02:06:58,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:06:58,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:06:58,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-30 02:06:58,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:06:58,825 INFO L130 PetriNetUnfolder]: 1444/2565 cut-off events. [2023-08-30 02:06:58,825 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-30 02:06:58,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5204 conditions, 2565 events. 1444/2565 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11142 event pairs, 1090 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 5193. Up to 2312 conditions per place. [2023-08-30 02:06:58,833 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 70 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-30 02:06:58,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 411 flow [2023-08-30 02:06:58,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:06:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:06:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1026 transitions. [2023-08-30 02:06:58,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541832669322709 [2023-08-30 02:06:58,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1026 transitions. [2023-08-30 02:06:58,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1026 transitions. [2023-08-30 02:06:58,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:06:58,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1026 transitions. [2023-08-30 02:06:58,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states 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 02:06:58,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:58,843 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:06:58,843 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 248 flow. Second operand 3 states and 1026 transitions. [2023-08-30 02:06:58,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 411 flow [2023-08-30 02:06:58,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:06:58,846 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 250 flow [2023-08-30 02:06:58,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2023-08-30 02:06:58,847 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-30 02:06:58,847 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 250 flow [2023-08-30 02:06:58,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 323.3333333333333) internal successors, (970), 3 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 02:06:58,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:06:58,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:06:58,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 02:06:58,848 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:06:58,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:06:58,848 INFO L85 PathProgramCache]: Analyzing trace with hash 972426745, now seen corresponding path program 1 times [2023-08-30 02:06:58,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:06:58,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951514063] [2023-08-30 02:06:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:06:58,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:06:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:06:59,249 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 02:06:59,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:06:59,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951514063] [2023-08-30 02:06:59,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951514063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:06:59,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:06:59,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:06:59,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045713711] [2023-08-30 02:06:59,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:06:59,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:06:59,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:06:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:06:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:07:00,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 753 [2023-08-30 02:07:00,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 296.85714285714283) internal successors, (2078), 7 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states 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 02:07:00,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:00,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 753 [2023-08-30 02:07:00,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:00,571 INFO L130 PetriNetUnfolder]: 1696/2963 cut-off events. [2023-08-30 02:07:00,571 INFO L131 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2023-08-30 02:07:00,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6142 conditions, 2963 events. 1696/2963 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12936 event pairs, 501 based on Foata normal form. 9/2420 useless extension candidates. Maximal degree in co-relation 6131. Up to 2427 conditions per place. [2023-08-30 02:07:00,581 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 91 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2023-08-30 02:07:00,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 563 flow [2023-08-30 02:07:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:07:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:07:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1873 transitions. [2023-08-30 02:07:00,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41456396635679504 [2023-08-30 02:07:00,589 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1873 transitions. [2023-08-30 02:07:00,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1873 transitions. [2023-08-30 02:07:00,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:00,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1873 transitions. [2023-08-30 02:07:00,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 312.1666666666667) internal successors, (1873), 6 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states 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 02:07:00,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 02:07:00,601 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 02:07:00,601 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 250 flow. Second operand 6 states and 1873 transitions. [2023-08-30 02:07:00,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 563 flow [2023-08-30 02:07:00,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 549 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:07:00,605 INFO L231 Difference]: Finished difference. Result has 92 places, 86 transitions, 336 flow [2023-08-30 02:07:00,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=92, PETRI_TRANSITIONS=86} [2023-08-30 02:07:00,606 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -47 predicate places. [2023-08-30 02:07:00,606 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 86 transitions, 336 flow [2023-08-30 02:07:00,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 296.85714285714283) internal successors, (2078), 7 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states 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 02:07:00,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:00,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:00,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 02:07:00,608 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 02:07:00,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:00,608 INFO L85 PathProgramCache]: Analyzing trace with hash -181419743, now seen corresponding path program 2 times [2023-08-30 02:07:00,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:00,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62302838] [2023-08-30 02:07:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:00,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:01,095 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 02:07:01,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:01,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62302838] [2023-08-30 02:07:01,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62302838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:01,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:01,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:07:01,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345790784] [2023-08-30 02:07:01,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:01,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:07:01,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:01,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:07:01,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:07:01,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 753 [2023-08-30 02:07:01,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 86 transitions, 336 flow. Second operand has 7 states, 7 states have (on average 296.85714285714283) internal successors, (2078), 7 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states 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 02:07:01,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:01,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 753 [2023-08-30 02:07:01,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:02,203 INFO L130 PetriNetUnfolder]: 1774/3099 cut-off events. [2023-08-30 02:07:02,203 INFO L131 PetriNetUnfolder]: For 453/453 co-relation queries the response was YES. [2023-08-30 02:07:02,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6676 conditions, 3099 events. 1774/3099 cut-off events. For 453/453 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 13734 event pairs, 493 based on Foata normal form. 9/2546 useless extension candidates. Maximal degree in co-relation 6661. Up to 2555 conditions per place. [2023-08-30 02:07:02,214 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 94 selfloop transitions, 19 changer transitions 0/122 dead transitions. [2023-08-30 02:07:02,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 653 flow [2023-08-30 02:07:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:07:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:07:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2167 transitions. [2023-08-30 02:07:02,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41111743502181747 [2023-08-30 02:07:02,220 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2167 transitions. [2023-08-30 02:07:02,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2167 transitions. [2023-08-30 02:07:02,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:02,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2167 transitions. [2023-08-30 02:07:02,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 309.57142857142856) internal successors, (2167), 7 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states 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 02:07:02,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 02:07:02,230 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 02:07:02,230 INFO L175 Difference]: Start difference. First operand has 92 places, 86 transitions, 336 flow. Second operand 7 states and 2167 transitions. [2023-08-30 02:07:02,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 653 flow [2023-08-30 02:07:02,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 647 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-30 02:07:02,235 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 406 flow [2023-08-30 02:07:02,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2023-08-30 02:07:02,235 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -39 predicate places. [2023-08-30 02:07:02,235 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 406 flow [2023-08-30 02:07:02,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 296.85714285714283) internal successors, (2078), 7 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states 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 02:07:02,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:02,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:02,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 02:07:02,237 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 02:07:02,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash -247492645, now seen corresponding path program 3 times [2023-08-30 02:07:02,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:02,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26008489] [2023-08-30 02:07:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:02,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:02,948 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 02:07:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:02,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26008489] [2023-08-30 02:07:02,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26008489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:02,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:02,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 02:07:02,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073599957] [2023-08-30 02:07:02,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:02,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:07:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:07:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:07:05,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 753 [2023-08-30 02:07:05,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 298.85714285714283) internal successors, (2092), 7 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states 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 02:07:05,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:05,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 753 [2023-08-30 02:07:05,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:06,576 INFO L130 PetriNetUnfolder]: 1730/3049 cut-off events. [2023-08-30 02:07:06,576 INFO L131 PetriNetUnfolder]: For 725/725 co-relation queries the response was YES. [2023-08-30 02:07:06,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6638 conditions, 3049 events. 1730/3049 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 13554 event pairs, 525 based on Foata normal form. 18/2513 useless extension candidates. Maximal degree in co-relation 6620. Up to 2277 conditions per place. [2023-08-30 02:07:06,586 INFO L137 encePairwiseOnDemand]: 746/753 looper letters, 88 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2023-08-30 02:07:06,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 668 flow [2023-08-30 02:07:06,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 02:07:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 02:07:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2173 transitions. [2023-08-30 02:07:06,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41225573894896606 [2023-08-30 02:07:06,591 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2173 transitions. [2023-08-30 02:07:06,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2173 transitions. [2023-08-30 02:07:06,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:06,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2173 transitions. [2023-08-30 02:07:06,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 310.42857142857144) internal successors, (2173), 7 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states 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 02:07:06,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 02:07:06,600 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states 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 02:07:06,600 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 406 flow. Second operand 7 states and 2173 transitions. [2023-08-30 02:07:06,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 668 flow [2023-08-30 02:07:06,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 116 transitions, 647 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-30 02:07:06,606 INFO L231 Difference]: Finished difference. Result has 102 places, 86 transitions, 406 flow [2023-08-30 02:07:06,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=102, PETRI_TRANSITIONS=86} [2023-08-30 02:07:06,607 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -37 predicate places. [2023-08-30 02:07:06,607 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 86 transitions, 406 flow [2023-08-30 02:07:06,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 298.85714285714283) internal successors, (2092), 7 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states 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 02:07:06,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:06,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:06,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-30 02:07:06,608 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 02:07:06,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:06,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1611999738, now seen corresponding path program 1 times [2023-08-30 02:07:06,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:06,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24086226] [2023-08-30 02:07:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:06,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:07,310 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 02:07:07,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:07,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24086226] [2023-08-30 02:07:07,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24086226] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:07,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:07,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 02:07:07,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832182423] [2023-08-30 02:07:07,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:07,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 02:07:07,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:07,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 02:07:07,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-30 02:07:08,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-30 02:07:08,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 86 transitions, 406 flow. Second operand has 10 states, 10 states have (on average 281.3) internal successors, (2813), 10 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 02:07:08,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:08,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-30 02:07:08,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:09,281 INFO L130 PetriNetUnfolder]: 1729/3050 cut-off events. [2023-08-30 02:07:09,281 INFO L131 PetriNetUnfolder]: For 975/975 co-relation queries the response was YES. [2023-08-30 02:07:09,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6692 conditions, 3050 events. 1729/3050 cut-off events. For 975/975 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 13557 event pairs, 1305 based on Foata normal form. 0/2483 useless extension candidates. Maximal degree in co-relation 6675. Up to 2807 conditions per place. [2023-08-30 02:07:09,290 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 78 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2023-08-30 02:07:09,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 104 transitions, 646 flow [2023-08-30 02:07:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 02:07:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 02:07:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2606 transitions. [2023-08-30 02:07:09,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845359303526634 [2023-08-30 02:07:09,295 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2606 transitions. [2023-08-30 02:07:09,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2606 transitions. [2023-08-30 02:07:09,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:09,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2606 transitions. [2023-08-30 02:07:09,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 289.55555555555554) internal successors, (2606), 9 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states 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 02:07:09,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:07:09,306 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:07:09,306 INFO L175 Difference]: Start difference. First operand has 102 places, 86 transitions, 406 flow. Second operand 9 states and 2606 transitions. [2023-08-30 02:07:09,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 104 transitions, 646 flow [2023-08-30 02:07:09,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 104 transitions, 608 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 02:07:09,311 INFO L231 Difference]: Finished difference. Result has 107 places, 93 transitions, 451 flow [2023-08-30 02:07:09,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=451, PETRI_PLACES=107, PETRI_TRANSITIONS=93} [2023-08-30 02:07:09,312 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -32 predicate places. [2023-08-30 02:07:09,312 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 93 transitions, 451 flow [2023-08-30 02:07:09,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 281.3) internal successors, (2813), 10 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states 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 02:07:09,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:09,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:09,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-30 02:07:09,313 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 02:07:09,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:09,314 INFO L85 PathProgramCache]: Analyzing trace with hash -580033310, now seen corresponding path program 1 times [2023-08-30 02:07:09,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:09,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406155774] [2023-08-30 02:07:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:09,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:10,080 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 02:07:10,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:10,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406155774] [2023-08-30 02:07:10,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406155774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:10,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:10,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 02:07:10,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930952144] [2023-08-30 02:07:10,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:10,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 02:07:10,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:10,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 02:07:10,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-30 02:07:12,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-30 02:07:12,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 93 transitions, 451 flow. Second operand has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 02:07:12,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:12,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-30 02:07:12,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:12,775 INFO L130 PetriNetUnfolder]: 1889/3315 cut-off events. [2023-08-30 02:07:12,776 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2023-08-30 02:07:12,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7304 conditions, 3315 events. 1889/3315 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 14980 event pairs, 546 based on Foata normal form. 0/2706 useless extension candidates. Maximal degree in co-relation 7284. Up to 2222 conditions per place. [2023-08-30 02:07:12,791 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 117 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2023-08-30 02:07:12,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 151 transitions, 867 flow [2023-08-30 02:07:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 02:07:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 02:07:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2644 transitions. [2023-08-30 02:07:12,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39014313117898775 [2023-08-30 02:07:12,795 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2644 transitions. [2023-08-30 02:07:12,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2644 transitions. [2023-08-30 02:07:12,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:12,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2644 transitions. [2023-08-30 02:07:12,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.77777777777777) internal successors, (2644), 9 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states 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 02:07:12,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:07:12,804 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:07:12,805 INFO L175 Difference]: Start difference. First operand has 107 places, 93 transitions, 451 flow. Second operand 9 states and 2644 transitions. [2023-08-30 02:07:12,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 151 transitions, 867 flow [2023-08-30 02:07:12,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 839 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-30 02:07:12,810 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 510 flow [2023-08-30 02:07:12,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=510, PETRI_PLACES=112, PETRI_TRANSITIONS=96} [2023-08-30 02:07:12,811 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -27 predicate places. [2023-08-30 02:07:12,811 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 510 flow [2023-08-30 02:07:12,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 02:07:12,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:12,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:12,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-30 02:07:12,812 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 02:07:12,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:12,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1567339102, now seen corresponding path program 2 times [2023-08-30 02:07:12,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:12,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647690802] [2023-08-30 02:07:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:12,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:13,518 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 02:07:13,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:13,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647690802] [2023-08-30 02:07:13,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647690802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:13,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:13,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 02:07:13,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608386228] [2023-08-30 02:07:13,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:13,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 02:07:13,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:13,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 02:07:13,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-30 02:07:15,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-30 02:07:15,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 96 transitions, 510 flow. Second operand has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 02:07:15,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:15,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-30 02:07:15,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:16,009 INFO L130 PetriNetUnfolder]: 1981/3481 cut-off events. [2023-08-30 02:07:16,009 INFO L131 PetriNetUnfolder]: For 1027/1027 co-relation queries the response was YES. [2023-08-30 02:07:16,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7908 conditions, 3481 events. 1981/3481 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 16097 event pairs, 652 based on Foata normal form. 0/2835 useless extension candidates. Maximal degree in co-relation 7886. Up to 2052 conditions per place. [2023-08-30 02:07:16,022 INFO L137 encePairwiseOnDemand]: 741/753 looper letters, 114 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2023-08-30 02:07:16,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 922 flow [2023-08-30 02:07:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:07:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:07:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2921 transitions. [2023-08-30 02:07:16,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38791500664010625 [2023-08-30 02:07:16,026 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2921 transitions. [2023-08-30 02:07:16,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2921 transitions. [2023-08-30 02:07:16,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:16,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2921 transitions. [2023-08-30 02:07:16,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 292.1) internal successors, (2921), 10 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states 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 02:07:16,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:07:16,035 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:07:16,035 INFO L175 Difference]: Start difference. First operand has 112 places, 96 transitions, 510 flow. Second operand 10 states and 2921 transitions. [2023-08-30 02:07:16,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 922 flow [2023-08-30 02:07:16,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 877 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-30 02:07:16,042 INFO L231 Difference]: Finished difference. Result has 117 places, 99 transitions, 567 flow [2023-08-30 02:07:16,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=567, PETRI_PLACES=117, PETRI_TRANSITIONS=99} [2023-08-30 02:07:16,042 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -22 predicate places. [2023-08-30 02:07:16,043 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 99 transitions, 567 flow [2023-08-30 02:07:16,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 02:07:16,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:16,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:16,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-30 02:07:16,044 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 02:07:16,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:16,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1567656232, now seen corresponding path program 3 times [2023-08-30 02:07:16,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:16,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494239167] [2023-08-30 02:07:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:16,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:17,297 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 02:07:17,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:17,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494239167] [2023-08-30 02:07:17,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494239167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:17,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:17,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-30 02:07:17,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582241741] [2023-08-30 02:07:17,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:17,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 02:07:17,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 02:07:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-30 02:07:20,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-30 02:07:20,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 99 transitions, 567 flow. Second operand has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 02:07:20,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:20,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-30 02:07:20,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:21,065 INFO L130 PetriNetUnfolder]: 1968/3458 cut-off events. [2023-08-30 02:07:21,065 INFO L131 PetriNetUnfolder]: For 1250/1250 co-relation queries the response was YES. [2023-08-30 02:07:21,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7957 conditions, 3458 events. 1968/3458 cut-off events. For 1250/1250 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 15985 event pairs, 655 based on Foata normal form. 0/2827 useless extension candidates. Maximal degree in co-relation 7933. Up to 2054 conditions per place. [2023-08-30 02:07:21,080 INFO L137 encePairwiseOnDemand]: 741/753 looper letters, 115 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2023-08-30 02:07:21,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 155 transitions, 979 flow [2023-08-30 02:07:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:07:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:07:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2926 transitions. [2023-08-30 02:07:21,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38857901726427624 [2023-08-30 02:07:21,084 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2926 transitions. [2023-08-30 02:07:21,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2926 transitions. [2023-08-30 02:07:21,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:21,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2926 transitions. [2023-08-30 02:07:21,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 292.6) internal successors, (2926), 10 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states 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 02:07:21,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:07:21,092 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:07:21,092 INFO L175 Difference]: Start difference. First operand has 117 places, 99 transitions, 567 flow. Second operand 10 states and 2926 transitions. [2023-08-30 02:07:21,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 155 transitions, 979 flow [2023-08-30 02:07:21,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 155 transitions, 945 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-30 02:07:21,100 INFO L231 Difference]: Finished difference. Result has 118 places, 97 transitions, 589 flow [2023-08-30 02:07:21,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=589, PETRI_PLACES=118, PETRI_TRANSITIONS=97} [2023-08-30 02:07:21,101 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -21 predicate places. [2023-08-30 02:07:21,101 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 97 transitions, 589 flow [2023-08-30 02:07:21,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 281.27272727272725) internal successors, (3094), 11 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states 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 02:07:21,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:21,102 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 02:07:21,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-30 02:07:21,102 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 02:07:21,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:21,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1027074210, now seen corresponding path program 1 times [2023-08-30 02:07:21,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:21,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794754485] [2023-08-30 02:07:21,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:21,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:21,797 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 02:07:21,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:21,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794754485] [2023-08-30 02:07:21,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794754485] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:21,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:21,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-30 02:07:21,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239008558] [2023-08-30 02:07:21,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:21,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 02:07:21,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 02:07:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-30 02:07:22,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-30 02:07:22,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 97 transitions, 589 flow. Second operand has 10 states, 10 states have (on average 268.7) internal successors, (2687), 10 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states 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 02:07:22,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:22,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-30 02:07:22,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:23,572 INFO L130 PetriNetUnfolder]: 2127/3742 cut-off events. [2023-08-30 02:07:23,572 INFO L131 PetriNetUnfolder]: For 1910/1910 co-relation queries the response was YES. [2023-08-30 02:07:23,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8814 conditions, 3742 events. 2127/3742 cut-off events. For 1910/1910 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17650 event pairs, 1474 based on Foata normal form. 0/3054 useless extension candidates. Maximal degree in co-relation 8790. Up to 3192 conditions per place. [2023-08-30 02:07:23,581 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 106 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2023-08-30 02:07:23,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 134 transitions, 974 flow [2023-08-30 02:07:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:07:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:07:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2777 transitions. [2023-08-30 02:07:23,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687915006640106 [2023-08-30 02:07:23,584 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2777 transitions. [2023-08-30 02:07:23,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2777 transitions. [2023-08-30 02:07:23,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:23,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2777 transitions. [2023-08-30 02:07:23,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 277.7) internal successors, (2777), 10 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states 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 02:07:23,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:07:23,591 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:07:23,591 INFO L175 Difference]: Start difference. First operand has 118 places, 97 transitions, 589 flow. Second operand 10 states and 2777 transitions. [2023-08-30 02:07:23,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 134 transitions, 974 flow [2023-08-30 02:07:23,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 134 transitions, 900 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-30 02:07:23,600 INFO L231 Difference]: Finished difference. Result has 121 places, 101 transitions, 622 flow [2023-08-30 02:07:23,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=622, PETRI_PLACES=121, PETRI_TRANSITIONS=101} [2023-08-30 02:07:23,600 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -18 predicate places. [2023-08-30 02:07:23,600 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 101 transitions, 622 flow [2023-08-30 02:07:23,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 268.7) internal successors, (2687), 10 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states 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 02:07:23,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:23,601 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 02:07:23,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-30 02:07:23,601 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 02:07:23,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:23,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1749747090, now seen corresponding path program 1 times [2023-08-30 02:07:23,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:23,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318248432] [2023-08-30 02:07:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:24,439 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 02:07:24,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:24,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318248432] [2023-08-30 02:07:24,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318248432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:24,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:24,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 02:07:24,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036962592] [2023-08-30 02:07:24,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:24,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 02:07:24,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:24,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 02:07:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-30 02:07:25,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-30 02:07:25,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 101 transitions, 622 flow. Second operand has 11 states, 11 states have (on average 268.6363636363636) internal successors, (2955), 11 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states 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 02:07:25,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:25,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-30 02:07:25,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:26,553 INFO L130 PetriNetUnfolder]: 2114/3712 cut-off events. [2023-08-30 02:07:26,553 INFO L131 PetriNetUnfolder]: For 1632/1632 co-relation queries the response was YES. [2023-08-30 02:07:26,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8674 conditions, 3712 events. 2114/3712 cut-off events. For 1632/1632 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17469 event pairs, 647 based on Foata normal form. 9/3113 useless extension candidates. Maximal degree in co-relation 8647. Up to 2353 conditions per place. [2023-08-30 02:07:26,567 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 120 selfloop transitions, 27 changer transitions 0/155 dead transitions. [2023-08-30 02:07:26,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 155 transitions, 1037 flow [2023-08-30 02:07:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 02:07:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 02:07:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2525 transitions. [2023-08-30 02:07:26,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725837391176037 [2023-08-30 02:07:26,570 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2525 transitions. [2023-08-30 02:07:26,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2525 transitions. [2023-08-30 02:07:26,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:26,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2525 transitions. [2023-08-30 02:07:26,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.55555555555554) internal successors, (2525), 9 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states 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 02:07:26,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:07:26,576 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 753.0) internal successors, (7530), 10 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states 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 02:07:26,576 INFO L175 Difference]: Start difference. First operand has 121 places, 101 transitions, 622 flow. Second operand 9 states and 2525 transitions. [2023-08-30 02:07:26,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 155 transitions, 1037 flow [2023-08-30 02:07:26,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1010 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 02:07:26,586 INFO L231 Difference]: Finished difference. Result has 124 places, 101 transitions, 659 flow [2023-08-30 02:07:26,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=659, PETRI_PLACES=124, PETRI_TRANSITIONS=101} [2023-08-30 02:07:26,586 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -15 predicate places. [2023-08-30 02:07:26,587 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 101 transitions, 659 flow [2023-08-30 02:07:26,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 268.6363636363636) internal successors, (2955), 11 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states 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 02:07:26,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:26,587 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 02:07:26,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-30 02:07:26,588 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 02:07:26,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:26,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2037496838, now seen corresponding path program 2 times [2023-08-30 02:07:26,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:26,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497980654] [2023-08-30 02:07:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:26,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:27,271 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 02:07:27,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:27,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497980654] [2023-08-30 02:07:27,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497980654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:27,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:27,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-30 02:07:27,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639342770] [2023-08-30 02:07:27,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:27,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 02:07:27,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:27,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 02:07:27,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-30 02:07:28,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-30 02:07:28,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 101 transitions, 659 flow. Second operand has 11 states, 11 states have (on average 268.6363636363636) internal successors, (2955), 11 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states 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 02:07:28,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:28,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-30 02:07:28,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:29,437 INFO L130 PetriNetUnfolder]: 2101/3682 cut-off events. [2023-08-30 02:07:29,438 INFO L131 PetriNetUnfolder]: For 2301/2301 co-relation queries the response was YES. [2023-08-30 02:07:29,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8854 conditions, 3682 events. 2101/3682 cut-off events. For 2301/2301 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17233 event pairs, 551 based on Foata normal form. 9/3089 useless extension candidates. Maximal degree in co-relation 8826. Up to 2061 conditions per place. [2023-08-30 02:07:29,452 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 117 selfloop transitions, 27 changer transitions 0/152 dead transitions. [2023-08-30 02:07:29,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 152 transitions, 1058 flow [2023-08-30 02:07:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 02:07:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 02:07:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2788 transitions. [2023-08-30 02:07:29,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3702523240371846 [2023-08-30 02:07:29,456 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2788 transitions. [2023-08-30 02:07:29,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2788 transitions. [2023-08-30 02:07:29,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:29,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2788 transitions. [2023-08-30 02:07:29,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 278.8) internal successors, (2788), 10 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states 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 02:07:29,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:07:29,464 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 753.0) internal successors, (8283), 11 states have internal predecessors, (8283), 0 states have call successors, (0), 0 states 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 02:07:29,464 INFO L175 Difference]: Start difference. First operand has 124 places, 101 transitions, 659 flow. Second operand 10 states and 2788 transitions. [2023-08-30 02:07:29,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 152 transitions, 1058 flow [2023-08-30 02:07:29,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 152 transitions, 1020 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-30 02:07:29,475 INFO L231 Difference]: Finished difference. Result has 128 places, 101 transitions, 686 flow [2023-08-30 02:07:29,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=686, PETRI_PLACES=128, PETRI_TRANSITIONS=101} [2023-08-30 02:07:29,476 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -11 predicate places. [2023-08-30 02:07:29,476 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 101 transitions, 686 flow [2023-08-30 02:07:29,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 268.6363636363636) internal successors, (2955), 11 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states 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 02:07:29,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:29,476 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 02:07:29,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-30 02:07:29,477 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:29,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash 278044459, now seen corresponding path program 1 times [2023-08-30 02:07:29,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:29,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322053677] [2023-08-30 02:07:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:29,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:29,620 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 02:07:29,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:29,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322053677] [2023-08-30 02:07:29,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322053677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:29,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:29,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 02:07:29,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381675926] [2023-08-30 02:07:29,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:29,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 02:07:29,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:29,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 02:07:29,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 02:07:29,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-30 02:07:29,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 101 transitions, 686 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 02:07:29,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:29,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-30 02:07:29,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:30,145 INFO L130 PetriNetUnfolder]: 2386/4212 cut-off events. [2023-08-30 02:07:30,145 INFO L131 PetriNetUnfolder]: For 3177/3177 co-relation queries the response was YES. [2023-08-30 02:07:30,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10088 conditions, 4212 events. 2386/4212 cut-off events. For 3177/3177 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 21142 event pairs, 1059 based on Foata normal form. 0/3517 useless extension candidates. Maximal degree in co-relation 10059. Up to 3266 conditions per place. [2023-08-30 02:07:30,163 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 117 selfloop transitions, 3 changer transitions 0/137 dead transitions. [2023-08-30 02:07:30,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 137 transitions, 1014 flow [2023-08-30 02:07:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:07:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:07:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1356 transitions. [2023-08-30 02:07:30,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450199203187251 [2023-08-30 02:07:30,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1356 transitions. [2023-08-30 02:07:30,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1356 transitions. [2023-08-30 02:07:30,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:30,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1356 transitions. [2023-08-30 02:07:30,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 02:07:30,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:07:30,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:07:30,169 INFO L175 Difference]: Start difference. First operand has 128 places, 101 transitions, 686 flow. Second operand 4 states and 1356 transitions. [2023-08-30 02:07:30,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 137 transitions, 1014 flow [2023-08-30 02:07:30,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 137 transitions, 970 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 02:07:30,182 INFO L231 Difference]: Finished difference. Result has 125 places, 102 transitions, 658 flow [2023-08-30 02:07:30,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=658, PETRI_PLACES=125, PETRI_TRANSITIONS=102} [2023-08-30 02:07:30,183 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -14 predicate places. [2023-08-30 02:07:30,183 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 102 transitions, 658 flow [2023-08-30 02:07:30,184 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 02:07:30,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:30,184 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 02:07:30,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-30 02:07:30,185 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:30,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1619278936, now seen corresponding path program 1 times [2023-08-30 02:07:30,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:30,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345591582] [2023-08-30 02:07:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:30,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:30,221 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 02:07:30,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:30,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345591582] [2023-08-30 02:07:30,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345591582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:30,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:30,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:07:30,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074446831] [2023-08-30 02:07:30,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:30,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:07:30,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:30,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:07:30,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:07:30,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 753 [2023-08-30 02:07:30,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 102 transitions, 658 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 02:07:30,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:30,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 753 [2023-08-30 02:07:30,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:30,490 INFO L130 PetriNetUnfolder]: 1607/2932 cut-off events. [2023-08-30 02:07:30,490 INFO L131 PetriNetUnfolder]: For 2377/2377 co-relation queries the response was YES. [2023-08-30 02:07:30,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7410 conditions, 2932 events. 1607/2932 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 13720 event pairs, 811 based on Foata normal form. 0/2595 useless extension candidates. Maximal degree in co-relation 7380. Up to 1537 conditions per place. [2023-08-30 02:07:30,502 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 101 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2023-08-30 02:07:30,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 118 transitions, 920 flow [2023-08-30 02:07:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:07:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:07:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1030 transitions. [2023-08-30 02:07:30,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45595396193005755 [2023-08-30 02:07:30,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1030 transitions. [2023-08-30 02:07:30,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1030 transitions. [2023-08-30 02:07:30,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:30,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1030 transitions. [2023-08-30 02:07:30,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.3333333333333) internal successors, (1030), 3 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states 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 02:07:30,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:07:30,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:07:30,506 INFO L175 Difference]: Start difference. First operand has 125 places, 102 transitions, 658 flow. Second operand 3 states and 1030 transitions. [2023-08-30 02:07:30,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 118 transitions, 920 flow [2023-08-30 02:07:30,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 118 transitions, 912 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:07:30,520 INFO L231 Difference]: Finished difference. Result has 126 places, 102 transitions, 665 flow [2023-08-30 02:07:30,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=665, PETRI_PLACES=126, PETRI_TRANSITIONS=102} [2023-08-30 02:07:30,525 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -13 predicate places. [2023-08-30 02:07:30,525 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 102 transitions, 665 flow [2023-08-30 02:07:30,525 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 02:07:30,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:30,526 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 02:07:30,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-30 02:07:30,526 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:30,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -244183533, now seen corresponding path program 1 times [2023-08-30 02:07:30,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:30,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843956625] [2023-08-30 02:07:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:30,583 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 02:07:30,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:30,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843956625] [2023-08-30 02:07:30,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843956625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:30,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:30,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:07:30,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339022244] [2023-08-30 02:07:30,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:30,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:07:30,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:30,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:07:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:07:30,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 753 [2023-08-30 02:07:30,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 102 transitions, 665 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 02:07:30,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:30,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 753 [2023-08-30 02:07:30,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:31,126 INFO L130 PetriNetUnfolder]: 2397/4628 cut-off events. [2023-08-30 02:07:31,127 INFO L131 PetriNetUnfolder]: For 3805/3815 co-relation queries the response was YES. [2023-08-30 02:07:31,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11231 conditions, 4628 events. 2397/4628 cut-off events. For 3805/3815 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 26659 event pairs, 1151 based on Foata normal form. 8/4275 useless extension candidates. Maximal degree in co-relation 11200. Up to 2698 conditions per place. [2023-08-30 02:07:31,152 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 145 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2023-08-30 02:07:31,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 163 transitions, 1270 flow [2023-08-30 02:07:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:07:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:07:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-30 02:07:31,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718902169101372 [2023-08-30 02:07:31,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-30 02:07:31,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-30 02:07:31,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:31,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-30 02:07:31,156 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 02:07:31,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:07:31,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:07:31,158 INFO L175 Difference]: Start difference. First operand has 126 places, 102 transitions, 665 flow. Second operand 3 states and 1066 transitions. [2023-08-30 02:07:31,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 163 transitions, 1270 flow [2023-08-30 02:07:31,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 163 transitions, 1262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 02:07:31,170 INFO L231 Difference]: Finished difference. Result has 127 places, 103 transitions, 671 flow [2023-08-30 02:07:31,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=671, PETRI_PLACES=127, PETRI_TRANSITIONS=103} [2023-08-30 02:07:31,171 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -12 predicate places. [2023-08-30 02:07:31,171 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 103 transitions, 671 flow [2023-08-30 02:07:31,171 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 02:07:31,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:31,171 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 02:07:31,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-30 02:07:31,172 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:31,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:31,172 INFO L85 PathProgramCache]: Analyzing trace with hash 695068579, now seen corresponding path program 1 times [2023-08-30 02:07:31,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:31,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841446036] [2023-08-30 02:07:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:31,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:31,290 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 02:07:31,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:31,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841446036] [2023-08-30 02:07:31,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841446036] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:31,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:31,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:07:31,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524112658] [2023-08-30 02:07:31,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:31,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 02:07:31,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:31,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 02:07:31,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 02:07:31,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 753 [2023-08-30 02:07:31,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 103 transitions, 671 flow. Second operand has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 02:07:31,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:31,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 753 [2023-08-30 02:07:31,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:31,707 INFO L130 PetriNetUnfolder]: 1960/3722 cut-off events. [2023-08-30 02:07:31,708 INFO L131 PetriNetUnfolder]: For 3360/3361 co-relation queries the response was YES. [2023-08-30 02:07:31,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10088 conditions, 3722 events. 1960/3722 cut-off events. For 3360/3361 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 19081 event pairs, 530 based on Foata normal form. 319/3868 useless extension candidates. Maximal degree in co-relation 10056. Up to 2491 conditions per place. [2023-08-30 02:07:31,730 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 95 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2023-08-30 02:07:31,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 116 transitions, 930 flow [2023-08-30 02:07:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 02:07:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 02:07:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-30 02:07:31,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-30 02:07:31,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-30 02:07:31,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-30 02:07:31,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:31,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-30 02:07:31,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states 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 02:07:31,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:07:31,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states 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 02:07:31,736 INFO L175 Difference]: Start difference. First operand has 127 places, 103 transitions, 671 flow. Second operand 3 states and 1021 transitions. [2023-08-30 02:07:31,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 116 transitions, 930 flow [2023-08-30 02:07:31,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 116 transitions, 926 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:07:31,746 INFO L231 Difference]: Finished difference. Result has 128 places, 103 transitions, 683 flow [2023-08-30 02:07:31,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=683, PETRI_PLACES=128, PETRI_TRANSITIONS=103} [2023-08-30 02:07:31,747 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -11 predicate places. [2023-08-30 02:07:31,747 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 103 transitions, 683 flow [2023-08-30 02:07:31,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states 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 02:07:31,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:31,748 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 02:07:31,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-30 02:07:31,748 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 02:07:31,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:31,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1473818161, now seen corresponding path program 1 times [2023-08-30 02:07:31,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:31,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908377695] [2023-08-30 02:07:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:31,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:31,824 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 02:07:31,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:31,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908377695] [2023-08-30 02:07:31,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908377695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 02:07:31,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558428235] [2023-08-30 02:07:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:31,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:07:31,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 02:07:31,831 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 02:07:31,832 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 02:07:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 02:07:32,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 02:07:32,073 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 02:07:32,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 02:07:32,090 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 02:07:32,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558428235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 02:07:32,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 02:07:32,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-30 02:07:32,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627047991] [2023-08-30 02:07:32,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 02:07:32,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 02:07:32,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 02:07:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-30 02:07:32,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-30 02:07:32,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 103 transitions, 683 flow. Second operand has 7 states, 7 states have (on average 325.2857142857143) internal successors, (2277), 7 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states 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 02:07:32,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:32,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-30 02:07:32,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:32,969 INFO L130 PetriNetUnfolder]: 3027/6171 cut-off events. [2023-08-30 02:07:32,970 INFO L131 PetriNetUnfolder]: For 5511/5530 co-relation queries the response was YES. [2023-08-30 02:07:32,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16350 conditions, 6171 events. 3027/6171 cut-off events. For 5511/5530 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39119 event pairs, 446 based on Foata normal form. 509/6346 useless extension candidates. Maximal degree in co-relation 16318. Up to 1211 conditions per place. [2023-08-30 02:07:33,015 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 271 selfloop transitions, 6 changer transitions 0/293 dead transitions. [2023-08-30 02:07:33,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 293 transitions, 2116 flow [2023-08-30 02:07:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 02:07:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 02:07:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2149 transitions. [2023-08-30 02:07:33,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756529437804338 [2023-08-30 02:07:33,018 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2149 transitions. [2023-08-30 02:07:33,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2149 transitions. [2023-08-30 02:07:33,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:33,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2149 transitions. [2023-08-30 02:07:33,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 358.1666666666667) internal successors, (2149), 6 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states 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 02:07:33,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 02:07:33,024 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 0 states have call successors, (0), 0 states 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 02:07:33,024 INFO L175 Difference]: Start difference. First operand has 128 places, 103 transitions, 683 flow. Second operand 6 states and 2149 transitions. [2023-08-30 02:07:33,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 293 transitions, 2116 flow [2023-08-30 02:07:33,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 293 transitions, 2093 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 02:07:33,036 INFO L231 Difference]: Finished difference. Result has 136 places, 106 transitions, 717 flow [2023-08-30 02:07:33,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=717, PETRI_PLACES=136, PETRI_TRANSITIONS=106} [2023-08-30 02:07:33,036 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -3 predicate places. [2023-08-30 02:07:33,037 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 106 transitions, 717 flow [2023-08-30 02:07:33,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 325.2857142857143) internal successors, (2277), 7 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states 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 02:07:33,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:33,037 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 02:07:33,043 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 02:07:33,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 02:07:33,241 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 02:07:33,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:33,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1498115350, now seen corresponding path program 1 times [2023-08-30 02:07:33,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:33,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721493781] [2023-08-30 02:07:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:34,230 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 02:07:34,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721493781] [2023-08-30 02:07:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721493781] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:34,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:34,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:07:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087013768] [2023-08-30 02:07:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:34,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:07:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:07:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:07:35,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 753 [2023-08-30 02:07:35,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 106 transitions, 717 flow. Second operand has 14 states, 14 states have (on average 279.07142857142856) internal successors, (3907), 14 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states 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 02:07:35,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:35,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 753 [2023-08-30 02:07:35,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:36,907 INFO L130 PetriNetUnfolder]: 3476/6756 cut-off events. [2023-08-30 02:07:36,907 INFO L131 PetriNetUnfolder]: For 11297/11329 co-relation queries the response was YES. [2023-08-30 02:07:36,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20321 conditions, 6756 events. 3476/6756 cut-off events. For 11297/11329 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 40935 event pairs, 1951 based on Foata normal form. 0/6395 useless extension candidates. Maximal degree in co-relation 20285. Up to 3716 conditions per place. [2023-08-30 02:07:36,940 INFO L137 encePairwiseOnDemand]: 735/753 looper letters, 196 selfloop transitions, 42 changer transitions 0/245 dead transitions. [2023-08-30 02:07:36,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 245 transitions, 2033 flow [2023-08-30 02:07:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 02:07:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 02:07:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4597 transitions. [2023-08-30 02:07:36,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815571049136786 [2023-08-30 02:07:36,945 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4597 transitions. [2023-08-30 02:07:36,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4597 transitions. [2023-08-30 02:07:36,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:36,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4597 transitions. [2023-08-30 02:07:36,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 287.3125) internal successors, (4597), 16 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states 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 02:07:36,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states 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 02:07:36,959 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states 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 02:07:36,959 INFO L175 Difference]: Start difference. First operand has 136 places, 106 transitions, 717 flow. Second operand 16 states and 4597 transitions. [2023-08-30 02:07:36,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 245 transitions, 2033 flow [2023-08-30 02:07:36,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 245 transitions, 1920 flow, removed 42 selfloop flow, removed 1 redundant places. [2023-08-30 02:07:36,986 INFO L231 Difference]: Finished difference. Result has 154 places, 119 transitions, 884 flow [2023-08-30 02:07:36,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=884, PETRI_PLACES=154, PETRI_TRANSITIONS=119} [2023-08-30 02:07:36,988 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 15 predicate places. [2023-08-30 02:07:36,988 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 119 transitions, 884 flow [2023-08-30 02:07:36,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 279.07142857142856) internal successors, (3907), 14 states have internal predecessors, (3907), 0 states have call successors, (0), 0 states 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 02:07:36,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:36,989 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 02:07:36,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-30 02:07:36,989 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:36,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:36,990 INFO L85 PathProgramCache]: Analyzing trace with hash 682204528, now seen corresponding path program 2 times [2023-08-30 02:07:36,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:36,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144533720] [2023-08-30 02:07:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:36,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:37,907 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 02:07:37,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:37,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144533720] [2023-08-30 02:07:37,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144533720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:37,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:37,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:07:37,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962440010] [2023-08-30 02:07:37,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:37,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:07:37,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:07:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:07:39,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 753 [2023-08-30 02:07:39,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 119 transitions, 884 flow. Second operand has 14 states, 14 states have (on average 275.07142857142856) internal successors, (3851), 14 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states 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 02:07:39,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:39,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 753 [2023-08-30 02:07:39,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:40,671 INFO L130 PetriNetUnfolder]: 3403/6717 cut-off events. [2023-08-30 02:07:40,671 INFO L131 PetriNetUnfolder]: For 10166/10182 co-relation queries the response was YES. [2023-08-30 02:07:40,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20383 conditions, 6717 events. 3403/6717 cut-off events. For 10166/10182 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 41076 event pairs, 1005 based on Foata normal form. 23/6432 useless extension candidates. Maximal degree in co-relation 20342. Up to 2800 conditions per place. [2023-08-30 02:07:40,706 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 194 selfloop transitions, 48 changer transitions 0/249 dead transitions. [2023-08-30 02:07:40,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 249 transitions, 2068 flow [2023-08-30 02:07:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 02:07:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 02:07:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4803 transitions. [2023-08-30 02:07:40,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3752050621045231 [2023-08-30 02:07:40,711 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4803 transitions. [2023-08-30 02:07:40,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4803 transitions. [2023-08-30 02:07:40,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:40,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4803 transitions. [2023-08-30 02:07:40,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 282.52941176470586) internal successors, (4803), 17 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states 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 02:07:40,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 753.0) internal successors, (13554), 18 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states 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 02:07:40,725 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 753.0) internal successors, (13554), 18 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states 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 02:07:40,725 INFO L175 Difference]: Start difference. First operand has 154 places, 119 transitions, 884 flow. Second operand 17 states and 4803 transitions. [2023-08-30 02:07:40,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 249 transitions, 2068 flow [2023-08-30 02:07:40,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 249 transitions, 1977 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-30 02:07:40,755 INFO L231 Difference]: Finished difference. Result has 164 places, 125 transitions, 960 flow [2023-08-30 02:07:40,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=960, PETRI_PLACES=164, PETRI_TRANSITIONS=125} [2023-08-30 02:07:40,755 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 25 predicate places. [2023-08-30 02:07:40,755 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 125 transitions, 960 flow [2023-08-30 02:07:40,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.07142857142856) internal successors, (3851), 14 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states 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 02:07:40,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:40,756 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 02:07:40,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-30 02:07:40,757 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 02:07:40,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:40,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1905397562, now seen corresponding path program 3 times [2023-08-30 02:07:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:40,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272908129] [2023-08-30 02:07:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:40,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:42,597 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 02:07:42,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272908129] [2023-08-30 02:07:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272908129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:42,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:42,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:07:42,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937993353] [2023-08-30 02:07:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:42,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:07:42,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:07:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:07:45,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 753 [2023-08-30 02:07:45,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 125 transitions, 960 flow. Second operand has 16 states, 16 states have (on average 261.8125) internal successors, (4189), 16 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states 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 02:07:45,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:45,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 753 [2023-08-30 02:07:45,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:48,117 INFO L130 PetriNetUnfolder]: 4588/8922 cut-off events. [2023-08-30 02:07:48,118 INFO L131 PetriNetUnfolder]: For 11528/11552 co-relation queries the response was YES. [2023-08-30 02:07:48,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26619 conditions, 8922 events. 4588/8922 cut-off events. For 11528/11552 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 57396 event pairs, 1133 based on Foata normal form. 0/8605 useless extension candidates. Maximal degree in co-relation 26574. Up to 2776 conditions per place. [2023-08-30 02:07:48,167 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 219 selfloop transitions, 41 changer transitions 0/267 dead transitions. [2023-08-30 02:07:48,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 267 transitions, 2158 flow [2023-08-30 02:07:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:07:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:07:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3820 transitions. [2023-08-30 02:07:48,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623600834756213 [2023-08-30 02:07:48,171 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3820 transitions. [2023-08-30 02:07:48,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3820 transitions. [2023-08-30 02:07:48,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:48,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3820 transitions. [2023-08-30 02:07:48,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 272.85714285714283) internal successors, (3820), 14 states have internal predecessors, (3820), 0 states have call successors, (0), 0 states 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 02:07:48,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states 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 02:07:48,182 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states 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 02:07:48,182 INFO L175 Difference]: Start difference. First operand has 164 places, 125 transitions, 960 flow. Second operand 14 states and 3820 transitions. [2023-08-30 02:07:48,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 267 transitions, 2158 flow [2023-08-30 02:07:48,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 267 transitions, 2097 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-30 02:07:48,213 INFO L231 Difference]: Finished difference. Result has 171 places, 132 transitions, 1060 flow [2023-08-30 02:07:48,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1060, PETRI_PLACES=171, PETRI_TRANSITIONS=132} [2023-08-30 02:07:48,214 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 32 predicate places. [2023-08-30 02:07:48,214 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 132 transitions, 1060 flow [2023-08-30 02:07:48,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 261.8125) internal successors, (4189), 16 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states 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 02:07:48,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:48,215 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 02:07:48,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-30 02:07:48,215 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 02:07:48,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1727020662, now seen corresponding path program 1 times [2023-08-30 02:07:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:48,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121029296] [2023-08-30 02:07:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:48,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:49,585 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 02:07:49,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:49,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121029296] [2023-08-30 02:07:49,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121029296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:49,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:49,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-30 02:07:49,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056448934] [2023-08-30 02:07:49,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:49,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 02:07:49,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 02:07:49,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-08-30 02:07:51,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 753 [2023-08-30 02:07:51,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 132 transitions, 1060 flow. Second operand has 16 states, 16 states have (on average 263.875) internal successors, (4222), 16 states have internal predecessors, (4222), 0 states have call successors, (0), 0 states 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 02:07:51,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:51,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 753 [2023-08-30 02:07:51,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:53,131 INFO L130 PetriNetUnfolder]: 4844/9432 cut-off events. [2023-08-30 02:07:53,131 INFO L131 PetriNetUnfolder]: For 13537/13592 co-relation queries the response was YES. [2023-08-30 02:07:53,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28840 conditions, 9432 events. 4844/9432 cut-off events. For 13537/13592 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 59429 event pairs, 1193 based on Foata normal form. 163/9428 useless extension candidates. Maximal degree in co-relation 28790. Up to 2674 conditions per place. [2023-08-30 02:07:53,194 INFO L137 encePairwiseOnDemand]: 736/753 looper letters, 213 selfloop transitions, 39 changer transitions 0/259 dead transitions. [2023-08-30 02:07:53,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 259 transitions, 2171 flow [2023-08-30 02:07:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 02:07:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 02:07:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3836 transitions. [2023-08-30 02:07:53,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36387782204515273 [2023-08-30 02:07:53,197 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3836 transitions. [2023-08-30 02:07:53,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3836 transitions. [2023-08-30 02:07:53,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:53,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3836 transitions. [2023-08-30 02:07:53,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 274.0) internal successors, (3836), 14 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states 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 02:07:53,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states 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 02:07:53,209 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 753.0) internal successors, (11295), 15 states have internal predecessors, (11295), 0 states have call successors, (0), 0 states 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 02:07:53,209 INFO L175 Difference]: Start difference. First operand has 171 places, 132 transitions, 1060 flow. Second operand 14 states and 3836 transitions. [2023-08-30 02:07:53,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 259 transitions, 2171 flow [2023-08-30 02:07:53,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 259 transitions, 2122 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-30 02:07:53,253 INFO L231 Difference]: Finished difference. Result has 179 places, 135 transitions, 1130 flow [2023-08-30 02:07:53,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1130, PETRI_PLACES=179, PETRI_TRANSITIONS=135} [2023-08-30 02:07:53,254 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 40 predicate places. [2023-08-30 02:07:53,254 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 135 transitions, 1130 flow [2023-08-30 02:07:53,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 263.875) internal successors, (4222), 16 states have internal predecessors, (4222), 0 states have call successors, (0), 0 states 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 02:07:53,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:53,254 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, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:53,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-30 02:07:53,254 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:53,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:53,255 INFO L85 PathProgramCache]: Analyzing trace with hash -485973527, now seen corresponding path program 1 times [2023-08-30 02:07:53,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:53,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419821851] [2023-08-30 02:07:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:53,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:53,327 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 02:07:53,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419821851] [2023-08-30 02:07:53,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419821851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:53,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:53,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 02:07:53,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197345673] [2023-08-30 02:07:53,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:53,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 02:07:53,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 02:07:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 02:07:53,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 753 [2023-08-30 02:07:53,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 135 transitions, 1130 flow. Second operand has 5 states, 5 states have (on average 321.8) internal successors, (1609), 5 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states 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 02:07:53,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:53,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 753 [2023-08-30 02:07:53,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:54,431 INFO L130 PetriNetUnfolder]: 4642/9147 cut-off events. [2023-08-30 02:07:54,431 INFO L131 PetriNetUnfolder]: For 16056/16178 co-relation queries the response was YES. [2023-08-30 02:07:54,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28594 conditions, 9147 events. 4642/9147 cut-off events. For 16056/16178 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 58210 event pairs, 3043 based on Foata normal form. 84/9032 useless extension candidates. Maximal degree in co-relation 28541. Up to 6837 conditions per place. [2023-08-30 02:07:54,487 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 190 selfloop transitions, 3 changer transitions 0/209 dead transitions. [2023-08-30 02:07:54,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 209 transitions, 2092 flow [2023-08-30 02:07:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 02:07:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 02:07:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1359 transitions. [2023-08-30 02:07:54,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45119521912350596 [2023-08-30 02:07:54,490 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1359 transitions. [2023-08-30 02:07:54,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1359 transitions. [2023-08-30 02:07:54,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:54,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1359 transitions. [2023-08-30 02:07:54,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.75) internal successors, (1359), 4 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states 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 02:07:54,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:07:54,492 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 753.0) internal successors, (3765), 5 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states 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 02:07:54,493 INFO L175 Difference]: Start difference. First operand has 179 places, 135 transitions, 1130 flow. Second operand 4 states and 1359 transitions. [2023-08-30 02:07:54,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 209 transitions, 2092 flow [2023-08-30 02:07:54,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 209 transitions, 1962 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-30 02:07:54,533 INFO L231 Difference]: Finished difference. Result has 172 places, 135 transitions, 1061 flow [2023-08-30 02:07:54,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1061, PETRI_PLACES=172, PETRI_TRANSITIONS=135} [2023-08-30 02:07:54,533 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 33 predicate places. [2023-08-30 02:07:54,533 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 135 transitions, 1061 flow [2023-08-30 02:07:54,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 321.8) internal successors, (1609), 5 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states 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 02:07:54,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:54,534 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, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:54,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-30 02:07:54,534 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:54,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:54,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1794439543, now seen corresponding path program 1 times [2023-08-30 02:07:54,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:54,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375585042] [2023-08-30 02:07:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:54,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:55,558 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 02:07:55,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:55,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375585042] [2023-08-30 02:07:55,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375585042] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:55,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:55,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:07:55,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102443080] [2023-08-30 02:07:55,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:07:55,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:07:55,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:07:55,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:07:55,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:07:57,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 753 [2023-08-30 02:07:57,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 135 transitions, 1061 flow. Second operand has 14 states, 14 states have (on average 275.57142857142856) internal successors, (3858), 14 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states 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 02:07:57,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:07:57,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 753 [2023-08-30 02:07:57,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:07:58,631 INFO L130 PetriNetUnfolder]: 4829/9431 cut-off events. [2023-08-30 02:07:58,631 INFO L131 PetriNetUnfolder]: For 15705/15735 co-relation queries the response was YES. [2023-08-30 02:07:58,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29724 conditions, 9431 events. 4829/9431 cut-off events. For 15705/15735 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 60130 event pairs, 2067 based on Foata normal form. 5/9270 useless extension candidates. Maximal degree in co-relation 29671. Up to 5227 conditions per place. [2023-08-30 02:07:58,690 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 205 selfloop transitions, 50 changer transitions 0/262 dead transitions. [2023-08-30 02:07:58,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 262 transitions, 2346 flow [2023-08-30 02:07:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 02:07:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 02:07:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4529 transitions. [2023-08-30 02:07:58,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37591301460823373 [2023-08-30 02:07:58,695 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4529 transitions. [2023-08-30 02:07:58,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4529 transitions. [2023-08-30 02:07:58,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:07:58,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4529 transitions. [2023-08-30 02:07:58,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 283.0625) internal successors, (4529), 16 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states 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 02:07:58,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states 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 02:07:58,707 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 753.0) internal successors, (12801), 17 states have internal predecessors, (12801), 0 states have call successors, (0), 0 states 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 02:07:58,708 INFO L175 Difference]: Start difference. First operand has 172 places, 135 transitions, 1061 flow. Second operand 16 states and 4529 transitions. [2023-08-30 02:07:58,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 262 transitions, 2346 flow [2023-08-30 02:07:58,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 262 transitions, 2286 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 02:07:58,768 INFO L231 Difference]: Finished difference. Result has 186 places, 138 transitions, 1206 flow [2023-08-30 02:07:58,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1206, PETRI_PLACES=186, PETRI_TRANSITIONS=138} [2023-08-30 02:07:58,769 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 47 predicate places. [2023-08-30 02:07:58,769 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 138 transitions, 1206 flow [2023-08-30 02:07:58,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.57142857142856) internal successors, (3858), 14 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states 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 02:07:58,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:07:58,770 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, 1, 1, 1, 1, 1, 1] [2023-08-30 02:07:58,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-30 02:07:58,770 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:07:58,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:07:58,771 INFO L85 PathProgramCache]: Analyzing trace with hash -64428823, now seen corresponding path program 2 times [2023-08-30 02:07:58,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:07:58,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247363827] [2023-08-30 02:07:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:07:58,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:07:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:07:59,998 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 02:07:59,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:07:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247363827] [2023-08-30 02:07:59,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247363827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:07:59,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:07:59,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-30 02:07:59,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573113164] [2023-08-30 02:07:59,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:00,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 02:08:00,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:00,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 02:08:00,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-30 02:08:02,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 753 [2023-08-30 02:08:02,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 138 transitions, 1206 flow. Second operand has 14 states, 14 states have (on average 275.57142857142856) internal successors, (3858), 14 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states 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 02:08:02,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:02,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 753 [2023-08-30 02:08:02,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:04,514 INFO L130 PetriNetUnfolder]: 4209/8268 cut-off events. [2023-08-30 02:08:04,514 INFO L131 PetriNetUnfolder]: For 14627/14658 co-relation queries the response was YES. [2023-08-30 02:08:04,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27052 conditions, 8268 events. 4209/8268 cut-off events. For 14627/14658 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 50799 event pairs, 1521 based on Foata normal form. 6/8118 useless extension candidates. Maximal degree in co-relation 26997. Up to 4194 conditions per place. [2023-08-30 02:08:04,549 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 210 selfloop transitions, 55 changer transitions 0/272 dead transitions. [2023-08-30 02:08:04,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 272 transitions, 2500 flow [2023-08-30 02:08:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 02:08:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 02:08:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4806 transitions. [2023-08-30 02:08:04,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754394187954066 [2023-08-30 02:08:04,554 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4806 transitions. [2023-08-30 02:08:04,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4806 transitions. [2023-08-30 02:08:04,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:04,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4806 transitions. [2023-08-30 02:08:04,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 282.70588235294116) internal successors, (4806), 17 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states 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 02:08:04,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 753.0) internal successors, (13554), 18 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states 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 02:08:04,567 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 753.0) internal successors, (13554), 18 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states 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 02:08:04,567 INFO L175 Difference]: Start difference. First operand has 186 places, 138 transitions, 1206 flow. Second operand 17 states and 4806 transitions. [2023-08-30 02:08:04,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 272 transitions, 2500 flow [2023-08-30 02:08:04,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 272 transitions, 2436 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-30 02:08:04,610 INFO L231 Difference]: Finished difference. Result has 192 places, 137 transitions, 1275 flow [2023-08-30 02:08:04,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1275, PETRI_PLACES=192, PETRI_TRANSITIONS=137} [2023-08-30 02:08:04,611 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 53 predicate places. [2023-08-30 02:08:04,611 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 137 transitions, 1275 flow [2023-08-30 02:08:04,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 275.57142857142856) internal successors, (3858), 14 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states 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 02:08:04,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:04,612 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:08:04,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-30 02:08:04,612 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:04,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:04,613 INFO L85 PathProgramCache]: Analyzing trace with hash 437960755, now seen corresponding path program 1 times [2023-08-30 02:08:04,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:04,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676219768] [2023-08-30 02:08:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:04,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:07,303 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 02:08:07,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:07,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676219768] [2023-08-30 02:08:07,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676219768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:07,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:07,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-30 02:08:07,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386353303] [2023-08-30 02:08:07,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:07,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 02:08:07,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:07,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 02:08:07,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2023-08-30 02:08:15,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-30 02:08:15,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 137 transitions, 1275 flow. Second operand has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 02:08:15,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:15,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-30 02:08:15,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:17,834 INFO L130 PetriNetUnfolder]: 4561/8948 cut-off events. [2023-08-30 02:08:17,834 INFO L131 PetriNetUnfolder]: For 17670/17698 co-relation queries the response was YES. [2023-08-30 02:08:17,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29771 conditions, 8948 events. 4561/8948 cut-off events. For 17670/17698 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 55845 event pairs, 2113 based on Foata normal form. 0/8786 useless extension candidates. Maximal degree in co-relation 29714. Up to 7498 conditions per place. [2023-08-30 02:08:17,981 INFO L137 encePairwiseOnDemand]: 728/753 looper letters, 229 selfloop transitions, 65 changer transitions 0/301 dead transitions. [2023-08-30 02:08:17,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 301 transitions, 2719 flow [2023-08-30 02:08:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 02:08:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 02:08:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7984 transitions. [2023-08-30 02:08:17,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3534307215582116 [2023-08-30 02:08:17,992 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7984 transitions. [2023-08-30 02:08:17,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7984 transitions. [2023-08-30 02:08:17,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:17,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7984 transitions. [2023-08-30 02:08:18,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 266.1333333333333) internal successors, (7984), 30 states have internal predecessors, (7984), 0 states have call successors, (0), 0 states 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 02:08:18,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 02:08:18,014 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 02:08:18,014 INFO L175 Difference]: Start difference. First operand has 192 places, 137 transitions, 1275 flow. Second operand 30 states and 7984 transitions. [2023-08-30 02:08:18,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 301 transitions, 2719 flow [2023-08-30 02:08:18,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 301 transitions, 2573 flow, removed 1 selfloop flow, removed 14 redundant places. [2023-08-30 02:08:18,071 INFO L231 Difference]: Finished difference. Result has 221 places, 201 transitions, 1857 flow [2023-08-30 02:08:18,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1857, PETRI_PLACES=221, PETRI_TRANSITIONS=201} [2023-08-30 02:08:18,071 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 82 predicate places. [2023-08-30 02:08:18,072 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 201 transitions, 1857 flow [2023-08-30 02:08:18,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 02:08:18,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:18,073 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:08:18,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-30 02:08:18,073 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:18,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:18,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1588328903, now seen corresponding path program 2 times [2023-08-30 02:08:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:18,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656705101] [2023-08-30 02:08:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:18,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:20,507 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 02:08:20,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656705101] [2023-08-30 02:08:20,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656705101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:20,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:20,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-30 02:08:20,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268999149] [2023-08-30 02:08:20,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:20,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 02:08:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 02:08:20,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-08-30 02:08:29,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-30 02:08:29,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 201 transitions, 1857 flow. Second operand has 23 states, 23 states have (on average 258.60869565217394) internal successors, (5948), 23 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states 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 02:08:29,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:29,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-30 02:08:29,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:32,682 INFO L130 PetriNetUnfolder]: 4855/9500 cut-off events. [2023-08-30 02:08:32,682 INFO L131 PetriNetUnfolder]: For 22566/22626 co-relation queries the response was YES. [2023-08-30 02:08:32,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33515 conditions, 9500 events. 4855/9500 cut-off events. For 22566/22626 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 60166 event pairs, 2372 based on Foata normal form. 10/9470 useless extension candidates. Maximal degree in co-relation 33444. Up to 7834 conditions per place. [2023-08-30 02:08:32,743 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 276 selfloop transitions, 64 changer transitions 0/347 dead transitions. [2023-08-30 02:08:32,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 347 transitions, 3384 flow [2023-08-30 02:08:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 02:08:32,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 02:08:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7126 transitions. [2023-08-30 02:08:32,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3504992376174315 [2023-08-30 02:08:32,750 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7126 transitions. [2023-08-30 02:08:32,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7126 transitions. [2023-08-30 02:08:32,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:32,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7126 transitions. [2023-08-30 02:08:32,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 263.9259259259259) internal successors, (7126), 27 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states 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 02:08:32,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 753.0) internal successors, (21084), 28 states have internal predecessors, (21084), 0 states have call successors, (0), 0 states 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 02:08:32,767 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 753.0) internal successors, (21084), 28 states have internal predecessors, (21084), 0 states have call successors, (0), 0 states 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 02:08:32,767 INFO L175 Difference]: Start difference. First operand has 221 places, 201 transitions, 1857 flow. Second operand 27 states and 7126 transitions. [2023-08-30 02:08:32,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 347 transitions, 3384 flow [2023-08-30 02:08:32,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 347 transitions, 3350 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-08-30 02:08:32,828 INFO L231 Difference]: Finished difference. Result has 261 places, 248 transitions, 2501 flow [2023-08-30 02:08:32,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1825, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2501, PETRI_PLACES=261, PETRI_TRANSITIONS=248} [2023-08-30 02:08:32,828 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 122 predicate places. [2023-08-30 02:08:32,828 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 248 transitions, 2501 flow [2023-08-30 02:08:32,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 258.60869565217394) internal successors, (5948), 23 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states 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 02:08:32,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:32,829 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:08:32,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-30 02:08:32,829 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:32,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash 975787803, now seen corresponding path program 3 times [2023-08-30 02:08:32,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:32,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20045944] [2023-08-30 02:08:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:32,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:35,402 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 02:08:35,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:35,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20045944] [2023-08-30 02:08:35,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20045944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:35,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:35,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-08-30 02:08:35,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859852072] [2023-08-30 02:08:35,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:35,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 02:08:35,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:35,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 02:08:35,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-08-30 02:08:43,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 753 [2023-08-30 02:08:43,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 248 transitions, 2501 flow. Second operand has 22 states, 22 states have (on average 262.6818181818182) internal successors, (5779), 22 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states 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 02:08:43,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:08:43,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 753 [2023-08-30 02:08:43,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:08:47,148 INFO L130 PetriNetUnfolder]: 5128/10105 cut-off events. [2023-08-30 02:08:47,148 INFO L131 PetriNetUnfolder]: For 29297/29387 co-relation queries the response was YES. [2023-08-30 02:08:47,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38051 conditions, 10105 events. 5128/10105 cut-off events. For 29297/29387 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 65240 event pairs, 1971 based on Foata normal form. 10/10087 useless extension candidates. Maximal degree in co-relation 37966. Up to 8101 conditions per place. [2023-08-30 02:08:47,227 INFO L137 encePairwiseOnDemand]: 729/753 looper letters, 322 selfloop transitions, 92 changer transitions 0/421 dead transitions. [2023-08-30 02:08:47,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 421 transitions, 4417 flow [2023-08-30 02:08:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-30 02:08:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-30 02:08:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 8308 transitions. [2023-08-30 02:08:47,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3559096945551129 [2023-08-30 02:08:47,232 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 8308 transitions. [2023-08-30 02:08:47,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 8308 transitions. [2023-08-30 02:08:47,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:08:47,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 8308 transitions. [2023-08-30 02:08:47,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 268.0) internal successors, (8308), 31 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states 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 02:08:47,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 753.0) internal successors, (24096), 32 states have internal predecessors, (24096), 0 states have call successors, (0), 0 states 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 02:08:47,254 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 753.0) internal successors, (24096), 32 states have internal predecessors, (24096), 0 states have call successors, (0), 0 states 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 02:08:47,255 INFO L175 Difference]: Start difference. First operand has 261 places, 248 transitions, 2501 flow. Second operand 31 states and 8308 transitions. [2023-08-30 02:08:47,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 421 transitions, 4417 flow [2023-08-30 02:08:47,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 421 transitions, 4343 flow, removed 35 selfloop flow, removed 1 redundant places. [2023-08-30 02:08:47,341 INFO L231 Difference]: Finished difference. Result has 301 places, 303 transitions, 3297 flow [2023-08-30 02:08:47,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3297, PETRI_PLACES=301, PETRI_TRANSITIONS=303} [2023-08-30 02:08:47,341 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 162 predicate places. [2023-08-30 02:08:47,341 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 303 transitions, 3297 flow [2023-08-30 02:08:47,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 262.6818181818182) internal successors, (5779), 22 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states 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 02:08:47,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:08:47,342 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:08:47,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-30 02:08:47,342 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:08:47,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:08:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 948622371, now seen corresponding path program 4 times [2023-08-30 02:08:47,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:08:47,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010705019] [2023-08-30 02:08:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:08:47,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:08:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:08:56,861 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 02:08:56,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:08:56,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010705019] [2023-08-30 02:08:56,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010705019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:08:56,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:08:56,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-08-30 02:08:56,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563099308] [2023-08-30 02:08:56,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:08:56,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 02:08:56,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:08:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 02:08:56,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-08-30 02:09:59,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-30 02:09:59,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 303 transitions, 3297 flow. Second operand has 24 states, 24 states have (on average 258.5416666666667) internal successors, (6205), 24 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 02:09:59,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:09:59,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-30 02:09:59,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:10:27,868 INFO L130 PetriNetUnfolder]: 5388/10605 cut-off events. [2023-08-30 02:10:27,868 INFO L131 PetriNetUnfolder]: For 37799/37929 co-relation queries the response was YES. [2023-08-30 02:10:27,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42553 conditions, 10605 events. 5388/10605 cut-off events. For 37799/37929 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 69267 event pairs, 2183 based on Foata normal form. 10/10587 useless extension candidates. Maximal degree in co-relation 42456. Up to 9079 conditions per place. [2023-08-30 02:10:27,933 INFO L137 encePairwiseOnDemand]: 726/753 looper letters, 372 selfloop transitions, 59 changer transitions 0/438 dead transitions. [2023-08-30 02:10:27,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 438 transitions, 5093 flow [2023-08-30 02:10:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 02:10:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 02:10:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 7382 transitions. [2023-08-30 02:10:27,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3501233162587744 [2023-08-30 02:10:27,938 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 7382 transitions. [2023-08-30 02:10:27,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 7382 transitions. [2023-08-30 02:10:27,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:10:27,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 7382 transitions. [2023-08-30 02:10:27,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 263.64285714285717) internal successors, (7382), 28 states have internal predecessors, (7382), 0 states have call successors, (0), 0 states 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 02:10:27,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 753.0) internal successors, (21837), 29 states have internal predecessors, (21837), 0 states have call successors, (0), 0 states 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 02:10:27,959 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 753.0) internal successors, (21837), 29 states have internal predecessors, (21837), 0 states have call successors, (0), 0 states 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 02:10:27,960 INFO L175 Difference]: Start difference. First operand has 301 places, 303 transitions, 3297 flow. Second operand 28 states and 7382 transitions. [2023-08-30 02:10:27,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 438 transitions, 5093 flow [2023-08-30 02:10:28,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 438 transitions, 4851 flow, removed 95 selfloop flow, removed 4 redundant places. [2023-08-30 02:10:28,269 INFO L231 Difference]: Finished difference. Result has 340 places, 353 transitions, 3864 flow [2023-08-30 02:10:28,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=3061, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3864, PETRI_PLACES=340, PETRI_TRANSITIONS=353} [2023-08-30 02:10:28,270 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 201 predicate places. [2023-08-30 02:10:28,270 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 353 transitions, 3864 flow [2023-08-30 02:10:28,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 258.5416666666667) internal successors, (6205), 24 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 02:10:28,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:10:28,272 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:10:28,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-30 02:10:28,272 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:10:28,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:10:28,273 INFO L85 PathProgramCache]: Analyzing trace with hash -273683617, now seen corresponding path program 5 times [2023-08-30 02:10:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:10:28,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49846133] [2023-08-30 02:10:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:10:28,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:10:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:10:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:10:31,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:10:31,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49846133] [2023-08-30 02:10:31,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49846133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:10:31,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:10:31,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-08-30 02:10:31,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106692846] [2023-08-30 02:10:31,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:10:31,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 02:10:31,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:10:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 02:10:31,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-30 02:10:56,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-30 02:10:56,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 353 transitions, 3864 flow. Second operand has 24 states, 24 states have (on average 260.5416666666667) internal successors, (6253), 24 states have internal predecessors, (6253), 0 states have call successors, (0), 0 states 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 02:10:56,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:10:56,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-30 02:10:56,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:11:03,059 INFO L130 PetriNetUnfolder]: 5696/11222 cut-off events. [2023-08-30 02:11:03,059 INFO L131 PetriNetUnfolder]: For 46917/47093 co-relation queries the response was YES. [2023-08-30 02:11:03,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47451 conditions, 11222 events. 5696/11222 cut-off events. For 46917/47093 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 74481 event pairs, 2208 based on Foata normal form. 10/11204 useless extension candidates. Maximal degree in co-relation 47337. Up to 9178 conditions per place. [2023-08-30 02:11:03,149 INFO L137 encePairwiseOnDemand]: 728/753 looper letters, 430 selfloop transitions, 92 changer transitions 0/529 dead transitions. [2023-08-30 02:11:03,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 529 transitions, 6202 flow [2023-08-30 02:11:03,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 02:11:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 02:11:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7991 transitions. [2023-08-30 02:11:03,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374059318282425 [2023-08-30 02:11:03,191 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7991 transitions. [2023-08-30 02:11:03,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7991 transitions. [2023-08-30 02:11:03,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:11:03,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7991 transitions. [2023-08-30 02:11:03,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 266.3666666666667) internal successors, (7991), 30 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states 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 02:11:03,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 02:11:03,209 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 02:11:03,209 INFO L175 Difference]: Start difference. First operand has 340 places, 353 transitions, 3864 flow. Second operand 30 states and 7991 transitions. [2023-08-30 02:11:03,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 529 transitions, 6202 flow [2023-08-30 02:11:03,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 529 transitions, 5944 flow, removed 122 selfloop flow, removed 2 redundant places. [2023-08-30 02:11:03,356 INFO L231 Difference]: Finished difference. Result has 379 places, 404 transitions, 4605 flow [2023-08-30 02:11:03,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=3608, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4605, PETRI_PLACES=379, PETRI_TRANSITIONS=404} [2023-08-30 02:11:03,356 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 240 predicate places. [2023-08-30 02:11:03,356 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 404 transitions, 4605 flow [2023-08-30 02:11:03,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 260.5416666666667) internal successors, (6253), 24 states have internal predecessors, (6253), 0 states have call successors, (0), 0 states 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 02:11:03,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:11:03,358 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:11:03,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-30 02:11:03,358 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:11:03,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:11:03,358 INFO L85 PathProgramCache]: Analyzing trace with hash -804456605, now seen corresponding path program 6 times [2023-08-30 02:11:03,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:11:03,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982426247] [2023-08-30 02:11:03,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:11:03,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:11:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:11:28,386 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 02:11:28,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:11:28,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982426247] [2023-08-30 02:11:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982426247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:11:28,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:11:28,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-08-30 02:11:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277404291] [2023-08-30 02:11:28,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:11:28,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 02:11:28,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:11:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 02:11:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2023-08-30 02:12:51,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-30 02:12:51,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 404 transitions, 4605 flow. Second operand has 24 states, 24 states have (on average 258.5416666666667) internal successors, (6205), 24 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 02:12:51,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:12:51,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-30 02:12:51,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:13:15,075 INFO L130 PetriNetUnfolder]: 6447/12738 cut-off events. [2023-08-30 02:13:15,075 INFO L131 PetriNetUnfolder]: For 65295/65507 co-relation queries the response was YES. [2023-08-30 02:13:15,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56406 conditions, 12738 events. 6447/12738 cut-off events. For 65295/65507 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 87934 event pairs, 2442 based on Foata normal form. 24/12728 useless extension candidates. Maximal degree in co-relation 56280. Up to 8946 conditions per place. [2023-08-30 02:13:15,216 INFO L137 encePairwiseOnDemand]: 725/753 looper letters, 506 selfloop transitions, 127 changer transitions 0/640 dead transitions. [2023-08-30 02:13:15,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 640 transitions, 7884 flow [2023-08-30 02:13:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-30 02:13:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-30 02:13:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 8745 transitions. [2023-08-30 02:13:15,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.351925630810093 [2023-08-30 02:13:15,222 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 8745 transitions. [2023-08-30 02:13:15,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 8745 transitions. [2023-08-30 02:13:15,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:13:15,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 8745 transitions. [2023-08-30 02:13:15,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 265.0) internal successors, (8745), 33 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states 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 02:13:15,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 753.0) internal successors, (25602), 34 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states 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 02:13:15,246 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 753.0) internal successors, (25602), 34 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states 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 02:13:15,246 INFO L175 Difference]: Start difference. First operand has 379 places, 404 transitions, 4605 flow. Second operand 33 states and 8745 transitions. [2023-08-30 02:13:15,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 640 transitions, 7884 flow [2023-08-30 02:13:15,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 640 transitions, 7496 flow, removed 169 selfloop flow, removed 4 redundant places. [2023-08-30 02:13:15,802 INFO L231 Difference]: Finished difference. Result has 425 places, 468 transitions, 5650 flow [2023-08-30 02:13:15,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=4217, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5650, PETRI_PLACES=425, PETRI_TRANSITIONS=468} [2023-08-30 02:13:15,802 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 286 predicate places. [2023-08-30 02:13:15,802 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 468 transitions, 5650 flow [2023-08-30 02:13:15,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 258.5416666666667) internal successors, (6205), 24 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states 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 02:13:15,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:13:15,804 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:13:15,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-30 02:13:15,804 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:13:15,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:13:15,805 INFO L85 PathProgramCache]: Analyzing trace with hash -276091999, now seen corresponding path program 7 times [2023-08-30 02:13:15,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:13:15,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183750488] [2023-08-30 02:13:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:13:15,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:13:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:13:18,226 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 02:13:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:13:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183750488] [2023-08-30 02:13:18,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183750488] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:13:18,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:13:18,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-30 02:13:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660102321] [2023-08-30 02:13:18,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:13:18,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 02:13:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:13:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 02:13:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-08-30 02:13:25,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-30 02:13:25,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 468 transitions, 5650 flow. Second operand has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 02:13:25,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:13:25,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-30 02:13:25,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:13:30,654 INFO L130 PetriNetUnfolder]: 6933/13752 cut-off events. [2023-08-30 02:13:30,654 INFO L131 PetriNetUnfolder]: For 103234/103460 co-relation queries the response was YES. [2023-08-30 02:13:30,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66018 conditions, 13752 events. 6933/13752 cut-off events. For 103234/103460 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 97179 event pairs, 2202 based on Foata normal form. 46/13764 useless extension candidates. Maximal degree in co-relation 65874. Up to 8268 conditions per place. [2023-08-30 02:13:30,779 INFO L137 encePairwiseOnDemand]: 728/753 looper letters, 531 selfloop transitions, 137 changer transitions 0/675 dead transitions. [2023-08-30 02:13:30,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 675 transitions, 8944 flow [2023-08-30 02:13:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 02:13:30,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 02:13:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8016 transitions. [2023-08-30 02:13:30,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548472775564409 [2023-08-30 02:13:30,784 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8016 transitions. [2023-08-30 02:13:30,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8016 transitions. [2023-08-30 02:13:30,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:13:30,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8016 transitions. [2023-08-30 02:13:30,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 267.2) internal successors, (8016), 30 states have internal predecessors, (8016), 0 states have call successors, (0), 0 states 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 02:13:30,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 02:13:30,798 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 02:13:30,798 INFO L175 Difference]: Start difference. First operand has 425 places, 468 transitions, 5650 flow. Second operand 30 states and 8016 transitions. [2023-08-30 02:13:30,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 675 transitions, 8944 flow [2023-08-30 02:13:31,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 675 transitions, 8352 flow, removed 256 selfloop flow, removed 6 redundant places. [2023-08-30 02:13:31,404 INFO L231 Difference]: Finished difference. Result has 466 places, 522 transitions, 6570 flow [2023-08-30 02:13:31,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=5106, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6570, PETRI_PLACES=466, PETRI_TRANSITIONS=522} [2023-08-30 02:13:31,405 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 327 predicate places. [2023-08-30 02:13:31,405 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 522 transitions, 6570 flow [2023-08-30 02:13:31,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 02:13:31,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:13:31,406 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:13:31,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-30 02:13:31,407 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:13:31,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:13:31,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1241226753, now seen corresponding path program 8 times [2023-08-30 02:13:31,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:13:31,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145361160] [2023-08-30 02:13:31,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:13:31,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:13:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:13:33,293 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 02:13:33,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:13:33,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145361160] [2023-08-30 02:13:33,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145361160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:13:33,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:13:33,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-30 02:13:33,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349892052] [2023-08-30 02:13:33,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:13:33,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 02:13:33,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:13:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 02:13:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-08-30 02:13:41,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-30 02:13:41,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 522 transitions, 6570 flow. Second operand has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 02:13:41,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:13:41,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-30 02:13:41,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:13:47,677 INFO L130 PetriNetUnfolder]: 7280/14471 cut-off events. [2023-08-30 02:13:47,678 INFO L131 PetriNetUnfolder]: For 165946/166291 co-relation queries the response was YES. [2023-08-30 02:13:47,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75501 conditions, 14471 events. 7280/14471 cut-off events. For 165946/166291 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 103547 event pairs, 2076 based on Foata normal form. 115/14557 useless extension candidates. Maximal degree in co-relation 75338. Up to 7178 conditions per place. [2023-08-30 02:13:47,825 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 502 selfloop transitions, 288 changer transitions 0/797 dead transitions. [2023-08-30 02:13:47,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 797 transitions, 10832 flow [2023-08-30 02:13:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 02:13:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 02:13:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 9617 transitions. [2023-08-30 02:13:47,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547661207023757 [2023-08-30 02:13:47,831 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 9617 transitions. [2023-08-30 02:13:47,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 9617 transitions. [2023-08-30 02:13:47,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:13:47,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 9617 transitions. [2023-08-30 02:13:47,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 267.1388888888889) internal successors, (9617), 36 states have internal predecessors, (9617), 0 states have call successors, (0), 0 states 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 02:13:47,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 753.0) internal successors, (27861), 37 states have internal predecessors, (27861), 0 states have call successors, (0), 0 states 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 02:13:47,848 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 753.0) internal successors, (27861), 37 states have internal predecessors, (27861), 0 states have call successors, (0), 0 states 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 02:13:47,848 INFO L175 Difference]: Start difference. First operand has 466 places, 522 transitions, 6570 flow. Second operand 36 states and 9617 transitions. [2023-08-30 02:13:47,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 797 transitions, 10832 flow [2023-08-30 02:13:48,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 797 transitions, 10130 flow, removed 300 selfloop flow, removed 6 redundant places. [2023-08-30 02:13:48,955 INFO L231 Difference]: Finished difference. Result has 498 places, 604 transitions, 8245 flow [2023-08-30 02:13:48,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=5912, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8245, PETRI_PLACES=498, PETRI_TRANSITIONS=604} [2023-08-30 02:13:48,956 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 359 predicate places. [2023-08-30 02:13:48,956 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 604 transitions, 8245 flow [2023-08-30 02:13:48,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 260.76190476190476) internal successors, (5476), 21 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states 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 02:13:48,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:13:48,957 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:13:48,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-30 02:13:48,957 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:13:48,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:13:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash 254862047, now seen corresponding path program 9 times [2023-08-30 02:13:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:13:48,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166501678] [2023-08-30 02:13:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:13:48,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:13:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:13:51,030 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 02:13:51,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:13:51,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166501678] [2023-08-30 02:13:51,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166501678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:13:51,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:13:51,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-08-30 02:13:51,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406232619] [2023-08-30 02:13:51,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:13:51,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 02:13:51,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:13:51,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 02:13:51,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-08-30 02:13:59,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 753 [2023-08-30 02:13:59,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 604 transitions, 8245 flow. Second operand has 22 states, 22 states have (on average 262.6818181818182) internal successors, (5779), 22 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states 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 02:13:59,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:13:59,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 753 [2023-08-30 02:13:59,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:14:05,131 INFO L130 PetriNetUnfolder]: 7533/14865 cut-off events. [2023-08-30 02:14:05,131 INFO L131 PetriNetUnfolder]: For 178530/178876 co-relation queries the response was YES. [2023-08-30 02:14:05,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79451 conditions, 14865 events. 7533/14865 cut-off events. For 178530/178876 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 106273 event pairs, 2564 based on Foata normal form. 18/14840 useless extension candidates. Maximal degree in co-relation 79284. Up to 11764 conditions per place. [2023-08-30 02:14:05,290 INFO L137 encePairwiseOnDemand]: 729/753 looper letters, 608 selfloop transitions, 150 changer transitions 0/765 dead transitions. [2023-08-30 02:14:05,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 765 transitions, 11415 flow [2023-08-30 02:14:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 02:14:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 02:14:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8046 transitions. [2023-08-30 02:14:05,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3561752988047809 [2023-08-30 02:14:05,295 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8046 transitions. [2023-08-30 02:14:05,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8046 transitions. [2023-08-30 02:14:05,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:14:05,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8046 transitions. [2023-08-30 02:14:05,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 268.2) internal successors, (8046), 30 states have internal predecessors, (8046), 0 states have call successors, (0), 0 states 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 02:14:05,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 02:14:05,412 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 02:14:05,412 INFO L175 Difference]: Start difference. First operand has 498 places, 604 transitions, 8245 flow. Second operand 30 states and 8046 transitions. [2023-08-30 02:14:05,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 765 transitions, 11415 flow [2023-08-30 02:14:07,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 765 transitions, 10026 flow, removed 525 selfloop flow, removed 13 redundant places. [2023-08-30 02:14:07,033 INFO L231 Difference]: Finished difference. Result has 528 places, 645 transitions, 8412 flow [2023-08-30 02:14:07,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=7053, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8412, PETRI_PLACES=528, PETRI_TRANSITIONS=645} [2023-08-30 02:14:07,035 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 389 predicate places. [2023-08-30 02:14:07,035 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 645 transitions, 8412 flow [2023-08-30 02:14:07,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 262.6818181818182) internal successors, (5779), 22 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states 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 02:14:07,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:14:07,036 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:14:07,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-30 02:14:07,036 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:14:07,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:14:07,037 INFO L85 PathProgramCache]: Analyzing trace with hash -201092445, now seen corresponding path program 10 times [2023-08-30 02:14:07,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:14:07,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86697444] [2023-08-30 02:14:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:14:07,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:14:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:14:09,005 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 02:14:09,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:14:09,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86697444] [2023-08-30 02:14:09,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86697444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:14:09,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:14:09,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-30 02:14:09,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640804327] [2023-08-30 02:14:09,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:14:09,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 02:14:09,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:14:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 02:14:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-08-30 02:14:16,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 753 [2023-08-30 02:14:16,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 645 transitions, 8412 flow. Second operand has 21 states, 21 states have (on average 262.76190476190476) internal successors, (5518), 21 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states 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 02:14:16,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:14:16,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 753 [2023-08-30 02:14:16,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:14:23,432 INFO L130 PetriNetUnfolder]: 8629/17231 cut-off events. [2023-08-30 02:14:23,432 INFO L131 PetriNetUnfolder]: For 137198/137520 co-relation queries the response was YES. [2023-08-30 02:14:23,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85436 conditions, 17231 events. 8629/17231 cut-off events. For 137198/137520 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 129390 event pairs, 2122 based on Foata normal form. 94/17292 useless extension candidates. Maximal degree in co-relation 85256. Up to 8304 conditions per place. [2023-08-30 02:14:23,774 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 652 selfloop transitions, 290 changer transitions 0/949 dead transitions. [2023-08-30 02:14:23,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 949 transitions, 13186 flow [2023-08-30 02:14:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 02:14:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 02:14:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 9942 transitions. [2023-08-30 02:14:23,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.356842898675568 [2023-08-30 02:14:23,780 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 9942 transitions. [2023-08-30 02:14:23,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 9942 transitions. [2023-08-30 02:14:23,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:14:23,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 9942 transitions. [2023-08-30 02:14:23,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 268.7027027027027) internal successors, (9942), 37 states have internal predecessors, (9942), 0 states have call successors, (0), 0 states 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 02:14:23,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 753.0) internal successors, (28614), 38 states have internal predecessors, (28614), 0 states have call successors, (0), 0 states 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 02:14:23,800 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 753.0) internal successors, (28614), 38 states have internal predecessors, (28614), 0 states have call successors, (0), 0 states 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 02:14:23,800 INFO L175 Difference]: Start difference. First operand has 528 places, 645 transitions, 8412 flow. Second operand 37 states and 9942 transitions. [2023-08-30 02:14:23,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 949 transitions, 13186 flow [2023-08-30 02:14:25,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 949 transitions, 12564 flow, removed 260 selfloop flow, removed 6 redundant places. [2023-08-30 02:14:25,146 INFO L231 Difference]: Finished difference. Result has 581 places, 758 transitions, 10687 flow [2023-08-30 02:14:25,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=7794, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10687, PETRI_PLACES=581, PETRI_TRANSITIONS=758} [2023-08-30 02:14:25,147 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 442 predicate places. [2023-08-30 02:14:25,147 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 758 transitions, 10687 flow [2023-08-30 02:14:25,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 262.76190476190476) internal successors, (5518), 21 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states 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 02:14:25,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:14:25,148 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:14:25,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-30 02:14:25,148 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:14:25,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:14:25,148 INFO L85 PathProgramCache]: Analyzing trace with hash 721594627, now seen corresponding path program 11 times [2023-08-30 02:14:25,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:14:25,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218174508] [2023-08-30 02:14:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:14:25,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:14:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:14:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 02:14:54,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:14:54,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218174508] [2023-08-30 02:14:54,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218174508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:14:54,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:14:54,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-08-30 02:14:54,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178510098] [2023-08-30 02:14:54,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:14:54,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 02:14:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:14:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 02:14:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-08-30 02:16:56,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 753 [2023-08-30 02:16:56,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 758 transitions, 10687 flow. Second operand has 25 states, 25 states have (on average 251.48) internal successors, (6287), 25 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states 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 02:16:56,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:16:56,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 753 [2023-08-30 02:16:56,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:24,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-30 02:17:30,593 INFO L130 PetriNetUnfolder]: 9854/19616 cut-off events. [2023-08-30 02:17:30,593 INFO L131 PetriNetUnfolder]: For 199143/199465 co-relation queries the response was YES. [2023-08-30 02:17:30,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104083 conditions, 19616 events. 9854/19616 cut-off events. For 199143/199465 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 151378 event pairs, 2238 based on Foata normal form. 22/19599 useless extension candidates. Maximal degree in co-relation 103879. Up to 9149 conditions per place. [2023-08-30 02:17:30,903 INFO L137 encePairwiseOnDemand]: 723/753 looper letters, 796 selfloop transitions, 322 changer transitions 0/1124 dead transitions. [2023-08-30 02:17:30,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1124 transitions, 17668 flow [2023-08-30 02:17:30,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-30 02:17:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-30 02:17:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8751 transitions. [2023-08-30 02:17:30,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3418092336536208 [2023-08-30 02:17:30,909 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8751 transitions. [2023-08-30 02:17:30,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8751 transitions. [2023-08-30 02:17:30,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:30,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8751 transitions. [2023-08-30 02:17:30,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 257.38235294117646) internal successors, (8751), 34 states have internal predecessors, (8751), 0 states have call successors, (0), 0 states 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 02:17:31,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 753.0) internal successors, (26355), 35 states have internal predecessors, (26355), 0 states have call successors, (0), 0 states 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 02:17:31,053 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 753.0) internal successors, (26355), 35 states have internal predecessors, (26355), 0 states have call successors, (0), 0 states 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 02:17:31,053 INFO L175 Difference]: Start difference. First operand has 581 places, 758 transitions, 10687 flow. Second operand 34 states and 8751 transitions. [2023-08-30 02:17:31,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1124 transitions, 17668 flow [2023-08-30 02:17:33,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1124 transitions, 16406 flow, removed 580 selfloop flow, removed 6 redundant places. [2023-08-30 02:17:33,316 INFO L231 Difference]: Finished difference. Result has 628 places, 913 transitions, 13692 flow [2023-08-30 02:17:33,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=9989, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=13692, PETRI_PLACES=628, PETRI_TRANSITIONS=913} [2023-08-30 02:17:33,318 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 489 predicate places. [2023-08-30 02:17:33,318 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 913 transitions, 13692 flow [2023-08-30 02:17:33,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 251.48) internal successors, (6287), 25 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states 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 02:17:33,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:33,319 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:33,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-30 02:17:33,320 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:17:33,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1331153011, now seen corresponding path program 12 times [2023-08-30 02:17:33,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:17:33,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110639490] [2023-08-30 02:17:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:33,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:17:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:17:35,613 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 02:17:35,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:17:35,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110639490] [2023-08-30 02:17:35,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110639490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:17:35,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:17:35,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-08-30 02:17:35,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714394343] [2023-08-30 02:17:35,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:17:35,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 02:17:35,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:17:35,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 02:17:35,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2023-08-30 02:17:45,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-30 02:17:45,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 913 transitions, 13692 flow. Second operand has 22 states, 22 states have (on average 260.6818181818182) internal successors, (5735), 22 states have internal predecessors, (5735), 0 states have call successors, (0), 0 states 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 02:17:45,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:17:45,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-30 02:17:45,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:17:56,309 INFO L130 PetriNetUnfolder]: 10029/19980 cut-off events. [2023-08-30 02:17:56,309 INFO L131 PetriNetUnfolder]: For 241120/241627 co-relation queries the response was YES. [2023-08-30 02:17:56,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109939 conditions, 19980 events. 10029/19980 cut-off events. For 241120/241627 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 155057 event pairs, 2029 based on Foata normal form. 94/20035 useless extension candidates. Maximal degree in co-relation 109715. Up to 8254 conditions per place. [2023-08-30 02:17:56,600 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 654 selfloop transitions, 479 changer transitions 0/1139 dead transitions. [2023-08-30 02:17:56,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 1139 transitions, 18406 flow [2023-08-30 02:17:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-30 02:17:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-30 02:17:56,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 8535 transitions. [2023-08-30 02:17:56,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542081673306773 [2023-08-30 02:17:56,605 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 8535 transitions. [2023-08-30 02:17:56,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 8535 transitions. [2023-08-30 02:17:56,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:17:56,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 8535 transitions. [2023-08-30 02:17:56,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 266.71875) internal successors, (8535), 32 states have internal predecessors, (8535), 0 states have call successors, (0), 0 states 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 02:17:56,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 753.0) internal successors, (24849), 33 states have internal predecessors, (24849), 0 states have call successors, (0), 0 states 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 02:17:56,737 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 753.0) internal successors, (24849), 33 states have internal predecessors, (24849), 0 states have call successors, (0), 0 states 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 02:17:56,738 INFO L175 Difference]: Start difference. First operand has 628 places, 913 transitions, 13692 flow. Second operand 32 states and 8535 transitions. [2023-08-30 02:17:56,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 659 places, 1139 transitions, 18406 flow [2023-08-30 02:17:59,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 1139 transitions, 17786 flow, removed 176 selfloop flow, removed 10 redundant places. [2023-08-30 02:17:59,696 INFO L231 Difference]: Finished difference. Result has 661 places, 963 transitions, 15655 flow [2023-08-30 02:17:59,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=13099, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15655, PETRI_PLACES=661, PETRI_TRANSITIONS=963} [2023-08-30 02:17:59,698 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 522 predicate places. [2023-08-30 02:17:59,698 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 963 transitions, 15655 flow [2023-08-30 02:17:59,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 260.6818181818182) internal successors, (5735), 22 states have internal predecessors, (5735), 0 states have call successors, (0), 0 states 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 02:17:59,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:17:59,699 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:17:59,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-30 02:17:59,700 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:17:59,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:17:59,700 INFO L85 PathProgramCache]: Analyzing trace with hash 32128669, now seen corresponding path program 13 times [2023-08-30 02:17:59,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:17:59,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759811852] [2023-08-30 02:17:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:17:59,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:17:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:18:03,297 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 02:18:03,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:18:03,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759811852] [2023-08-30 02:18:03,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759811852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:18:03,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:18:03,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-30 02:18:03,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428264576] [2023-08-30 02:18:03,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:18:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 02:18:03,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:18:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 02:18:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2023-08-30 02:18:24,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-30 02:18:24,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 963 transitions, 15655 flow. Second operand has 23 states, 23 states have (on average 258.60869565217394) internal successors, (5948), 23 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states 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 02:18:24,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:18:24,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-30 02:18:24,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 02:18:37,629 INFO L130 PetriNetUnfolder]: 10433/20712 cut-off events. [2023-08-30 02:18:37,629 INFO L131 PetriNetUnfolder]: For 308245/308738 co-relation queries the response was YES. [2023-08-30 02:18:37,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120245 conditions, 20712 events. 10433/20712 cut-off events. For 308245/308738 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 161310 event pairs, 2053 based on Foata normal form. 254/20944 useless extension candidates. Maximal degree in co-relation 120009. Up to 10795 conditions per place. [2023-08-30 02:18:37,964 INFO L137 encePairwiseOnDemand]: 726/753 looper letters, 888 selfloop transitions, 297 changer transitions 0/1191 dead transitions. [2023-08-30 02:18:37,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 1191 transitions, 20640 flow [2023-08-30 02:18:37,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 02:18:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 02:18:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7939 transitions. [2023-08-30 02:18:37,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35143868968570163 [2023-08-30 02:18:37,969 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7939 transitions. [2023-08-30 02:18:37,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7939 transitions. [2023-08-30 02:18:37,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 02:18:37,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7939 transitions. [2023-08-30 02:18:37,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 264.6333333333333) internal successors, (7939), 30 states have internal predecessors, (7939), 0 states have call successors, (0), 0 states 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 02:18:37,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 02:18:37,983 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 753.0) internal successors, (23343), 31 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states 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 02:18:37,984 INFO L175 Difference]: Start difference. First operand has 661 places, 963 transitions, 15655 flow. Second operand 30 states and 7939 transitions. [2023-08-30 02:18:37,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 1191 transitions, 20640 flow [2023-08-30 02:18:41,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 1191 transitions, 20020 flow, removed 218 selfloop flow, removed 9 redundant places. [2023-08-30 02:18:41,849 INFO L231 Difference]: Finished difference. Result has 696 places, 1026 transitions, 17438 flow [2023-08-30 02:18:41,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=15065, PETRI_DIFFERENCE_MINUEND_PLACES=652, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17438, PETRI_PLACES=696, PETRI_TRANSITIONS=1026} [2023-08-30 02:18:41,851 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 557 predicate places. [2023-08-30 02:18:41,851 INFO L495 AbstractCegarLoop]: Abstraction has has 696 places, 1026 transitions, 17438 flow [2023-08-30 02:18:41,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 258.60869565217394) internal successors, (5948), 23 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states 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 02:18:41,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 02:18:41,853 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, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 02:18:41,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-30 02:18:41,854 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-30 02:18:41,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 02:18:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash 327272161, now seen corresponding path program 14 times [2023-08-30 02:18:41,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 02:18:41,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439220227] [2023-08-30 02:18:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 02:18:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 02:18:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 02:18:44,554 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 02:18:44,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 02:18:44,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439220227] [2023-08-30 02:18:44,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439220227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 02:18:44,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 02:18:44,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-30 02:18:44,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931499477] [2023-08-30 02:18:44,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 02:18:44,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 02:18:44,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 02:18:44,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 02:18:44,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-08-30 02:18:53,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 753 [2023-08-30 02:18:53,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 1026 transitions, 17438 flow. Second operand has 23 states, 23 states have (on average 259.60869565217394) internal successors, (5971), 23 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states 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 02:18:53,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 02:18:53,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 753 [2023-08-30 02:18:53,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15