./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.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-deagle/circular_buffer_ok.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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --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 [2023-08-30 01:33:48,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 01:33:48,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 01:33:48,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 01:33:48,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 01:33:48,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 01:33:48,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 01:33:48,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 01:33:48,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 01:33:48,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 01:33:48,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 01:33:48,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 01:33:48,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 01:33:48,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 01:33:48,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 01:33:48,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 01:33:48,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 01:33:48,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 01:33:48,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 01:33:48,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 01:33:48,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 01:33:48,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 01:33:48,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 01:33:48,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 01:33:48,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 01:33:48,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 01:33:48,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 01:33:48,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 01:33:48,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 01:33:48,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 01:33:48,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 01:33:48,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 01:33:48,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 01:33:48,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 01:33:48,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 01:33:48,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 01:33:48,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 01:33:48,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 01:33:48,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 01:33:48,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 01:33:48,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 01:33:48,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 01:33:48,555 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 01:33:48,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 01:33:48,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 01:33:48,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 01:33:48,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 01:33:48,558 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 01:33:48,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 01:33:48,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 01:33:48,558 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 01:33:48,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 01:33:48,560 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 01:33:48,560 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 01:33:48,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 01:33:48,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 01:33:48,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 01:33:48,561 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 01:33:48,561 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 01:33:48,561 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 01:33:48,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 01:33:48,562 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 01:33:48,562 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 01:33:48,566 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 01:33:48,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 01:33:48,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 01:33:48,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 01:33:48,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:33:48,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 01:33:48,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 01:33:48,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 01:33:48,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 01:33:48,570 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 01:33:48,570 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 01:33:48,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 01:33:48,570 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 01:33:48,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 01:33:48,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 01:33:48,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 01:33:48,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 01:33:48,880 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 01:33:48,881 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 01:33:48,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-08-30 01:33:50,058 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 01:33:50,375 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 01:33:50,376 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2023-08-30 01:33:50,394 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a6ab744/23c6a1a968dc4bceae9762ddde98a6de/FLAGb4b16a432 [2023-08-30 01:33:50,406 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65a6ab744/23c6a1a968dc4bceae9762ddde98a6de [2023-08-30 01:33:50,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 01:33:50,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 01:33:50,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 01:33:50,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 01:33:50,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 01:33:50,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b327163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50, skipping insertion in model container [2023-08-30 01:33:50,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 01:33:50,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 01:33:50,700 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-deagle/circular_buffer_ok.i[30451,30464] [2023-08-30 01:33:50,709 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-deagle/circular_buffer_ok.i[30681,30694] [2023-08-30 01:33:50,714 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-deagle/circular_buffer_ok.i[30979,30992] [2023-08-30 01:33:50,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:33:50,737 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 01:33:50,785 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-deagle/circular_buffer_ok.i[30451,30464] [2023-08-30 01:33:50,786 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-deagle/circular_buffer_ok.i[30681,30694] [2023-08-30 01:33:50,788 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-deagle/circular_buffer_ok.i[30979,30992] [2023-08-30 01:33:50,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 01:33:50,843 INFO L208 MainTranslator]: Completed translation [2023-08-30 01:33:50,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50 WrapperNode [2023-08-30 01:33:50,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 01:33:50,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 01:33:50,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 01:33:50,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 01:33:50,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,900 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 142 [2023-08-30 01:33:50,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 01:33:50,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 01:33:50,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 01:33:50,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 01:33:50,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,935 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 01:33:50,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 01:33:50,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 01:33:50,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 01:33:50,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (1/1) ... [2023-08-30 01:33:50,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 01:33:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:33:50,977 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 01:33:50,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 01:33:51,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 01:33:51,017 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-30 01:33:51,018 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-30 01:33:51,018 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-30 01:33:51,018 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-30 01:33:51,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 01:33:51,018 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-30 01:33:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 01:33:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 01:33:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 01:33:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-30 01:33:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 01:33:51,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 01:33:51,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 01:33:51,021 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 01:33:51,158 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 01:33:51,160 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 01:33:51,438 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 01:33:51,446 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 01:33:51,446 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 01:33:51,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:33:51 BoogieIcfgContainer [2023-08-30 01:33:51,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 01:33:51,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 01:33:51,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 01:33:51,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 01:33:51,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 01:33:50" (1/3) ... [2023-08-30 01:33:51,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa2cdb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:33:51, skipping insertion in model container [2023-08-30 01:33:51,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 01:33:50" (2/3) ... [2023-08-30 01:33:51,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa2cdb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 01:33:51, skipping insertion in model container [2023-08-30 01:33:51,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 01:33:51" (3/3) ... [2023-08-30 01:33:51,455 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2023-08-30 01:33:51,467 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 01:33:51,467 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-08-30 01:33:51,467 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 01:33:51,549 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 01:33:51,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 164 transitions, 344 flow [2023-08-30 01:33:51,648 INFO L130 PetriNetUnfolder]: 11/162 cut-off events. [2023-08-30 01:33:51,649 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:33:51,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 162 events. 11/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 345 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-30 01:33:51,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 164 transitions, 344 flow [2023-08-30 01:33:51,660 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 158 transitions, 328 flow [2023-08-30 01:33:51,663 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 01:33:51,672 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 158 transitions, 328 flow [2023-08-30 01:33:51,675 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 158 transitions, 328 flow [2023-08-30 01:33:51,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 158 transitions, 328 flow [2023-08-30 01:33:51,710 INFO L130 PetriNetUnfolder]: 11/158 cut-off events. [2023-08-30 01:33:51,711 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 01:33:51,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 158 events. 11/158 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 345 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-30 01:33:51,715 INFO L119 LiptonReduction]: Number of co-enabled transitions 5570 [2023-08-30 01:33:57,445 INFO L134 LiptonReduction]: Checked pairs total: 14674 [2023-08-30 01:33:57,445 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-30 01:33:57,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 01:33:57,468 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;@488624ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 01:33:57,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-08-30 01:33:57,470 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2023-08-30 01:33:57,470 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 01:33:57,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:33:57,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-30 01:33:57,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:33:57,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:33:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash 648, now seen corresponding path program 1 times [2023-08-30 01:33:57,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:33:57,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388489225] [2023-08-30 01:33:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:33:57,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:33:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:33:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:33:57,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:33:57,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388489225] [2023-08-30 01:33:57,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388489225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:33:57,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:33:57,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-30 01:33:57,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564572712] [2023-08-30 01:33:57,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:33:57,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-30 01:33:57,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:33:57,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-30 01:33:57,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-30 01:33:57,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 314 [2023-08-30 01:33:57,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 116 flow. Second operand has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:57,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:33:57,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 314 [2023-08-30 01:33:57,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:33:57,828 INFO L130 PetriNetUnfolder]: 1306/2110 cut-off events. [2023-08-30 01:33:57,828 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2023-08-30 01:33:57,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4077 conditions, 2110 events. 1306/2110 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 11023 event pairs, 994 based on Foata normal form. 48/1126 useless extension candidates. Maximal degree in co-relation 3825. Up to 1926 conditions per place. [2023-08-30 01:33:57,842 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 41 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2023-08-30 01:33:57,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 192 flow [2023-08-30 01:33:57,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-30 01:33:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-30 01:33:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 348 transitions. [2023-08-30 01:33:57,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554140127388535 [2023-08-30 01:33:57,856 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 348 transitions. [2023-08-30 01:33:57,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 348 transitions. [2023-08-30 01:33:57,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:33:57,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 348 transitions. [2023-08-30 01:33:57,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:57,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:57,866 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:57,868 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 116 flow. Second operand 2 states and 348 transitions. [2023-08-30 01:33:57,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 192 flow [2023-08-30 01:33:57,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 01:33:57,872 INFO L231 Difference]: Finished difference. Result has 47 places, 49 transitions, 102 flow [2023-08-30 01:33:57,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2023-08-30 01:33:57,877 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 01:33:57,877 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 102 flow [2023-08-30 01:33:57,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 152.5) internal successors, (305), 2 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:57,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:33:57,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:33:57,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 01:33:57,879 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:33:57,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:33:57,879 INFO L85 PathProgramCache]: Analyzing trace with hash 636707, now seen corresponding path program 1 times [2023-08-30 01:33:57,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:33:57,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782512539] [2023-08-30 01:33:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:33:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:33:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:33:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:33:58,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:33:58,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782512539] [2023-08-30 01:33:58,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782512539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:33:58,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:33:58,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:33:58,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144365319] [2023-08-30 01:33:58,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:33:58,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:33:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:33:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:33:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:33:58,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-08-30 01:33:58,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 49 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:33:58,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-08-30 01:33:58,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:33:58,374 INFO L130 PetriNetUnfolder]: 1278/2053 cut-off events. [2023-08-30 01:33:58,375 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 01:33:58,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 2053 events. 1278/2053 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 10627 event pairs, 972 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 3940. Up to 1874 conditions per place. [2023-08-30 01:33:58,386 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 37 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-30 01:33:58,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 176 flow [2023-08-30 01:33:58,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:33:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:33:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-30 01:33:58,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116772823779193 [2023-08-30 01:33:58,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-30 01:33:58,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-30 01:33:58,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:33:58,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-30 01:33:58,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,399 INFO L175 Difference]: Start difference. First operand has 47 places, 49 transitions, 102 flow. Second operand 3 states and 482 transitions. [2023-08-30 01:33:58,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 176 flow [2023-08-30 01:33:58,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 176 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 01:33:58,402 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 102 flow [2023-08-30 01:33:58,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-30 01:33:58,403 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 01:33:58,403 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 102 flow [2023-08-30 01:33:58,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:33:58,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 01:33:58,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 01:33:58,405 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:33:58,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:33:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash 636709, now seen corresponding path program 1 times [2023-08-30 01:33:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:33:58,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644973447] [2023-08-30 01:33:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:33:58,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:33:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:33:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:33:58,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:33:58,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644973447] [2023-08-30 01:33:58,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644973447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:33:58,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:33:58,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:33:58,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696705895] [2023-08-30 01:33:58,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:33:58,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:33:58,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:33:58,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:33:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:33:58,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 314 [2023-08-30 01:33:58,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:33:58,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 314 [2023-08-30 01:33:58,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:33:58,697 INFO L130 PetriNetUnfolder]: 1250/1996 cut-off events. [2023-08-30 01:33:58,697 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-08-30 01:33:58,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3839 conditions, 1996 events. 1250/1996 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10197 event pairs, 950 based on Foata normal form. 0/1038 useless extension candidates. Maximal degree in co-relation 3835. Up to 1824 conditions per place. [2023-08-30 01:33:58,706 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-30 01:33:58,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 172 flow [2023-08-30 01:33:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:33:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:33:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-30 01:33:58,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968152866242038 [2023-08-30 01:33:58,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-30 01:33:58,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-30 01:33:58,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:33:58,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-30 01:33:58,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,713 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 102 flow. Second operand 3 states and 468 transitions. [2023-08-30 01:33:58,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 172 flow [2023-08-30 01:33:58,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:33:58,715 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 98 flow [2023-08-30 01:33:58,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-30 01:33:58,715 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-30 01:33:58,716 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 98 flow [2023-08-30 01:33:58,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:33:58,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:33:58,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 01:33:58,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:33:58,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:33:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash 611864871, now seen corresponding path program 1 times [2023-08-30 01:33:58,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:33:58,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573580524] [2023-08-30 01:33:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:33:58,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:33:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:33:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:33:58,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:33:58,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573580524] [2023-08-30 01:33:58,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573580524] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:33:58,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:33:58,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:33:58,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891867159] [2023-08-30 01:33:58,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:33:58,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:33:58,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:33:58,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:33:58,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:33:58,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2023-08-30 01:33:58,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:58,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:33:58,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2023-08-30 01:33:58,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:33:59,220 INFO L130 PetriNetUnfolder]: 1939/3219 cut-off events. [2023-08-30 01:33:59,221 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-08-30 01:33:59,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6072 conditions, 3219 events. 1939/3219 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17053 event pairs, 691 based on Foata normal form. 0/1761 useless extension candidates. Maximal degree in co-relation 6068. Up to 1717 conditions per place. [2023-08-30 01:33:59,238 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 63 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-30 01:33:59,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 74 transitions, 293 flow [2023-08-30 01:33:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:33:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:33:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-08-30 01:33:59,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456475583864119 [2023-08-30 01:33:59,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-08-30 01:33:59,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-08-30 01:33:59,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:33:59,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-08-30 01:33:59,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:59,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:59,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:59,261 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 98 flow. Second operand 3 states and 514 transitions. [2023-08-30 01:33:59,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 74 transitions, 293 flow [2023-08-30 01:33:59,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 74 transitions, 287 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:33:59,263 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 119 flow [2023-08-30 01:33:59,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-30 01:33:59,264 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-08-30 01:33:59,264 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 119 flow [2023-08-30 01:33:59,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:59,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:33:59,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:33:59,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 01:33:59,265 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:33:59,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:33:59,266 INFO L85 PathProgramCache]: Analyzing trace with hash 611864870, now seen corresponding path program 1 times [2023-08-30 01:33:59,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:33:59,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746341543] [2023-08-30 01:33:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:33:59,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:33:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:33:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:33:59,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:33:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746341543] [2023-08-30 01:33:59,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746341543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:33:59,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:33:59,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:33:59,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014685672] [2023-08-30 01:33:59,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:33:59,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:33:59,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:33:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:33:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:33:59,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 314 [2023-08-30 01:33:59,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:59,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:33:59,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 314 [2023-08-30 01:33:59,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:33:59,610 INFO L130 PetriNetUnfolder]: 1865/3024 cut-off events. [2023-08-30 01:33:59,610 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2023-08-30 01:33:59,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6148 conditions, 3024 events. 1865/3024 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15523 event pairs, 1415 based on Foata normal form. 0/1831 useless extension candidates. Maximal degree in co-relation 6143. Up to 2694 conditions per place. [2023-08-30 01:33:59,627 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-30 01:33:59,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 189 flow [2023-08-30 01:33:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:33:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:33:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-30 01:33:59,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021231422505308 [2023-08-30 01:33:59,630 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-30 01:33:59,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-30 01:33:59,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:33:59,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-30 01:33:59,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:59,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:59,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:59,636 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 119 flow. Second operand 3 states and 473 transitions. [2023-08-30 01:33:59,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 189 flow [2023-08-30 01:33:59,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:33:59,640 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 114 flow [2023-08-30 01:33:59,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-30 01:33:59,642 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-30 01:33:59,643 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 114 flow [2023-08-30 01:33:59,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:59,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:33:59,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:33:59,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 01:33:59,644 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:33:59,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:33:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash 611891360, now seen corresponding path program 1 times [2023-08-30 01:33:59,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:33:59,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630505054] [2023-08-30 01:33:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:33:59,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:33:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:33:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:33:59,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:33:59,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630505054] [2023-08-30 01:33:59,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630505054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:33:59,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:33:59,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:33:59,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713093165] [2023-08-30 01:33:59,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:33:59,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:33:59,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:33:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:33:59,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:33:59,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 314 [2023-08-30 01:33:59,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:33:59,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:33:59,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 314 [2023-08-30 01:33:59,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:00,025 INFO L130 PetriNetUnfolder]: 1242/2048 cut-off events. [2023-08-30 01:34:00,026 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-08-30 01:34:00,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4138 conditions, 2048 events. 1242/2048 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10119 event pairs, 920 based on Foata normal form. 0/1298 useless extension candidates. Maximal degree in co-relation 4133. Up to 1825 conditions per place. [2023-08-30 01:34:00,036 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 34 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-30 01:34:00,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 184 flow [2023-08-30 01:34:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:34:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:34:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-30 01:34:00,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989384288747346 [2023-08-30 01:34:00,039 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-30 01:34:00,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-30 01:34:00,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:00,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-30 01:34:00,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,043 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 114 flow. Second operand 3 states and 470 transitions. [2023-08-30 01:34:00,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 184 flow [2023-08-30 01:34:00,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:34:00,045 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 112 flow [2023-08-30 01:34:00,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-08-30 01:34:00,046 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-30 01:34:00,046 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 112 flow [2023-08-30 01:34:00,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:00,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 01:34:00,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 01:34:00,047 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:00,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:00,047 INFO L85 PathProgramCache]: Analyzing trace with hash 611891359, now seen corresponding path program 1 times [2023-08-30 01:34:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654524345] [2023-08-30 01:34:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:00,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:00,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:00,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654524345] [2023-08-30 01:34:00,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654524345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:00,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:34:00,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:34:00,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231920185] [2023-08-30 01:34:00,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:00,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:34:00,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:00,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:34:00,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:34:00,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 314 [2023-08-30 01:34:00,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:00,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 314 [2023-08-30 01:34:00,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:00,281 INFO L130 PetriNetUnfolder]: 797/1369 cut-off events. [2023-08-30 01:34:00,281 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-08-30 01:34:00,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2770 conditions, 1369 events. 797/1369 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6487 event pairs, 575 based on Foata normal form. 0/982 useless extension candidates. Maximal degree in co-relation 2765. Up to 1210 conditions per place. [2023-08-30 01:34:00,294 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 33 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-30 01:34:00,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 180 flow [2023-08-30 01:34:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:34:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:34:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-08-30 01:34:00,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47876857749469215 [2023-08-30 01:34:00,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-08-30 01:34:00,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-08-30 01:34:00,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:00,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-08-30 01:34:00,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,300 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 112 flow. Second operand 3 states and 451 transitions. [2023-08-30 01:34:00,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 180 flow [2023-08-30 01:34:00,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:34:00,302 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 110 flow [2023-08-30 01:34:00,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-08-30 01:34:00,303 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -9 predicate places. [2023-08-30 01:34:00,303 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 110 flow [2023-08-30 01:34:00,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:00,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-30 01:34:00,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 01:34:00,304 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:00,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:00,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1787942298, now seen corresponding path program 1 times [2023-08-30 01:34:00,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:00,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593392512] [2023-08-30 01:34:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:00,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:00,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:00,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593392512] [2023-08-30 01:34:00,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593392512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:00,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:34:00,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:34:00,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333228346] [2023-08-30 01:34:00,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:00,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:34:00,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:34:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:34:00,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-08-30 01:34:00,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:00,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-08-30 01:34:00,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:00,558 INFO L130 PetriNetUnfolder]: 653/1175 cut-off events. [2023-08-30 01:34:00,558 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2023-08-30 01:34:00,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 1175 events. 653/1175 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5295 event pairs, 183 based on Foata normal form. 0/891 useless extension candidates. Maximal degree in co-relation 2346. Up to 699 conditions per place. [2023-08-30 01:34:00,564 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-30 01:34:00,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 63 transitions, 263 flow [2023-08-30 01:34:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:34:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:34:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-30 01:34:00,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254777070063694 [2023-08-30 01:34:00,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-30 01:34:00,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-30 01:34:00,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:00,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-30 01:34:00,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,570 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,570 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 110 flow. Second operand 3 states and 495 transitions. [2023-08-30 01:34:00,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 63 transitions, 263 flow [2023-08-30 01:34:00,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 63 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:34:00,573 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 110 flow [2023-08-30 01:34:00,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-08-30 01:34:00,574 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-30 01:34:00,574 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 110 flow [2023-08-30 01:34:00,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:00,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:00,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 01:34:00,576 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:00,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash 224825544, now seen corresponding path program 1 times [2023-08-30 01:34:00,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:00,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856366556] [2023-08-30 01:34:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:00,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:00,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 01:34:00,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712981318] [2023-08-30 01:34:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:00,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:00,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:00,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:00,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 01:34:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:00,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:34:00,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:00,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:34:00,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856366556] [2023-08-30 01:34:00,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 01:34:00,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712981318] [2023-08-30 01:34:00,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712981318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:00,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:34:00,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:34:00,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257736969] [2023-08-30 01:34:00,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:00,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:34:00,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:00,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:34:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:34:00,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 314 [2023-08-30 01:34:00,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:00,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:00,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 314 [2023-08-30 01:34:00,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:01,018 INFO L130 PetriNetUnfolder]: 699/1294 cut-off events. [2023-08-30 01:34:01,018 INFO L131 PetriNetUnfolder]: For 158/158 co-relation queries the response was YES. [2023-08-30 01:34:01,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2632 conditions, 1294 events. 699/1294 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6393 event pairs, 231 based on Foata normal form. 0/1029 useless extension candidates. Maximal degree in co-relation 2626. Up to 537 conditions per place. [2023-08-30 01:34:01,023 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 61 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2023-08-30 01:34:01,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 76 transitions, 324 flow [2023-08-30 01:34:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:34:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:34:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 636 transitions. [2023-08-30 01:34:01,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063694267515924 [2023-08-30 01:34:01,026 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 636 transitions. [2023-08-30 01:34:01,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 636 transitions. [2023-08-30 01:34:01,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:01,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 636 transitions. [2023-08-30 01:34:01,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,031 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,031 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 110 flow. Second operand 4 states and 636 transitions. [2023-08-30 01:34:01,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 76 transitions, 324 flow [2023-08-30 01:34:01,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:34:01,035 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 140 flow [2023-08-30 01:34:01,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-30 01:34:01,036 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-30 01:34:01,037 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 140 flow [2023-08-30 01:34:01,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:01,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:01,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 01:34:01,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:01,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:01,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1384112314, now seen corresponding path program 1 times [2023-08-30 01:34:01,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:01,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289514630] [2023-08-30 01:34:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:01,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:01,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:01,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289514630] [2023-08-30 01:34:01,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289514630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:01,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:34:01,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 01:34:01,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026918659] [2023-08-30 01:34:01,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:01,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:34:01,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:01,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:34:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:34:01,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-08-30 01:34:01,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:01,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-08-30 01:34:01,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:01,489 INFO L130 PetriNetUnfolder]: 886/1554 cut-off events. [2023-08-30 01:34:01,489 INFO L131 PetriNetUnfolder]: For 957/957 co-relation queries the response was YES. [2023-08-30 01:34:01,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3735 conditions, 1554 events. 886/1554 cut-off events. For 957/957 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7191 event pairs, 361 based on Foata normal form. 0/1286 useless extension candidates. Maximal degree in co-relation 3727. Up to 908 conditions per place. [2023-08-30 01:34:01,497 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 60 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-08-30 01:34:01,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 353 flow [2023-08-30 01:34:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:34:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:34:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-08-30 01:34:01,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307855626326964 [2023-08-30 01:34:01,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-08-30 01:34:01,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-08-30 01:34:01,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:01,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-08-30 01:34:01,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,504 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 140 flow. Second operand 3 states and 500 transitions. [2023-08-30 01:34:01,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 353 flow [2023-08-30 01:34:01,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:34:01,508 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 151 flow [2023-08-30 01:34:01,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-08-30 01:34:01,510 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2023-08-30 01:34:01,510 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 151 flow [2023-08-30 01:34:01,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:01,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:01,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 01:34:01,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:01,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2056110489, now seen corresponding path program 1 times [2023-08-30 01:34:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:01,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813012094] [2023-08-30 01:34:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:01,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:01,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813012094] [2023-08-30 01:34:01,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813012094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:01,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:34:01,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:34:01,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865100298] [2023-08-30 01:34:01,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:34:01,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:34:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:34:01,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2023-08-30 01:34:01,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:01,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2023-08-30 01:34:01,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:01,768 INFO L130 PetriNetUnfolder]: 965/1848 cut-off events. [2023-08-30 01:34:01,768 INFO L131 PetriNetUnfolder]: For 638/638 co-relation queries the response was YES. [2023-08-30 01:34:01,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4306 conditions, 1848 events. 965/1848 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10047 event pairs, 430 based on Foata normal form. 0/1600 useless extension candidates. Maximal degree in co-relation 4297. Up to 1338 conditions per place. [2023-08-30 01:34:01,777 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 55 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-30 01:34:01,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 335 flow [2023-08-30 01:34:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:34:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:34:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-30 01:34:01,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529723991507431 [2023-08-30 01:34:01,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-30 01:34:01,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-30 01:34:01,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:01,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-30 01:34:01,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,783 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 151 flow. Second operand 3 states and 499 transitions. [2023-08-30 01:34:01,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 335 flow [2023-08-30 01:34:01,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:34:01,787 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 171 flow [2023-08-30 01:34:01,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-30 01:34:01,788 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-30 01:34:01,788 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 171 flow [2023-08-30 01:34:01,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:01,789 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:01,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 01:34:01,789 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:01,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:01,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1768746055, now seen corresponding path program 1 times [2023-08-30 01:34:01,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:01,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025949355] [2023-08-30 01:34:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:01,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:01,801 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 01:34:01,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511177376] [2023-08-30 01:34:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:01,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:01,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:01,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:01,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 01:34:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:01,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 01:34:01,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:01,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:34:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:01,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:01,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025949355] [2023-08-30 01:34:01,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 01:34:01,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511177376] [2023-08-30 01:34:01,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511177376] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 01:34:01,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 01:34:01,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-08-30 01:34:01,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894314430] [2023-08-30 01:34:01,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:01,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:34:01,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:34:01,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 01:34:01,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-08-30 01:34:01,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:01,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:01,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-08-30 01:34:01,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:02,104 INFO L130 PetriNetUnfolder]: 721/1327 cut-off events. [2023-08-30 01:34:02,104 INFO L131 PetriNetUnfolder]: For 814/814 co-relation queries the response was YES. [2023-08-30 01:34:02,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3192 conditions, 1327 events. 721/1327 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5921 event pairs, 249 based on Foata normal form. 114/1309 useless extension candidates. Maximal degree in co-relation 3182. Up to 744 conditions per place. [2023-08-30 01:34:02,111 INFO L137 encePairwiseOnDemand]: 308/314 looper letters, 55 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2023-08-30 01:34:02,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 339 flow [2023-08-30 01:34:02,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:34:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:34:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-30 01:34:02,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233545647558386 [2023-08-30 01:34:02,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-30 01:34:02,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-30 01:34:02,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:02,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-30 01:34:02,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:02,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:02,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:02,117 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 171 flow. Second operand 3 states and 493 transitions. [2023-08-30 01:34:02,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 339 flow [2023-08-30 01:34:02,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 328 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 01:34:02,122 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 177 flow [2023-08-30 01:34:02,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-30 01:34:02,123 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-30 01:34:02,123 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 177 flow [2023-08-30 01:34:02,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:02,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:02,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:02,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 01:34:02,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 01:34:02,338 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:02,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1753815584, now seen corresponding path program 1 times [2023-08-30 01:34:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:02,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121414531] [2023-08-30 01:34:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:02,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:02,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 01:34:02,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766312790] [2023-08-30 01:34:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:02,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:02,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:02,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:02,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 01:34:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:02,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 01:34:02,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:02,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 01:34:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:02,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:34:02,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:02,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121414531] [2023-08-30 01:34:02,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 01:34:02,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766312790] [2023-08-30 01:34:02,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766312790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:02,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:34:02,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:34:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035467170] [2023-08-30 01:34:02,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:02,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:34:02,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:34:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:34:02,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-08-30 01:34:02,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:02,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:02,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-08-30 01:34:02,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:02,657 INFO L130 PetriNetUnfolder]: 616/1181 cut-off events. [2023-08-30 01:34:02,658 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2023-08-30 01:34:02,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2939 conditions, 1181 events. 616/1181 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 5166 event pairs, 188 based on Foata normal form. 30/1123 useless extension candidates. Maximal degree in co-relation 2928. Up to 616 conditions per place. [2023-08-30 01:34:02,664 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 49 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-30 01:34:02,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 333 flow [2023-08-30 01:34:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:34:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:34:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-30 01:34:02,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148619957537155 [2023-08-30 01:34:02,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-30 01:34:02,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-30 01:34:02,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:02,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-30 01:34:02,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:02,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:02,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:02,670 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 177 flow. Second operand 3 states and 485 transitions. [2023-08-30 01:34:02,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 333 flow [2023-08-30 01:34:02,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 01:34:02,673 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 179 flow [2023-08-30 01:34:02,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-08-30 01:34:02,674 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-08-30 01:34:02,674 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 179 flow [2023-08-30 01:34:02,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:02,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:02,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:02,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 01:34:02,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:02,881 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:02,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:02,881 INFO L85 PathProgramCache]: Analyzing trace with hash 87621160, now seen corresponding path program 1 times [2023-08-30 01:34:02,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:02,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735976832] [2023-08-30 01:34:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:02,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:02,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:02,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735976832] [2023-08-30 01:34:02,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735976832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:02,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:34:02,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:34:02,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001512889] [2023-08-30 01:34:02,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:02,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:34:02,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:34:02,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:34:02,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2023-08-30 01:34:02,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:02,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:02,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2023-08-30 01:34:02,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:03,118 INFO L130 PetriNetUnfolder]: 780/1564 cut-off events. [2023-08-30 01:34:03,118 INFO L131 PetriNetUnfolder]: For 965/977 co-relation queries the response was YES. [2023-08-30 01:34:03,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3950 conditions, 1564 events. 780/1564 cut-off events. For 965/977 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7874 event pairs, 351 based on Foata normal form. 34/1517 useless extension candidates. Maximal degree in co-relation 3939. Up to 935 conditions per place. [2023-08-30 01:34:03,128 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 64 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-30 01:34:03,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 435 flow [2023-08-30 01:34:03,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:34:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:34:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-30 01:34:03,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318471337579618 [2023-08-30 01:34:03,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-30 01:34:03,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-30 01:34:03,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:03,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-30 01:34:03,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:03,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:03,136 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:03,136 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 179 flow. Second operand 3 states and 501 transitions. [2023-08-30 01:34:03,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 435 flow [2023-08-30 01:34:03,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:34:03,140 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 187 flow [2023-08-30 01:34:03,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-30 01:34:03,141 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-30 01:34:03,141 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 187 flow [2023-08-30 01:34:03,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:03,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:03,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:03,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 01:34:03,142 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:03,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:03,143 INFO L85 PathProgramCache]: Analyzing trace with hash 926893698, now seen corresponding path program 1 times [2023-08-30 01:34:03,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:03,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149624451] [2023-08-30 01:34:03,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:03,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:03,157 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 01:34:03,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489459290] [2023-08-30 01:34:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:03,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:03,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:03,161 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:03,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 01:34:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:03,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-30 01:34:03,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:03,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:34:03,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:34:03,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:34:03,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-30 01:34:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:03,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:34:03,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:03,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149624451] [2023-08-30 01:34:03,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 01:34:03,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489459290] [2023-08-30 01:34:03,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489459290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:03,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:34:03,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 01:34:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191659802] [2023-08-30 01:34:03,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:03,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:34:03,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:34:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 01:34:03,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-08-30 01:34:03,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:03,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:03,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-08-30 01:34:03,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:03,769 INFO L130 PetriNetUnfolder]: 1169/2351 cut-off events. [2023-08-30 01:34:03,769 INFO L131 PetriNetUnfolder]: For 1822/1836 co-relation queries the response was YES. [2023-08-30 01:34:03,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6232 conditions, 2351 events. 1169/2351 cut-off events. For 1822/1836 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13034 event pairs, 655 based on Foata normal form. 0/2233 useless extension candidates. Maximal degree in co-relation 6219. Up to 1260 conditions per place. [2023-08-30 01:34:03,800 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 65 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-30 01:34:03,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 438 flow [2023-08-30 01:34:03,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:34:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:34:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-30 01:34:03,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529723991507431 [2023-08-30 01:34:03,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-30 01:34:03,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-30 01:34:03,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:03,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-30 01:34:03,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:03,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:03,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:03,806 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 187 flow. Second operand 3 states and 499 transitions. [2023-08-30 01:34:03,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 438 flow [2023-08-30 01:34:03,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 435 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:34:03,811 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 197 flow [2023-08-30 01:34:03,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-30 01:34:03,811 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-08-30 01:34:03,811 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 197 flow [2023-08-30 01:34:03,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:03,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:03,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:03,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 01:34:04,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 01:34:04,018 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:04,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:04,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2002078106, now seen corresponding path program 1 times [2023-08-30 01:34:04,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:04,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934030210] [2023-08-30 01:34:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:04,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:04,030 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 01:34:04,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344397885] [2023-08-30 01:34:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:04,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:04,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:04,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:04,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 01:34:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:04,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-30 01:34:04,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:04,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:34:04,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:04,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934030210] [2023-08-30 01:34:04,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 01:34:04,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344397885] [2023-08-30 01:34:04,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344397885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:04,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:34:04,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 01:34:04,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279389317] [2023-08-30 01:34:04,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:04,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 01:34:04,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:04,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 01:34:04,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 01:34:04,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 314 [2023-08-30 01:34:04,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:04,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:04,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 314 [2023-08-30 01:34:04,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:04,606 INFO L130 PetriNetUnfolder]: 837/1699 cut-off events. [2023-08-30 01:34:04,606 INFO L131 PetriNetUnfolder]: For 1244/1256 co-relation queries the response was YES. [2023-08-30 01:34:04,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4472 conditions, 1699 events. 837/1699 cut-off events. For 1244/1256 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 8381 event pairs, 309 based on Foata normal form. 0/1645 useless extension candidates. Maximal degree in co-relation 4458. Up to 715 conditions per place. [2023-08-30 01:34:04,615 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 70 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-30 01:34:04,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 460 flow [2023-08-30 01:34:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:34:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:34:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-08-30 01:34:04,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5015923566878981 [2023-08-30 01:34:04,618 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-08-30 01:34:04,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-08-30 01:34:04,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:04,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-08-30 01:34:04,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:04,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:04,622 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:04,622 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 197 flow. Second operand 4 states and 630 transitions. [2023-08-30 01:34:04,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 460 flow [2023-08-30 01:34:04,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 458 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 01:34:04,626 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 205 flow [2023-08-30 01:34:04,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2023-08-30 01:34:04,626 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2023-08-30 01:34:04,626 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 205 flow [2023-08-30 01:34:04,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:04,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:04,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:04,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 01:34:04,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 01:34:04,833 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:04,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:04,834 INFO L85 PathProgramCache]: Analyzing trace with hash -316564774, now seen corresponding path program 1 times [2023-08-30 01:34:04,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:04,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727126060] [2023-08-30 01:34:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:04,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:04,847 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 01:34:04,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970723497] [2023-08-30 01:34:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:04,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:04,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:04,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:04,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 01:34:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 01:34:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:05,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:34:05,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-30 01:34:05,124 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-30 01:34:05,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-30 01:34:05,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-30 01:34:05,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-30 01:34:05,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2023-08-30 01:34:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:05,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:34:05,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:05,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727126060] [2023-08-30 01:34:05,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 01:34:05,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970723497] [2023-08-30 01:34:05,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970723497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:05,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 01:34:05,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-30 01:34:05,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720956598] [2023-08-30 01:34:05,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:05,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:34:05,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:05,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:34:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:34:05,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 314 [2023-08-30 01:34:05,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 205 flow. Second operand has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:05,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:05,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 314 [2023-08-30 01:34:05,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:06,210 INFO L130 PetriNetUnfolder]: 1290/2586 cut-off events. [2023-08-30 01:34:06,213 INFO L131 PetriNetUnfolder]: For 1932/1954 co-relation queries the response was YES. [2023-08-30 01:34:06,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6828 conditions, 2586 events. 1290/2586 cut-off events. For 1932/1954 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 13347 event pairs, 524 based on Foata normal form. 4/2532 useless extension candidates. Maximal degree in co-relation 6813. Up to 787 conditions per place. [2023-08-30 01:34:06,227 INFO L137 encePairwiseOnDemand]: 304/314 looper letters, 107 selfloop transitions, 15 changer transitions 0/130 dead transitions. [2023-08-30 01:34:06,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 130 transitions, 746 flow [2023-08-30 01:34:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 01:34:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 01:34:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1313 transitions. [2023-08-30 01:34:06,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46461429582448693 [2023-08-30 01:34:06,232 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1313 transitions. [2023-08-30 01:34:06,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1313 transitions. [2023-08-30 01:34:06,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:06,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1313 transitions. [2023-08-30 01:34:06,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.88888888888889) internal successors, (1313), 9 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:06,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 314.0) internal successors, (3140), 10 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:06,240 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 314.0) internal successors, (3140), 10 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:06,240 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 205 flow. Second operand 9 states and 1313 transitions. [2023-08-30 01:34:06,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 130 transitions, 746 flow [2023-08-30 01:34:06,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 130 transitions, 738 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 01:34:06,246 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 301 flow [2023-08-30 01:34:06,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=301, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2023-08-30 01:34:06,247 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2023-08-30 01:34:06,247 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 301 flow [2023-08-30 01:34:06,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:06,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:06,248 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] [2023-08-30 01:34:06,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 01:34:06,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 01:34:06,456 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:06,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1119565154, now seen corresponding path program 1 times [2023-08-30 01:34:06,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:06,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363334386] [2023-08-30 01:34:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:06,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:06,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:06,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363334386] [2023-08-30 01:34:06,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363334386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 01:34:06,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933953242] [2023-08-30 01:34:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:06,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:06,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:06,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:06,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 01:34:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 01:34:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:06,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:34:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:06,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933953242] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:34:06,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 01:34:06,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-30 01:34:06,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122424225] [2023-08-30 01:34:06,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 01:34:06,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:34:06,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:06,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:34:06,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:34:06,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 314 [2023-08-30 01:34:06,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 147.75) internal successors, (1182), 8 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:06,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:06,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 314 [2023-08-30 01:34:06,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:07,684 INFO L130 PetriNetUnfolder]: 3598/7236 cut-off events. [2023-08-30 01:34:07,684 INFO L131 PetriNetUnfolder]: For 7259/7329 co-relation queries the response was YES. [2023-08-30 01:34:07,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20014 conditions, 7236 events. 3598/7236 cut-off events. For 7259/7329 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 48851 event pairs, 242 based on Foata normal form. 652/7802 useless extension candidates. Maximal degree in co-relation 19994. Up to 1309 conditions per place. [2023-08-30 01:34:07,800 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 271 selfloop transitions, 47 changer transitions 0/329 dead transitions. [2023-08-30 01:34:07,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 329 transitions, 2363 flow [2023-08-30 01:34:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 01:34:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 01:34:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2573 transitions. [2023-08-30 01:34:07,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121417197452229 [2023-08-30 01:34:07,807 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2573 transitions. [2023-08-30 01:34:07,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2573 transitions. [2023-08-30 01:34:07,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:07,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2573 transitions. [2023-08-30 01:34:07,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 160.8125) internal successors, (2573), 16 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:07,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 314.0) internal successors, (5338), 17 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:07,833 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 314.0) internal successors, (5338), 17 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:07,834 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 301 flow. Second operand 16 states and 2573 transitions. [2023-08-30 01:34:07,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 329 transitions, 2363 flow [2023-08-30 01:34:07,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 329 transitions, 2334 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-30 01:34:07,852 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 758 flow [2023-08-30 01:34:07,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=758, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-08-30 01:34:07,853 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 44 predicate places. [2023-08-30 01:34:07,853 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 758 flow [2023-08-30 01:34:07,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 147.75) internal successors, (1182), 8 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:07,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:07,854 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] [2023-08-30 01:34:07,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 01:34:08,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:08,060 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:08,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:08,061 INFO L85 PathProgramCache]: Analyzing trace with hash 411249242, now seen corresponding path program 1 times [2023-08-30 01:34:08,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:08,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530685191] [2023-08-30 01:34:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:08,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:08,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 01:34:08,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977946337] [2023-08-30 01:34:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:08,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:08,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:08,084 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:08,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 01:34:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:08,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-30 01:34:08,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:08,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:34:08,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:34:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 01:34:08,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-30 01:34:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:08,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:34:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:10,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530685191] [2023-08-30 01:34:10,249 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 01:34:10,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977946337] [2023-08-30 01:34:10,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977946337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:34:10,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:34:10,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 01:34:10,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219802148] [2023-08-30 01:34:10,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:34:10,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 01:34:10,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:10,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 01:34:10,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-30 01:34:10,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 314 [2023-08-30 01:34:10,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 758 flow. Second operand has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:10,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:10,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 314 [2023-08-30 01:34:10,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:11,120 INFO L130 PetriNetUnfolder]: 2852/5729 cut-off events. [2023-08-30 01:34:11,121 INFO L131 PetriNetUnfolder]: For 32252/32500 co-relation queries the response was YES. [2023-08-30 01:34:11,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23402 conditions, 5729 events. 2852/5729 cut-off events. For 32252/32500 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 35773 event pairs, 1335 based on Foata normal form. 246/5852 useless extension candidates. Maximal degree in co-relation 23369. Up to 2876 conditions per place. [2023-08-30 01:34:11,182 INFO L137 encePairwiseOnDemand]: 307/314 looper letters, 125 selfloop transitions, 3 changer transitions 0/136 dead transitions. [2023-08-30 01:34:11,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 136 transitions, 1360 flow [2023-08-30 01:34:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 01:34:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 01:34:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-30 01:34:11,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48089171974522293 [2023-08-30 01:34:11,185 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-30 01:34:11,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-30 01:34:11,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:11,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-30 01:34:11,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:11,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:11,189 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 314.0) internal successors, (1570), 5 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:11,189 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 758 flow. Second operand 4 states and 604 transitions. [2023-08-30 01:34:11,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 136 transitions, 1360 flow [2023-08-30 01:34:11,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 136 transitions, 1263 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-08-30 01:34:11,282 INFO L231 Difference]: Finished difference. Result has 90 places, 90 transitions, 668 flow [2023-08-30 01:34:11,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=668, PETRI_PLACES=90, PETRI_TRANSITIONS=90} [2023-08-30 01:34:11,282 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 38 predicate places. [2023-08-30 01:34:11,283 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 90 transitions, 668 flow [2023-08-30 01:34:11,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.75) internal successors, (1142), 8 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:11,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:11,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:11,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 01:34:11,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:11,490 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:11,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1418128194, now seen corresponding path program 1 times [2023-08-30 01:34:11,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:11,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411773194] [2023-08-30 01:34:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:11,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:11,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 01:34:11,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101916186] [2023-08-30 01:34:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:11,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:11,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:11,519 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:11,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 01:34:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:11,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-30 01:34:11,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:12,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:34:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:12,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:12,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411773194] [2023-08-30 01:34:12,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 01:34:12,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101916186] [2023-08-30 01:34:12,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101916186] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:34:12,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:34:12,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-08-30 01:34:12,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979949854] [2023-08-30 01:34:12,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:34:12,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 01:34:12,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 01:34:12,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-30 01:34:13,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 314 [2023-08-30 01:34:13,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 668 flow. Second operand has 12 states, 12 states have (on average 141.08333333333334) internal successors, (1693), 12 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:13,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:13,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 314 [2023-08-30 01:34:13,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:16,541 INFO L130 PetriNetUnfolder]: 3100/6440 cut-off events. [2023-08-30 01:34:16,541 INFO L131 PetriNetUnfolder]: For 34950/35126 co-relation queries the response was YES. [2023-08-30 01:34:16,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25609 conditions, 6440 events. 3100/6440 cut-off events. For 34950/35126 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 38762 event pairs, 838 based on Foata normal form. 78/6417 useless extension candidates. Maximal degree in co-relation 25577. Up to 1225 conditions per place. [2023-08-30 01:34:16,592 INFO L137 encePairwiseOnDemand]: 309/314 looper letters, 254 selfloop transitions, 11 changer transitions 0/275 dead transitions. [2023-08-30 01:34:16,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 275 transitions, 2543 flow [2023-08-30 01:34:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 01:34:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 01:34:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1504 transitions. [2023-08-30 01:34:16,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789808917197452 [2023-08-30 01:34:16,596 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1504 transitions. [2023-08-30 01:34:16,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1504 transitions. [2023-08-30 01:34:16,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:16,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1504 transitions. [2023-08-30 01:34:16,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 150.4) internal successors, (1504), 10 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:16,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 314.0) internal successors, (3454), 11 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:16,603 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 314.0) internal successors, (3454), 11 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:16,603 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 668 flow. Second operand 10 states and 1504 transitions. [2023-08-30 01:34:16,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 275 transitions, 2543 flow [2023-08-30 01:34:16,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 275 transitions, 2528 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 01:34:16,674 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 725 flow [2023-08-30 01:34:16,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=725, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2023-08-30 01:34:16,675 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 47 predicate places. [2023-08-30 01:34:16,675 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 725 flow [2023-08-30 01:34:16,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 141.08333333333334) internal successors, (1693), 12 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:16,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:16,676 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:16,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 01:34:16,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:16,883 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:16,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash 796499575, now seen corresponding path program 2 times [2023-08-30 01:34:16,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:16,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76448701] [2023-08-30 01:34:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:16,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-30 01:34:17,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:17,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76448701] [2023-08-30 01:34:17,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76448701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 01:34:17,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826500924] [2023-08-30 01:34:17,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:34:17,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:17,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:17,005 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:17,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 01:34:17,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 01:34:17,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:34:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-30 01:34:17,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-08-30 01:34:17,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 01:34:17,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826500924] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 01:34:17,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 01:34:17,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-30 01:34:17,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500341070] [2023-08-30 01:34:17,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 01:34:17,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 01:34:17,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:17,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 01:34:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 01:34:17,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 314 [2023-08-30 01:34:17,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 725 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:17,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:17,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 314 [2023-08-30 01:34:17,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:34:17,911 INFO L130 PetriNetUnfolder]: 3054/6333 cut-off events. [2023-08-30 01:34:17,911 INFO L131 PetriNetUnfolder]: For 34887/35015 co-relation queries the response was YES. [2023-08-30 01:34:17,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25502 conditions, 6333 events. 3054/6333 cut-off events. For 34887/35015 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 38224 event pairs, 2154 based on Foata normal form. 27/6251 useless extension candidates. Maximal degree in co-relation 25468. Up to 5212 conditions per place. [2023-08-30 01:34:17,958 INFO L137 encePairwiseOnDemand]: 312/314 looper letters, 77 selfloop transitions, 1 changer transitions 6/94 dead transitions. [2023-08-30 01:34:17,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 884 flow [2023-08-30 01:34:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 01:34:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 01:34:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-30 01:34:17,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49363057324840764 [2023-08-30 01:34:17,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-30 01:34:17,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-30 01:34:17,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:34:17,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-30 01:34:17,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:17,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:17,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:17,964 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 725 flow. Second operand 3 states and 465 transitions. [2023-08-30 01:34:17,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 884 flow [2023-08-30 01:34:18,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 94 transitions, 870 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-30 01:34:18,050 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 647 flow [2023-08-30 01:34:18,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=647, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2023-08-30 01:34:18,051 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2023-08-30 01:34:18,051 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 647 flow [2023-08-30 01:34:18,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:18,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:34:18,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:34:18,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 01:34:18,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-30 01:34:18,257 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:34:18,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:34:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash -25068098, now seen corresponding path program 1 times [2023-08-30 01:34:18,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:34:18,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544175918] [2023-08-30 01:34:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:34:18,281 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 01:34:18,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938810139] [2023-08-30 01:34:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:34:18,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:34:18,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:34:18,283 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:34:18,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 01:34:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 01:34:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 01:34:19,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:34:19,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-30 01:34:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:19,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:34:19,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-30 01:34:19,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 01:34:19,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 75 [2023-08-30 01:34:20,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 01:34:20,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 166 treesize of output 131 [2023-08-30 01:34:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:34:31,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:34:31,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544175918] [2023-08-30 01:34:31,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 01:34:31,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938810139] [2023-08-30 01:34:31,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938810139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:34:31,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:34:31,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2023-08-30 01:34:31,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446526741] [2023-08-30 01:34:31,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:34:31,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 01:34:31,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:34:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 01:34:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2023-08-30 01:34:40,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-08-30 01:34:57,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 314 [2023-08-30 01:34:57,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 647 flow. Second operand has 27 states, 27 states have (on average 114.29629629629629) internal successors, (3086), 27 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:34:57,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:34:57,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 314 [2023-08-30 01:34:57,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:35:13,744 WARN L222 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 117 DAG size of output: 113 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:35:41,496 WARN L222 SmtUtils]: Spent 10.93s on a formula simplification. DAG size of input: 67 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:36:07,084 WARN L222 SmtUtils]: Spent 11.33s on a formula simplification. DAG size of input: 79 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:36:39,315 WARN L222 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 76 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:36:54,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-08-30 01:36:58,169 INFO L130 PetriNetUnfolder]: 7574/14480 cut-off events. [2023-08-30 01:36:58,169 INFO L131 PetriNetUnfolder]: For 79279/79327 co-relation queries the response was YES. [2023-08-30 01:36:58,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59377 conditions, 14480 events. 7574/14480 cut-off events. For 79279/79327 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 98172 event pairs, 915 based on Foata normal form. 30/14398 useless extension candidates. Maximal degree in co-relation 59344. Up to 2732 conditions per place. [2023-08-30 01:36:58,332 INFO L137 encePairwiseOnDemand]: 297/314 looper letters, 473 selfloop transitions, 214 changer transitions 125/816 dead transitions. [2023-08-30 01:36:58,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 816 transitions, 7385 flow [2023-08-30 01:36:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-30 01:36:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-30 01:36:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 8476 transitions. [2023-08-30 01:36:58,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38019197990490716 [2023-08-30 01:36:58,353 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 8476 transitions. [2023-08-30 01:36:58,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 8476 transitions. [2023-08-30 01:36:58,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 01:36:58,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 8476 transitions. [2023-08-30 01:36:58,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 119.38028169014085) internal successors, (8476), 71 states have internal predecessors, (8476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:36:58,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 314.0) internal successors, (22608), 72 states have internal predecessors, (22608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:36:58,395 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 314.0) internal successors, (22608), 72 states have internal predecessors, (22608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:36:58,395 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 647 flow. Second operand 71 states and 8476 transitions. [2023-08-30 01:36:58,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 816 transitions, 7385 flow [2023-08-30 01:36:58,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 816 transitions, 7380 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 01:36:58,606 INFO L231 Difference]: Finished difference. Result has 187 places, 283 transitions, 2916 flow [2023-08-30 01:36:58,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=2916, PETRI_PLACES=187, PETRI_TRANSITIONS=283} [2023-08-30 01:36:58,606 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 135 predicate places. [2023-08-30 01:36:58,607 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 283 transitions, 2916 flow [2023-08-30 01:36:58,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 114.29629629629629) internal successors, (3086), 27 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:36:58,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 01:36:58,608 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 01:36:58,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 01:36:58,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 01:36:58,815 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2023-08-30 01:36:58,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 01:36:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1973238672, now seen corresponding path program 2 times [2023-08-30 01:36:58,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 01:36:58,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674191104] [2023-08-30 01:36:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 01:36:58,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 01:36:58,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-30 01:36:58,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406576224] [2023-08-30 01:36:58,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 01:36:58,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 01:36:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 01:36:58,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 01:36:58,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 01:36:59,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 01:36:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 01:36:59,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 01:36:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 01:37:00,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-08-30 01:37:00,941 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 01:37:00,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 01:37:00,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-08-30 01:37:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:37:00,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 01:37:01,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-08-30 01:37:01,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 01:37:01,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 75 [2023-08-30 01:37:01,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 01:37:01,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 131 [2023-08-30 01:38:36,829 WARN L222 SmtUtils]: Spent 53.42s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:39:51,910 WARN L222 SmtUtils]: Spent 13.24s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:39:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 01:39:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 01:39:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674191104] [2023-08-30 01:39:58,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-30 01:39:58,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406576224] [2023-08-30 01:39:58,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406576224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 01:39:58,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 01:39:58,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 28 [2023-08-30 01:39:58,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560527569] [2023-08-30 01:39:58,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 01:39:58,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 01:39:58,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 01:39:58,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 01:39:58,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=750, Unknown=4, NotChecked=0, Total=870 [2023-08-30 01:40:00,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:03,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:06,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:09,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:12,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:15,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:17,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-08-30 01:40:19,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:21,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-08-30 01:40:24,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:27,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:30,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:32,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:34,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:36,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:38,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-08-30 01:40:42,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-08-30 01:40:45,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:47,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:49,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:54,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:57,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:40:59,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:02,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:07,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:09,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:12,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:15,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:18,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:20,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:22,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:24,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-08-30 01:41:29,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-08-30 01:41:32,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:34,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:38,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:40,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:41,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2023-08-30 01:41:44,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:41:44,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 314 [2023-08-30 01:41:44,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 283 transitions, 2916 flow. Second operand has 30 states, 30 states have (on average 94.86666666666666) internal successors, (2846), 30 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 01:41:44,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 01:41:44,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 314 [2023-08-30 01:41:44,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 01:41:58,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:44:22,125 WARN L222 SmtUtils]: Spent 2.33m on a formula simplification. DAG size of input: 160 DAG size of output: 154 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:47:10,385 WARN L222 SmtUtils]: Spent 2.49m on a formula simplification. DAG size of input: 145 DAG size of output: 139 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 01:47:12,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:47:15,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:47:17,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:47:20,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-08-30 01:47:23,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] Killed by 15