./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 AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread/queue_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 AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-29 19:29:15,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:29:15,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:29:15,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:29:15,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:29:15,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:29:15,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:29:15,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:29:15,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:29:15,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:29:15,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:29:15,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:29:15,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:29:15,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:29:15,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:29:15,519 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:29:15,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:29:15,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:29:15,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:29:15,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-29 19:29:15,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-29 19:29:15,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-29 19:29:15,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:29:15,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:29:15,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:29:15,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:29:15,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:29:15,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:29:15,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:29:15,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:29:15,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-29 19:29:15,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-29 19:29:15,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:29:15,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:29:15,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:29:15,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:29:15,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:29:15,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:29:15,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:29:15,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:29:15,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:29:15,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:29:15,569 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:29:15,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:29:15,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:29:15,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:29:15,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:29:15,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:29:15,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:29:15,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:29:15,572 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:29:15,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:29:15,573 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:29:15,573 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:29:15,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:29:15,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:29:15,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:29:15,574 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:29:15,574 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:29:15,574 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:29:15,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:29:15,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:29:15,575 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:29:15,575 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:29:15,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:29:15,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:29:15,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:29:15,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:29:15,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:29:15,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:29:15,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:29:15,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:29:15,577 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:29:15,577 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-29 19:29:15,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-29 19:29:15,578 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:29:15,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:29:15,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:29:15,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:29:15,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:29:15,941 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:29:15,941 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:29:15,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_longest.i [2023-08-29 19:29:17,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:29:17,424 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:29:17,425 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longest.i [2023-08-29 19:29:17,438 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6376b5d8/fb4fef987ec34d2a9a8104df705d2e6e/FLAG522aeb14c [2023-08-29 19:29:17,454 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6376b5d8/fb4fef987ec34d2a9a8104df705d2e6e [2023-08-29 19:29:17,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:29:17,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:29:17,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:29:17,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:29:17,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:29:17,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:17,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2660ba98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17, skipping insertion in model container [2023-08-29 19:29:17,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:17,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:29:17,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:29:18,006 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] [2023-08-29 19:29:18,013 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] [2023-08-29 19:29:18,018 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] [2023-08-29 19:29:18,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:29:18,038 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:29:18,098 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] [2023-08-29 19:29:18,101 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] [2023-08-29 19:29:18,107 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] [2023-08-29 19:29:18,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:29:18,181 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:29:18,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18 WrapperNode [2023-08-29 19:29:18,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:29:18,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:29:18,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:29:18,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:29:18,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,248 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2023-08-29 19:29:18,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:29:18,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:29:18,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:29:18,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:29:18,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,290 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:29:18,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:29:18,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:29:18,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:29:18,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (1/1) ... [2023-08-29 19:29:18,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:29:18,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:29:18,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-29 19:29:18,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-29 19:29:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:29:18,377 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:29:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:29:18,377 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:29:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:29:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:29:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:29:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:29:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:29:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:29:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:29:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:29:18,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:29:18,380 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-29 19:29:18,553 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:29:18,554 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:29:19,078 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:29:19,088 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:29:19,088 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:29:19,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:29:19 BoogieIcfgContainer [2023-08-29 19:29:19,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:29:19,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:29:19,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:29:19,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:29:19,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:29:17" (1/3) ... [2023-08-29 19:29:19,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3c7b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:29:19, skipping insertion in model container [2023-08-29 19:29:19,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:18" (2/3) ... [2023-08-29 19:29:19,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3c7b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:29:19, skipping insertion in model container [2023-08-29 19:29:19,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:29:19" (3/3) ... [2023-08-29 19:29:19,097 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2023-08-29 19:29:19,112 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:29:19,112 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-08-29 19:29:19,113 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:29:19,274 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:29:19,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 338 transitions, 692 flow [2023-08-29 19:29:19,432 INFO L130 PetriNetUnfolder]: 15/336 cut-off events. [2023-08-29 19:29:19,433 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:29:19,445 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. [2023-08-29 19:29:19,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 338 transitions, 692 flow [2023-08-29 19:29:19,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 332 transitions, 676 flow [2023-08-29 19:29:19,464 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:29:19,476 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-29 19:29:19,483 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-29 19:29:19,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 324 places, 332 transitions, 676 flow [2023-08-29 19:29:19,549 INFO L130 PetriNetUnfolder]: 15/332 cut-off events. [2023-08-29 19:29:19,550 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:29:19,553 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. [2023-08-29 19:29:19,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 28780 [2023-08-29 19:29:32,267 INFO L134 LiptonReduction]: Checked pairs total: 105796 [2023-08-29 19:29:32,268 INFO L136 LiptonReduction]: Total number of compositions: 415 [2023-08-29 19:29:32,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:29:32,286 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;@61bb6d45, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:29:32,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-08-29 19:29:32,287 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:29:32,288 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:29:32,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:32,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:29:32,289 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)] === [2023-08-29 19:29:32,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:32,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1407, now seen corresponding path program 1 times [2023-08-29 19:29:32,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:32,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794795607] [2023-08-29 19:29:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:32,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:32,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:32,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794795607] [2023-08-29 19:29:32,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794795607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:32,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:32,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:29:32,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122607558] [2023-08-29 19:29:32,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:32,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:29:32,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:29:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:29:32,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 753 [2023-08-29 19:29:32,465 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) [2023-08-29 19:29:32,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:32,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 753 [2023-08-29 19:29:32,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:33,649 INFO L130 PetriNetUnfolder]: 7123/11650 cut-off events. [2023-08-29 19:29:33,649 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-29 19:29:33,660 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. [2023-08-29 19:29:33,718 INFO L137 encePairwiseOnDemand]: 704/753 looper letters, 82 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2023-08-29 19:29:33,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 362 flow [2023-08-29 19:29:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:29:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:29:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 781 transitions. [2023-08-29 19:29:33,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185922974767596 [2023-08-29 19:29:33,736 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 781 transitions. [2023-08-29 19:29:33,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 781 transitions. [2023-08-29 19:29:33,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:33,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 781 transitions. [2023-08-29 19:29:33,748 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) [2023-08-29 19:29:33,753 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) [2023-08-29 19:29:33,755 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) [2023-08-29 19:29:33,756 INFO L175 Difference]: Start difference. First operand has 139 places, 142 transitions, 296 flow. Second operand 2 states and 781 transitions. [2023-08-29 19:29:33,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 362 flow [2023-08-29 19:29:33,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-29 19:29:33,767 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 190 flow [2023-08-29 19:29:33,768 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} [2023-08-29 19:29:33,772 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2023-08-29 19:29:33,773 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 190 flow [2023-08-29 19:29:33,773 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) [2023-08-29 19:29:33,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:33,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:33,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:29:33,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:33,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:33,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1397048, now seen corresponding path program 1 times [2023-08-29 19:29:33,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003078326] [2023-08-29 19:29:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:33,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:34,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:34,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003078326] [2023-08-29 19:29:34,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003078326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:34,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:34,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763177399] [2023-08-29 19:29:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:34,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:34,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:34,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:34,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 753 [2023-08-29 19:29:34,259 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) [2023-08-29 19:29:34,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:34,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 753 [2023-08-29 19:29:34,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:35,144 INFO L130 PetriNetUnfolder]: 6353/10400 cut-off events. [2023-08-29 19:29:35,146 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 19:29:35,156 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. [2023-08-29 19:29:35,203 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 76 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-29 19:29:35,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 89 transitions, 338 flow [2023-08-29 19:29:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-29 19:29:35,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639220894200974 [2023-08-29 19:29:35,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-29 19:29:35,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-29 19:29:35,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:35,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-29 19:29:35,211 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) [2023-08-29 19:29:35,215 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) [2023-08-29 19:29:35,217 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) [2023-08-29 19:29:35,217 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 190 flow. Second operand 3 states and 1048 transitions. [2023-08-29 19:29:35,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 89 transitions, 338 flow [2023-08-29 19:29:35,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:29:35,221 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 186 flow [2023-08-29 19:29:35,221 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} [2023-08-29 19:29:35,222 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -52 predicate places. [2023-08-29 19:29:35,222 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 186 flow [2023-08-29 19:29:35,223 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) [2023-08-29 19:29:35,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:35,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:29:35,223 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:35,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:35,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1397046, now seen corresponding path program 1 times [2023-08-29 19:29:35,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:35,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887752448] [2023-08-29 19:29:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:35,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:35,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:35,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887752448] [2023-08-29 19:29:35,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887752448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:35,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:35,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:35,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654418218] [2023-08-29 19:29:35,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:35,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:35,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:35,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 753 [2023-08-29 19:29:35,642 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) [2023-08-29 19:29:35,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:35,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 753 [2023-08-29 19:29:35,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:36,417 INFO L130 PetriNetUnfolder]: 5480/8975 cut-off events. [2023-08-29 19:29:36,417 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 19:29:36,431 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. [2023-08-29 19:29:36,470 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 72 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-29 19:29:36,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 322 flow [2023-08-29 19:29:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-08-29 19:29:36,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46215139442231074 [2023-08-29 19:29:36,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-08-29 19:29:36,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-08-29 19:29:36,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:36,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-08-29 19:29:36,477 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) [2023-08-29 19:29:36,481 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) [2023-08-29 19:29:36,483 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) [2023-08-29 19:29:36,483 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 186 flow. Second operand 3 states and 1044 transitions. [2023-08-29 19:29:36,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 322 flow [2023-08-29 19:29:36,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:36,486 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 174 flow [2023-08-29 19:29:36,486 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} [2023-08-29 19:29:36,487 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-29 19:29:36,487 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 174 flow [2023-08-29 19:29:36,488 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) [2023-08-29 19:29:36,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:36,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:36,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:29:36,488 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)] === [2023-08-29 19:29:36,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:36,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1396972, now seen corresponding path program 1 times [2023-08-29 19:29:36,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:36,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58372295] [2023-08-29 19:29:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:36,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:36,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:36,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58372295] [2023-08-29 19:29:36,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58372295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:36,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:36,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442179578] [2023-08-29 19:29:36,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:36,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:36,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:36,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-29 19:29:36,682 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) [2023-08-29 19:29:36,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:36,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-29 19:29:36,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:37,321 INFO L130 PetriNetUnfolder]: 5420/8856 cut-off events. [2023-08-29 19:29:37,321 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 19:29:37,339 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. [2023-08-29 19:29:37,374 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 69 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-29 19:29:37,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 312 flow [2023-08-29 19:29:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-29 19:29:37,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-29 19:29:37,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-29 19:29:37,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-29 19:29:37,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:37,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-29 19:29:37,381 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) [2023-08-29 19:29:37,385 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) [2023-08-29 19:29:37,386 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) [2023-08-29 19:29:37,386 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 174 flow. Second operand 3 states and 1021 transitions. [2023-08-29 19:29:37,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 312 flow [2023-08-29 19:29:37,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:29:37,389 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2023-08-29 19:29:37,389 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} [2023-08-29 19:29:37,390 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2023-08-29 19:29:37,390 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2023-08-29 19:29:37,390 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) [2023-08-29 19:29:37,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:37,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:37,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:29:37,391 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)] === [2023-08-29 19:29:37,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:37,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1396973, now seen corresponding path program 1 times [2023-08-29 19:29:37,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:37,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95137284] [2023-08-29 19:29:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:37,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:37,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:37,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95137284] [2023-08-29 19:29:37,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95137284] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:37,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:37,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:37,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107139466] [2023-08-29 19:29:37,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:37,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:37,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:37,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:37,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:37,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-29 19:29:37,595 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) [2023-08-29 19:29:37,595 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:37,595 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-29 19:29:37,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:38,185 INFO L130 PetriNetUnfolder]: 5360/8737 cut-off events. [2023-08-29 19:29:38,185 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 19:29:38,200 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. [2023-08-29 19:29:38,233 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 67 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-29 19:29:38,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 307 flow [2023-08-29 19:29:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-29 19:29:38,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563966356795042 [2023-08-29 19:29:38,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-29 19:29:38,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-29 19:29:38,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:38,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-29 19:29:38,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 343.6666666666667) internal successors, (1031), 3 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:38,243 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) [2023-08-29 19:29:38,245 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) [2023-08-29 19:29:38,245 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 3 states and 1031 transitions. [2023-08-29 19:29:38,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 307 flow [2023-08-29 19:29:38,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 80 transitions, 303 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:38,248 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 169 flow [2023-08-29 19:29:38,248 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} [2023-08-29 19:29:38,250 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2023-08-29 19:29:38,251 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 169 flow [2023-08-29 19:29:38,251 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) [2023-08-29 19:29:38,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:38,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:29:38,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:29:38,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:38,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:38,252 INFO L85 PathProgramCache]: Analyzing trace with hash 43308809, now seen corresponding path program 1 times [2023-08-29 19:29:38,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:38,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695887533] [2023-08-29 19:29:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:38,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:38,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:38,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695887533] [2023-08-29 19:29:38,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695887533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:38,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:38,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262980022] [2023-08-29 19:29:38,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:38,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:38,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:38,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:38,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:38,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 753 [2023-08-29 19:29:38,986 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) [2023-08-29 19:29:38,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:38,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 753 [2023-08-29 19:29:38,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:39,651 INFO L130 PetriNetUnfolder]: 5645/9113 cut-off events. [2023-08-29 19:29:39,651 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 19:29:39,670 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. [2023-08-29 19:29:39,706 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 71 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-08-29 19:29:39,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 335 flow [2023-08-29 19:29:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:29:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:29:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1298 transitions. [2023-08-29 19:29:39,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4309428950863214 [2023-08-29 19:29:39,710 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1298 transitions. [2023-08-29 19:29:39,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1298 transitions. [2023-08-29 19:29:39,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:39,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1298 transitions. [2023-08-29 19:29:39,714 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) [2023-08-29 19:29:39,719 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) [2023-08-29 19:29:39,721 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) [2023-08-29 19:29:39,721 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 169 flow. Second operand 4 states and 1298 transitions. [2023-08-29 19:29:39,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 335 flow [2023-08-29 19:29:39,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:39,723 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 204 flow [2023-08-29 19:29:39,724 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} [2023-08-29 19:29:39,724 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-29 19:29:39,725 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 204 flow [2023-08-29 19:29:39,726 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) [2023-08-29 19:29:39,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:39,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:39,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:29:39,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:39,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:39,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1342574226, now seen corresponding path program 1 times [2023-08-29 19:29:39,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:39,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452953224] [2023-08-29 19:29:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:39,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:39,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:39,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452953224] [2023-08-29 19:29:39,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452953224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:39,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:39,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:29:39,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189219304] [2023-08-29 19:29:39,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:39,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:29:39,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:29:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:29:40,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 753 [2023-08-29 19:29:40,213 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) [2023-08-29 19:29:40,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:40,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 753 [2023-08-29 19:29:40,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:40,806 INFO L130 PetriNetUnfolder]: 4666/7530 cut-off events. [2023-08-29 19:29:40,806 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-08-29 19:29:40,825 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. [2023-08-29 19:29:40,853 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 112 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-08-29 19:29:40,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 526 flow [2023-08-29 19:29:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:29:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:29:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1629 transitions. [2023-08-29 19:29:40,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43266932270916336 [2023-08-29 19:29:40,858 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1629 transitions. [2023-08-29 19:29:40,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1629 transitions. [2023-08-29 19:29:40,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:40,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1629 transitions. [2023-08-29 19:29:40,862 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) [2023-08-29 19:29:40,867 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) [2023-08-29 19:29:40,868 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) [2023-08-29 19:29:40,868 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 204 flow. Second operand 5 states and 1629 transitions. [2023-08-29 19:29:40,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 526 flow [2023-08-29 19:29:40,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-29 19:29:40,873 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 199 flow [2023-08-29 19:29:40,873 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} [2023-08-29 19:29:40,874 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-29 19:29:40,874 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 199 flow [2023-08-29 19:29:40,875 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) [2023-08-29 19:29:40,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:40,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:40,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:29:40,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:40,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1342534681, now seen corresponding path program 1 times [2023-08-29 19:29:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:40,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629502151] [2023-08-29 19:29:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:40,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:41,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:41,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629502151] [2023-08-29 19:29:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629502151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:41,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:41,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:29:41,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855552151] [2023-08-29 19:29:41,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:41,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:29:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:41,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:29:41,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:29:43,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 753 [2023-08-29 19:29:43,756 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) [2023-08-29 19:29:43,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:43,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 753 [2023-08-29 19:29:43,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:45,780 INFO L130 PetriNetUnfolder]: 5515/8889 cut-off events. [2023-08-29 19:29:45,780 INFO L131 PetriNetUnfolder]: For 932/932 co-relation queries the response was YES. [2023-08-29 19:29:45,801 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. [2023-08-29 19:29:45,832 INFO L137 encePairwiseOnDemand]: 746/753 looper letters, 98 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2023-08-29 19:29:45,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 118 transitions, 511 flow [2023-08-29 19:29:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:29:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:29:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1324 transitions. [2023-08-29 19:29:45,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395750332005312 [2023-08-29 19:29:45,837 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1324 transitions. [2023-08-29 19:29:45,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1324 transitions. [2023-08-29 19:29:45,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:45,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1324 transitions. [2023-08-29 19:29:45,840 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) [2023-08-29 19:29:45,843 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) [2023-08-29 19:29:45,844 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) [2023-08-29 19:29:45,844 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 199 flow. Second operand 4 states and 1324 transitions. [2023-08-29 19:29:45,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 118 transitions, 511 flow [2023-08-29 19:29:45,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 118 transitions, 498 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:29:45,847 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 257 flow [2023-08-29 19:29:45,848 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} [2023-08-29 19:29:45,848 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-29 19:29:45,848 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 257 flow [2023-08-29 19:29:45,849 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) [2023-08-29 19:29:45,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:45,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:45,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:29:45,850 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)] === [2023-08-29 19:29:45,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:45,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523318, now seen corresponding path program 1 times [2023-08-29 19:29:45,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:45,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719223068] [2023-08-29 19:29:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:45,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:45,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:45,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719223068] [2023-08-29 19:29:45,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719223068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:45,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:45,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:45,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784889071] [2023-08-29 19:29:45,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:45,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:45,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:45,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:46,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 753 [2023-08-29 19:29:46,154 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) [2023-08-29 19:29:46,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:46,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 753 [2023-08-29 19:29:46,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:46,605 INFO L130 PetriNetUnfolder]: 3815/6378 cut-off events. [2023-08-29 19:29:46,605 INFO L131 PetriNetUnfolder]: For 690/690 co-relation queries the response was YES. [2023-08-29 19:29:46,615 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. [2023-08-29 19:29:46,638 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 70 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-29 19:29:46,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 399 flow [2023-08-29 19:29:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:46,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-29 19:29:46,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45108455068614434 [2023-08-29 19:29:46,642 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-29 19:29:46,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-29 19:29:46,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:46,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-29 19:29:46,645 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) [2023-08-29 19:29:46,649 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) [2023-08-29 19:29:46,650 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) [2023-08-29 19:29:46,650 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 257 flow. Second operand 3 states and 1019 transitions. [2023-08-29 19:29:46,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 399 flow [2023-08-29 19:29:46,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 86 transitions, 397 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-29 19:29:46,654 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 257 flow [2023-08-29 19:29:46,654 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} [2023-08-29 19:29:46,654 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-29 19:29:46,655 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 257 flow [2023-08-29 19:29:46,656 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) [2023-08-29 19:29:46,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:46,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:29:46,656 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)] === [2023-08-29 19:29:46,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:46,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523317, now seen corresponding path program 1 times [2023-08-29 19:29:46,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:46,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928140429] [2023-08-29 19:29:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:46,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:46,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:46,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928140429] [2023-08-29 19:29:46,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928140429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:46,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:46,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32804049] [2023-08-29 19:29:46,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:46,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:46,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:46,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:46,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:46,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 753 [2023-08-29 19:29:46,926 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) [2023-08-29 19:29:46,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:46,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 753 [2023-08-29 19:29:46,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:47,303 INFO L130 PetriNetUnfolder]: 2361/4108 cut-off events. [2023-08-29 19:29:47,303 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2023-08-29 19:29:47,313 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. [2023-08-29 19:29:47,327 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 69 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-29 19:29:47,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 85 transitions, 397 flow [2023-08-29 19:29:47,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1000 transitions. [2023-08-29 19:29:47,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426737494466578 [2023-08-29 19:29:47,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1000 transitions. [2023-08-29 19:29:47,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1000 transitions. [2023-08-29 19:29:47,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:47,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1000 transitions. [2023-08-29 19:29:47,335 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) [2023-08-29 19:29:47,338 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) [2023-08-29 19:29:47,339 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) [2023-08-29 19:29:47,339 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 257 flow. Second operand 3 states and 1000 transitions. [2023-08-29 19:29:47,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 85 transitions, 397 flow [2023-08-29 19:29:47,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:47,342 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 255 flow [2023-08-29 19:29:47,343 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} [2023-08-29 19:29:47,343 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-29 19:29:47,343 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 255 flow [2023-08-29 19:29:47,344 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) [2023-08-29 19:29:47,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:47,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:47,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:29:47,344 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:47,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1342575601, now seen corresponding path program 2 times [2023-08-29 19:29:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:47,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157329564] [2023-08-29 19:29:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:47,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:48,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:48,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157329564] [2023-08-29 19:29:48,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157329564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:48,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:48,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:29:48,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926146620] [2023-08-29 19:29:48,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:48,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:29:48,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:29:48,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:29:49,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 753 [2023-08-29 19:29:49,760 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) [2023-08-29 19:29:49,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:49,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 753 [2023-08-29 19:29:49,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:51,048 INFO L130 PetriNetUnfolder]: 2440/4159 cut-off events. [2023-08-29 19:29:51,049 INFO L131 PetriNetUnfolder]: For 599/599 co-relation queries the response was YES. [2023-08-29 19:29:51,055 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. [2023-08-29 19:29:51,066 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 91 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2023-08-29 19:29:51,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 112 transitions, 524 flow [2023-08-29 19:29:51,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:29:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:29:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1315 transitions. [2023-08-29 19:29:51,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658698539176627 [2023-08-29 19:29:51,070 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1315 transitions. [2023-08-29 19:29:51,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1315 transitions. [2023-08-29 19:29:51,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:51,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1315 transitions. [2023-08-29 19:29:51,073 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) [2023-08-29 19:29:51,077 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) [2023-08-29 19:29:51,077 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) [2023-08-29 19:29:51,078 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 255 flow. Second operand 4 states and 1315 transitions. [2023-08-29 19:29:51,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 112 transitions, 524 flow [2023-08-29 19:29:51,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 112 transitions, 518 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:51,081 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 294 flow [2023-08-29 19:29:51,082 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} [2023-08-29 19:29:51,082 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -53 predicate places. [2023-08-29 19:29:51,082 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 294 flow [2023-08-29 19:29:51,083 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) [2023-08-29 19:29:51,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:51,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:51,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:29:51,084 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:51,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:51,084 INFO L85 PathProgramCache]: Analyzing trace with hash 379604633, now seen corresponding path program 1 times [2023-08-29 19:29:51,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:51,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339878156] [2023-08-29 19:29:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:51,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:51,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:51,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339878156] [2023-08-29 19:29:51,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339878156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:51,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:51,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:51,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934573635] [2023-08-29 19:29:51,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:51,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:51,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:51,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-29 19:29:51,150 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) [2023-08-29 19:29:51,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:51,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-29 19:29:51,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:51,421 INFO L130 PetriNetUnfolder]: 1607/2797 cut-off events. [2023-08-29 19:29:51,421 INFO L131 PetriNetUnfolder]: For 233/233 co-relation queries the response was YES. [2023-08-29 19:29:51,427 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. [2023-08-29 19:29:51,435 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 91 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2023-08-29 19:29:51,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 106 transitions, 478 flow [2023-08-29 19:29:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-08-29 19:29:51,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46569278441788403 [2023-08-29 19:29:51,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-08-29 19:29:51,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-08-29 19:29:51,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:51,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-08-29 19:29:51,442 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) [2023-08-29 19:29:51,444 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) [2023-08-29 19:29:51,445 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) [2023-08-29 19:29:51,445 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 294 flow. Second operand 3 states and 1052 transitions. [2023-08-29 19:29:51,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 106 transitions, 478 flow [2023-08-29 19:29:51,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 106 transitions, 443 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-29 19:29:51,449 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 209 flow [2023-08-29 19:29:51,449 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} [2023-08-29 19:29:51,450 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2023-08-29 19:29:51,450 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 209 flow [2023-08-29 19:29:51,451 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) [2023-08-29 19:29:51,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:51,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:51,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:29:51,452 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:51,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash 236453581, now seen corresponding path program 1 times [2023-08-29 19:29:51,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:51,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588746853] [2023-08-29 19:29:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:51,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:52,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:52,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588746853] [2023-08-29 19:29:52,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588746853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:52,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:52,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:29:52,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45323618] [2023-08-29 19:29:52,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:52,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:29:52,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:29:52,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:29:54,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 753 [2023-08-29 19:29:54,689 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) [2023-08-29 19:29:54,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:54,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 753 [2023-08-29 19:29:54,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:56,451 INFO L130 PetriNetUnfolder]: 1662/2938 cut-off events. [2023-08-29 19:29:56,452 INFO L131 PetriNetUnfolder]: For 187/187 co-relation queries the response was YES. [2023-08-29 19:29:56,456 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. [2023-08-29 19:29:56,464 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 67 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2023-08-29 19:29:56,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 393 flow [2023-08-29 19:29:56,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:29:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:29:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2171 transitions. [2023-08-29 19:29:56,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118763043065832 [2023-08-29 19:29:56,470 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2171 transitions. [2023-08-29 19:29:56,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2171 transitions. [2023-08-29 19:29:56,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:56,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2171 transitions. [2023-08-29 19:29:56,475 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) [2023-08-29 19:29:56,481 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) [2023-08-29 19:29:56,482 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) [2023-08-29 19:29:56,482 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 209 flow. Second operand 7 states and 2171 transitions. [2023-08-29 19:29:56,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 393 flow [2023-08-29 19:29:56,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:29:56,485 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 269 flow [2023-08-29 19:29:56,485 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} [2023-08-29 19:29:56,486 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2023-08-29 19:29:56,486 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 269 flow [2023-08-29 19:29:56,486 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) [2023-08-29 19:29:56,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:56,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:56,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:29:56,487 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:56,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:56,487 INFO L85 PathProgramCache]: Analyzing trace with hash 138579933, now seen corresponding path program 1 times [2023-08-29 19:29:56,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:56,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826639542] [2023-08-29 19:29:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:56,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:56,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826639542] [2023-08-29 19:29:56,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826639542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:56,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:56,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:56,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47610587] [2023-08-29 19:29:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:56,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:56,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-29 19:29:56,853 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) [2023-08-29 19:29:56,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:56,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-29 19:29:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:57,107 INFO L130 PetriNetUnfolder]: 1548/2769 cut-off events. [2023-08-29 19:29:57,108 INFO L131 PetriNetUnfolder]: For 231/231 co-relation queries the response was YES. [2023-08-29 19:29:57,113 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. [2023-08-29 19:29:57,120 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 68 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-29 19:29:57,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 84 transitions, 407 flow [2023-08-29 19:29:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:29:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:29:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1342 transitions. [2023-08-29 19:29:57,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4455511288180611 [2023-08-29 19:29:57,124 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1342 transitions. [2023-08-29 19:29:57,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1342 transitions. [2023-08-29 19:29:57,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:57,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1342 transitions. [2023-08-29 19:29:57,129 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) [2023-08-29 19:29:57,132 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) [2023-08-29 19:29:57,133 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) [2023-08-29 19:29:57,133 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 269 flow. Second operand 4 states and 1342 transitions. [2023-08-29 19:29:57,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 84 transitions, 407 flow [2023-08-29 19:29:57,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 389 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 19:29:57,135 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 253 flow [2023-08-29 19:29:57,136 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} [2023-08-29 19:29:57,137 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -51 predicate places. [2023-08-29 19:29:57,137 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 253 flow [2023-08-29 19:29:57,137 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) [2023-08-29 19:29:57,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:57,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:57,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:29:57,138 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:57,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:57,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1454248524, now seen corresponding path program 1 times [2023-08-29 19:29:57,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:57,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307776385] [2023-08-29 19:29:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:57,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:57,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307776385] [2023-08-29 19:29:57,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307776385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:57,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:57,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:57,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959890247] [2023-08-29 19:29:57,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:57,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:57,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:57,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:57,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:57,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 753 [2023-08-29 19:29:57,485 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) [2023-08-29 19:29:57,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:57,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 753 [2023-08-29 19:29:57,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:57,717 INFO L130 PetriNetUnfolder]: 1454/2575 cut-off events. [2023-08-29 19:29:57,717 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-29 19:29:57,721 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. [2023-08-29 19:29:57,726 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 66 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-29 19:29:57,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 81 transitions, 383 flow [2023-08-29 19:29:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 992 transitions. [2023-08-29 19:29:57,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43913235945108453 [2023-08-29 19:29:57,730 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 992 transitions. [2023-08-29 19:29:57,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 992 transitions. [2023-08-29 19:29:57,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:57,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 992 transitions. [2023-08-29 19:29:57,733 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) [2023-08-29 19:29:57,735 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) [2023-08-29 19:29:57,736 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) [2023-08-29 19:29:57,736 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 253 flow. Second operand 3 states and 992 transitions. [2023-08-29 19:29:57,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 81 transitions, 383 flow [2023-08-29 19:29:57,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 380 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:57,739 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 248 flow [2023-08-29 19:29:57,739 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} [2023-08-29 19:29:57,739 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-29 19:29:57,739 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 248 flow [2023-08-29 19:29:57,740 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) [2023-08-29 19:29:57,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:57,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:57,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:29:57,740 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:57,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1009501, now seen corresponding path program 1 times [2023-08-29 19:29:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:57,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783906724] [2023-08-29 19:29:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:57,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:57,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:57,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783906724] [2023-08-29 19:29:57,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783906724] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:57,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:57,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:29:57,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712301062] [2023-08-29 19:29:57,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:57,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:57,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:57,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:57,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-29 19:29:57,781 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) [2023-08-29 19:29:57,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:57,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-29 19:29:57,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:58,025 INFO L130 PetriNetUnfolder]: 1444/2565 cut-off events. [2023-08-29 19:29:58,025 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2023-08-29 19:29:58,029 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. [2023-08-29 19:29:58,035 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 70 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-29 19:29:58,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 411 flow [2023-08-29 19:29:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1026 transitions. [2023-08-29 19:29:58,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541832669322709 [2023-08-29 19:29:58,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1026 transitions. [2023-08-29 19:29:58,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1026 transitions. [2023-08-29 19:29:58,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:58,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1026 transitions. [2023-08-29 19:29:58,041 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) [2023-08-29 19:29:58,044 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) [2023-08-29 19:29:58,045 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) [2023-08-29 19:29:58,045 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 248 flow. Second operand 3 states and 1026 transitions. [2023-08-29 19:29:58,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 411 flow [2023-08-29 19:29:58,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:58,047 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 250 flow [2023-08-29 19:29:58,047 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} [2023-08-29 19:29:58,048 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-29 19:29:58,048 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 250 flow [2023-08-29 19:29:58,048 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) [2023-08-29 19:29:58,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:58,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:58,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:29:58,049 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:58,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:58,049 INFO L85 PathProgramCache]: Analyzing trace with hash 972426745, now seen corresponding path program 1 times [2023-08-29 19:29:58,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:58,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906233636] [2023-08-29 19:29:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:58,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:58,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:58,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906233636] [2023-08-29 19:29:58,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906233636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:58,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:58,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:29:58,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461682098] [2023-08-29 19:29:58,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:58,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:29:58,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:29:58,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:29:59,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 753 [2023-08-29 19:29:59,210 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) [2023-08-29 19:29:59,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:59,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 753 [2023-08-29 19:29:59,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:59,597 INFO L130 PetriNetUnfolder]: 1696/2963 cut-off events. [2023-08-29 19:29:59,597 INFO L131 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2023-08-29 19:29:59,601 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. [2023-08-29 19:29:59,606 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 91 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2023-08-29 19:29:59,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 563 flow [2023-08-29 19:29:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:29:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:29:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1873 transitions. [2023-08-29 19:29:59,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41456396635679504 [2023-08-29 19:29:59,610 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1873 transitions. [2023-08-29 19:29:59,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1873 transitions. [2023-08-29 19:29:59,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:59,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1873 transitions. [2023-08-29 19:29:59,614 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) [2023-08-29 19:29:59,618 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) [2023-08-29 19:29:59,619 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) [2023-08-29 19:29:59,619 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 250 flow. Second operand 6 states and 1873 transitions. [2023-08-29 19:29:59,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 563 flow [2023-08-29 19:29:59,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 549 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:59,623 INFO L231 Difference]: Finished difference. Result has 92 places, 86 transitions, 336 flow [2023-08-29 19:29:59,623 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} [2023-08-29 19:29:59,623 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -47 predicate places. [2023-08-29 19:29:59,624 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 86 transitions, 336 flow [2023-08-29 19:29:59,624 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) [2023-08-29 19:29:59,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:59,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:59,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:29:59,625 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:59,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:59,625 INFO L85 PathProgramCache]: Analyzing trace with hash -181419743, now seen corresponding path program 2 times [2023-08-29 19:29:59,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:59,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652811309] [2023-08-29 19:29:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:59,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:00,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:00,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652811309] [2023-08-29 19:30:00,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652811309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:00,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:00,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:30:00,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002095539] [2023-08-29 19:30:00,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:00,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:30:00,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:00,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:30:00,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:30:00,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 753 [2023-08-29 19:30:00,686 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) [2023-08-29 19:30:00,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:00,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 753 [2023-08-29 19:30:00,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:01,079 INFO L130 PetriNetUnfolder]: 1774/3099 cut-off events. [2023-08-29 19:30:01,080 INFO L131 PetriNetUnfolder]: For 453/453 co-relation queries the response was YES. [2023-08-29 19:30:01,085 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. [2023-08-29 19:30:01,091 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 94 selfloop transitions, 19 changer transitions 0/122 dead transitions. [2023-08-29 19:30:01,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 653 flow [2023-08-29 19:30:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:30:01,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:30:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2167 transitions. [2023-08-29 19:30:01,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41111743502181747 [2023-08-29 19:30:01,097 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2167 transitions. [2023-08-29 19:30:01,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2167 transitions. [2023-08-29 19:30:01,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:01,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2167 transitions. [2023-08-29 19:30:01,101 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) [2023-08-29 19:30:01,107 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) [2023-08-29 19:30:01,108 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) [2023-08-29 19:30:01,108 INFO L175 Difference]: Start difference. First operand has 92 places, 86 transitions, 336 flow. Second operand 7 states and 2167 transitions. [2023-08-29 19:30:01,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 653 flow [2023-08-29 19:30:01,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 647 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-29 19:30:01,113 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 406 flow [2023-08-29 19:30:01,113 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} [2023-08-29 19:30:01,113 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -39 predicate places. [2023-08-29 19:30:01,113 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 406 flow [2023-08-29 19:30:01,114 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) [2023-08-29 19:30:01,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:01,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:01,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:30:01,115 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:01,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:01,115 INFO L85 PathProgramCache]: Analyzing trace with hash -247492645, now seen corresponding path program 3 times [2023-08-29 19:30:01,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:01,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479766695] [2023-08-29 19:30:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:01,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:01,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:01,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479766695] [2023-08-29 19:30:01,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479766695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:01,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:01,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-29 19:30:01,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632109009] [2023-08-29 19:30:01,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:01,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:30:01,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:30:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:30:03,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 753 [2023-08-29 19:30:03,972 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) [2023-08-29 19:30:03,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:03,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 753 [2023-08-29 19:30:03,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:05,435 INFO L130 PetriNetUnfolder]: 1730/3049 cut-off events. [2023-08-29 19:30:05,436 INFO L131 PetriNetUnfolder]: For 725/725 co-relation queries the response was YES. [2023-08-29 19:30:05,441 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. [2023-08-29 19:30:05,447 INFO L137 encePairwiseOnDemand]: 746/753 looper letters, 88 selfloop transitions, 19 changer transitions 0/116 dead transitions. [2023-08-29 19:30:05,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 116 transitions, 668 flow [2023-08-29 19:30:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:30:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:30:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2173 transitions. [2023-08-29 19:30:05,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41225573894896606 [2023-08-29 19:30:05,452 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2173 transitions. [2023-08-29 19:30:05,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2173 transitions. [2023-08-29 19:30:05,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:05,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2173 transitions. [2023-08-29 19:30:05,457 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) [2023-08-29 19:30:05,461 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) [2023-08-29 19:30:05,462 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) [2023-08-29 19:30:05,462 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 406 flow. Second operand 7 states and 2173 transitions. [2023-08-29 19:30:05,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 116 transitions, 668 flow [2023-08-29 19:30:05,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 116 transitions, 647 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 19:30:05,467 INFO L231 Difference]: Finished difference. Result has 102 places, 86 transitions, 406 flow [2023-08-29 19:30:05,468 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} [2023-08-29 19:30:05,468 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -37 predicate places. [2023-08-29 19:30:05,468 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 86 transitions, 406 flow [2023-08-29 19:30:05,469 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) [2023-08-29 19:30:05,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:05,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:05,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 19:30:05,469 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:05,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:05,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1611999738, now seen corresponding path program 1 times [2023-08-29 19:30:05,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:05,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947217555] [2023-08-29 19:30:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:05,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:06,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:06,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947217555] [2023-08-29 19:30:06,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947217555] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:06,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:06,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-29 19:30:06,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283046179] [2023-08-29 19:30:06,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:06,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 19:30:06,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:06,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 19:30:06,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-29 19:30:07,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-29 19:30:07,575 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) [2023-08-29 19:30:07,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:07,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-29 19:30:07,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:08,138 INFO L130 PetriNetUnfolder]: 1729/3050 cut-off events. [2023-08-29 19:30:08,138 INFO L131 PetriNetUnfolder]: For 975/975 co-relation queries the response was YES. [2023-08-29 19:30:08,143 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. [2023-08-29 19:30:08,149 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 78 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2023-08-29 19:30:08,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 104 transitions, 646 flow [2023-08-29 19:30:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:30:08,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:30:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2606 transitions. [2023-08-29 19:30:08,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845359303526634 [2023-08-29 19:30:08,154 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2606 transitions. [2023-08-29 19:30:08,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2606 transitions. [2023-08-29 19:30:08,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:08,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2606 transitions. [2023-08-29 19:30:08,160 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) [2023-08-29 19:30:08,165 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) [2023-08-29 19:30:08,166 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) [2023-08-29 19:30:08,166 INFO L175 Difference]: Start difference. First operand has 102 places, 86 transitions, 406 flow. Second operand 9 states and 2606 transitions. [2023-08-29 19:30:08,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 104 transitions, 646 flow [2023-08-29 19:30:08,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 104 transitions, 608 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 19:30:08,171 INFO L231 Difference]: Finished difference. Result has 107 places, 93 transitions, 451 flow [2023-08-29 19:30:08,171 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} [2023-08-29 19:30:08,172 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -32 predicate places. [2023-08-29 19:30:08,172 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 93 transitions, 451 flow [2023-08-29 19:30:08,173 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) [2023-08-29 19:30:08,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:08,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:08,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 19:30:08,173 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:08,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:08,174 INFO L85 PathProgramCache]: Analyzing trace with hash -580033310, now seen corresponding path program 1 times [2023-08-29 19:30:08,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:08,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326836497] [2023-08-29 19:30:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:08,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:08,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:08,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326836497] [2023-08-29 19:30:08,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326836497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:08,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:08,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:30:08,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003596952] [2023-08-29 19:30:08,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:08,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:30:08,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:08,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:30:08,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:30:11,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-29 19:30:11,095 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) [2023-08-29 19:30:11,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:11,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-29 19:30:11,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:11,768 INFO L130 PetriNetUnfolder]: 1889/3315 cut-off events. [2023-08-29 19:30:11,769 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2023-08-29 19:30:11,778 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. [2023-08-29 19:30:11,785 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 117 selfloop transitions, 25 changer transitions 0/151 dead transitions. [2023-08-29 19:30:11,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 151 transitions, 867 flow [2023-08-29 19:30:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:30:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:30:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2644 transitions. [2023-08-29 19:30:11,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39014313117898775 [2023-08-29 19:30:11,791 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2644 transitions. [2023-08-29 19:30:11,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2644 transitions. [2023-08-29 19:30:11,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:11,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2644 transitions. [2023-08-29 19:30:11,799 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) [2023-08-29 19:30:11,804 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) [2023-08-29 19:30:11,804 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) [2023-08-29 19:30:11,805 INFO L175 Difference]: Start difference. First operand has 107 places, 93 transitions, 451 flow. Second operand 9 states and 2644 transitions. [2023-08-29 19:30:11,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 151 transitions, 867 flow [2023-08-29 19:30:11,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 839 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-29 19:30:11,811 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 510 flow [2023-08-29 19:30:11,811 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} [2023-08-29 19:30:11,811 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -27 predicate places. [2023-08-29 19:30:11,812 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 510 flow [2023-08-29 19:30:11,813 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) [2023-08-29 19:30:11,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:11,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:11,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 19:30:11,813 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:11,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:11,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1567339102, now seen corresponding path program 2 times [2023-08-29 19:30:11,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:11,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855219052] [2023-08-29 19:30:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:11,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:12,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:12,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855219052] [2023-08-29 19:30:12,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855219052] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:12,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:12,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:30:12,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555774483] [2023-08-29 19:30:12,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:12,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:30:12,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:30:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:30:14,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-29 19:30:14,337 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) [2023-08-29 19:30:14,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:14,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-29 19:30:14,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:14,952 INFO L130 PetriNetUnfolder]: 1981/3481 cut-off events. [2023-08-29 19:30:14,952 INFO L131 PetriNetUnfolder]: For 1027/1027 co-relation queries the response was YES. [2023-08-29 19:30:14,959 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. [2023-08-29 19:30:14,964 INFO L137 encePairwiseOnDemand]: 741/753 looper letters, 114 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2023-08-29 19:30:14,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 151 transitions, 922 flow [2023-08-29 19:30:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:30:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:30:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2921 transitions. [2023-08-29 19:30:14,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38791500664010625 [2023-08-29 19:30:14,969 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2921 transitions. [2023-08-29 19:30:14,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2921 transitions. [2023-08-29 19:30:14,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:14,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2921 transitions. [2023-08-29 19:30:14,973 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) [2023-08-29 19:30:14,978 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) [2023-08-29 19:30:14,978 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) [2023-08-29 19:30:14,978 INFO L175 Difference]: Start difference. First operand has 112 places, 96 transitions, 510 flow. Second operand 10 states and 2921 transitions. [2023-08-29 19:30:14,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 151 transitions, 922 flow [2023-08-29 19:30:14,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 877 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-29 19:30:14,986 INFO L231 Difference]: Finished difference. Result has 117 places, 99 transitions, 567 flow [2023-08-29 19:30:14,986 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} [2023-08-29 19:30:14,986 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -22 predicate places. [2023-08-29 19:30:14,986 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 99 transitions, 567 flow [2023-08-29 19:30:14,987 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) [2023-08-29 19:30:14,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:14,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:14,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 19:30:14,988 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:14,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1567656232, now seen corresponding path program 3 times [2023-08-29 19:30:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:14,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225014379] [2023-08-29 19:30:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:14,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:16,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:16,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225014379] [2023-08-29 19:30:16,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225014379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:16,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:16,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:30:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053735990] [2023-08-29 19:30:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:16,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:30:16,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:30:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:30:19,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 753 [2023-08-29 19:30:19,265 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) [2023-08-29 19:30:19,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:19,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 753 [2023-08-29 19:30:19,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:20,221 INFO L130 PetriNetUnfolder]: 1968/3458 cut-off events. [2023-08-29 19:30:20,221 INFO L131 PetriNetUnfolder]: For 1250/1250 co-relation queries the response was YES. [2023-08-29 19:30:20,228 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. [2023-08-29 19:30:20,233 INFO L137 encePairwiseOnDemand]: 741/753 looper letters, 115 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2023-08-29 19:30:20,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 155 transitions, 979 flow [2023-08-29 19:30:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:30:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:30:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2926 transitions. [2023-08-29 19:30:20,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38857901726427624 [2023-08-29 19:30:20,237 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2926 transitions. [2023-08-29 19:30:20,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2926 transitions. [2023-08-29 19:30:20,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:20,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2926 transitions. [2023-08-29 19:30:20,240 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) [2023-08-29 19:30:20,245 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) [2023-08-29 19:30:20,246 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) [2023-08-29 19:30:20,246 INFO L175 Difference]: Start difference. First operand has 117 places, 99 transitions, 567 flow. Second operand 10 states and 2926 transitions. [2023-08-29 19:30:20,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 155 transitions, 979 flow [2023-08-29 19:30:20,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 155 transitions, 945 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-29 19:30:20,254 INFO L231 Difference]: Finished difference. Result has 118 places, 97 transitions, 589 flow [2023-08-29 19:30:20,254 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} [2023-08-29 19:30:20,255 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -21 predicate places. [2023-08-29 19:30:20,255 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 97 transitions, 589 flow [2023-08-29 19:30:20,256 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) [2023-08-29 19:30:20,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:20,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:20,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:30:20,256 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:20,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:20,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1027074210, now seen corresponding path program 1 times [2023-08-29 19:30:20,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:20,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463220880] [2023-08-29 19:30:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:20,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:20,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:20,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463220880] [2023-08-29 19:30:20,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463220880] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:20,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:20,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-29 19:30:20,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118278106] [2023-08-29 19:30:20,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:20,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 19:30:20,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 19:30:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-08-29 19:30:22,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-29 19:30:22,136 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) [2023-08-29 19:30:22,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:22,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-29 19:30:22,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:22,691 INFO L130 PetriNetUnfolder]: 2127/3742 cut-off events. [2023-08-29 19:30:22,691 INFO L131 PetriNetUnfolder]: For 1910/1910 co-relation queries the response was YES. [2023-08-29 19:30:22,698 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. [2023-08-29 19:30:22,705 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 106 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2023-08-29 19:30:22,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 134 transitions, 974 flow [2023-08-29 19:30:22,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:30:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:30:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2777 transitions. [2023-08-29 19:30:22,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687915006640106 [2023-08-29 19:30:22,707 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2777 transitions. [2023-08-29 19:30:22,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2777 transitions. [2023-08-29 19:30:22,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:22,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2777 transitions. [2023-08-29 19:30:22,710 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) [2023-08-29 19:30:22,715 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) [2023-08-29 19:30:22,715 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) [2023-08-29 19:30:22,716 INFO L175 Difference]: Start difference. First operand has 118 places, 97 transitions, 589 flow. Second operand 10 states and 2777 transitions. [2023-08-29 19:30:22,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 134 transitions, 974 flow [2023-08-29 19:30:22,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 134 transitions, 900 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 19:30:22,724 INFO L231 Difference]: Finished difference. Result has 121 places, 101 transitions, 622 flow [2023-08-29 19:30:22,725 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} [2023-08-29 19:30:22,725 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -18 predicate places. [2023-08-29 19:30:22,725 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 101 transitions, 622 flow [2023-08-29 19:30:22,726 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) [2023-08-29 19:30:22,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:22,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:22,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 19:30:22,726 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:22,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:22,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1749747090, now seen corresponding path program 1 times [2023-08-29 19:30:22,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:22,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338234323] [2023-08-29 19:30:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:22,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:23,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:23,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338234323] [2023-08-29 19:30:23,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338234323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:23,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:23,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-29 19:30:23,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617446179] [2023-08-29 19:30:23,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:23,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:30:23,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:30:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:30:25,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-29 19:30:25,040 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) [2023-08-29 19:30:25,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:25,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-29 19:30:25,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:25,689 INFO L130 PetriNetUnfolder]: 2114/3712 cut-off events. [2023-08-29 19:30:25,690 INFO L131 PetriNetUnfolder]: For 1632/1632 co-relation queries the response was YES. [2023-08-29 19:30:25,702 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. [2023-08-29 19:30:25,711 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 120 selfloop transitions, 27 changer transitions 0/155 dead transitions. [2023-08-29 19:30:25,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 155 transitions, 1037 flow [2023-08-29 19:30:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:30:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:30:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2525 transitions. [2023-08-29 19:30:25,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725837391176037 [2023-08-29 19:30:25,715 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2525 transitions. [2023-08-29 19:30:25,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2525 transitions. [2023-08-29 19:30:25,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:25,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2525 transitions. [2023-08-29 19:30:25,718 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) [2023-08-29 19:30:25,722 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) [2023-08-29 19:30:25,723 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) [2023-08-29 19:30:25,723 INFO L175 Difference]: Start difference. First operand has 121 places, 101 transitions, 622 flow. Second operand 9 states and 2525 transitions. [2023-08-29 19:30:25,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 155 transitions, 1037 flow [2023-08-29 19:30:25,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1010 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 19:30:25,732 INFO L231 Difference]: Finished difference. Result has 124 places, 101 transitions, 659 flow [2023-08-29 19:30:25,733 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} [2023-08-29 19:30:25,733 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -15 predicate places. [2023-08-29 19:30:25,733 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 101 transitions, 659 flow [2023-08-29 19:30:25,734 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) [2023-08-29 19:30:25,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:25,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:25,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 19:30:25,734 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:25,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2037496838, now seen corresponding path program 2 times [2023-08-29 19:30:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:25,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933541300] [2023-08-29 19:30:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:25,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:26,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:26,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933541300] [2023-08-29 19:30:26,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933541300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:26,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:26,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-29 19:30:26,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522884336] [2023-08-29 19:30:26,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:26,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:30:26,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:26,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:30:26,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:30:27,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-29 19:30:27,995 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) [2023-08-29 19:30:27,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:27,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-29 19:30:27,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:28,588 INFO L130 PetriNetUnfolder]: 2101/3682 cut-off events. [2023-08-29 19:30:28,588 INFO L131 PetriNetUnfolder]: For 2301/2301 co-relation queries the response was YES. [2023-08-29 19:30:28,597 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. [2023-08-29 19:30:28,603 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 117 selfloop transitions, 27 changer transitions 0/152 dead transitions. [2023-08-29 19:30:28,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 152 transitions, 1058 flow [2023-08-29 19:30:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:30:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:30:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2788 transitions. [2023-08-29 19:30:28,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3702523240371846 [2023-08-29 19:30:28,606 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2788 transitions. [2023-08-29 19:30:28,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2788 transitions. [2023-08-29 19:30:28,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:28,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2788 transitions. [2023-08-29 19:30:28,610 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) [2023-08-29 19:30:28,614 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) [2023-08-29 19:30:28,614 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) [2023-08-29 19:30:28,614 INFO L175 Difference]: Start difference. First operand has 124 places, 101 transitions, 659 flow. Second operand 10 states and 2788 transitions. [2023-08-29 19:30:28,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 152 transitions, 1058 flow [2023-08-29 19:30:28,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 152 transitions, 1020 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-29 19:30:28,625 INFO L231 Difference]: Finished difference. Result has 128 places, 101 transitions, 686 flow [2023-08-29 19:30:28,625 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} [2023-08-29 19:30:28,626 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -11 predicate places. [2023-08-29 19:30:28,626 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 101 transitions, 686 flow [2023-08-29 19:30:28,626 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) [2023-08-29 19:30:28,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:28,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:28,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 19:30:28,627 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:28,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 278044459, now seen corresponding path program 1 times [2023-08-29 19:30:28,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:28,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279647425] [2023-08-29 19:30:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:28,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:28,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:28,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279647425] [2023-08-29 19:30:28,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279647425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:28,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:28,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:30:28,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604869861] [2023-08-29 19:30:28,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:28,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:30:28,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:28,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:30:28,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:30:28,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-29 19:30:28,958 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) [2023-08-29 19:30:28,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:28,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-29 19:30:28,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:29,297 INFO L130 PetriNetUnfolder]: 2386/4212 cut-off events. [2023-08-29 19:30:29,298 INFO L131 PetriNetUnfolder]: For 3177/3177 co-relation queries the response was YES. [2023-08-29 19:30:29,308 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. [2023-08-29 19:30:29,315 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 117 selfloop transitions, 3 changer transitions 0/137 dead transitions. [2023-08-29 19:30:29,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 137 transitions, 1014 flow [2023-08-29 19:30:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:30:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:30:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1356 transitions. [2023-08-29 19:30:29,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450199203187251 [2023-08-29 19:30:29,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1356 transitions. [2023-08-29 19:30:29,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1356 transitions. [2023-08-29 19:30:29,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:29,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1356 transitions. [2023-08-29 19:30:29,319 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) [2023-08-29 19:30:29,321 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) [2023-08-29 19:30:29,321 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) [2023-08-29 19:30:29,321 INFO L175 Difference]: Start difference. First operand has 128 places, 101 transitions, 686 flow. Second operand 4 states and 1356 transitions. [2023-08-29 19:30:29,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 137 transitions, 1014 flow [2023-08-29 19:30:29,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 137 transitions, 970 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 19:30:29,332 INFO L231 Difference]: Finished difference. Result has 125 places, 102 transitions, 658 flow [2023-08-29 19:30:29,332 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} [2023-08-29 19:30:29,332 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -14 predicate places. [2023-08-29 19:30:29,333 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 102 transitions, 658 flow [2023-08-29 19:30:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 321.25) internal successors, (1285), 4 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:29,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:29,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:29,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 19:30:29,334 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:29,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1619278936, now seen corresponding path program 1 times [2023-08-29 19:30:29,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:29,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309145822] [2023-08-29 19:30:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:29,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:29,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:29,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309145822] [2023-08-29 19:30:29,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309145822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:29,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:29,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:30:29,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947815580] [2023-08-29 19:30:29,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:29,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:30:29,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:29,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:30:29,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:30:29,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 753 [2023-08-29 19:30:29,381 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) [2023-08-29 19:30:29,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:29,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 753 [2023-08-29 19:30:29,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:29,660 INFO L130 PetriNetUnfolder]: 1607/2932 cut-off events. [2023-08-29 19:30:29,661 INFO L131 PetriNetUnfolder]: For 2377/2377 co-relation queries the response was YES. [2023-08-29 19:30:29,666 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. [2023-08-29 19:30:29,669 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 101 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2023-08-29 19:30:29,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 118 transitions, 920 flow [2023-08-29 19:30:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:30:29,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:30:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1030 transitions. [2023-08-29 19:30:29,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45595396193005755 [2023-08-29 19:30:29,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1030 transitions. [2023-08-29 19:30:29,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1030 transitions. [2023-08-29 19:30:29,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:29,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1030 transitions. [2023-08-29 19:30:29,672 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) [2023-08-29 19:30:29,673 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) [2023-08-29 19:30:29,673 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) [2023-08-29 19:30:29,673 INFO L175 Difference]: Start difference. First operand has 125 places, 102 transitions, 658 flow. Second operand 3 states and 1030 transitions. [2023-08-29 19:30:29,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 118 transitions, 920 flow [2023-08-29 19:30:29,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 118 transitions, 912 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:30:29,681 INFO L231 Difference]: Finished difference. Result has 126 places, 102 transitions, 665 flow [2023-08-29 19:30:29,681 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} [2023-08-29 19:30:29,682 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -13 predicate places. [2023-08-29 19:30:29,682 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 102 transitions, 665 flow [2023-08-29 19:30:29,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:29,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:29,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:29,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 19:30:29,683 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)] === [2023-08-29 19:30:29,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:29,683 INFO L85 PathProgramCache]: Analyzing trace with hash -244183533, now seen corresponding path program 1 times [2023-08-29 19:30:29,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:29,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63060108] [2023-08-29 19:30:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:29,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:30:29,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:29,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63060108] [2023-08-29 19:30:29,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63060108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:29,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:29,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:30:29,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467387028] [2023-08-29 19:30:29,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:29,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:30:29,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:29,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:30:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:30:29,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 753 [2023-08-29 19:30:29,754 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) [2023-08-29 19:30:29,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:29,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 753 [2023-08-29 19:30:29,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:30,254 INFO L130 PetriNetUnfolder]: 2397/4628 cut-off events. [2023-08-29 19:30:30,255 INFO L131 PetriNetUnfolder]: For 3805/3815 co-relation queries the response was YES. [2023-08-29 19:30:30,275 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. [2023-08-29 19:30:30,287 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 145 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2023-08-29 19:30:30,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 163 transitions, 1270 flow [2023-08-29 19:30:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:30:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:30:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-29 19:30:30,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718902169101372 [2023-08-29 19:30:30,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-29 19:30:30,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-29 19:30:30,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:30,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-29 19:30:30,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.3333333333333) internal successors, (1066), 3 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:30,293 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) [2023-08-29 19:30:30,293 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) [2023-08-29 19:30:30,293 INFO L175 Difference]: Start difference. First operand has 126 places, 102 transitions, 665 flow. Second operand 3 states and 1066 transitions. [2023-08-29 19:30:30,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 163 transitions, 1270 flow [2023-08-29 19:30:30,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 163 transitions, 1262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:30:30,305 INFO L231 Difference]: Finished difference. Result has 127 places, 103 transitions, 671 flow [2023-08-29 19:30:30,305 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} [2023-08-29 19:30:30,307 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -12 predicate places. [2023-08-29 19:30:30,307 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 103 transitions, 671 flow [2023-08-29 19:30:30,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:30,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:30,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:30,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 19:30:30,308 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:30,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:30,308 INFO L85 PathProgramCache]: Analyzing trace with hash 695068579, now seen corresponding path program 1 times [2023-08-29 19:30:30,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:30,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217639978] [2023-08-29 19:30:30,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:30,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:30,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217639978] [2023-08-29 19:30:30,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217639978] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:30,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:30,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:30:30,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343390642] [2023-08-29 19:30:30,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:30,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:30:30,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:30:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:30:30,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 753 [2023-08-29 19:30:30,431 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) [2023-08-29 19:30:30,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:30,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 753 [2023-08-29 19:30:30,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:30,831 INFO L130 PetriNetUnfolder]: 1960/3722 cut-off events. [2023-08-29 19:30:30,832 INFO L131 PetriNetUnfolder]: For 3360/3361 co-relation queries the response was YES. [2023-08-29 19:30:30,846 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. [2023-08-29 19:30:30,855 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 95 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2023-08-29 19:30:30,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 116 transitions, 930 flow [2023-08-29 19:30:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:30:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:30:30,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-29 19:30:30,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-29 19:30:30,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-29 19:30:30,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-29 19:30:30,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:30,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-29 19:30:30,859 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) [2023-08-29 19:30:30,860 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) [2023-08-29 19:30:30,860 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) [2023-08-29 19:30:30,861 INFO L175 Difference]: Start difference. First operand has 127 places, 103 transitions, 671 flow. Second operand 3 states and 1021 transitions. [2023-08-29 19:30:30,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 116 transitions, 930 flow [2023-08-29 19:30:30,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 116 transitions, 926 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:30:30,872 INFO L231 Difference]: Finished difference. Result has 128 places, 103 transitions, 683 flow [2023-08-29 19:30:30,872 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} [2023-08-29 19:30:30,873 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -11 predicate places. [2023-08-29 19:30:30,873 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 103 transitions, 683 flow [2023-08-29 19:30:30,873 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) [2023-08-29 19:30:30,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:30,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:30,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-29 19:30:30,874 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:30,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:30,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1473818161, now seen corresponding path program 1 times [2023-08-29 19:30:30,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:30,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103376471] [2023-08-29 19:30:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:30,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:30:30,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103376471] [2023-08-29 19:30:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103376471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:30:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014708374] [2023-08-29 19:30:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:30,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:30:30,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:30:30,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-29 19:30:30,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-29 19:30:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:31,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:30:31,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:30:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:30:31,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:30:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-29 19:30:31,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014708374] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:30:31,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:30:31,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 19:30:31,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137231407] [2023-08-29 19:30:31,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:30:31,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:30:31,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:31,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:30:31,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:30:31,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-29 19:30:31,283 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) [2023-08-29 19:30:31,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:31,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-29 19:30:31,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:32,068 INFO L130 PetriNetUnfolder]: 3027/6171 cut-off events. [2023-08-29 19:30:32,068 INFO L131 PetriNetUnfolder]: For 5511/5530 co-relation queries the response was YES. [2023-08-29 19:30:32,084 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. [2023-08-29 19:30:32,094 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 271 selfloop transitions, 6 changer transitions 0/293 dead transitions. [2023-08-29 19:30:32,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 293 transitions, 2116 flow [2023-08-29 19:30:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:30:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:30:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2149 transitions. [2023-08-29 19:30:32,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756529437804338 [2023-08-29 19:30:32,097 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2149 transitions. [2023-08-29 19:30:32,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2149 transitions. [2023-08-29 19:30:32,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:32,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2149 transitions. [2023-08-29 19:30:32,099 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) [2023-08-29 19:30:32,102 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) [2023-08-29 19:30:32,102 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) [2023-08-29 19:30:32,102 INFO L175 Difference]: Start difference. First operand has 128 places, 103 transitions, 683 flow. Second operand 6 states and 2149 transitions. [2023-08-29 19:30:32,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 293 transitions, 2116 flow [2023-08-29 19:30:32,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 293 transitions, 2093 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:30:32,116 INFO L231 Difference]: Finished difference. Result has 136 places, 106 transitions, 717 flow [2023-08-29 19:30:32,116 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} [2023-08-29 19:30:32,117 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -3 predicate places. [2023-08-29 19:30:32,117 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 106 transitions, 717 flow [2023-08-29 19:30:32,117 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) [2023-08-29 19:30:32,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:32,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:32,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-29 19:30:32,324 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 [2023-08-29 19:30:32,324 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:32,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1498115350, now seen corresponding path program 1 times [2023-08-29 19:30:32,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:32,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539602322] [2023-08-29 19:30:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:32,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:33,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:33,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539602322] [2023-08-29 19:30:33,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539602322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:33,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:33,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:30:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520485307] [2023-08-29 19:30:33,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:33,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:30:33,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:33,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:30:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:30:35,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 753 [2023-08-29 19:30:35,159 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) [2023-08-29 19:30:35,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:35,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 753 [2023-08-29 19:30:35,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:36,183 INFO L130 PetriNetUnfolder]: 3476/6756 cut-off events. [2023-08-29 19:30:36,184 INFO L131 PetriNetUnfolder]: For 11297/11329 co-relation queries the response was YES. [2023-08-29 19:30:36,205 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. [2023-08-29 19:30:36,220 INFO L137 encePairwiseOnDemand]: 735/753 looper letters, 196 selfloop transitions, 42 changer transitions 0/245 dead transitions. [2023-08-29 19:30:36,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 245 transitions, 2033 flow [2023-08-29 19:30:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 19:30:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 19:30:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4597 transitions. [2023-08-29 19:30:36,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815571049136786 [2023-08-29 19:30:36,224 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4597 transitions. [2023-08-29 19:30:36,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4597 transitions. [2023-08-29 19:30:36,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:36,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4597 transitions. [2023-08-29 19:30:36,229 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) [2023-08-29 19:30:36,236 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) [2023-08-29 19:30:36,237 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) [2023-08-29 19:30:36,237 INFO L175 Difference]: Start difference. First operand has 136 places, 106 transitions, 717 flow. Second operand 16 states and 4597 transitions. [2023-08-29 19:30:36,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 245 transitions, 2033 flow [2023-08-29 19:30:36,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 245 transitions, 1920 flow, removed 42 selfloop flow, removed 1 redundant places. [2023-08-29 19:30:36,265 INFO L231 Difference]: Finished difference. Result has 154 places, 119 transitions, 884 flow [2023-08-29 19:30:36,265 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} [2023-08-29 19:30:36,266 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 15 predicate places. [2023-08-29 19:30:36,266 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 119 transitions, 884 flow [2023-08-29 19:30:36,266 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) [2023-08-29 19:30:36,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:36,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:36,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-29 19:30:36,267 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:36,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:36,267 INFO L85 PathProgramCache]: Analyzing trace with hash 682204528, now seen corresponding path program 2 times [2023-08-29 19:30:36,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:36,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932565149] [2023-08-29 19:30:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:36,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:37,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:37,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932565149] [2023-08-29 19:30:37,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932565149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:37,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:37,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:30:37,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738680238] [2023-08-29 19:30:37,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:37,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:30:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:37,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:30:37,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:30:39,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 753 [2023-08-29 19:30:39,077 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) [2023-08-29 19:30:39,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:39,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 753 [2023-08-29 19:30:39,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:40,168 INFO L130 PetriNetUnfolder]: 3403/6717 cut-off events. [2023-08-29 19:30:40,168 INFO L131 PetriNetUnfolder]: For 10166/10182 co-relation queries the response was YES. [2023-08-29 19:30:40,185 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. [2023-08-29 19:30:40,195 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 194 selfloop transitions, 48 changer transitions 0/249 dead transitions. [2023-08-29 19:30:40,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 249 transitions, 2068 flow [2023-08-29 19:30:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 19:30:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 19:30:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4803 transitions. [2023-08-29 19:30:40,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3752050621045231 [2023-08-29 19:30:40,198 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4803 transitions. [2023-08-29 19:30:40,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4803 transitions. [2023-08-29 19:30:40,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:40,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4803 transitions. [2023-08-29 19:30:40,203 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) [2023-08-29 19:30:40,210 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) [2023-08-29 19:30:40,211 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) [2023-08-29 19:30:40,211 INFO L175 Difference]: Start difference. First operand has 154 places, 119 transitions, 884 flow. Second operand 17 states and 4803 transitions. [2023-08-29 19:30:40,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 249 transitions, 2068 flow [2023-08-29 19:30:40,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 249 transitions, 1977 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-29 19:30:40,237 INFO L231 Difference]: Finished difference. Result has 164 places, 125 transitions, 960 flow [2023-08-29 19:30:40,237 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} [2023-08-29 19:30:40,238 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 25 predicate places. [2023-08-29 19:30:40,238 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 125 transitions, 960 flow [2023-08-29 19:30:40,239 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) [2023-08-29 19:30:40,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:40,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:40,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-29 19:30:40,239 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:40,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1905397562, now seen corresponding path program 3 times [2023-08-29 19:30:40,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:40,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417499355] [2023-08-29 19:30:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:40,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:42,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:42,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417499355] [2023-08-29 19:30:42,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417499355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:42,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:42,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:30:42,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692929807] [2023-08-29 19:30:42,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:42,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:30:42,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:42,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:30:42,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:30:45,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 753 [2023-08-29 19:30:45,329 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) [2023-08-29 19:30:45,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:45,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 753 [2023-08-29 19:30:45,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:47,479 INFO L130 PetriNetUnfolder]: 4588/8922 cut-off events. [2023-08-29 19:30:47,479 INFO L131 PetriNetUnfolder]: For 11528/11552 co-relation queries the response was YES. [2023-08-29 19:30:47,510 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. [2023-08-29 19:30:47,526 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 219 selfloop transitions, 41 changer transitions 0/267 dead transitions. [2023-08-29 19:30:47,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 267 transitions, 2158 flow [2023-08-29 19:30:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:30:47,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:30:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3820 transitions. [2023-08-29 19:30:47,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623600834756213 [2023-08-29 19:30:47,530 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3820 transitions. [2023-08-29 19:30:47,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3820 transitions. [2023-08-29 19:30:47,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:47,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3820 transitions. [2023-08-29 19:30:47,537 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) [2023-08-29 19:30:47,543 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) [2023-08-29 19:30:47,544 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) [2023-08-29 19:30:47,544 INFO L175 Difference]: Start difference. First operand has 164 places, 125 transitions, 960 flow. Second operand 14 states and 3820 transitions. [2023-08-29 19:30:47,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 267 transitions, 2158 flow [2023-08-29 19:30:47,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 267 transitions, 2097 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-29 19:30:47,576 INFO L231 Difference]: Finished difference. Result has 171 places, 132 transitions, 1060 flow [2023-08-29 19:30:47,576 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} [2023-08-29 19:30:47,577 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 32 predicate places. [2023-08-29 19:30:47,577 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 132 transitions, 1060 flow [2023-08-29 19:30:47,577 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) [2023-08-29 19:30:47,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:47,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:47,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-29 19:30:47,578 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:47,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:47,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1727020662, now seen corresponding path program 1 times [2023-08-29 19:30:47,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:47,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815228571] [2023-08-29 19:30:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:47,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:48,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:48,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815228571] [2023-08-29 19:30:48,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815228571] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:48,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:48,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:30:48,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863308134] [2023-08-29 19:30:48,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:48,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:30:48,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:48,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:30:48,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:30:51,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 753 [2023-08-29 19:30:51,134 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) [2023-08-29 19:30:51,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:51,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 753 [2023-08-29 19:30:51,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:52,626 INFO L130 PetriNetUnfolder]: 4844/9432 cut-off events. [2023-08-29 19:30:52,626 INFO L131 PetriNetUnfolder]: For 13537/13592 co-relation queries the response was YES. [2023-08-29 19:30:52,663 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. [2023-08-29 19:30:52,681 INFO L137 encePairwiseOnDemand]: 736/753 looper letters, 213 selfloop transitions, 39 changer transitions 0/259 dead transitions. [2023-08-29 19:30:52,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 259 transitions, 2171 flow [2023-08-29 19:30:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:30:52,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:30:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3836 transitions. [2023-08-29 19:30:52,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36387782204515273 [2023-08-29 19:30:52,684 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3836 transitions. [2023-08-29 19:30:52,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3836 transitions. [2023-08-29 19:30:52,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:52,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3836 transitions. [2023-08-29 19:30:52,687 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) [2023-08-29 19:30:52,693 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) [2023-08-29 19:30:52,694 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) [2023-08-29 19:30:52,694 INFO L175 Difference]: Start difference. First operand has 171 places, 132 transitions, 1060 flow. Second operand 14 states and 3836 transitions. [2023-08-29 19:30:52,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 259 transitions, 2171 flow [2023-08-29 19:30:52,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 259 transitions, 2122 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-29 19:30:52,731 INFO L231 Difference]: Finished difference. Result has 179 places, 135 transitions, 1130 flow [2023-08-29 19:30:52,731 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} [2023-08-29 19:30:52,731 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 40 predicate places. [2023-08-29 19:30:52,731 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 135 transitions, 1130 flow [2023-08-29 19:30:52,732 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) [2023-08-29 19:30:52,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:52,732 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] [2023-08-29 19:30:52,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-29 19:30:52,732 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:52,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -485973527, now seen corresponding path program 1 times [2023-08-29 19:30:52,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:52,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3297343] [2023-08-29 19:30:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:52,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:52,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:52,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3297343] [2023-08-29 19:30:52,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3297343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:52,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:52,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:30:52,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764262893] [2023-08-29 19:30:52,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:52,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:30:52,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:30:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:30:52,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 753 [2023-08-29 19:30:53,000 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) [2023-08-29 19:30:53,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:53,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 753 [2023-08-29 19:30:53,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:53,969 INFO L130 PetriNetUnfolder]: 4642/9147 cut-off events. [2023-08-29 19:30:53,969 INFO L131 PetriNetUnfolder]: For 16056/16178 co-relation queries the response was YES. [2023-08-29 19:30:54,003 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. [2023-08-29 19:30:54,020 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 190 selfloop transitions, 3 changer transitions 0/209 dead transitions. [2023-08-29 19:30:54,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 209 transitions, 2092 flow [2023-08-29 19:30:54,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:30:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:30:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1359 transitions. [2023-08-29 19:30:54,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45119521912350596 [2023-08-29 19:30:54,023 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1359 transitions. [2023-08-29 19:30:54,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1359 transitions. [2023-08-29 19:30:54,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:54,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1359 transitions. [2023-08-29 19:30:54,024 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) [2023-08-29 19:30:54,025 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) [2023-08-29 19:30:54,025 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) [2023-08-29 19:30:54,025 INFO L175 Difference]: Start difference. First operand has 179 places, 135 transitions, 1130 flow. Second operand 4 states and 1359 transitions. [2023-08-29 19:30:54,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 209 transitions, 2092 flow [2023-08-29 19:30:54,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 209 transitions, 1962 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-29 19:30:54,065 INFO L231 Difference]: Finished difference. Result has 172 places, 135 transitions, 1061 flow [2023-08-29 19:30:54,065 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} [2023-08-29 19:30:54,065 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 33 predicate places. [2023-08-29 19:30:54,065 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 135 transitions, 1061 flow [2023-08-29 19:30:54,066 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) [2023-08-29 19:30:54,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:54,066 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] [2023-08-29 19:30:54,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-29 19:30:54,066 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:54,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:54,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1794439543, now seen corresponding path program 1 times [2023-08-29 19:30:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:54,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327613301] [2023-08-29 19:30:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:54,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:55,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:55,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327613301] [2023-08-29 19:30:55,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327613301] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:55,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:55,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:30:55,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277675878] [2023-08-29 19:30:55,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:55,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:30:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:55,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:30:55,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:30:56,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 753 [2023-08-29 19:30:56,890 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) [2023-08-29 19:30:56,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:56,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 753 [2023-08-29 19:30:56,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:58,194 INFO L130 PetriNetUnfolder]: 4829/9431 cut-off events. [2023-08-29 19:30:58,194 INFO L131 PetriNetUnfolder]: For 15705/15735 co-relation queries the response was YES. [2023-08-29 19:30:58,342 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. [2023-08-29 19:30:58,359 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 205 selfloop transitions, 50 changer transitions 0/262 dead transitions. [2023-08-29 19:30:58,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 262 transitions, 2346 flow [2023-08-29 19:30:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 19:30:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 19:30:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4529 transitions. [2023-08-29 19:30:58,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37591301460823373 [2023-08-29 19:30:58,362 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4529 transitions. [2023-08-29 19:30:58,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4529 transitions. [2023-08-29 19:30:58,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:58,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4529 transitions. [2023-08-29 19:30:58,366 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) [2023-08-29 19:30:58,370 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) [2023-08-29 19:30:58,370 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) [2023-08-29 19:30:58,370 INFO L175 Difference]: Start difference. First operand has 172 places, 135 transitions, 1061 flow. Second operand 16 states and 4529 transitions. [2023-08-29 19:30:58,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 262 transitions, 2346 flow [2023-08-29 19:30:58,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 262 transitions, 2286 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:30:58,409 INFO L231 Difference]: Finished difference. Result has 186 places, 138 transitions, 1206 flow [2023-08-29 19:30:58,409 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} [2023-08-29 19:30:58,409 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 47 predicate places. [2023-08-29 19:30:58,410 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 138 transitions, 1206 flow [2023-08-29 19:30:58,410 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) [2023-08-29 19:30:58,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:58,410 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] [2023-08-29 19:30:58,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-29 19:30:58,410 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:30:58,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:58,411 INFO L85 PathProgramCache]: Analyzing trace with hash -64428823, now seen corresponding path program 2 times [2023-08-29 19:30:58,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:58,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209542996] [2023-08-29 19:30:58,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:58,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:30:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:30:59,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:30:59,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209542996] [2023-08-29 19:30:59,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209542996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:30:59,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:30:59,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-29 19:30:59,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121324374] [2023-08-29 19:30:59,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:30:59,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-29 19:30:59,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:30:59,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-29 19:30:59,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-29 19:31:02,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 753 [2023-08-29 19:31:02,166 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) [2023-08-29 19:31:02,166 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:02,166 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 753 [2023-08-29 19:31:02,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:03,738 INFO L130 PetriNetUnfolder]: 4209/8268 cut-off events. [2023-08-29 19:31:03,739 INFO L131 PetriNetUnfolder]: For 14627/14658 co-relation queries the response was YES. [2023-08-29 19:31:03,778 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. [2023-08-29 19:31:03,798 INFO L137 encePairwiseOnDemand]: 734/753 looper letters, 210 selfloop transitions, 55 changer transitions 0/272 dead transitions. [2023-08-29 19:31:03,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 272 transitions, 2500 flow [2023-08-29 19:31:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-29 19:31:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-29 19:31:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 4806 transitions. [2023-08-29 19:31:03,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754394187954066 [2023-08-29 19:31:03,803 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 4806 transitions. [2023-08-29 19:31:03,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 4806 transitions. [2023-08-29 19:31:03,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:03,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 4806 transitions. [2023-08-29 19:31:03,808 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) [2023-08-29 19:31:03,814 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) [2023-08-29 19:31:03,815 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) [2023-08-29 19:31:03,815 INFO L175 Difference]: Start difference. First operand has 186 places, 138 transitions, 1206 flow. Second operand 17 states and 4806 transitions. [2023-08-29 19:31:03,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 272 transitions, 2500 flow [2023-08-29 19:31:03,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 272 transitions, 2436 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-29 19:31:03,875 INFO L231 Difference]: Finished difference. Result has 192 places, 137 transitions, 1275 flow [2023-08-29 19:31:03,875 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} [2023-08-29 19:31:03,875 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 53 predicate places. [2023-08-29 19:31:03,875 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 137 transitions, 1275 flow [2023-08-29 19:31:03,876 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) [2023-08-29 19:31:03,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:03,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:31:03,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-29 19:31:03,877 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:03,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:03,877 INFO L85 PathProgramCache]: Analyzing trace with hash 437960755, now seen corresponding path program 1 times [2023-08-29 19:31:03,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:03,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423542554] [2023-08-29 19:31:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:03,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:06,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:06,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423542554] [2023-08-29 19:31:06,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423542554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:06,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:06,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-29 19:31:06,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714986299] [2023-08-29 19:31:06,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:06,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:31:06,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:06,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:31:06,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:31:14,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-29 19:31:14,160 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) [2023-08-29 19:31:14,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:14,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-29 19:31:14,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:16,953 INFO L130 PetriNetUnfolder]: 4561/8948 cut-off events. [2023-08-29 19:31:16,953 INFO L131 PetriNetUnfolder]: For 17670/17698 co-relation queries the response was YES. [2023-08-29 19:31:16,998 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. [2023-08-29 19:31:17,018 INFO L137 encePairwiseOnDemand]: 728/753 looper letters, 229 selfloop transitions, 65 changer transitions 0/301 dead transitions. [2023-08-29 19:31:17,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 301 transitions, 2719 flow [2023-08-29 19:31:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-29 19:31:17,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-29 19:31:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7984 transitions. [2023-08-29 19:31:17,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3534307215582116 [2023-08-29 19:31:17,025 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7984 transitions. [2023-08-29 19:31:17,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7984 transitions. [2023-08-29 19:31:17,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:17,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7984 transitions. [2023-08-29 19:31:17,033 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) [2023-08-29 19:31:17,044 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) [2023-08-29 19:31:17,047 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) [2023-08-29 19:31:17,047 INFO L175 Difference]: Start difference. First operand has 192 places, 137 transitions, 1275 flow. Second operand 30 states and 7984 transitions. [2023-08-29 19:31:17,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 301 transitions, 2719 flow [2023-08-29 19:31:17,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 301 transitions, 2573 flow, removed 1 selfloop flow, removed 14 redundant places. [2023-08-29 19:31:17,230 INFO L231 Difference]: Finished difference. Result has 221 places, 201 transitions, 1857 flow [2023-08-29 19:31:17,230 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} [2023-08-29 19:31:17,230 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 82 predicate places. [2023-08-29 19:31:17,230 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 201 transitions, 1857 flow [2023-08-29 19:31:17,231 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) [2023-08-29 19:31:17,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:17,231 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] [2023-08-29 19:31:17,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-29 19:31:17,232 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:17,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1588328903, now seen corresponding path program 2 times [2023-08-29 19:31:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:17,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790180573] [2023-08-29 19:31:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:19,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:19,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790180573] [2023-08-29 19:31:19,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790180573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:19,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:19,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-29 19:31:19,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177164977] [2023-08-29 19:31:19,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:19,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 19:31:19,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 19:31:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-08-29 19:31:28,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-29 19:31:28,699 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) [2023-08-29 19:31:28,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:28,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-29 19:31:28,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:31,626 INFO L130 PetriNetUnfolder]: 4855/9500 cut-off events. [2023-08-29 19:31:31,626 INFO L131 PetriNetUnfolder]: For 22566/22626 co-relation queries the response was YES. [2023-08-29 19:31:31,686 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. [2023-08-29 19:31:31,708 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 276 selfloop transitions, 64 changer transitions 0/347 dead transitions. [2023-08-29 19:31:31,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 347 transitions, 3384 flow [2023-08-29 19:31:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-29 19:31:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-29 19:31:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7126 transitions. [2023-08-29 19:31:31,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3504992376174315 [2023-08-29 19:31:31,713 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7126 transitions. [2023-08-29 19:31:31,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7126 transitions. [2023-08-29 19:31:31,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:31,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7126 transitions. [2023-08-29 19:31:31,718 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) [2023-08-29 19:31:31,726 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) [2023-08-29 19:31:31,727 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) [2023-08-29 19:31:31,727 INFO L175 Difference]: Start difference. First operand has 221 places, 201 transitions, 1857 flow. Second operand 27 states and 7126 transitions. [2023-08-29 19:31:31,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 347 transitions, 3384 flow [2023-08-29 19:31:31,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 347 transitions, 3350 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-08-29 19:31:31,793 INFO L231 Difference]: Finished difference. Result has 261 places, 248 transitions, 2501 flow [2023-08-29 19:31:31,793 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} [2023-08-29 19:31:31,793 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 122 predicate places. [2023-08-29 19:31:31,793 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 248 transitions, 2501 flow [2023-08-29 19:31:31,794 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) [2023-08-29 19:31:31,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:31,795 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] [2023-08-29 19:31:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-29 19:31:31,795 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:31,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:31,795 INFO L85 PathProgramCache]: Analyzing trace with hash 975787803, now seen corresponding path program 3 times [2023-08-29 19:31:31,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:31,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286881098] [2023-08-29 19:31:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:31,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:34,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:34,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286881098] [2023-08-29 19:31:34,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286881098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:34,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:34,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-08-29 19:31:34,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864264056] [2023-08-29 19:31:34,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:34,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 19:31:34,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:34,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 19:31:34,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-08-29 19:31:42,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 753 [2023-08-29 19:31:42,241 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) [2023-08-29 19:31:42,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:31:42,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 753 [2023-08-29 19:31:42,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:31:45,884 INFO L130 PetriNetUnfolder]: 5128/10105 cut-off events. [2023-08-29 19:31:45,884 INFO L131 PetriNetUnfolder]: For 29297/29387 co-relation queries the response was YES. [2023-08-29 19:31:45,949 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. [2023-08-29 19:31:45,971 INFO L137 encePairwiseOnDemand]: 729/753 looper letters, 322 selfloop transitions, 92 changer transitions 0/421 dead transitions. [2023-08-29 19:31:45,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 421 transitions, 4417 flow [2023-08-29 19:31:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-29 19:31:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-29 19:31:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 8308 transitions. [2023-08-29 19:31:45,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3559096945551129 [2023-08-29 19:31:45,976 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 8308 transitions. [2023-08-29 19:31:45,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 8308 transitions. [2023-08-29 19:31:45,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:31:45,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 8308 transitions. [2023-08-29 19:31:45,984 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) [2023-08-29 19:31:45,996 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) [2023-08-29 19:31:45,998 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) [2023-08-29 19:31:45,998 INFO L175 Difference]: Start difference. First operand has 261 places, 248 transitions, 2501 flow. Second operand 31 states and 8308 transitions. [2023-08-29 19:31:45,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 421 transitions, 4417 flow [2023-08-29 19:31:46,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 421 transitions, 4343 flow, removed 35 selfloop flow, removed 1 redundant places. [2023-08-29 19:31:46,106 INFO L231 Difference]: Finished difference. Result has 301 places, 303 transitions, 3297 flow [2023-08-29 19:31:46,106 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} [2023-08-29 19:31:46,106 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 162 predicate places. [2023-08-29 19:31:46,106 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 303 transitions, 3297 flow [2023-08-29 19:31:46,107 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) [2023-08-29 19:31:46,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:31:46,107 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] [2023-08-29 19:31:46,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-29 19:31:46,107 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:31:46,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:31:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash 948622371, now seen corresponding path program 4 times [2023-08-29 19:31:46,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:31:46,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839845827] [2023-08-29 19:31:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:31:46,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:31:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:31:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:31:55,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:31:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839845827] [2023-08-29 19:31:55,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839845827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:31:55,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:31:55,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-08-29 19:31:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828770557] [2023-08-29 19:31:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:31:55,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 19:31:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:31:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 19:31:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2023-08-29 19:32:56,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-29 19:32:56,716 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) [2023-08-29 19:32:56,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:32:56,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-29 19:32:56,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:24,367 INFO L130 PetriNetUnfolder]: 5388/10605 cut-off events. [2023-08-29 19:33:24,367 INFO L131 PetriNetUnfolder]: For 37799/37929 co-relation queries the response was YES. [2023-08-29 19:33:24,432 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. [2023-08-29 19:33:24,458 INFO L137 encePairwiseOnDemand]: 726/753 looper letters, 372 selfloop transitions, 59 changer transitions 0/438 dead transitions. [2023-08-29 19:33:24,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 438 transitions, 5093 flow [2023-08-29 19:33:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-29 19:33:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-29 19:33:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 7382 transitions. [2023-08-29 19:33:24,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3501233162587744 [2023-08-29 19:33:24,463 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 7382 transitions. [2023-08-29 19:33:24,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 7382 transitions. [2023-08-29 19:33:24,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:24,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 7382 transitions. [2023-08-29 19:33:24,471 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) [2023-08-29 19:33:24,483 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) [2023-08-29 19:33:24,486 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) [2023-08-29 19:33:24,487 INFO L175 Difference]: Start difference. First operand has 301 places, 303 transitions, 3297 flow. Second operand 28 states and 7382 transitions. [2023-08-29 19:33:24,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 438 transitions, 5093 flow [2023-08-29 19:33:24,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 438 transitions, 4851 flow, removed 95 selfloop flow, removed 4 redundant places. [2023-08-29 19:33:24,633 INFO L231 Difference]: Finished difference. Result has 340 places, 353 transitions, 3864 flow [2023-08-29 19:33:24,634 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} [2023-08-29 19:33:24,634 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 201 predicate places. [2023-08-29 19:33:24,634 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 353 transitions, 3864 flow [2023-08-29 19:33:24,635 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) [2023-08-29 19:33:24,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:24,636 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] [2023-08-29 19:33:24,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-29 19:33:24,636 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:33:24,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash -273683617, now seen corresponding path program 5 times [2023-08-29 19:33:24,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:24,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142640279] [2023-08-29 19:33:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:24,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:33:27,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142640279] [2023-08-29 19:33:27,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142640279] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:27,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:27,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-08-29 19:33:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375830697] [2023-08-29 19:33:27,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:27,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 19:33:27,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:27,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 19:33:27,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-29 19:33:53,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-29 19:33:53,306 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) [2023-08-29 19:33:53,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:53,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-29 19:33:53,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:59,273 INFO L130 PetriNetUnfolder]: 5696/11222 cut-off events. [2023-08-29 19:33:59,273 INFO L131 PetriNetUnfolder]: For 46917/47093 co-relation queries the response was YES. [2023-08-29 19:33:59,347 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. [2023-08-29 19:33:59,371 INFO L137 encePairwiseOnDemand]: 728/753 looper letters, 430 selfloop transitions, 92 changer transitions 0/529 dead transitions. [2023-08-29 19:33:59,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 529 transitions, 6202 flow [2023-08-29 19:33:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-29 19:33:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-29 19:33:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7991 transitions. [2023-08-29 19:33:59,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374059318282425 [2023-08-29 19:33:59,377 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7991 transitions. [2023-08-29 19:33:59,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7991 transitions. [2023-08-29 19:33:59,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:59,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7991 transitions. [2023-08-29 19:33:59,384 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) [2023-08-29 19:33:59,392 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) [2023-08-29 19:33:59,394 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) [2023-08-29 19:33:59,394 INFO L175 Difference]: Start difference. First operand has 340 places, 353 transitions, 3864 flow. Second operand 30 states and 7991 transitions. [2023-08-29 19:33:59,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 529 transitions, 6202 flow [2023-08-29 19:33:59,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 529 transitions, 5944 flow, removed 122 selfloop flow, removed 2 redundant places. [2023-08-29 19:33:59,617 INFO L231 Difference]: Finished difference. Result has 379 places, 404 transitions, 4605 flow [2023-08-29 19:33:59,618 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} [2023-08-29 19:33:59,618 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 240 predicate places. [2023-08-29 19:33:59,619 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 404 transitions, 4605 flow [2023-08-29 19:33:59,620 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) [2023-08-29 19:33:59,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:59,620 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] [2023-08-29 19:33:59,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-29 19:33:59,620 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:33:59,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash -804456605, now seen corresponding path program 6 times [2023-08-29 19:33:59,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:59,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701159484] [2023-08-29 19:33:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:59,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:34:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:34:24,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:34:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701159484] [2023-08-29 19:34:24,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701159484] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:34:24,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:34:24,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-08-29 19:34:24,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032114392] [2023-08-29 19:34:24,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:34:24,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-29 19:34:24,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:34:24,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-29 19:34:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2023-08-29 19:35:48,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-29 19:35:48,865 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) [2023-08-29 19:35:48,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:35:48,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-29 19:35:48,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:36:11,469 INFO L130 PetriNetUnfolder]: 6447/12738 cut-off events. [2023-08-29 19:36:11,470 INFO L131 PetriNetUnfolder]: For 65295/65507 co-relation queries the response was YES. [2023-08-29 19:36:11,589 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. [2023-08-29 19:36:11,623 INFO L137 encePairwiseOnDemand]: 725/753 looper letters, 506 selfloop transitions, 127 changer transitions 0/640 dead transitions. [2023-08-29 19:36:11,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 640 transitions, 7884 flow [2023-08-29 19:36:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-29 19:36:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-29 19:36:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 8745 transitions. [2023-08-29 19:36:11,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.351925630810093 [2023-08-29 19:36:11,628 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 8745 transitions. [2023-08-29 19:36:11,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 8745 transitions. [2023-08-29 19:36:11,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:36:11,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 8745 transitions. [2023-08-29 19:36:11,634 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) [2023-08-29 19:36:11,646 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) [2023-08-29 19:36:11,648 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) [2023-08-29 19:36:11,648 INFO L175 Difference]: Start difference. First operand has 379 places, 404 transitions, 4605 flow. Second operand 33 states and 8745 transitions. [2023-08-29 19:36:11,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 640 transitions, 7884 flow [2023-08-29 19:36:11,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 640 transitions, 7496 flow, removed 169 selfloop flow, removed 4 redundant places. [2023-08-29 19:36:11,912 INFO L231 Difference]: Finished difference. Result has 425 places, 468 transitions, 5650 flow [2023-08-29 19:36:11,912 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} [2023-08-29 19:36:11,912 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 286 predicate places. [2023-08-29 19:36:11,912 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 468 transitions, 5650 flow [2023-08-29 19:36:11,913 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) [2023-08-29 19:36:11,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:36:11,914 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] [2023-08-29 19:36:11,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-29 19:36:11,914 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:36:11,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:36:11,914 INFO L85 PathProgramCache]: Analyzing trace with hash -276091999, now seen corresponding path program 7 times [2023-08-29 19:36:11,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:36:11,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801874442] [2023-08-29 19:36:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:36:11,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:36:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:36:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:36:13,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:36:13,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801874442] [2023-08-29 19:36:13,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801874442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:36:13,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:36:13,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-29 19:36:13,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121181310] [2023-08-29 19:36:13,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:36:13,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:36:13,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:36:13,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:36:13,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:36:21,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-29 19:36:21,065 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) [2023-08-29 19:36:21,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:36:21,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-29 19:36:21,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:36:25,896 INFO L130 PetriNetUnfolder]: 6933/13752 cut-off events. [2023-08-29 19:36:25,896 INFO L131 PetriNetUnfolder]: For 103234/103460 co-relation queries the response was YES. [2023-08-29 19:36:26,092 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. [2023-08-29 19:36:26,139 INFO L137 encePairwiseOnDemand]: 728/753 looper letters, 531 selfloop transitions, 137 changer transitions 0/675 dead transitions. [2023-08-29 19:36:26,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 675 transitions, 8944 flow [2023-08-29 19:36:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-29 19:36:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-29 19:36:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8016 transitions. [2023-08-29 19:36:26,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548472775564409 [2023-08-29 19:36:26,144 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8016 transitions. [2023-08-29 19:36:26,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8016 transitions. [2023-08-29 19:36:26,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:36:26,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8016 transitions. [2023-08-29 19:36:26,149 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) [2023-08-29 19:36:26,158 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) [2023-08-29 19:36:26,159 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) [2023-08-29 19:36:26,159 INFO L175 Difference]: Start difference. First operand has 425 places, 468 transitions, 5650 flow. Second operand 30 states and 8016 transitions. [2023-08-29 19:36:26,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 675 transitions, 8944 flow [2023-08-29 19:36:27,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 675 transitions, 8352 flow, removed 256 selfloop flow, removed 6 redundant places. [2023-08-29 19:36:27,343 INFO L231 Difference]: Finished difference. Result has 466 places, 522 transitions, 6570 flow [2023-08-29 19:36:27,344 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} [2023-08-29 19:36:27,345 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 327 predicate places. [2023-08-29 19:36:27,345 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 522 transitions, 6570 flow [2023-08-29 19:36:27,346 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) [2023-08-29 19:36:27,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:36:27,346 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] [2023-08-29 19:36:27,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-29 19:36:27,346 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:36:27,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:36:27,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1241226753, now seen corresponding path program 8 times [2023-08-29 19:36:27,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:36:27,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273665234] [2023-08-29 19:36:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:36:27,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:36:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:36:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:36:29,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:36:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273665234] [2023-08-29 19:36:29,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273665234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:36:29,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:36:29,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-29 19:36:29,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227213061] [2023-08-29 19:36:29,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:36:29,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:36:29,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:36:29,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:36:29,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:36:37,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-29 19:36:37,446 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) [2023-08-29 19:36:37,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:36:37,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-29 19:36:37,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:36:43,773 INFO L130 PetriNetUnfolder]: 7280/14471 cut-off events. [2023-08-29 19:36:43,773 INFO L131 PetriNetUnfolder]: For 165946/166291 co-relation queries the response was YES. [2023-08-29 19:36:43,914 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. [2023-08-29 19:36:43,952 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 502 selfloop transitions, 288 changer transitions 0/797 dead transitions. [2023-08-29 19:36:43,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 797 transitions, 10832 flow [2023-08-29 19:36:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-29 19:36:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-29 19:36:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 9617 transitions. [2023-08-29 19:36:43,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547661207023757 [2023-08-29 19:36:43,957 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 9617 transitions. [2023-08-29 19:36:43,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 9617 transitions. [2023-08-29 19:36:43,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:36:43,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 9617 transitions. [2023-08-29 19:36:43,963 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) [2023-08-29 19:36:44,068 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) [2023-08-29 19:36:44,071 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) [2023-08-29 19:36:44,071 INFO L175 Difference]: Start difference. First operand has 466 places, 522 transitions, 6570 flow. Second operand 36 states and 9617 transitions. [2023-08-29 19:36:44,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 797 transitions, 10832 flow [2023-08-29 19:36:45,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 797 transitions, 10130 flow, removed 300 selfloop flow, removed 6 redundant places. [2023-08-29 19:36:45,248 INFO L231 Difference]: Finished difference. Result has 498 places, 604 transitions, 8245 flow [2023-08-29 19:36:45,248 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} [2023-08-29 19:36:45,249 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 359 predicate places. [2023-08-29 19:36:45,249 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 604 transitions, 8245 flow [2023-08-29 19:36:45,250 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) [2023-08-29 19:36:45,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:36:45,250 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] [2023-08-29 19:36:45,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-29 19:36:45,250 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:36:45,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:36:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash 254862047, now seen corresponding path program 9 times [2023-08-29 19:36:45,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:36:45,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640715583] [2023-08-29 19:36:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:36:45,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:36:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:36:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:36:47,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:36:47,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640715583] [2023-08-29 19:36:47,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640715583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:36:47,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:36:47,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-08-29 19:36:47,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463110834] [2023-08-29 19:36:47,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:36:47,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 19:36:47,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:36:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 19:36:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-08-29 19:36:55,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 753 [2023-08-29 19:36:55,527 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) [2023-08-29 19:36:55,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:36:55,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 753 [2023-08-29 19:36:55,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:37:01,665 INFO L130 PetriNetUnfolder]: 7533/14865 cut-off events. [2023-08-29 19:37:01,666 INFO L131 PetriNetUnfolder]: For 178530/178876 co-relation queries the response was YES. [2023-08-29 19:37:01,811 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. [2023-08-29 19:37:01,862 INFO L137 encePairwiseOnDemand]: 729/753 looper letters, 608 selfloop transitions, 150 changer transitions 0/765 dead transitions. [2023-08-29 19:37:01,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 765 transitions, 11415 flow [2023-08-29 19:37:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-29 19:37:01,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-29 19:37:01,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8046 transitions. [2023-08-29 19:37:01,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3561752988047809 [2023-08-29 19:37:01,867 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8046 transitions. [2023-08-29 19:37:01,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8046 transitions. [2023-08-29 19:37:01,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:37:01,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8046 transitions. [2023-08-29 19:37:01,875 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) [2023-08-29 19:37:01,885 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) [2023-08-29 19:37:01,886 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) [2023-08-29 19:37:01,886 INFO L175 Difference]: Start difference. First operand has 498 places, 604 transitions, 8245 flow. Second operand 30 states and 8046 transitions. [2023-08-29 19:37:01,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 765 transitions, 11415 flow [2023-08-29 19:37:03,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 765 transitions, 10026 flow, removed 525 selfloop flow, removed 13 redundant places. [2023-08-29 19:37:03,529 INFO L231 Difference]: Finished difference. Result has 528 places, 645 transitions, 8412 flow [2023-08-29 19:37:03,530 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} [2023-08-29 19:37:03,530 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 389 predicate places. [2023-08-29 19:37:03,531 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 645 transitions, 8412 flow [2023-08-29 19:37:03,532 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) [2023-08-29 19:37:03,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:37:03,532 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] [2023-08-29 19:37:03,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-29 19:37:03,532 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:37:03,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:37:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash -201092445, now seen corresponding path program 10 times [2023-08-29 19:37:03,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:37:03,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998282160] [2023-08-29 19:37:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:37:03,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:37:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:37:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:37:05,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:37:05,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998282160] [2023-08-29 19:37:05,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998282160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:37:05,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:37:05,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-08-29 19:37:05,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4558270] [2023-08-29 19:37:05,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:37:05,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-29 19:37:05,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:37:05,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-29 19:37:05,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-08-29 19:37:12,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 753 [2023-08-29 19:37:12,611 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) [2023-08-29 19:37:12,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:37:12,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 753 [2023-08-29 19:37:12,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:37:19,808 INFO L130 PetriNetUnfolder]: 8629/17231 cut-off events. [2023-08-29 19:37:19,808 INFO L131 PetriNetUnfolder]: For 137198/137520 co-relation queries the response was YES. [2023-08-29 19:37:19,996 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. [2023-08-29 19:37:20,041 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 652 selfloop transitions, 290 changer transitions 0/949 dead transitions. [2023-08-29 19:37:20,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 949 transitions, 13186 flow [2023-08-29 19:37:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-29 19:37:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-29 19:37:20,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 9942 transitions. [2023-08-29 19:37:20,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.356842898675568 [2023-08-29 19:37:20,046 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 9942 transitions. [2023-08-29 19:37:20,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 9942 transitions. [2023-08-29 19:37:20,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:37:20,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 9942 transitions. [2023-08-29 19:37:20,052 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) [2023-08-29 19:37:20,063 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) [2023-08-29 19:37:20,065 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) [2023-08-29 19:37:20,065 INFO L175 Difference]: Start difference. First operand has 528 places, 645 transitions, 8412 flow. Second operand 37 states and 9942 transitions. [2023-08-29 19:37:20,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 949 transitions, 13186 flow [2023-08-29 19:37:21,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 949 transitions, 12564 flow, removed 260 selfloop flow, removed 6 redundant places. [2023-08-29 19:37:21,485 INFO L231 Difference]: Finished difference. Result has 581 places, 758 transitions, 10687 flow [2023-08-29 19:37:21,485 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} [2023-08-29 19:37:21,486 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 442 predicate places. [2023-08-29 19:37:21,486 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 758 transitions, 10687 flow [2023-08-29 19:37:21,487 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) [2023-08-29 19:37:21,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:37:21,487 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] [2023-08-29 19:37:21,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-29 19:37:21,487 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:37:21,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:37:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash 721594627, now seen corresponding path program 11 times [2023-08-29 19:37:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:37:21,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130112364] [2023-08-29 19:37:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:37:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:37:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:37:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:37:49,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:37:49,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130112364] [2023-08-29 19:37:49,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130112364] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:37:49,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:37:49,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-08-29 19:37:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024452980] [2023-08-29 19:37:49,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:37:49,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-29 19:37:49,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:37:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-29 19:37:49,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-08-29 19:39:48,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 753 [2023-08-29 19:39:48,506 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) [2023-08-29 19:39:48,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:39:48,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 753 [2023-08-29 19:39:48,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:15,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-29 19:40:21,870 INFO L130 PetriNetUnfolder]: 9854/19616 cut-off events. [2023-08-29 19:40:21,871 INFO L131 PetriNetUnfolder]: For 199143/199465 co-relation queries the response was YES. [2023-08-29 19:40:22,140 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. [2023-08-29 19:40:22,198 INFO L137 encePairwiseOnDemand]: 723/753 looper letters, 796 selfloop transitions, 322 changer transitions 0/1124 dead transitions. [2023-08-29 19:40:22,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 1124 transitions, 17668 flow [2023-08-29 19:40:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-29 19:40:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-29 19:40:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 8751 transitions. [2023-08-29 19:40:22,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3418092336536208 [2023-08-29 19:40:22,204 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 8751 transitions. [2023-08-29 19:40:22,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 8751 transitions. [2023-08-29 19:40:22,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:22,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 8751 transitions. [2023-08-29 19:40:22,209 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) [2023-08-29 19:40:22,218 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) [2023-08-29 19:40:22,219 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) [2023-08-29 19:40:22,219 INFO L175 Difference]: Start difference. First operand has 581 places, 758 transitions, 10687 flow. Second operand 34 states and 8751 transitions. [2023-08-29 19:40:22,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 1124 transitions, 17668 flow [2023-08-29 19:40:24,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1124 transitions, 16406 flow, removed 580 selfloop flow, removed 6 redundant places. [2023-08-29 19:40:24,492 INFO L231 Difference]: Finished difference. Result has 628 places, 913 transitions, 13692 flow [2023-08-29 19:40:24,493 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} [2023-08-29 19:40:24,493 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 489 predicate places. [2023-08-29 19:40:24,493 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 913 transitions, 13692 flow [2023-08-29 19:40:24,494 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) [2023-08-29 19:40:24,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:24,494 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] [2023-08-29 19:40:24,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-29 19:40:24,494 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:40:24,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:24,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1331153011, now seen corresponding path program 12 times [2023-08-29 19:40:24,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:40:24,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840439099] [2023-08-29 19:40:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:24,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:40:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:27,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:40:27,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840439099] [2023-08-29 19:40:27,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840439099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:27,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:27,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-08-29 19:40:27,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625316750] [2023-08-29 19:40:27,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:27,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 19:40:27,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:40:27,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 19:40:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2023-08-29 19:40:36,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-29 19:40:36,838 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) [2023-08-29 19:40:36,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:40:36,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-29 19:40:36,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:40:46,766 INFO L130 PetriNetUnfolder]: 10029/19980 cut-off events. [2023-08-29 19:40:46,766 INFO L131 PetriNetUnfolder]: For 241120/241627 co-relation queries the response was YES. [2023-08-29 19:40:47,267 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. [2023-08-29 19:40:47,369 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 654 selfloop transitions, 479 changer transitions 0/1139 dead transitions. [2023-08-29 19:40:47,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 1139 transitions, 18406 flow [2023-08-29 19:40:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-29 19:40:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-29 19:40:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 8535 transitions. [2023-08-29 19:40:47,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3542081673306773 [2023-08-29 19:40:47,379 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 8535 transitions. [2023-08-29 19:40:47,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 8535 transitions. [2023-08-29 19:40:47,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:40:47,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 8535 transitions. [2023-08-29 19:40:47,390 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) [2023-08-29 19:40:47,408 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) [2023-08-29 19:40:47,411 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) [2023-08-29 19:40:47,412 INFO L175 Difference]: Start difference. First operand has 628 places, 913 transitions, 13692 flow. Second operand 32 states and 8535 transitions. [2023-08-29 19:40:47,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 659 places, 1139 transitions, 18406 flow [2023-08-29 19:40:51,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 1139 transitions, 17786 flow, removed 176 selfloop flow, removed 10 redundant places. [2023-08-29 19:40:51,074 INFO L231 Difference]: Finished difference. Result has 661 places, 963 transitions, 15655 flow [2023-08-29 19:40:51,075 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} [2023-08-29 19:40:51,075 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 522 predicate places. [2023-08-29 19:40:51,075 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 963 transitions, 15655 flow [2023-08-29 19:40:51,076 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) [2023-08-29 19:40:51,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:40:51,077 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] [2023-08-29 19:40:51,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-29 19:40:51,077 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:40:51,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:40:51,079 INFO L85 PathProgramCache]: Analyzing trace with hash 32128669, now seen corresponding path program 13 times [2023-08-29 19:40:51,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:40:51,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570210616] [2023-08-29 19:40:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:40:51,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:40:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:40:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:40:54,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:40:54,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570210616] [2023-08-29 19:40:54,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570210616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:40:54,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:40:54,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-29 19:40:54,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990858953] [2023-08-29 19:40:54,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:40:54,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 19:40:54,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:40:54,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 19:40:54,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2023-08-29 19:41:14,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 753 [2023-08-29 19:41:14,662 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) [2023-08-29 19:41:14,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:41:14,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 753 [2023-08-29 19:41:14,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:41:27,117 INFO L130 PetriNetUnfolder]: 10433/20712 cut-off events. [2023-08-29 19:41:27,117 INFO L131 PetriNetUnfolder]: For 308245/308738 co-relation queries the response was YES. [2023-08-29 19:41:27,473 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. [2023-08-29 19:41:27,536 INFO L137 encePairwiseOnDemand]: 726/753 looper letters, 888 selfloop transitions, 297 changer transitions 0/1191 dead transitions. [2023-08-29 19:41:27,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 1191 transitions, 20640 flow [2023-08-29 19:41:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-29 19:41:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-29 19:41:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7939 transitions. [2023-08-29 19:41:27,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35143868968570163 [2023-08-29 19:41:27,540 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7939 transitions. [2023-08-29 19:41:27,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7939 transitions. [2023-08-29 19:41:27,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:41:27,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7939 transitions. [2023-08-29 19:41:27,545 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) [2023-08-29 19:41:27,554 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) [2023-08-29 19:41:27,555 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) [2023-08-29 19:41:27,555 INFO L175 Difference]: Start difference. First operand has 661 places, 963 transitions, 15655 flow. Second operand 30 states and 7939 transitions. [2023-08-29 19:41:27,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 1191 transitions, 20640 flow [2023-08-29 19:41:31,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 1191 transitions, 20020 flow, removed 218 selfloop flow, removed 9 redundant places. [2023-08-29 19:41:31,380 INFO L231 Difference]: Finished difference. Result has 696 places, 1026 transitions, 17438 flow [2023-08-29 19:41:31,381 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} [2023-08-29 19:41:31,381 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 557 predicate places. [2023-08-29 19:41:31,382 INFO L495 AbstractCegarLoop]: Abstraction has has 696 places, 1026 transitions, 17438 flow [2023-08-29 19:41:31,383 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) [2023-08-29 19:41:31,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:41:31,383 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] [2023-08-29 19:41:31,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-29 19:41:31,383 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:41:31,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:41:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash 327272161, now seen corresponding path program 14 times [2023-08-29 19:41:31,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:41:31,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777078947] [2023-08-29 19:41:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:41:31,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:41:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:41:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:41:33,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:41:33,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777078947] [2023-08-29 19:41:33,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777078947] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:41:33,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:41:33,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-08-29 19:41:33,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917526304] [2023-08-29 19:41:33,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:41:33,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-29 19:41:33,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:41:33,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-29 19:41:33,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-08-29 19:41:42,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 753 [2023-08-29 19:41:42,752 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) [2023-08-29 19:41:42,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:41:42,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 753 [2023-08-29 19:41:42,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:41:53,581 INFO L130 PetriNetUnfolder]: 10421/20822 cut-off events. [2023-08-29 19:41:53,581 INFO L131 PetriNetUnfolder]: For 324073/324458 co-relation queries the response was YES. [2023-08-29 19:41:53,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123435 conditions, 20822 events. 10421/20822 cut-off events. For 324073/324458 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 163551 event pairs, 2357 based on Foata normal form. 88/20873 useless extension candidates. Maximal degree in co-relation 123185. Up to 11846 conditions per place. [2023-08-29 19:41:54,030 INFO L137 encePairwiseOnDemand]: 727/753 looper letters, 954 selfloop transitions, 245 changer transitions 0/1206 dead transitions. [2023-08-29 19:41:54,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 1206 transitions, 21771 flow [2023-08-29 19:41:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-29 19:41:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-29 19:41:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 7446 transitions. [2023-08-29 19:41:54,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35315879339783723 [2023-08-29 19:41:54,035 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 7446 transitions. [2023-08-29 19:41:54,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 7446 transitions. [2023-08-29 19:41:54,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:41:54,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 7446 transitions. [2023-08-29 19:41:54,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 265.92857142857144) internal successors, (7446), 28 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:41:54,049 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) [2023-08-29 19:41:54,050 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) [2023-08-29 19:41:54,050 INFO L175 Difference]: Start difference. First operand has 696 places, 1026 transitions, 17438 flow. Second operand 28 states and 7446 transitions. [2023-08-29 19:41:54,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 1206 transitions, 21771 flow [2023-08-29 19:41:58,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 713 places, 1206 transitions, 20696 flow, removed 401 selfloop flow, removed 10 redundant places. [2023-08-29 19:41:58,934 INFO L231 Difference]: Finished difference. Result has 722 places, 1059 transitions, 18067 flow [2023-08-29 19:41:58,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=16494, PETRI_DIFFERENCE_MINUEND_PLACES=686, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18067, PETRI_PLACES=722, PETRI_TRANSITIONS=1059} [2023-08-29 19:41:58,935 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 583 predicate places. [2023-08-29 19:41:58,935 INFO L495 AbstractCegarLoop]: Abstraction has has 722 places, 1059 transitions, 18067 flow [2023-08-29 19:41:58,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-08-29 19:41:58,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:41:58,937 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] [2023-08-29 19:41:58,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-29 19:41:58,937 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:41:58,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:41:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 235823955, now seen corresponding path program 15 times [2023-08-29 19:41:58,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:41:58,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363127011] [2023-08-29 19:41:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:41:58,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:41:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:42:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:42:02,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:42:02,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363127011] [2023-08-29 19:42:02,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363127011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:42:02,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:42:02,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-08-29 19:42:02,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88678704] [2023-08-29 19:42:02,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:42:02,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-29 19:42:02,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:42:02,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-29 19:42:02,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 Killed by 15