./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/queue_longer.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_longer.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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --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 19:29:15,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-29 19:29:15,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-29 19:29:15,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-29 19:29:15,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-29 19:29:15,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-29 19:29:15,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-29 19:29:15,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-29 19:29:15,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-29 19:29:15,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-29 19:29:15,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-29 19:29:15,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-29 19:29:15,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-29 19:29:15,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-29 19:29:15,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-29 19:29:15,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-29 19:29:15,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-29 19:29:15,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-29 19:29:15,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-29 19:29:15,517 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 19:29:15,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-29 19:29:15,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-29 19:29:15,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-29 19:29:15,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-29 19:29:15,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-29 19:29:15,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-29 19:29:15,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-29 19:29:15,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-29 19:29:15,539 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 19:29:15,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-29 19:29:15,546 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-29 19:29:15,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-29 19:29:15,548 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-29 19:29:15,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-29 19:29:15,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-29 19:29:15,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-29 19:29:15,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-29 19:29:15,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-29 19:29:15,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-29 19:29:15,571 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-29 19:29:15,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-29 19:29:15,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-29 19:29:15,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-29 19:29:15,573 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-29 19:29:15,573 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-29 19:29:15,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-29 19:29:15,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-29 19:29:15,574 INFO L138 SettingsManager]: * Use SBE=true [2023-08-29 19:29:15,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-29 19:29:15,574 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-29 19:29:15,575 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-29 19:29:15,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-29 19:29:15,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-29 19:29:15,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-29 19:29:15,575 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-29 19:29:15,575 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-29 19:29:15,576 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-29 19:29:15,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-29 19:29:15,576 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-29 19:29:15,576 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-29 19:29:15,576 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-29 19:29:15,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-29 19:29:15,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-29 19:29:15,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-29 19:29:15,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:29:15,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-29 19:29:15,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-29 19:29:15,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-29 19:29:15,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-29 19:29:15,578 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-29 19:29:15,578 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 19:29:15,579 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-29 19:29:15,579 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-29 19:29:15,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-29 19:29:15,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-29 19:29:15,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-29 19:29:15,881 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-29 19:29:15,882 INFO L275 PluginConnector]: CDTParser initialized [2023-08-29 19:29:15,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_longer.i [2023-08-29 19:29:17,054 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-29 19:29:17,322 INFO L351 CDTParser]: Found 1 translation units. [2023-08-29 19:29:17,323 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i [2023-08-29 19:29:17,344 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f4c52410/7f97195ab1fa47ecb285e96194be81d4/FLAGe316663fc [2023-08-29 19:29:17,360 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f4c52410/7f97195ab1fa47ecb285e96194be81d4 [2023-08-29 19:29:17,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-29 19:29:17,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-29 19:29:17,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-29 19:29:17,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-29 19:29:17,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-29 19:29:17,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:17,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@334fda92 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 19:29:17,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:17,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-29 19:29:17,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-29 19:29:17,805 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_longer.i[43296,43309] [2023-08-29 19:29:17,812 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_longer.i[43503,43516] [2023-08-29 19:29:17,817 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_longer.i[43783,43796] [2023-08-29 19:29:17,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:29:17,835 INFO L203 MainTranslator]: Completed pre-run [2023-08-29 19:29:17,878 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_longer.i[43296,43309] [2023-08-29 19:29:17,879 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_longer.i[43503,43516] [2023-08-29 19:29:17,881 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_longer.i[43783,43796] [2023-08-29 19:29:17,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-29 19:29:17,933 INFO L208 MainTranslator]: Completed translation [2023-08-29 19:29:17,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17 WrapperNode [2023-08-29 19:29:17,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-29 19:29:17,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-29 19:29:17,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-29 19:29:17,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-29 19:29:17,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:17,962 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:17,991 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 243 [2023-08-29 19:29:17,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-29 19:29:17,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-29 19:29:17,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-29 19:29:17,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-29 19:29:18,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:18,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:18,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:18,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:18,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:18,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:18,057 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:18,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:18,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-29 19:29:18,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-29 19:29:18,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-29 19:29:18,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-29 19:29:18,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (1/1) ... [2023-08-29 19:29:18,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-29 19:29:18,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:29:18,102 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 19:29:18,108 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 19:29:18,138 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-29 19:29:18,138 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-29 19:29:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-29 19:29:18,139 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-29 19:29:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-29 19:29:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-29 19:29:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-29 19:29:18,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-29 19:29:18,140 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-29 19:29:18,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-29 19:29:18,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-29 19:29:18,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-29 19:29:18,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-29 19:29:18,141 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 19:29:18,272 INFO L236 CfgBuilder]: Building ICFG [2023-08-29 19:29:18,274 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-29 19:29:18,759 INFO L277 CfgBuilder]: Performing block encoding [2023-08-29 19:29:18,769 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-29 19:29:18,769 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-29 19:29:18,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:29:18 BoogieIcfgContainer [2023-08-29 19:29:18,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-29 19:29:18,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-29 19:29:18,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-29 19:29:18,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-29 19:29:18,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 07:29:17" (1/3) ... [2023-08-29 19:29:18,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411cc811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:29:18, skipping insertion in model container [2023-08-29 19:29:18,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 07:29:17" (2/3) ... [2023-08-29 19:29:18,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411cc811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 07:29:18, skipping insertion in model container [2023-08-29 19:29:18,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 07:29:18" (3/3) ... [2023-08-29 19:29:18,778 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2023-08-29 19:29:18,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-29 19:29:18,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-08-29 19:29:18,794 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-29 19:29:18,941 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-29 19:29:18,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 338 transitions, 692 flow [2023-08-29 19:29:19,091 INFO L130 PetriNetUnfolder]: 15/336 cut-off events. [2023-08-29 19:29:19,092 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:29:19,102 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 19:29:19,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 338 transitions, 692 flow [2023-08-29 19:29:19,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 332 transitions, 676 flow [2023-08-29 19:29:19,116 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-29 19:29:19,124 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-29 19:29:19,126 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 324 places, 332 transitions, 676 flow [2023-08-29 19:29:19,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 324 places, 332 transitions, 676 flow [2023-08-29 19:29:19,226 INFO L130 PetriNetUnfolder]: 15/332 cut-off events. [2023-08-29 19:29:19,227 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-29 19:29:19,231 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 19:29:19,243 INFO L119 LiptonReduction]: Number of co-enabled transitions 28780 [2023-08-29 19:29:31,855 INFO L134 LiptonReduction]: Checked pairs total: 105796 [2023-08-29 19:29:31,855 INFO L136 LiptonReduction]: Total number of compositions: 415 [2023-08-29 19:29:31,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-29 19:29:31,870 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;@4018046c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-29 19:29:31,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-08-29 19:29:31,872 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-29 19:29:31,872 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-29 19:29:31,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:31,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-29 19:29:31,873 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 19:29:31,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:31,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1407, now seen corresponding path program 1 times [2023-08-29 19:29:31,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:31,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941006127] [2023-08-29 19:29:31,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:31,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:32,034 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 19:29:32,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:32,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941006127] [2023-08-29 19:29:32,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941006127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:32,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:32,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-29 19:29:32,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300825465] [2023-08-29 19:29:32,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:32,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-29 19:29:32,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-29 19:29:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-29 19:29:32,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 753 [2023-08-29 19:29:32,070 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 19:29:32,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:32,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 753 [2023-08-29 19:29:32,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:33,238 INFO L130 PetriNetUnfolder]: 7123/11650 cut-off events. [2023-08-29 19:29:33,238 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-08-29 19:29:33,247 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 19:29:33,307 INFO L137 encePairwiseOnDemand]: 704/753 looper letters, 82 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2023-08-29 19:29:33,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 362 flow [2023-08-29 19:29:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-29 19:29:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-29 19:29:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 781 transitions. [2023-08-29 19:29:33,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185922974767596 [2023-08-29 19:29:33,325 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 781 transitions. [2023-08-29 19:29:33,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 781 transitions. [2023-08-29 19:29:33,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:33,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 781 transitions. [2023-08-29 19:29:33,335 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 19:29:33,346 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 19:29:33,347 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 19:29:33,349 INFO L175 Difference]: Start difference. First operand has 139 places, 142 transitions, 296 flow. Second operand 2 states and 781 transitions. [2023-08-29 19:29:33,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 362 flow [2023-08-29 19:29:33,357 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 19:29:33,360 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 190 flow [2023-08-29 19:29:33,362 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 19:29:33,365 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -50 predicate places. [2023-08-29 19:29:33,367 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 190 flow [2023-08-29 19:29:33,367 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 19:29:33,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:33,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:33,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-29 19:29:33,369 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 19:29:33,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1397048, now seen corresponding path program 1 times [2023-08-29 19:29:33,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:33,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247877441] [2023-08-29 19:29:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:33,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:33,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247877441] [2023-08-29 19:29:33,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247877441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:33,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:33,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:33,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992589479] [2023-08-29 19:29:33,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:33,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:33,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:33,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:33,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:33,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 753 [2023-08-29 19:29:33,923 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 19:29:33,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:33,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 753 [2023-08-29 19:29:33,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:34,833 INFO L130 PetriNetUnfolder]: 6353/10400 cut-off events. [2023-08-29 19:29:34,834 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 19:29:34,843 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 19:29:34,888 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 76 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-29 19:29:34,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 89 transitions, 338 flow [2023-08-29 19:29:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-29 19:29:34,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639220894200974 [2023-08-29 19:29:34,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-29 19:29:34,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-29 19:29:34,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:34,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-29 19:29:34,897 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 19:29:34,901 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 19:29:34,903 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 19:29:34,903 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 190 flow. Second operand 3 states and 1048 transitions. [2023-08-29 19:29:34,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 89 transitions, 338 flow [2023-08-29 19:29:34,905 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 19:29:34,906 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 186 flow [2023-08-29 19:29:34,907 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 19:29:34,908 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -52 predicate places. [2023-08-29 19:29:34,908 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 186 flow [2023-08-29 19:29:34,909 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 19:29:34,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:34,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:34,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-29 19:29:34,909 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 19:29:34,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1397046, now seen corresponding path program 1 times [2023-08-29 19:29:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:34,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342450606] [2023-08-29 19:29:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:35,152 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 19:29:35,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:35,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342450606] [2023-08-29 19:29:35,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342450606] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:35,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:35,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:35,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818871076] [2023-08-29 19:29:35,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:35,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:35,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:35,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:35,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:35,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 753 [2023-08-29 19:29:35,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:35,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:35,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 753 [2023-08-29 19:29:35,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:36,008 INFO L130 PetriNetUnfolder]: 5480/8975 cut-off events. [2023-08-29 19:29:36,009 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 19:29:36,016 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 19:29:36,052 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 72 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-29 19:29:36,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 322 flow [2023-08-29 19:29:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1047 transitions. [2023-08-29 19:29:36,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634794156706507 [2023-08-29 19:29:36,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1047 transitions. [2023-08-29 19:29:36,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1047 transitions. [2023-08-29 19:29:36,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:36,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1047 transitions. [2023-08-29 19:29:36,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:36,064 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 19:29:36,065 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 19:29:36,066 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 186 flow. Second operand 3 states and 1047 transitions. [2023-08-29 19:29:36,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 322 flow [2023-08-29 19:29:36,068 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 19:29:36,070 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 174 flow [2023-08-29 19:29:36,070 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 19:29:36,071 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-29 19:29:36,071 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 174 flow [2023-08-29 19:29:36,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.0) internal successors, (972), 3 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:36,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:36,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:36,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-29 19:29:36,073 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 19:29:36,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:36,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1396972, now seen corresponding path program 1 times [2023-08-29 19:29:36,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:36,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648173483] [2023-08-29 19:29:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:36,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:36,131 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 19:29:36,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:36,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648173483] [2023-08-29 19:29:36,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648173483] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:36,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:36,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:36,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746016314] [2023-08-29 19:29:36,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:36,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:36,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:36,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:36,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:36,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-29 19:29:36,262 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 19:29:36,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:36,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-29 19:29:36,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:36,994 INFO L130 PetriNetUnfolder]: 5420/8856 cut-off events. [2023-08-29 19:29:36,995 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 19:29:37,010 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 19:29:37,050 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 69 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-29 19:29:37,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 312 flow [2023-08-29 19:29:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-29 19:29:37,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-29 19:29:37,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-29 19:29:37,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-29 19:29:37,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:37,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-29 19:29:37,059 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 19:29:37,063 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 19:29:37,065 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 19:29:37,065 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 174 flow. Second operand 3 states and 1021 transitions. [2023-08-29 19:29:37,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 312 flow [2023-08-29 19:29:37,066 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 19:29:37,067 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2023-08-29 19:29:37,068 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 19:29:37,068 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -58 predicate places. [2023-08-29 19:29:37,069 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2023-08-29 19:29:37,069 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 19:29:37,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:37,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-29 19:29:37,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-29 19:29:37,070 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 19:29:37,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:37,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1396973, now seen corresponding path program 1 times [2023-08-29 19:29:37,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:37,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131754493] [2023-08-29 19:29:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:37,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:37,122 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 19:29:37,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:37,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131754493] [2023-08-29 19:29:37,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131754493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:37,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:37,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:37,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908909151] [2023-08-29 19:29:37,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:37,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:37,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:37,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:37,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-29 19:29:37,267 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 19:29:37,267 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:37,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-29 19:29:37,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:37,944 INFO L130 PetriNetUnfolder]: 5360/8737 cut-off events. [2023-08-29 19:29:37,945 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 19:29:37,955 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 19:29:37,988 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 67 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-29 19:29:37,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 307 flow [2023-08-29 19:29:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1031 transitions. [2023-08-29 19:29:37,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563966356795042 [2023-08-29 19:29:37,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1031 transitions. [2023-08-29 19:29:37,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1031 transitions. [2023-08-29 19:29:37,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:37,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1031 transitions. [2023-08-29 19:29:37,995 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 19:29:37,999 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 19:29:38,001 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 19:29:38,001 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 3 states and 1031 transitions. [2023-08-29 19:29:38,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 307 flow [2023-08-29 19:29:38,002 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 19:29:38,003 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 169 flow [2023-08-29 19:29:38,003 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 19:29:38,004 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2023-08-29 19:29:38,004 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 169 flow [2023-08-29 19:29:38,005 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 19:29:38,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:38,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-29 19:29:38,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-29 19:29:38,006 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 19:29:38,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash 43308809, now seen corresponding path program 1 times [2023-08-29 19:29:38,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:38,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47384375] [2023-08-29 19:29:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:38,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:38,337 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 19:29:38,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:38,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47384375] [2023-08-29 19:29:38,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47384375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:38,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:38,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:38,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381975276] [2023-08-29 19:29:38,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:38,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:38,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:38,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:38,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:38,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 753 [2023-08-29 19:29:38,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:38,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:38,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 753 [2023-08-29 19:29:38,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:39,091 INFO L130 PetriNetUnfolder]: 5645/9113 cut-off events. [2023-08-29 19:29:39,092 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-29 19:29:39,101 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 19:29:39,135 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 71 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-08-29 19:29:39,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 335 flow [2023-08-29 19:29:39,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:29:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:29:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1306 transitions. [2023-08-29 19:29:39,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43359893758300133 [2023-08-29 19:29:39,139 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1306 transitions. [2023-08-29 19:29:39,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1306 transitions. [2023-08-29 19:29:39,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:39,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1306 transitions. [2023-08-29 19:29:39,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 326.5) internal successors, (1306), 4 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:39,148 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 19:29:39,150 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 19:29:39,150 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 169 flow. Second operand 4 states and 1306 transitions. [2023-08-29 19:29:39,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 335 flow [2023-08-29 19:29:39,151 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 19:29:39,152 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 204 flow [2023-08-29 19:29:39,152 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 19:29:39,153 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-29 19:29:39,153 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 204 flow [2023-08-29 19:29:39,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:39,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:39,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:39,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-29 19:29:39,155 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 19:29:39,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1342574226, now seen corresponding path program 1 times [2023-08-29 19:29:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:39,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421768478] [2023-08-29 19:29:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:39,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:39,342 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 19:29:39,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:39,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421768478] [2023-08-29 19:29:39,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421768478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:39,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:39,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:29:39,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897823932] [2023-08-29 19:29:39,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:39,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:29:39,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:29:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:29:39,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 753 [2023-08-29 19:29:39,748 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 19:29:39,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:39,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 753 [2023-08-29 19:29:39,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:40,416 INFO L130 PetriNetUnfolder]: 4666/7530 cut-off events. [2023-08-29 19:29:40,417 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-08-29 19:29:40,425 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 19:29:40,449 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 112 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2023-08-29 19:29:40,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 526 flow [2023-08-29 19:29:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-29 19:29:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-29 19:29:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1629 transitions. [2023-08-29 19:29:40,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43266932270916336 [2023-08-29 19:29:40,454 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1629 transitions. [2023-08-29 19:29:40,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1629 transitions. [2023-08-29 19:29:40,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:40,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1629 transitions. [2023-08-29 19:29:40,459 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 19:29:40,464 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 19:29:40,466 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 19:29:40,466 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 204 flow. Second operand 5 states and 1629 transitions. [2023-08-29 19:29:40,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 526 flow [2023-08-29 19:29:40,470 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 19:29:40,471 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 199 flow [2023-08-29 19:29:40,471 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 19:29:40,473 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -57 predicate places. [2023-08-29 19:29:40,473 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 199 flow [2023-08-29 19:29:40,474 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 19:29:40,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:40,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:40,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-29 19:29:40,475 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 19:29:40,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:40,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1342534681, now seen corresponding path program 1 times [2023-08-29 19:29:40,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:40,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888114676] [2023-08-29 19:29:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:40,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888114676] [2023-08-29 19:29:40,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888114676] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:40,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:40,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:29:40,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053927925] [2023-08-29 19:29:40,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:40,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-29 19:29:40,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:40,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-29 19:29:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-29 19:29:41,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 303 out of 753 [2023-08-29 19:29:41,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:41,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:41,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 303 of 753 [2023-08-29 19:29:41,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:42,109 INFO L130 PetriNetUnfolder]: 5287/8530 cut-off events. [2023-08-29 19:29:42,109 INFO L131 PetriNetUnfolder]: For 742/742 co-relation queries the response was YES. [2023-08-29 19:29:42,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17148 conditions, 8530 events. 5287/8530 cut-off events. For 742/742 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 48081 event pairs, 1010 based on Foata normal form. 45/5468 useless extension candidates. Maximal degree in co-relation 17141. Up to 7592 conditions per place. [2023-08-29 19:29:42,152 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 99 selfloop transitions, 7 changer transitions 0/115 dead transitions. [2023-08-29 19:29:42,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 115 transitions, 491 flow [2023-08-29 19:29:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:29:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:29:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1317 transitions. [2023-08-29 19:29:42,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43725099601593626 [2023-08-29 19:29:42,157 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1317 transitions. [2023-08-29 19:29:42,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1317 transitions. [2023-08-29 19:29:42,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:42,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1317 transitions. [2023-08-29 19:29:42,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 329.25) internal successors, (1317), 4 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:42,165 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 19:29:42,166 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 19:29:42,166 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 199 flow. Second operand 4 states and 1317 transitions. [2023-08-29 19:29:42,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 115 transitions, 491 flow [2023-08-29 19:29:42,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 480 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:29:42,171 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 234 flow [2023-08-29 19:29:42,171 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-08-29 19:29:42,173 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-29 19:29:42,174 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 234 flow [2023-08-29 19:29:42,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 304.0) internal successors, (1520), 5 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:42,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:42,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:42,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-29 19:29:42,175 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 19:29:42,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:42,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523318, now seen corresponding path program 1 times [2023-08-29 19:29:42,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:42,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384947285] [2023-08-29 19:29:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:42,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:42,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384947285] [2023-08-29 19:29:42,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384947285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:42,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:42,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:42,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841977736] [2023-08-29 19:29:42,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:42,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:42,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:42,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:42,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 753 [2023-08-29 19:29:42,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 234 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 19:29:42,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:42,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 753 [2023-08-29 19:29:42,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:42,922 INFO L130 PetriNetUnfolder]: 3673/6134 cut-off events. [2023-08-29 19:29:42,923 INFO L131 PetriNetUnfolder]: For 620/620 co-relation queries the response was YES. [2023-08-29 19:29:42,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12413 conditions, 6134 events. 3673/6134 cut-off events. For 620/620 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 33875 event pairs, 2958 based on Foata normal form. 0/4268 useless extension candidates. Maximal degree in co-relation 12404. Up to 5601 conditions per place. [2023-08-29 19:29:42,953 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 68 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-29 19:29:42,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 372 flow [2023-08-29 19:29:42,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:42,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-29 19:29:42,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45108455068614434 [2023-08-29 19:29:42,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-29 19:29:42,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-29 19:29:42,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:42,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-29 19:29:42,960 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 19:29:42,963 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 19:29:42,963 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 19:29:42,964 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 234 flow. Second operand 3 states and 1019 transitions. [2023-08-29 19:29:42,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 372 flow [2023-08-29 19:29:42,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 366 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-29 19:29:42,967 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 230 flow [2023-08-29 19:29:42,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2023-08-29 19:29:42,968 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -54 predicate places. [2023-08-29 19:29:42,968 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 230 flow [2023-08-29 19:29:42,968 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 19:29:42,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:42,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-29 19:29:42,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-29 19:29:42,969 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 19:29:42,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1342523317, now seen corresponding path program 1 times [2023-08-29 19:29:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:42,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953150764] [2023-08-29 19:29:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:42,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:43,015 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 19:29:43,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:43,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953150764] [2023-08-29 19:29:43,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953150764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:43,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:43,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:43,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678127016] [2023-08-29 19:29:43,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:43,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:43,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:43,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:43,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:43,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 753 [2023-08-29 19:29:43,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 230 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 19:29:43,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:43,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 753 [2023-08-29 19:29:43,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:43,481 INFO L130 PetriNetUnfolder]: 2274/3952 cut-off events. [2023-08-29 19:29:43,482 INFO L131 PetriNetUnfolder]: For 286/286 co-relation queries the response was YES. [2023-08-29 19:29:43,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7958 conditions, 3952 events. 2274/3952 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 21066 event pairs, 1782 based on Foata normal form. 0/3121 useless extension candidates. Maximal degree in co-relation 7948. Up to 3592 conditions per place. [2023-08-29 19:29:43,500 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 67 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-29 19:29:43,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 366 flow [2023-08-29 19:29:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1000 transitions. [2023-08-29 19:29:43,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426737494466578 [2023-08-29 19:29:43,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1000 transitions. [2023-08-29 19:29:43,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1000 transitions. [2023-08-29 19:29:43,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:43,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1000 transitions. [2023-08-29 19:29:43,507 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 19:29:43,510 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 19:29:43,511 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 19:29:43,511 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 230 flow. Second operand 3 states and 1000 transitions. [2023-08-29 19:29:43,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 366 flow [2023-08-29 19:29:43,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:43,513 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 228 flow [2023-08-29 19:29:43,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=82, 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=228, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2023-08-29 19:29:43,514 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-29 19:29:43,514 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 228 flow [2023-08-29 19:29:43,514 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 19:29:43,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:43,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:43,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-29 19:29:43,515 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:43,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:43,515 INFO L85 PathProgramCache]: Analyzing trace with hash 379604633, now seen corresponding path program 1 times [2023-08-29 19:29:43,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:43,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44835594] [2023-08-29 19:29:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:43,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:43,557 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 19:29:43,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:43,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44835594] [2023-08-29 19:29:43,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44835594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:43,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:43,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:43,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537762684] [2023-08-29 19:29:43,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:43,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:43,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:43,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:43,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-29 19:29:43,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 228 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 19:29:43,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:43,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-29 19:29:43,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:43,797 INFO L130 PetriNetUnfolder]: 1588/2752 cut-off events. [2023-08-29 19:29:43,797 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-08-29 19:29:43,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5517 conditions, 2752 events. 1588/2752 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11918 event pairs, 763 based on Foata normal form. 62/2200 useless extension candidates. Maximal degree in co-relation 5507. Up to 1688 conditions per place. [2023-08-29 19:29:43,807 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 91 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2023-08-29 19:29:43,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 456 flow [2023-08-29 19:29:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-08-29 19:29:43,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46569278441788403 [2023-08-29 19:29:43,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-08-29 19:29:43,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-08-29 19:29:43,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:43,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-08-29 19:29:43,819 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 19:29:43,822 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 19:29:43,822 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 19:29:43,823 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 228 flow. Second operand 3 states and 1052 transitions. [2023-08-29 19:29:43,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 456 flow [2023-08-29 19:29:43,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 431 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-29 19:29:43,826 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 197 flow [2023-08-29 19:29:43,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2023-08-29 19:29:43,827 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -60 predicate places. [2023-08-29 19:29:43,827 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 197 flow [2023-08-29 19:29:43,827 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 19:29:43,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:43,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:43,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-29 19:29:43,828 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:43,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash 236453580, now seen corresponding path program 1 times [2023-08-29 19:29:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:43,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170003205] [2023-08-29 19:29:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:43,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:43,951 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 19:29:43,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:43,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170003205] [2023-08-29 19:29:43,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170003205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:43,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:43,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-29 19:29:43,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285535784] [2023-08-29 19:29:43,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:43,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:43,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:43,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:44,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-29 19:29:44,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:44,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:44,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-29 19:29:44,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:44,286 INFO L130 PetriNetUnfolder]: 1451/2557 cut-off events. [2023-08-29 19:29:44,286 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-08-29 19:29:44,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5124 conditions, 2557 events. 1451/2557 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11033 event pairs, 1098 based on Foata normal form. 0/2017 useless extension candidates. Maximal degree in co-relation 5116. Up to 2344 conditions per place. [2023-08-29 19:29:44,297 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 61 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-29 19:29:44,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 317 flow [2023-08-29 19:29:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1011 transitions. [2023-08-29 19:29:44,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44754316069057104 [2023-08-29 19:29:44,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1011 transitions. [2023-08-29 19:29:44,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1011 transitions. [2023-08-29 19:29:44,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:44,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1011 transitions. [2023-08-29 19:29:44,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:44,306 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 19:29:44,306 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 19:29:44,306 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 197 flow. Second operand 3 states and 1011 transitions. [2023-08-29 19:29:44,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 317 flow [2023-08-29 19:29:44,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 75 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:29:44,309 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 192 flow [2023-08-29 19:29:44,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2023-08-29 19:29:44,310 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -62 predicate places. [2023-08-29 19:29:44,310 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 192 flow [2023-08-29 19:29:44,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:44,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:44,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:44,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-29 19:29:44,311 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 19:29:44,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:44,311 INFO L85 PathProgramCache]: Analyzing trace with hash 236453581, now seen corresponding path program 1 times [2023-08-29 19:29:44,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:44,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961218543] [2023-08-29 19:29:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:44,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:44,842 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 19:29:44,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:44,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961218543] [2023-08-29 19:29:44,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961218543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:44,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:44,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-29 19:29:44,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403131959] [2023-08-29 19:29:44,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:44,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-29 19:29:44,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:44,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-29 19:29:44,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-29 19:29:46,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 753 [2023-08-29 19:29:46,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 192 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 19:29:46,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:46,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 753 [2023-08-29 19:29:46,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:47,227 INFO L130 PetriNetUnfolder]: 1542/2690 cut-off events. [2023-08-29 19:29:47,228 INFO L131 PetriNetUnfolder]: For 103/103 co-relation queries the response was YES. [2023-08-29 19:29:47,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5415 conditions, 2690 events. 1542/2690 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11473 event pairs, 1177 based on Foata normal form. 0/2135 useless extension candidates. Maximal degree in co-relation 5407. Up to 2490 conditions per place. [2023-08-29 19:29:47,237 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 64 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2023-08-29 19:29:47,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 368 flow [2023-08-29 19:29:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:29:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:29:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2169 transitions. [2023-08-29 19:29:47,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41149686966420035 [2023-08-29 19:29:47,243 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2169 transitions. [2023-08-29 19:29:47,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2169 transitions. [2023-08-29 19:29:47,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:47,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2169 transitions. [2023-08-29 19:29:47,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 309.85714285714283) internal successors, (2169), 7 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:47,254 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 19:29:47,255 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 19:29:47,255 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 192 flow. Second operand 7 states and 2169 transitions. [2023-08-29 19:29:47,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 368 flow [2023-08-29 19:29:47,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:47,257 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 249 flow [2023-08-29 19:29:47,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2023-08-29 19:29:47,258 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -55 predicate places. [2023-08-29 19:29:47,258 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 249 flow [2023-08-29 19:29:47,259 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 19:29:47,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:47,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:47,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-29 19:29:47,259 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 19:29:47,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:47,260 INFO L85 PathProgramCache]: Analyzing trace with hash 138579933, now seen corresponding path program 1 times [2023-08-29 19:29:47,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:47,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174746926] [2023-08-29 19:29:47,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:47,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:47,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:47,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174746926] [2023-08-29 19:29:47,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174746926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:47,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:47,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:29:47,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764454348] [2023-08-29 19:29:47,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:47,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:29:47,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:47,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:29:47,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:29:47,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-29 19:29:47,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 249 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 19:29:47,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:47,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-29 19:29:47,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:47,841 INFO L130 PetriNetUnfolder]: 1435/2530 cut-off events. [2023-08-29 19:29:47,841 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2023-08-29 19:29:47,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5149 conditions, 2530 events. 1435/2530 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 10883 event pairs, 1087 based on Foata normal form. 0/2012 useless extension candidates. Maximal degree in co-relation 5138. Up to 2317 conditions per place. [2023-08-29 19:29:47,852 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 66 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-29 19:29:47,852 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 383 flow [2023-08-29 19:29:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:29:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:29:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1340 transitions. [2023-08-29 19:29:47,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448871181938911 [2023-08-29 19:29:47,856 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1340 transitions. [2023-08-29 19:29:47,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1340 transitions. [2023-08-29 19:29:47,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:47,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1340 transitions. [2023-08-29 19:29:47,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 335.0) internal successors, (1340), 4 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:47,863 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 19:29:47,863 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 19:29:47,863 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 249 flow. Second operand 4 states and 1340 transitions. [2023-08-29 19:29:47,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 383 flow [2023-08-29 19:29:47,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 80 transitions, 365 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-29 19:29:47,867 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 233 flow [2023-08-29 19:29:47,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2023-08-29 19:29:47,867 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -56 predicate places. [2023-08-29 19:29:47,867 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 233 flow [2023-08-29 19:29:47,868 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 19:29:47,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:47,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:47,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-29 19:29:47,868 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:29:47,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:47,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1009501, now seen corresponding path program 1 times [2023-08-29 19:29:47,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:47,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194759689] [2023-08-29 19:29:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:47,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:47,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:47,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194759689] [2023-08-29 19:29:47,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194759689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:47,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:47,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:29:47,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20401590] [2023-08-29 19:29:47,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:47,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:29:47,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:47,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:29:47,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:29:47,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-29 19:29:47,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 233 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 19:29:47,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:47,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-29 19:29:47,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:48,152 INFO L130 PetriNetUnfolder]: 1425/2519 cut-off events. [2023-08-29 19:29:48,153 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-29 19:29:48,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5087 conditions, 2519 events. 1425/2519 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 10881 event pairs, 1060 based on Foata normal form. 0/2008 useless extension candidates. Maximal degree in co-relation 5076. Up to 2277 conditions per place. [2023-08-29 19:29:48,161 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 70 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2023-08-29 19:29:48,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 396 flow [2023-08-29 19:29:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:29:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:29:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1026 transitions. [2023-08-29 19:29:48,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541832669322709 [2023-08-29 19:29:48,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1026 transitions. [2023-08-29 19:29:48,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1026 transitions. [2023-08-29 19:29:48,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:48,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1026 transitions. [2023-08-29 19:29:48,166 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 19:29:48,169 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 19:29:48,169 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 19:29:48,169 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 233 flow. Second operand 3 states and 1026 transitions. [2023-08-29 19:29:48,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 396 flow [2023-08-29 19:29:48,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:48,172 INFO L231 Difference]: Finished difference. Result has 83 places, 79 transitions, 236 flow [2023-08-29 19:29:48,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=83, PETRI_TRANSITIONS=79} [2023-08-29 19:29:48,173 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -56 predicate places. [2023-08-29 19:29:48,173 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 79 transitions, 236 flow [2023-08-29 19:29:48,173 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 19:29:48,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:48,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:48,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-29 19:29:48,175 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 19:29:48,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1682506611, now seen corresponding path program 1 times [2023-08-29 19:29:48,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:48,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597920397] [2023-08-29 19:29:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:48,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:48,717 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 19:29:48,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:48,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597920397] [2023-08-29 19:29:48,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597920397] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:48,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:48,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 19:29:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23452354] [2023-08-29 19:29:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:48,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 19:29:48,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 19:29:48,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:29:49,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 753 [2023-08-29 19:29:49,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 79 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 290.625) internal successors, (2325), 8 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:49,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:49,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 753 [2023-08-29 19:29:49,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:49,996 INFO L130 PetriNetUnfolder]: 1631/2857 cut-off events. [2023-08-29 19:29:49,996 INFO L131 PetriNetUnfolder]: For 169/169 co-relation queries the response was YES. [2023-08-29 19:29:49,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5872 conditions, 2857 events. 1631/2857 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12455 event pairs, 493 based on Foata normal form. 9/2326 useless extension candidates. Maximal degree in co-relation 5861. Up to 2374 conditions per place. [2023-08-29 19:29:50,004 INFO L137 encePairwiseOnDemand]: 744/753 looper letters, 90 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2023-08-29 19:29:50,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 524 flow [2023-08-29 19:29:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:29:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:29:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1832 transitions. [2023-08-29 19:29:50,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40548915449313855 [2023-08-29 19:29:50,009 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1832 transitions. [2023-08-29 19:29:50,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1832 transitions. [2023-08-29 19:29:50,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:50,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1832 transitions. [2023-08-29 19:29:50,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 305.3333333333333) internal successors, (1832), 6 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:50,017 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 19:29:50,018 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 19:29:50,018 INFO L175 Difference]: Start difference. First operand has 83 places, 79 transitions, 236 flow. Second operand 6 states and 1832 transitions. [2023-08-29 19:29:50,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 524 flow [2023-08-29 19:29:50,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 510 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:29:50,022 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 287 flow [2023-08-29 19:29:50,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2023-08-29 19:29:50,022 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -51 predicate places. [2023-08-29 19:29:50,022 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 287 flow [2023-08-29 19:29:50,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 290.625) internal successors, (2325), 8 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:50,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:50,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:50,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-29 19:29:50,023 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 19:29:50,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1552665017, now seen corresponding path program 2 times [2023-08-29 19:29:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912237528] [2023-08-29 19:29:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:50,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:29:50,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:50,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912237528] [2023-08-29 19:29:50,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912237528] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:50,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:50,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-29 19:29:50,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419112640] [2023-08-29 19:29:50,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:50,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-29 19:29:50,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-29 19:29:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-29 19:29:54,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 753 [2023-08-29 19:29:54,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 287 flow. Second operand has 8 states, 8 states have (on average 289.625) internal successors, (2317), 8 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:54,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:54,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 753 [2023-08-29 19:29:54,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:55,479 INFO L130 PetriNetUnfolder]: 1665/2951 cut-off events. [2023-08-29 19:29:55,479 INFO L131 PetriNetUnfolder]: For 395/395 co-relation queries the response was YES. [2023-08-29 19:29:55,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6155 conditions, 2951 events. 1665/2951 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 13110 event pairs, 1216 based on Foata normal form. 18/2417 useless extension candidates. Maximal degree in co-relation 6142. Up to 2446 conditions per place. [2023-08-29 19:29:55,488 INFO L137 encePairwiseOnDemand]: 745/753 looper letters, 76 selfloop transitions, 13 changer transitions 0/98 dead transitions. [2023-08-29 19:29:55,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 98 transitions, 502 flow [2023-08-29 19:29:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-29 19:29:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-29 19:29:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2101 transitions. [2023-08-29 19:29:55,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39859609182318345 [2023-08-29 19:29:55,493 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2101 transitions. [2023-08-29 19:29:55,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2101 transitions. [2023-08-29 19:29:55,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:55,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2101 transitions. [2023-08-29 19:29:55,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 300.14285714285717) internal successors, (2101), 7 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:55,502 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 19:29:55,503 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 19:29:55,503 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 287 flow. Second operand 7 states and 2101 transitions. [2023-08-29 19:29:55,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 98 transitions, 502 flow [2023-08-29 19:29:55,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 483 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-29 19:29:55,506 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 307 flow [2023-08-29 19:29:55,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2023-08-29 19:29:55,507 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -47 predicate places. [2023-08-29 19:29:55,507 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 307 flow [2023-08-29 19:29:55,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 289.625) internal successors, (2317), 8 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:55,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:55,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:55,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-29 19:29:55,508 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 19:29:55,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1611999738, now seen corresponding path program 1 times [2023-08-29 19:29:55,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:55,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175011952] [2023-08-29 19:29:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:55,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:56,368 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 19:29:56,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:56,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175011952] [2023-08-29 19:29:56,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175011952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:56,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:56,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-29 19:29:56,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426463658] [2023-08-29 19:29:56,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:56,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-29 19:29:56,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:56,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-29 19:29:56,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-29 19:29:57,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 753 [2023-08-29 19:29:57,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 307 flow. Second operand has 10 states, 10 states have (on average 285.3) internal successors, (2853), 10 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:57,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:29:57,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 753 [2023-08-29 19:29:57,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:29:57,846 INFO L130 PetriNetUnfolder]: 1664/2928 cut-off events. [2023-08-29 19:29:57,847 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-08-29 19:29:57,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6180 conditions, 2928 events. 1664/2928 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 12849 event pairs, 1258 based on Foata normal form. 0/2375 useless extension candidates. Maximal degree in co-relation 6165. Up to 2697 conditions per place. [2023-08-29 19:29:57,856 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 74 selfloop transitions, 17 changer transitions 0/100 dead transitions. [2023-08-29 19:29:57,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 100 transitions, 537 flow [2023-08-29 19:29:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:29:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:29:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2642 transitions. [2023-08-29 19:29:57,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898480153460233 [2023-08-29 19:29:57,861 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2642 transitions. [2023-08-29 19:29:57,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2642 transitions. [2023-08-29 19:29:57,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:29:57,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2642 transitions. [2023-08-29 19:29:57,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 293.55555555555554) internal successors, (2642), 9 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:57,871 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 19:29:57,872 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 19:29:57,873 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 307 flow. Second operand 9 states and 2642 transitions. [2023-08-29 19:29:57,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 100 transitions, 537 flow [2023-08-29 19:29:57,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 100 transitions, 517 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-29 19:29:57,876 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 368 flow [2023-08-29 19:29:57,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=368, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2023-08-29 19:29:57,877 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -40 predicate places. [2023-08-29 19:29:57,877 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 368 flow [2023-08-29 19:29:57,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 285.3) internal successors, (2853), 10 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:29:57,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:29:57,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:29:57,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-29 19:29:57,878 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 19:29:57,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:29:57,879 INFO L85 PathProgramCache]: Analyzing trace with hash 829469450, now seen corresponding path program 1 times [2023-08-29 19:29:57,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:29:57,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773014187] [2023-08-29 19:29:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:29:57,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:29:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:29:58,695 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 19:29:58,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:29:58,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773014187] [2023-08-29 19:29:58,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773014187] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:29:58,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:29:58,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 19:29:58,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930666410] [2023-08-29 19:29:58,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:29:58,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:29:58,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:29:58,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:29:58,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:30:00,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 753 [2023-08-29 19:30:00,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 278.1666666666667) internal successors, (3338), 12 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:00,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:30:00,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 753 [2023-08-29 19:30:00,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:30:01,302 INFO L130 PetriNetUnfolder]: 1824/3209 cut-off events. [2023-08-29 19:30:01,302 INFO L131 PetriNetUnfolder]: For 400/400 co-relation queries the response was YES. [2023-08-29 19:30:01,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 3209 events. 1824/3209 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 14462 event pairs, 565 based on Foata normal form. 0/2614 useless extension candidates. Maximal degree in co-relation 6871. Up to 2222 conditions per place. [2023-08-29 19:30:01,318 INFO L137 encePairwiseOnDemand]: 742/753 looper letters, 115 selfloop transitions, 23 changer transitions 0/147 dead transitions. [2023-08-29 19:30:01,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 147 transitions, 776 flow [2023-08-29 19:30:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:30:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:30:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2617 transitions. [2023-08-29 19:30:01,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38615906743396783 [2023-08-29 19:30:01,325 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2617 transitions. [2023-08-29 19:30:01,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2617 transitions. [2023-08-29 19:30:01,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:30:01,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2617 transitions. [2023-08-29 19:30:01,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 290.77777777777777) internal successors, (2617), 9 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:01,336 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 19:30:01,338 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 19:30:01,338 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 368 flow. Second operand 9 states and 2617 transitions. [2023-08-29 19:30:01,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 147 transitions, 776 flow [2023-08-29 19:30:01,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 147 transitions, 748 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-29 19:30:01,342 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 423 flow [2023-08-29 19:30:01,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=423, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2023-08-29 19:30:01,343 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -35 predicate places. [2023-08-29 19:30:01,343 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 423 flow [2023-08-29 19:30:01,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 278.1666666666667) internal successors, (3338), 12 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:30:01,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:30:01,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:30:01,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-29 19:30:01,345 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 19:30:01,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:30:01,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1567339102, now seen corresponding path program 2 times [2023-08-29 19:30:01,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:30:01,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026296575] [2023-08-29 19:30:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:30:01,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:30:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:32:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:32:09,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:32:09,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026296575] [2023-08-29 19:32:09,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026296575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:32:09,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:32:09,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-29 19:32:09,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744525104] [2023-08-29 19:32:09,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:32:09,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 19:32:09,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:32:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 19:32:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-29 19:32:56,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 753 [2023-08-29 19:32:56,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 423 flow. Second operand has 13 states, 13 states have (on average 267.0769230769231) internal successors, (3472), 13 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:32:56,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:32:56,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 753 [2023-08-29 19:32:56,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:01,442 INFO L130 PetriNetUnfolder]: 2089/3679 cut-off events. [2023-08-29 19:33:01,443 INFO L131 PetriNetUnfolder]: For 867/867 co-relation queries the response was YES. [2023-08-29 19:33:01,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8200 conditions, 3679 events. 2089/3679 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17436 event pairs, 1345 based on Foata normal form. 0/2988 useless extension candidates. Maximal degree in co-relation 8180. Up to 2499 conditions per place. [2023-08-29 19:33:01,454 INFO L137 encePairwiseOnDemand]: 739/753 looper letters, 119 selfloop transitions, 30 changer transitions 0/158 dead transitions. [2023-08-29 19:33:01,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 912 flow [2023-08-29 19:33:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-29 19:33:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-29 19:33:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3595 transitions. [2023-08-29 19:33:01,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3672489529063234 [2023-08-29 19:33:01,461 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3595 transitions. [2023-08-29 19:33:01,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3595 transitions. [2023-08-29 19:33:01,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:01,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3595 transitions. [2023-08-29 19:33:01,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 276.53846153846155) internal successors, (3595), 13 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:01,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 753.0) internal successors, (10542), 14 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:01,476 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 753.0) internal successors, (10542), 14 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:01,476 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 423 flow. Second operand 13 states and 3595 transitions. [2023-08-29 19:33:01,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 912 flow [2023-08-29 19:33:01,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 158 transitions, 866 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-29 19:33:01,483 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 556 flow [2023-08-29 19:33:01,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=556, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2023-08-29 19:33:01,483 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -24 predicate places. [2023-08-29 19:33:01,483 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 556 flow [2023-08-29 19:33:01,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 267.0769230769231) internal successors, (3472), 13 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:01,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:01,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-29 19:33:01,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-29 19:33:01,485 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 19:33:01,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1567656232, now seen corresponding path program 3 times [2023-08-29 19:33:01,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:01,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354978068] [2023-08-29 19:33:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:01,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:33:02,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:02,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354978068] [2023-08-29 19:33:02,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354978068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:02,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:02,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-29 19:33:02,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217115837] [2023-08-29 19:33:02,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:02,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:33:02,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:02,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:33:02,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:33:06,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 753 [2023-08-29 19:33:06,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 556 flow. Second operand has 12 states, 12 states have (on average 265.1666666666667) internal successors, (3182), 12 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:06,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:06,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 753 [2023-08-29 19:33:06,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:08,329 INFO L130 PetriNetUnfolder]: 2076/3660 cut-off events. [2023-08-29 19:33:08,329 INFO L131 PetriNetUnfolder]: For 1290/1290 co-relation queries the response was YES. [2023-08-29 19:33:08,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8355 conditions, 3660 events. 2076/3660 cut-off events. For 1290/1290 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 17292 event pairs, 1375 based on Foata normal form. 0/2982 useless extension candidates. Maximal degree in co-relation 8330. Up to 2501 conditions per place. [2023-08-29 19:33:08,342 INFO L137 encePairwiseOnDemand]: 740/753 looper letters, 108 selfloop transitions, 27 changer transitions 0/143 dead transitions. [2023-08-29 19:33:08,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 143 transitions, 911 flow [2023-08-29 19:33:08,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:33:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:33:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2761 transitions. [2023-08-29 19:33:08,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2023-08-29 19:33:08,346 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2761 transitions. [2023-08-29 19:33:08,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2761 transitions. [2023-08-29 19:33:08,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:08,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2761 transitions. [2023-08-29 19:33:08,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 276.1) internal successors, (2761), 10 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:08,353 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 19:33:08,354 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 19:33:08,354 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 556 flow. Second operand 10 states and 2761 transitions. [2023-08-29 19:33:08,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 143 transitions, 911 flow [2023-08-29 19:33:08,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 143 transitions, 874 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-29 19:33:08,360 INFO L231 Difference]: Finished difference. Result has 116 places, 100 transitions, 565 flow [2023-08-29 19:33:08,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=565, PETRI_PLACES=116, PETRI_TRANSITIONS=100} [2023-08-29 19:33:08,360 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -23 predicate places. [2023-08-29 19:33:08,361 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 100 transitions, 565 flow [2023-08-29 19:33:08,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 265.1666666666667) internal successors, (3182), 12 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:08,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:08,361 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 19:33:08,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-29 19:33:08,361 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:33:08,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:08,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1027074210, now seen corresponding path program 1 times [2023-08-29 19:33:08,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:08,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771369489] [2023-08-29 19:33:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:08,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:09,073 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 19:33:09,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:09,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771369489] [2023-08-29 19:33:09,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771369489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:09,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:09,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-29 19:33:09,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052244209] [2023-08-29 19:33:09,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:09,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-29 19:33:09,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-29 19:33:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-29 19:33:10,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 753 [2023-08-29 19:33:10,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 100 transitions, 565 flow. Second operand has 11 states, 11 states have (on average 270.54545454545456) internal successors, (2976), 11 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:10,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:10,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 753 [2023-08-29 19:33:10,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:10,921 INFO L130 PetriNetUnfolder]: 2235/3928 cut-off events. [2023-08-29 19:33:10,922 INFO L131 PetriNetUnfolder]: For 1582/1582 co-relation queries the response was YES. [2023-08-29 19:33:10,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9160 conditions, 3928 events. 2235/3928 cut-off events. For 1582/1582 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 18836 event pairs, 1557 based on Foata normal form. 0/3201 useless extension candidates. Maximal degree in co-relation 9135. Up to 3373 conditions per place. [2023-08-29 19:33:10,935 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 109 selfloop transitions, 20 changer transitions 0/137 dead transitions. [2023-08-29 19:33:10,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 137 transitions, 962 flow [2023-08-29 19:33:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:33:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:33:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2797 transitions. [2023-08-29 19:33:10,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37144754316069056 [2023-08-29 19:33:10,938 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2797 transitions. [2023-08-29 19:33:10,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2797 transitions. [2023-08-29 19:33:10,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:10,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2797 transitions. [2023-08-29 19:33:10,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 279.7) internal successors, (2797), 10 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:10,944 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 19:33:10,945 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 19:33:10,945 INFO L175 Difference]: Start difference. First operand has 116 places, 100 transitions, 565 flow. Second operand 10 states and 2797 transitions. [2023-08-29 19:33:10,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 137 transitions, 962 flow [2023-08-29 19:33:10,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 896 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-29 19:33:10,954 INFO L231 Difference]: Finished difference. Result has 119 places, 104 transitions, 608 flow [2023-08-29 19:33:10,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=608, PETRI_PLACES=119, PETRI_TRANSITIONS=104} [2023-08-29 19:33:10,954 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -20 predicate places. [2023-08-29 19:33:10,955 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 104 transitions, 608 flow [2023-08-29 19:33:10,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 270.54545454545456) internal successors, (2976), 11 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:10,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:10,955 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 19:33:10,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-29 19:33:10,956 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:33:10,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:10,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1146690374, now seen corresponding path program 1 times [2023-08-29 19:33:10,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:10,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590312643] [2023-08-29 19:33:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:10,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:11,742 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 19:33:11,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:11,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590312643] [2023-08-29 19:33:11,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590312643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:11,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:11,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:33:11,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262889853] [2023-08-29 19:33:11,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:11,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:33:11,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:33:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:33:13,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-29 19:33:13,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 104 transitions, 608 flow. Second operand has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:13,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:13,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-29 19:33:13,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:14,175 INFO L130 PetriNetUnfolder]: 2209/3888 cut-off events. [2023-08-29 19:33:14,175 INFO L131 PetriNetUnfolder]: For 1608/1608 co-relation queries the response was YES. [2023-08-29 19:33:14,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9065 conditions, 3888 events. 2209/3888 cut-off events. For 1608/1608 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 18624 event pairs, 669 based on Foata normal form. 18/3270 useless extension candidates. Maximal degree in co-relation 9037. Up to 2362 conditions per place. [2023-08-29 19:33:14,190 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 122 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2023-08-29 19:33:14,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 159 transitions, 1036 flow [2023-08-29 19:33:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-29 19:33:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-29 19:33:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2525 transitions. [2023-08-29 19:33:14,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725837391176037 [2023-08-29 19:33:14,194 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2525 transitions. [2023-08-29 19:33:14,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2525 transitions. [2023-08-29 19:33:14,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:14,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2525 transitions. [2023-08-29 19:33:14,196 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 19:33:14,200 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 19:33:14,201 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 19:33:14,201 INFO L175 Difference]: Start difference. First operand has 119 places, 104 transitions, 608 flow. Second operand 9 states and 2525 transitions. [2023-08-29 19:33:14,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 159 transitions, 1036 flow [2023-08-29 19:33:14,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 159 transitions, 1009 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-29 19:33:14,210 INFO L231 Difference]: Finished difference. Result has 122 places, 104 transitions, 651 flow [2023-08-29 19:33:14,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=651, PETRI_PLACES=122, PETRI_TRANSITIONS=104} [2023-08-29 19:33:14,211 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -17 predicate places. [2023-08-29 19:33:14,211 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 104 transitions, 651 flow [2023-08-29 19:33:14,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:14,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:14,212 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 19:33:14,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-29 19:33:14,212 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 19:33:14,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2037496838, now seen corresponding path program 2 times [2023-08-29 19:33:14,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:14,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572266316] [2023-08-29 19:33:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:14,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:14,988 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 19:33:14,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:14,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572266316] [2023-08-29 19:33:14,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572266316] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:14,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:14,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-29 19:33:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725928974] [2023-08-29 19:33:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:14,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-29 19:33:14,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:14,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-29 19:33:14,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-29 19:33:17,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 753 [2023-08-29 19:33:17,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 104 transitions, 651 flow. Second operand has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:17,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:17,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 753 [2023-08-29 19:33:17,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:17,816 INFO L130 PetriNetUnfolder]: 2196/3858 cut-off events. [2023-08-29 19:33:17,816 INFO L131 PetriNetUnfolder]: For 2360/2360 co-relation queries the response was YES. [2023-08-29 19:33:17,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 3858 events. 2196/3858 cut-off events. For 2360/2360 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 18387 event pairs, 573 based on Foata normal form. 9/3235 useless extension candidates. Maximal degree in co-relation 9225. Up to 2070 conditions per place. [2023-08-29 19:33:17,830 INFO L137 encePairwiseOnDemand]: 743/753 looper letters, 118 selfloop transitions, 30 changer transitions 0/156 dead transitions. [2023-08-29 19:33:17,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 156 transitions, 1063 flow [2023-08-29 19:33:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-29 19:33:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-29 19:33:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2788 transitions. [2023-08-29 19:33:17,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3702523240371846 [2023-08-29 19:33:17,834 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2788 transitions. [2023-08-29 19:33:17,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2788 transitions. [2023-08-29 19:33:17,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:17,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2788 transitions. [2023-08-29 19:33:17,837 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 19:33:17,842 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 19:33:17,842 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 19:33:17,842 INFO L175 Difference]: Start difference. First operand has 122 places, 104 transitions, 651 flow. Second operand 10 states and 2788 transitions. [2023-08-29 19:33:17,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 156 transitions, 1063 flow [2023-08-29 19:33:17,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 156 transitions, 1024 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-29 19:33:17,856 INFO L231 Difference]: Finished difference. Result has 126 places, 105 transitions, 693 flow [2023-08-29 19:33:17,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=693, PETRI_PLACES=126, PETRI_TRANSITIONS=105} [2023-08-29 19:33:17,856 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -13 predicate places. [2023-08-29 19:33:17,857 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 105 transitions, 693 flow [2023-08-29 19:33:17,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 268.5) internal successors, (3222), 12 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:17,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:17,857 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 19:33:17,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-29 19:33:17,858 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:33:17,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash 278044459, now seen corresponding path program 1 times [2023-08-29 19:33:17,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:17,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106322912] [2023-08-29 19:33:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:17,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:18,595 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 19:33:18,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106322912] [2023-08-29 19:33:18,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106322912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:18,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:18,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-29 19:33:18,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455827181] [2023-08-29 19:33:18,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:18,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-29 19:33:18,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:18,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-29 19:33:18,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-29 19:33:19,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 753 [2023-08-29 19:33:19,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 105 transitions, 693 flow. Second operand has 13 states, 13 states have (on average 282.7692307692308) internal successors, (3676), 13 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:19,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:19,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 753 [2023-08-29 19:33:19,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:20,567 INFO L130 PetriNetUnfolder]: 2290/4019 cut-off events. [2023-08-29 19:33:20,567 INFO L131 PetriNetUnfolder]: For 3014/3014 co-relation queries the response was YES. [2023-08-29 19:33:20,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9745 conditions, 4019 events. 2290/4019 cut-off events. For 3014/3014 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 19277 event pairs, 1554 based on Foata normal form. 0/3360 useless extension candidates. Maximal degree in co-relation 9715. Up to 3317 conditions per place. [2023-08-29 19:33:20,583 INFO L137 encePairwiseOnDemand]: 737/753 looper letters, 140 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2023-08-29 19:33:20,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 181 transitions, 1261 flow [2023-08-29 19:33:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-29 19:33:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-29 19:33:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 4646 transitions. [2023-08-29 19:33:20,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856241699867198 [2023-08-29 19:33:20,587 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 4646 transitions. [2023-08-29 19:33:20,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 4646 transitions. [2023-08-29 19:33:20,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:20,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 4646 transitions. [2023-08-29 19:33:20,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 290.375) internal successors, (4646), 16 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:20,600 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 19:33:20,601 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 19:33:20,601 INFO L175 Difference]: Start difference. First operand has 126 places, 105 transitions, 693 flow. Second operand 16 states and 4646 transitions. [2023-08-29 19:33:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 181 transitions, 1261 flow [2023-08-29 19:33:20,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 181 transitions, 1213 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-29 19:33:20,614 INFO L231 Difference]: Finished difference. Result has 141 places, 120 transitions, 828 flow [2023-08-29 19:33:20,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=828, PETRI_PLACES=141, PETRI_TRANSITIONS=120} [2023-08-29 19:33:20,615 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-08-29 19:33:20,615 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 120 transitions, 828 flow [2023-08-29 19:33:20,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 282.7692307692308) internal successors, (3676), 13 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:20,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:20,616 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] [2023-08-29 19:33:20,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-29 19:33:20,616 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:33:20,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:20,616 INFO L85 PathProgramCache]: Analyzing trace with hash -743280340, now seen corresponding path program 1 times [2023-08-29 19:33:20,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:20,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121102885] [2023-08-29 19:33:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:20,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:20,670 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 19:33:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:20,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121102885] [2023-08-29 19:33:20,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121102885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:20,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:20,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:33:20,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283365016] [2023-08-29 19:33:20,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:20,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:33:20,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:33:20,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:33:20,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 753 [2023-08-29 19:33:20,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 120 transitions, 828 flow. Second operand has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:20,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:20,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 753 [2023-08-29 19:33:20,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:21,431 INFO L130 PetriNetUnfolder]: 3507/6511 cut-off events. [2023-08-29 19:33:21,432 INFO L131 PetriNetUnfolder]: For 5158/5173 co-relation queries the response was YES. [2023-08-29 19:33:21,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 6511 events. 3507/6511 cut-off events. For 5158/5173 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 38350 event pairs, 1626 based on Foata normal form. 13/5634 useless extension candidates. Maximal degree in co-relation 15591. Up to 3549 conditions per place. [2023-08-29 19:33:21,454 INFO L137 encePairwiseOnDemand]: 750/753 looper letters, 171 selfloop transitions, 2 changer transitions 0/190 dead transitions. [2023-08-29 19:33:21,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 190 transitions, 1568 flow [2023-08-29 19:33:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:33:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:33:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1066 transitions. [2023-08-29 19:33:21,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4718902169101372 [2023-08-29 19:33:21,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1066 transitions. [2023-08-29 19:33:21,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1066 transitions. [2023-08-29 19:33:21,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:21,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1066 transitions. [2023-08-29 19:33:21,456 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 19:33:21,457 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 19:33:21,457 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 19:33:21,457 INFO L175 Difference]: Start difference. First operand has 141 places, 120 transitions, 828 flow. Second operand 3 states and 1066 transitions. [2023-08-29 19:33:21,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 190 transitions, 1568 flow [2023-08-29 19:33:21,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 190 transitions, 1530 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-08-29 19:33:21,472 INFO L231 Difference]: Finished difference. Result has 137 places, 121 transitions, 807 flow [2023-08-29 19:33:21,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=807, PETRI_PLACES=137, PETRI_TRANSITIONS=121} [2023-08-29 19:33:21,473 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, -2 predicate places. [2023-08-29 19:33:21,473 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 121 transitions, 807 flow [2023-08-29 19:33:21,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:21,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:21,473 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] [2023-08-29 19:33:21,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-29 19:33:21,474 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 19:33:21,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:21,474 INFO L85 PathProgramCache]: Analyzing trace with hash 666388507, now seen corresponding path program 1 times [2023-08-29 19:33:21,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:21,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560046808] [2023-08-29 19:33:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:21,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:21,616 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 19:33:21,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:21,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560046808] [2023-08-29 19:33:21,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560046808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:21,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:21,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-29 19:33:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631700948] [2023-08-29 19:33:21,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:21,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-29 19:33:21,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:21,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-29 19:33:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-29 19:33:21,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 316 out of 753 [2023-08-29 19:33:21,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 121 transitions, 807 flow. Second operand has 4 states, 4 states have (on average 321.5) internal successors, (1286), 4 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:21,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:21,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 316 of 753 [2023-08-29 19:33:21,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:22,538 INFO L130 PetriNetUnfolder]: 4385/7753 cut-off events. [2023-08-29 19:33:22,538 INFO L131 PetriNetUnfolder]: For 6341/6352 co-relation queries the response was YES. [2023-08-29 19:33:22,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20465 conditions, 7753 events. 4385/7753 cut-off events. For 6341/6352 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 46461 event pairs, 1938 based on Foata normal form. 11/6994 useless extension candidates. Maximal degree in co-relation 20426. Up to 5843 conditions per place. [2023-08-29 19:33:22,581 INFO L137 encePairwiseOnDemand]: 748/753 looper letters, 148 selfloop transitions, 3 changer transitions 0/168 dead transitions. [2023-08-29 19:33:22,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 1292 flow [2023-08-29 19:33:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-29 19:33:22,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-29 19:33:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1356 transitions. [2023-08-29 19:33:22,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450199203187251 [2023-08-29 19:33:22,582 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1356 transitions. [2023-08-29 19:33:22,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1356 transitions. [2023-08-29 19:33:22,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:22,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1356 transitions. [2023-08-29 19:33:22,584 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 19:33:22,585 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 19:33:22,585 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 19:33:22,585 INFO L175 Difference]: Start difference. First operand has 137 places, 121 transitions, 807 flow. Second operand 4 states and 1356 transitions. [2023-08-29 19:33:22,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 1292 flow [2023-08-29 19:33:22,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 168 transitions, 1288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:33:22,603 INFO L231 Difference]: Finished difference. Result has 140 places, 122 transitions, 821 flow [2023-08-29 19:33:22,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=821, PETRI_PLACES=140, PETRI_TRANSITIONS=122} [2023-08-29 19:33:22,603 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 1 predicate places. [2023-08-29 19:33:22,603 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 122 transitions, 821 flow [2023-08-29 19:33:22,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 321.5) internal successors, (1286), 4 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:22,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:22,604 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, 1] [2023-08-29 19:33:22,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-29 19:33:22,604 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 19:33:22,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash -389843816, now seen corresponding path program 1 times [2023-08-29 19:33:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:22,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348077219] [2023-08-29 19:33:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:22,642 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 19:33:22,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:22,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348077219] [2023-08-29 19:33:22,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348077219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:22,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:22,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:33:22,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069695091] [2023-08-29 19:33:22,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:22,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:33:22,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:33:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:33:22,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 753 [2023-08-29 19:33:22,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 122 transitions, 821 flow. Second operand has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:22,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:22,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 753 [2023-08-29 19:33:22,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:23,093 INFO L130 PetriNetUnfolder]: 2775/5047 cut-off events. [2023-08-29 19:33:23,093 INFO L131 PetriNetUnfolder]: For 5031/5042 co-relation queries the response was YES. [2023-08-29 19:33:23,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13941 conditions, 5047 events. 2775/5047 cut-off events. For 5031/5042 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 28180 event pairs, 1432 based on Foata normal form. 11/4844 useless extension candidates. Maximal degree in co-relation 13901. Up to 2521 conditions per place. [2023-08-29 19:33:23,117 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 122 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2023-08-29 19:33:23,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 139 transitions, 1140 flow [2023-08-29 19:33:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:33:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:33:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1030 transitions. [2023-08-29 19:33:23,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45595396193005755 [2023-08-29 19:33:23,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1030 transitions. [2023-08-29 19:33:23,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1030 transitions. [2023-08-29 19:33:23,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:23,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1030 transitions. [2023-08-29 19:33:23,119 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 19:33:23,120 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 19:33:23,120 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 19:33:23,120 INFO L175 Difference]: Start difference. First operand has 140 places, 122 transitions, 821 flow. Second operand 3 states and 1030 transitions. [2023-08-29 19:33:23,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 139 transitions, 1140 flow [2023-08-29 19:33:23,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 1132 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-29 19:33:23,136 INFO L231 Difference]: Finished difference. Result has 141 places, 122 transitions, 828 flow [2023-08-29 19:33:23,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=828, PETRI_PLACES=141, PETRI_TRANSITIONS=122} [2023-08-29 19:33:23,136 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-08-29 19:33:23,137 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 122 transitions, 828 flow [2023-08-29 19:33:23,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:23,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:23,137 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 19:33:23,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-29 19:33:23,137 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:33:23,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:23,138 INFO L85 PathProgramCache]: Analyzing trace with hash -474233831, now seen corresponding path program 1 times [2023-08-29 19:33:23,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:23,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229228355] [2023-08-29 19:33:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:23,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:23,208 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 19:33:23,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:23,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229228355] [2023-08-29 19:33:23,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229228355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:23,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:23,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-29 19:33:23,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619852332] [2023-08-29 19:33:23,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:23,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-29 19:33:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-29 19:33:23,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-29 19:33:23,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 753 [2023-08-29 19:33:23,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 122 transitions, 828 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 19:33:23,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:23,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 753 [2023-08-29 19:33:23,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:23,571 INFO L130 PetriNetUnfolder]: 2270/4315 cut-off events. [2023-08-29 19:33:23,571 INFO L131 PetriNetUnfolder]: For 3323/3326 co-relation queries the response was YES. [2023-08-29 19:33:23,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11882 conditions, 4315 events. 2270/4315 cut-off events. For 3323/3326 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 23431 event pairs, 619 based on Foata normal form. 375/4589 useless extension candidates. Maximal degree in co-relation 11841. Up to 2858 conditions per place. [2023-08-29 19:33:23,591 INFO L137 encePairwiseOnDemand]: 747/753 looper letters, 114 selfloop transitions, 7 changer transitions 0/135 dead transitions. [2023-08-29 19:33:23,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 135 transitions, 1126 flow [2023-08-29 19:33:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-29 19:33:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-29 19:33:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1021 transitions. [2023-08-29 19:33:23,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45196989818503763 [2023-08-29 19:33:23,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1021 transitions. [2023-08-29 19:33:23,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1021 transitions. [2023-08-29 19:33:23,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:23,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1021 transitions. [2023-08-29 19:33:23,594 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 19:33:23,595 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 19:33:23,595 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 19:33:23,595 INFO L175 Difference]: Start difference. First operand has 141 places, 122 transitions, 828 flow. Second operand 3 states and 1021 transitions. [2023-08-29 19:33:23,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 135 transitions, 1126 flow [2023-08-29 19:33:23,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 135 transitions, 1120 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-29 19:33:23,607 INFO L231 Difference]: Finished difference. Result has 141 places, 122 transitions, 836 flow [2023-08-29 19:33:23,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=836, PETRI_PLACES=141, PETRI_TRANSITIONS=122} [2023-08-29 19:33:23,607 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-08-29 19:33:23,607 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 122 transitions, 836 flow [2023-08-29 19:33:23,608 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 19:33:23,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:23,608 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 19:33:23,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-29 19:33:23,608 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:33:23,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash -661974617, now seen corresponding path program 1 times [2023-08-29 19:33:23,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:23,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730417666] [2023-08-29 19:33:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:23,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:23,684 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 19:33:23,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:23,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730417666] [2023-08-29 19:33:23,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730417666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-29 19:33:23,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571276349] [2023-08-29 19:33:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:23,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:33:23,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-29 19:33:23,688 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 19:33:23,701 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 19:33:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-29 19:33:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-29 19:33:23,893 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 19:33:23,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-29 19:33:23,910 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 19:33:23,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571276349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-29 19:33:23,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-29 19:33:23,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-29 19:33:23,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595612794] [2023-08-29 19:33:23,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-29 19:33:23,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-29 19:33:23,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-29 19:33:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-29 19:33:23,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 753 [2023-08-29 19:33:23,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 122 transitions, 836 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 19:33:23,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:23,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 753 [2023-08-29 19:33:23,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:24,922 INFO L130 PetriNetUnfolder]: 3466/7091 cut-off events. [2023-08-29 19:33:24,923 INFO L131 PetriNetUnfolder]: For 5649/5674 co-relation queries the response was YES. [2023-08-29 19:33:24,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19182 conditions, 7091 events. 3466/7091 cut-off events. For 5649/5674 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 47032 event pairs, 538 based on Foata normal form. 611/7386 useless extension candidates. Maximal degree in co-relation 19141. Up to 1443 conditions per place. [2023-08-29 19:33:24,956 INFO L137 encePairwiseOnDemand]: 749/753 looper letters, 316 selfloop transitions, 6 changer transitions 0/338 dead transitions. [2023-08-29 19:33:24,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 338 transitions, 2518 flow [2023-08-29 19:33:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-29 19:33:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-29 19:33:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2149 transitions. [2023-08-29 19:33:24,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756529437804338 [2023-08-29 19:33:24,958 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2149 transitions. [2023-08-29 19:33:24,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2149 transitions. [2023-08-29 19:33:24,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:24,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2149 transitions. [2023-08-29 19:33:24,961 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 19:33:24,963 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 19:33:24,964 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 19:33:24,964 INFO L175 Difference]: Start difference. First operand has 141 places, 122 transitions, 836 flow. Second operand 6 states and 2149 transitions. [2023-08-29 19:33:24,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 338 transitions, 2518 flow [2023-08-29 19:33:24,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 338 transitions, 2495 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-29 19:33:24,982 INFO L231 Difference]: Finished difference. Result has 149 places, 125 transitions, 870 flow [2023-08-29 19:33:24,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=870, PETRI_PLACES=149, PETRI_TRANSITIONS=125} [2023-08-29 19:33:24,983 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 10 predicate places. [2023-08-29 19:33:24,983 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 125 transitions, 870 flow [2023-08-29 19:33:24,983 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 19:33:24,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:24,984 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 19:33:24,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-29 19:33:25,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-29 19:33:25,190 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-08-29 19:33:25,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:25,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1551848466, now seen corresponding path program 1 times [2023-08-29 19:33:25,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:25,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455614405] [2023-08-29 19:33:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:25,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:26,196 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 19:33:26,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:26,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455614405] [2023-08-29 19:33:26,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455614405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:26,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:26,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:33:26,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020302018] [2023-08-29 19:33:26,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:26,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-29 19:33:26,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-29 19:33:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-29 19:33:28,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 753 [2023-08-29 19:33:28,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 125 transitions, 870 flow. Second operand has 15 states, 15 states have (on average 273.93333333333334) internal successors, (4109), 15 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:28,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:28,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 753 [2023-08-29 19:33:28,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:29,571 INFO L130 PetriNetUnfolder]: 3870/7558 cut-off events. [2023-08-29 19:33:29,571 INFO L131 PetriNetUnfolder]: For 12158/12190 co-relation queries the response was YES. [2023-08-29 19:33:29,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23327 conditions, 7558 events. 3870/7558 cut-off events. For 12158/12190 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 47709 event pairs, 1991 based on Foata normal form. 23/7234 useless extension candidates. Maximal degree in co-relation 23282. Up to 3690 conditions per place. [2023-08-29 19:33:29,617 INFO L137 encePairwiseOnDemand]: 737/753 looper letters, 194 selfloop transitions, 46 changer transitions 0/247 dead transitions. [2023-08-29 19:33:29,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 247 transitions, 2097 flow [2023-08-29 19:33:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:33:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:33:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4236 transitions. [2023-08-29 19:33:29,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3750332005312085 [2023-08-29 19:33:29,620 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4236 transitions. [2023-08-29 19:33:29,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4236 transitions. [2023-08-29 19:33:29,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:29,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4236 transitions. [2023-08-29 19:33:29,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 282.4) internal successors, (4236), 15 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:29,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:29,633 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:29,633 INFO L175 Difference]: Start difference. First operand has 149 places, 125 transitions, 870 flow. Second operand 15 states and 4236 transitions. [2023-08-29 19:33:29,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 247 transitions, 2097 flow [2023-08-29 19:33:29,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 247 transitions, 1992 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-08-29 19:33:29,669 INFO L231 Difference]: Finished difference. Result has 167 places, 131 transitions, 1029 flow [2023-08-29 19:33:29,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1029, PETRI_PLACES=167, PETRI_TRANSITIONS=131} [2023-08-29 19:33:29,670 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 28 predicate places. [2023-08-29 19:33:29,670 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 131 transitions, 1029 flow [2023-08-29 19:33:29,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 273.93333333333334) internal successors, (4109), 15 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:29,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:29,671 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 19:33:29,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-29 19:33:29,671 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 19:33:29,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1021400250, now seen corresponding path program 2 times [2023-08-29 19:33:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:29,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245779201] [2023-08-29 19:33:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:30,591 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 19:33:30,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:30,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245779201] [2023-08-29 19:33:30,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245779201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:30,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:30,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-08-29 19:33:30,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097714846] [2023-08-29 19:33:30,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:30,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:33:30,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:30,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:33:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:33:32,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 753 [2023-08-29 19:33:32,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 131 transitions, 1029 flow. Second operand has 16 states, 16 states have (on average 260.8125) internal successors, (4173), 16 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:32,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:32,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 753 [2023-08-29 19:33:32,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:33,890 INFO L130 PetriNetUnfolder]: 3849/7565 cut-off events. [2023-08-29 19:33:33,890 INFO L131 PetriNetUnfolder]: For 11518/11550 co-relation queries the response was YES. [2023-08-29 19:33:33,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23497 conditions, 7565 events. 3849/7565 cut-off events. For 11518/11550 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 47769 event pairs, 1271 based on Foata normal form. 23/7245 useless extension candidates. Maximal degree in co-relation 23446. Up to 2764 conditions per place. [2023-08-29 19:33:33,926 INFO L137 encePairwiseOnDemand]: 737/753 looper letters, 193 selfloop transitions, 47 changer transitions 0/247 dead transitions. [2023-08-29 19:33:33,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 247 transitions, 2140 flow [2023-08-29 19:33:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-29 19:33:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-29 19:33:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 4033 transitions. [2023-08-29 19:33:33,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570606463036742 [2023-08-29 19:33:33,930 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 4033 transitions. [2023-08-29 19:33:33,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 4033 transitions. [2023-08-29 19:33:33,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:33,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 4033 transitions. [2023-08-29 19:33:33,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 268.8666666666667) internal successors, (4033), 15 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:33,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:33,940 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 753.0) internal successors, (12048), 16 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:33,941 INFO L175 Difference]: Start difference. First operand has 167 places, 131 transitions, 1029 flow. Second operand 15 states and 4033 transitions. [2023-08-29 19:33:33,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 247 transitions, 2140 flow [2023-08-29 19:33:33,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 247 transitions, 2059 flow, removed 10 selfloop flow, removed 9 redundant places. [2023-08-29 19:33:33,976 INFO L231 Difference]: Finished difference. Result has 176 places, 136 transitions, 1120 flow [2023-08-29 19:33:33,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1120, PETRI_PLACES=176, PETRI_TRANSITIONS=136} [2023-08-29 19:33:33,976 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 37 predicate places. [2023-08-29 19:33:33,976 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 136 transitions, 1120 flow [2023-08-29 19:33:33,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 260.8125) internal successors, (4173), 16 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:33,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:33,977 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 19:33:33,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-29 19:33:33,978 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 19:33:33,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:33,978 INFO L85 PathProgramCache]: Analyzing trace with hash 634248710, now seen corresponding path program 1 times [2023-08-29 19:33:33,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:33,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999299556] [2023-08-29 19:33:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:33,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-29 19:33:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-29 19:33:35,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-29 19:33:35,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999299556] [2023-08-29 19:33:35,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999299556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-29 19:33:35,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-29 19:33:35,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-29 19:33:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228436221] [2023-08-29 19:33:35,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-29 19:33:35,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-29 19:33:35,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-29 19:33:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-29 19:33:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-08-29 19:33:47,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 753 [2023-08-29 19:33:47,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 136 transitions, 1120 flow. Second operand has 16 states, 16 states have (on average 261.875) internal successors, (4190), 16 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:47,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-29 19:33:47,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 753 [2023-08-29 19:33:47,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-29 19:33:50,383 INFO L130 PetriNetUnfolder]: 5003/9805 cut-off events. [2023-08-29 19:33:50,384 INFO L131 PetriNetUnfolder]: For 16636/16676 co-relation queries the response was YES. [2023-08-29 19:33:50,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30841 conditions, 9805 events. 5003/9805 cut-off events. For 16636/16676 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 65457 event pairs, 2778 based on Foata normal form. 0/9431 useless extension candidates. Maximal degree in co-relation 30787. Up to 5662 conditions per place. [2023-08-29 19:33:50,451 INFO L137 encePairwiseOnDemand]: 735/753 looper letters, 237 selfloop transitions, 42 changer transitions 0/286 dead transitions. [2023-08-29 19:33:50,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 286 transitions, 2567 flow [2023-08-29 19:33:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-29 19:33:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-29 19:33:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3816 transitions. [2023-08-29 19:33:50,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619806488332385 [2023-08-29 19:33:50,455 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3816 transitions. [2023-08-29 19:33:50,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3816 transitions. [2023-08-29 19:33:50,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-29 19:33:50,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3816 transitions. [2023-08-29 19:33:50,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 272.57142857142856) internal successors, (3816), 14 states have internal predecessors, (3816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:50,464 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 19:33:50,465 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 19:33:50,465 INFO L175 Difference]: Start difference. First operand has 176 places, 136 transitions, 1120 flow. Second operand 14 states and 3816 transitions. [2023-08-29 19:33:50,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 286 transitions, 2567 flow [2023-08-29 19:33:50,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 286 transitions, 2488 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-29 19:33:50,508 INFO L231 Difference]: Finished difference. Result has 188 places, 146 transitions, 1334 flow [2023-08-29 19:33:50,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1334, PETRI_PLACES=188, PETRI_TRANSITIONS=146} [2023-08-29 19:33:50,509 INFO L281 CegarLoopForPetriNet]: 139 programPoint places, 49 predicate places. [2023-08-29 19:33:50,509 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 146 transitions, 1334 flow [2023-08-29 19:33:50,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 261.875) internal successors, (4190), 16 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-29 19:33:50,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-29 19:33:50,509 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 19:33:50,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-29 19:33:50,510 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 19:33:50,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-29 19:33:50,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1261413180, now seen corresponding path program 2 times [2023-08-29 19:33:50,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-29 19:33:50,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847331627] [2023-08-29 19:33:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-29 19:33:50,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-29 19:33:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15